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c5a2634657
Pet attacks were never resolved in turn-based fights. Roll the proc once at fight start (a per-round roll would make a proc near-certain over a long manual fight), persist it on the session so suspend/resume and reaper auto-play honor the same outcome, and land a single pet hit on the player's first acting turn. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
1024 lines
37 KiB
Go
1024 lines
37 KiB
Go
package plugin
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import "math/rand/v2"
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// ── Core Types ───────────────────────────────────────────────────────────────
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type CombatStats struct {
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MaxHP int
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// StartHP is the HP the combatant *enters* this fight at. Zero means
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// "use MaxHP" (full health). Wounded carry-over uses this so MaxHP
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// stays stable across fights — display reads "100/123", not "100/100".
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StartHP int
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// HPBonus is the absolute HP players gain from equipment / arena sets /
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// housing on top of their D&D character sheet HP. DerivePlayerStats
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// computes this; applyDnDPlayerLayer adds it to c.HPMax to form the
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// final combat MaxHP. Kept separate so persistence to dnd_character can
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// simply clamp endHP to c.HPMax — gear cushion doesn't carry over.
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HPBonus int
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Attack int
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Defense int
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Speed int
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CritRate float64 // superseded by nat-20 crits but still consumed by autoCrit logic & equipment scaling.
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DodgeRate float64 // not queried by hit resolution but still computed for narrative scaling.
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BlockRate float64 // still used to halve damage on a successful hit.
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// D&D layer. AC and AttackBonus drive d20-vs-AC hit resolution.
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// Set via dnd_combat.go's applyDnDPlayerLayer / applyDnDArenaMonsterLayer / applyDnDDungeonMonsterLayer.
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AC int
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AttackBonus int
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// Phase 8 — equipment-driven damage. When Weapon is non-nil, the d20
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// attack path rolls weapon damage dice + AbilityModForDamage instead of
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// the legacy calcDamage penetration formula. When nil, legacy math
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// applies (used by monsters and any combatant without a D&D weapon).
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Weapon *WeaponProfile
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AbilityModForDamage int
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WeaponProficient bool // false → -4 attack penalty (appendix §8 implementation note)
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TwoHandedMode bool // true + versatile weapon → use larger versatile die
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}
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type CombatModifiers struct {
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DamageBonus float64 // additive: 0 = neutral, 0.25 = +25% damage. Applied as (1 + DamageBonus).
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DamageReduct float64 // multiplicative damage-taken reduction, 1.0 = neutral
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DeathSave bool // Sovereign reprieve — survive one lethal hit
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PetAttackProc float64
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PetAttackDmg int
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PetDeflectProc float64
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PetWhiffProc float64 // pet distracts enemy → guaranteed miss
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SniperKillProc float64 // Arina instant-kill
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MistyHealProc float64
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MistyHealAmt int
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CrowdRevengeProc float64 // Misty debuff: chance per round of crowd damage
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CrowdRevengeDmg int // Misty debuff: damage per proc
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HealItem int // consumable: HP restored per heal trigger
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// HealItemCharges is the number of times the heal-at-<50%-HP trigger
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// can fire. 1 = legacy one-shot. Boss fights set this from inventory
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// healing-item count so a stocked-up player can sustain through long
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// fights instead of the heal becoming a single weak trigger.
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HealItemCharges int
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// InitiativeBias adds to the player's initiative roll each round.
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// Used by the DM mood system to tilt who-goes-first: positive favors
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// the player (Effusive mood), negative favors the enemy (Hostile).
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InitiativeBias float64
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WardCharges int // consumable: hits fully absorbed
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SporeCloud int // consumable: rounds of 15% enemy miss chance
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ReflectNext float64 // consumable: fraction of next hit reflected
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AutoCritFirst bool // consumable: first player hit is auto-crit
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FlatDmgStart int // consumable: flat damage to enemy pre-combat
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// D&D race passives (Phase 3 — race traits with combat hooks).
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LuckyReroll bool // Halfling: reroll the first nat 1 of the fight
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RageReady bool // Orc: when HP first drops <50%, next attack deals +50% damage
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PoisonResist bool // Dwarf: poison tick damage halved
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// Phase 10 SUB2a — subclass combat hooks.
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// CritThreshold: lowest d20 roll that crits. 0 = use default (20).
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// Champion L5 Improved Critical sets this to 19; Champion L15
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// Superior Critical (SUB3) will set 18.
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CritThreshold int
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// BerserkerRage: while true, +RageMeleeDmg flat damage per hit and
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// incoming weapon damage halved (PhysicalResistRage). Frenzy also
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// adds FrenzyDmgBonus on top to model the bonus-attack-per-turn that
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// one-shot combat can't represent literally. Set by armed `rage`
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// ability for Berserker subclass.
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BerserkerRage bool
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RageMeleeDmg int // flat damage per hit while raging (5: +2)
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PhysicalResistRage bool // halve incoming physical damage while raging
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FrenzyDmgBonus float64 // multiplicative dmg bump while raging (Frenzy approximation)
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// Phase 10 SUB2a-ii — Battle Master + Assassin.
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// FirstAttackBonus: flat bonus added to the player's first d20 attack
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// roll only (Battle Master Precision Attack ≈ +d8). Consumed on first
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// roll regardless of hit/miss (5e: "before or after rolling").
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// AssassinateAdvantage: re-roll the player's first miss (better of two
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// d20s on the first attack) — proxy for "advantage vs. creatures that
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// haven't acted yet".
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// AssassinateBonusDmg: flat extra damage stacked on the first hit (rides
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// the existing AutoCritFirst doubling — proxy for Death Strike's
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// "crits vs. surprised").
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FirstAttackBonus int
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AssassinateAdvantage bool
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AssassinateBonusDmg int
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// Phase 10 SUB3c — Cleric Divine Strike. Flat bonus damage on every
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// weapon hit (5e: "once per turn", which lands ~per round in our model).
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// Damage type (radiant/weapon/poison) varies by Cleric subclass but is
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// not tracked in our engine. Only fires on the weapon-dice damage path —
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// no Weapon → no Divine Strike.
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DivineStrikePerHit int
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// Phase 10 SUB2b — Mage subclasses.
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// ArcaneWardHP: flat HP buffer absorbed before player HP. Refilled at the
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// start of each combat by Abjuration L5+ (2× Mage level, +prof at L7).
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// Persists across rounds within a single combat; not refunded between fights.
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// GrimHarvestSlot/Necrotic: snapshot of the queued spell stashed by
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// applyPendingCast for the post-combat Grim Harvest hook (Necromancy L5+).
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// Heal fires only if the spell event is what dropped the enemy to 0.
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ArcaneWardHP int
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GrimHarvestSlot int
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GrimHarvestNecrotic bool
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// Phase 9 — pending spell resolution. Set by applyPendingCast in
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// dnd_spell_combat.go before SimulateCombat runs. SpellPreDamage is
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// dealt as a pre-combat event with SpellPreDamageDesc as the narrative
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// hook (spell name + flavor). SpellEnemySkipFirst causes the enemy to
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// skip its attack on the first round (Hold Person, Sleep, etc.).
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// Buffs (Bless, Mage Armor, Hunter's Mark) are folded into stats/mods
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// directly and don't surface here.
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SpellPreDamage int
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SpellPreDamageDesc string
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SpellEnemySkipFirst bool
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}
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type Combatant struct {
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Name string
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Stats CombatStats
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Mods CombatModifiers
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IsPlayer bool
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Ability *MonsterAbility // non-nil for monsters with a special ability
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}
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type CombatPhase struct {
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Name string
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Rounds int
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AttackWeight float64
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DefenseWeight float64
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SpeedWeight float64
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EnvironmentProc float64
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}
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type CombatEvent struct {
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Round int
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Phase string
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Actor string // "player", "enemy", "pet", "environment", "npc", "consumable"
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Action string
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Damage int
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PlayerHP int
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EnemyHP int
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Desc string // optional flavor (item name, ability name)
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// D&D layer fields. Set only on events from the d20-vs-AC resolution path.
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// Roll is the raw d20 (1..20); RollAgainst is the target AC.
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Roll int
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RollAgainst int
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}
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type CombatResult struct {
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PlayerWon bool
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// TimedOut is true when the fight ran out the phase clock without a
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// kill on either side and was decided by the HP-percentage tiebreak.
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// Callers should treat a timeout loss as a retreat / escape — the
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// player didn't actually take a fatal blow, so character-death side
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// effects (markAdventureDead, respawn timer) should NOT fire.
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TimedOut bool
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Events []CombatEvent
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PlayerStartHP int // MaxHP — display denominator
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// PlayerEntryHP is the actual HP the player entered combat with (== MaxHP
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// at full health, less when wounded carry-over via applyDnDHPScaling).
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// Used by injectConsumableEvents so pre-combat narration shows the
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// wounded entry state instead of lying "47/47" on the consumable line.
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PlayerEntryHP int
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EnemyStartHP int
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EnemyEntryHP int
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PlayerEndHP int
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EnemyEndHP int
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TotalRounds int
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Closeness float64
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NearDeath bool
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PetAttacked bool
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PetDeflected bool
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SniperKilled bool
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MistyHealed bool
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}
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// ── Monster Abilities ────────────────────────────────────────────────────────
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type MonsterAbility struct {
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Name string
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Phase string // "opening", "clash", "decisive", "any"
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ProcChance float64
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Effect string // "poison", "enrage", "armor_break", "stun", "lifesteal", "cleave"
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}
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// ── Default Phase Definitions ────────────────────────────────────────────────
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// Sudden Death is a fallback phase that runs only when none of the earlier
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// phases produced a kill. Adds enough rounds to push total combat length
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// to ~10 in the worst case, so the absolute-HP tiebreaker below is rarely
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// hit. Players reported the prior 6-round insta-timeout felt arbitrary
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// when both sides still had plenty of HP.
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var defaultCombatPhases = []CombatPhase{
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{"Opening", 2, 0.6, 0.8, 1.5, 0.15},
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{"Clash", 3, 1.2, 1.0, 0.8, 0.08},
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{"Decisive", 1, 1.0, 0.7, 1.0, 0.05},
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{"Sudden Death", 3, 1.1, 0.6, 1.0, 0.05},
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}
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var dungeonCombatPhases = []CombatPhase{
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{"Opening", 1, 0.8, 0.8, 1.2, 0.10},
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{"Clash", 2, 1.0, 1.0, 0.8, 0.08},
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{"Decisive", 1, 1.0, 0.7, 1.0, 0.05},
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{"Sudden Death", 4, 1.1, 0.6, 1.0, 0.05},
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}
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// bossCombatPhases extends the regular dungeon phases for boss encounters.
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// Boss HP pools (97–546) are too large for auto-resolve to close in the
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// 8-round dungeon budget — players hit a wall and time out. Doubling the
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// Sudden Death budget gives sustained pressure a chance to close the gap.
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// Real fix is the turn-based-bosses refactor; this is the bridge tuning.
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var bossCombatPhases = []CombatPhase{
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{"Opening", 1, 0.8, 0.8, 1.2, 0.10},
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{"Clash", 3, 1.0, 1.0, 0.8, 0.08},
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{"Decisive", 2, 1.0, 0.7, 1.0, 0.05},
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{"Sudden Death", 10, 1.1, 0.6, 1.0, 0.05},
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}
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// ── Simulation ───────────────────────────────────────────────────────────────
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// combatState tracks mutable state during the simulation.
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type combatState struct {
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playerHP int
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enemyHP int
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// Consumable one-shots
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healChargesLeft int // remaining heal-at-<50% triggers
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wardCharges int
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sporeRounds int
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reflectFrac float64
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autoCrit bool
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// Monster ability effects
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poisonTicks int
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poisonDmg int
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stunPlayer bool
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enraged bool
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armorBroken bool
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armorBreakAmt float64
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// Sovereign reprieve
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deathSaveUsed bool
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// D&D race-passive state
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luckyUsed bool // Halfling Lucky reroll consumed
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raged bool // Orc Rage already triggered this fight
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pendingRageAttack bool // next player attack gets +50% damage
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// Phase 9 spell — enemy skip-first-attack (consumed on the first round
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// the enemy would otherwise attack).
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enemySkipFirst bool
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// Phase 13 turn-based — pet attack decided once at fight start; the pet
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// strikes once on the player's first acting turn, which clears this.
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petProcReady bool
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// Phase 10 SUB2a-ii first-attack one-shots.
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firstAttackBonusUsed bool
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assassinateRerollUsed bool
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assassinateBonusUsed bool
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// Phase 10 SUB2b — Abjuration Arcane Ward HP buffer.
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arcaneWardHP int
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round int
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events []CombatEvent
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// rng, when non-nil, is the deterministic source the turn-based engine
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// and the timeout reaper seed per session so a fight can be resumed and
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// replayed reproducibly. Auto-resolve (SimulateCombat called without a
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// session) leaves this nil and the engine falls back to the package
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// global — behaviorally identical to the pre-injection code.
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rng *rand.Rand
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}
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// roll / randFloat draw from the session's injected rng when present,
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// else the package global (see rngIntN / rngFloat in dnd_zone_loot.go).
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// Auto-resolve leaves st.rng nil — behaviorally identical to the
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// pre-injection code; the turn-based engine and the timeout reaper seed
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// it per session so a fight can be resumed and replayed reproducibly.
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func (st *combatState) roll(n int) int { return rngIntN(st.rng, n) }
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func (st *combatState) randFloat() float64 { return rngFloat(st.rng) }
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func SimulateCombat(player, enemy Combatant, phases []CombatPhase) CombatResult {
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return simulateCombatWithRNG(player, enemy, phases, nil)
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}
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// simulateCombatWithRNG is the deterministic core of the auto-resolve engine.
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// SimulateCombat passes nil (package-global rand — production auto-resolve).
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// The characterization test and the turn-based engine pass a seeded *rand.Rand
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// so a fight is fully reproducible. Passing nil is behaviorally identical to
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// the pre-injection code.
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func simulateCombatWithRNG(player, enemy Combatant, phases []CombatPhase, rng *rand.Rand) CombatResult {
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playerStart := player.Stats.MaxHP
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if player.Stats.StartHP > 0 && player.Stats.StartHP < player.Stats.MaxHP {
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playerStart = player.Stats.StartHP
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}
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enemyStart := enemy.Stats.MaxHP
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if enemy.Stats.StartHP > 0 && enemy.Stats.StartHP < enemy.Stats.MaxHP {
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enemyStart = enemy.Stats.StartHP
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}
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st := &combatState{
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playerHP: playerStart,
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enemyHP: enemyStart,
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wardCharges: player.Mods.WardCharges,
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sporeRounds: player.Mods.SporeCloud,
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reflectFrac: player.Mods.ReflectNext,
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autoCrit: player.Mods.AutoCritFirst,
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enemySkipFirst: player.Mods.SpellEnemySkipFirst,
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arcaneWardHP: player.Mods.ArcaneWardHP,
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rng: rng,
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}
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// HealItemCharges: explicit count overrides legacy one-shot. Backfill
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// to 1 charge if the caller set a HealItem amount but no count.
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st.healChargesLeft = player.Mods.HealItemCharges
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if st.healChargesLeft == 0 && player.Mods.HealItem > 0 {
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st.healChargesLeft = 1
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}
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result := CombatResult{
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PlayerStartHP: player.Stats.MaxHP,
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PlayerEntryHP: playerStart,
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EnemyStartHP: enemy.Stats.MaxHP,
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EnemyEntryHP: enemyStart,
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}
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// Pre-combat: Arina sniper check
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if player.Mods.SniperKillProc > 0 && st.randFloat() < player.Mods.SniperKillProc {
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st.enemyHP = 0
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st.events = append(st.events, CombatEvent{
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Round: 0, Phase: "pre_combat", Actor: "npc", Action: "sniper_kill",
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Damage: enemy.Stats.MaxHP, PlayerHP: st.playerHP, EnemyHP: 0,
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Desc: "Arina",
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})
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result.SniperKilled = true
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return finalize(result, st, player, enemy)
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}
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// Pre-combat: Coal Bomb / flat start damage
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if player.Mods.FlatDmgStart > 0 {
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dmg := player.Mods.FlatDmgStart
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st.enemyHP = max(0, st.enemyHP-dmg)
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st.events = append(st.events, CombatEvent{
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Round: 0, Phase: "pre_combat", Actor: "consumable", Action: "flat_damage",
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Damage: dmg, PlayerHP: st.playerHP, EnemyHP: st.enemyHP,
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})
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if st.enemyHP <= 0 {
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return finalize(result, st, player, enemy)
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}
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}
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// Pre-combat: queued spell. Resolved by applyPendingCast() before this
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// runs — the modifiers carry the resolved damage and narrative hook.
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if player.Mods.SpellPreDamageDesc != "" {
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dmg := player.Mods.SpellPreDamage
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if dmg > 0 {
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st.enemyHP = max(0, st.enemyHP-dmg)
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}
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st.events = append(st.events, CombatEvent{
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Round: 0, Phase: "pre_combat", Actor: "player", Action: "spell_cast",
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Damage: dmg, PlayerHP: st.playerHP, EnemyHP: st.enemyHP,
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Desc: player.Mods.SpellPreDamageDesc,
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})
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if st.enemyHP <= 0 {
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return finalize(result, st, player, enemy)
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}
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}
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// Pre-combat: Misty gourmet is now a per-round heal, no pre-combat damage
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// Main simulation loop
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for _, phase := range phases {
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roundsThisPhase := phase.Rounds
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// Add slight variance: ±1 round for non-Decisive phases
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if phase.Name != "Decisive" && roundsThisPhase > 1 {
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roundsThisPhase += st.roll(2) // 0 or +1
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}
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for r := 0; r < roundsThisPhase; r++ {
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st.round++
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if simulateRound(st, &player, &enemy, &phase, &result) {
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return finalize(result, st, player, enemy)
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}
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}
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}
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// If we exhaust all phases without a kill, tiebreak by HP percentage
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// to decide the *outcome* (PlayerWon flag) — but DO NOT zero out HP
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// on the loser. Timeout = retreat, not lethal blow. Caller treats a
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// timeout loss as "fight ended, no character death".
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//
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// Absolute-HP tiebreak (briefly used on the legacy ~120 HP scale) was
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// wrong post HP-unification: monster pools (~30–175) are 2-3× player
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// pools (~13–83), so absolute always favored the larger combatant
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// even when the player took less proportional damage. Slight bias
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// toward the player on exact ties (frac >=).
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result.TimedOut = true
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playerFrac := float64(st.playerHP) / float64(max(1, player.Stats.MaxHP))
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enemyFrac := float64(st.enemyHP) / float64(max(1, enemy.Stats.MaxHP))
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playerWonTiebreak := playerFrac >= enemyFrac
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st.events = append(st.events, CombatEvent{
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Round: st.round, Phase: "exhaust", Actor: "system", Action: "timeout",
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PlayerHP: st.playerHP, EnemyHP: st.enemyHP,
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})
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out := finalize(result, st, player, enemy)
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out.PlayerWon = playerWonTiebreak
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return out
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}
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// simulateRound runs one round. Returns true if combat is over.
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func simulateRound(st *combatState, player, enemy *Combatant, phase *CombatPhase, result *CombatResult) bool {
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phaseName := phase.Name
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// Phase 9 spell: control effect (Hold Person, Sleep, Command) skips the
|
||
// enemy's attack for one round. Logged as a dedicated event so narrative
|
||
// can read it as a held/stunned beat rather than a generic miss.
|
||
enemyHeldThisRound := false
|
||
if st.enemySkipFirst {
|
||
st.enemySkipFirst = false
|
||
enemyHeldThisRound = true
|
||
st.events = append(st.events, CombatEvent{
|
||
Round: st.round, Phase: phaseName, Actor: "enemy", Action: "spell_held",
|
||
PlayerHP: st.playerHP, EnemyHP: st.enemyHP,
|
||
})
|
||
}
|
||
|
||
// Monster ability: check at round start
|
||
abilityDealtDamage := enemyHeldThisRound
|
||
if enemy.Ability != nil {
|
||
if abilityFires(enemy.Ability, phaseName, st) {
|
||
if applyAbility(st, player, enemy, phase, result) {
|
||
return true
|
||
}
|
||
// Cleave and lifesteal deal damage — skip normal enemy attack this round
|
||
switch enemy.Ability.Effect {
|
||
case "cleave", "lifesteal":
|
||
abilityDealtDamage = true
|
||
}
|
||
}
|
||
}
|
||
|
||
// Poison tick from previous round
|
||
if st.poisonTicks > 0 {
|
||
st.playerHP = max(0, st.playerHP-st.poisonDmg)
|
||
st.poisonTicks--
|
||
st.events = append(st.events, CombatEvent{
|
||
Round: st.round, Phase: phaseName, Actor: "enemy", Action: "poison_tick",
|
||
Damage: st.poisonDmg, PlayerHP: st.playerHP, EnemyHP: st.enemyHP,
|
||
})
|
||
if st.playerHP <= 0 {
|
||
if trySave(st, player, phaseName) {
|
||
// survived
|
||
} else {
|
||
return true
|
||
}
|
||
}
|
||
}
|
||
|
||
// Pet whiff: if proc'd, enemy's attack this round is a guaranteed miss
|
||
petWhiff := player.Mods.PetWhiffProc > 0 && st.randFloat() < player.Mods.PetWhiffProc
|
||
// Pet deflect: halves incoming damage to player this round
|
||
petDeflect := player.Mods.PetDeflectProc > 0 && st.randFloat() < player.Mods.PetDeflectProc
|
||
if petDeflect {
|
||
result.PetDeflected = true
|
||
}
|
||
|
||
// Spore cloud: enemy has 15% miss chance (decremented when enemy actually attacks)
|
||
sporeMiss := st.sporeRounds > 0 && st.randFloat() < 0.15
|
||
|
||
// Determine initiative. DM mood (Effusive/Hostile) biases the player's
|
||
// roll via player.Mods.InitiativeBias — +X means player goes first
|
||
// more often, -X means the enemy does.
|
||
playerSpeed := float64(player.Stats.Speed) * phase.SpeedWeight
|
||
enemySpeed := float64(enemy.Stats.Speed) * phase.SpeedWeight
|
||
playerInit := playerSpeed + st.randFloat()*10 + player.Mods.InitiativeBias
|
||
enemyInit := enemySpeed + st.randFloat()*10
|
||
playerFirst := playerInit >= enemyInit
|
||
|
||
if playerFirst {
|
||
if resolvePlayerAttack(st, player, enemy, phase, result) {
|
||
return true
|
||
}
|
||
if !abilityDealtDamage {
|
||
if resolveEnemyAttack(st, player, enemy, phase, result, petWhiff, petDeflect, sporeMiss) {
|
||
return true
|
||
}
|
||
}
|
||
} else {
|
||
if !abilityDealtDamage {
|
||
if resolveEnemyAttack(st, player, enemy, phase, result, petWhiff, petDeflect, sporeMiss) {
|
||
return true
|
||
}
|
||
}
|
||
if resolvePlayerAttack(st, player, enemy, phase, result) {
|
||
return true
|
||
}
|
||
}
|
||
|
||
// Environmental hazard
|
||
if phase.EnvironmentProc > 0 && st.randFloat() < phase.EnvironmentProc {
|
||
envDmg := 2 + st.roll(5)
|
||
st.playerHP = max(0, st.playerHP-envDmg)
|
||
st.events = append(st.events, CombatEvent{
|
||
Round: st.round, Phase: phaseName, Actor: "environment", Action: "environmental",
|
||
Damage: envDmg, PlayerHP: st.playerHP, EnemyHP: st.enemyHP,
|
||
})
|
||
if st.playerHP <= 0 {
|
||
if !trySave(st, player, phaseName) {
|
||
return true
|
||
}
|
||
}
|
||
}
|
||
|
||
// Misty crowd revenge (debuff for declining Misty)
|
||
if player.Mods.CrowdRevengeProc > 0 && st.randFloat() < player.Mods.CrowdRevengeProc {
|
||
dmg := player.Mods.CrowdRevengeDmg
|
||
st.playerHP = max(0, st.playerHP-dmg)
|
||
st.events = append(st.events, CombatEvent{
|
||
Round: st.round, Phase: phaseName, Actor: "environment", Action: "crowd_revenge",
|
||
Damage: dmg, PlayerHP: st.playerHP, EnemyHP: st.enemyHP,
|
||
Desc: "Misty's crowd",
|
||
})
|
||
if st.playerHP <= 0 {
|
||
if !trySave(st, player, phaseName) {
|
||
return true
|
||
}
|
||
}
|
||
}
|
||
|
||
// Pet attack
|
||
if player.Mods.PetAttackProc > 0 && st.randFloat() < player.Mods.PetAttackProc {
|
||
petDmg := player.Mods.PetAttackDmg + st.roll(5)
|
||
st.enemyHP = max(0, st.enemyHP-petDmg)
|
||
result.PetAttacked = true
|
||
st.events = append(st.events, CombatEvent{
|
||
Round: st.round, Phase: phaseName, Actor: "pet", Action: "pet_attack",
|
||
Damage: petDmg, PlayerHP: st.playerHP, EnemyHP: st.enemyHP,
|
||
})
|
||
if st.enemyHP <= 0 {
|
||
return true
|
||
}
|
||
}
|
||
|
||
// Misty heal
|
||
if player.Mods.MistyHealProc > 0 && st.randFloat() < player.Mods.MistyHealProc {
|
||
healAmt := player.Mods.MistyHealAmt
|
||
st.playerHP = min(player.Stats.MaxHP, st.playerHP+healAmt)
|
||
result.MistyHealed = true
|
||
st.events = append(st.events, CombatEvent{
|
||
Round: st.round, Phase: phaseName, Actor: "npc", Action: "misty_heal",
|
||
Damage: healAmt, PlayerHP: st.playerHP, EnemyHP: st.enemyHP,
|
||
Desc: "Misty",
|
||
})
|
||
}
|
||
|
||
// Consumable heal: triggers when player drops below 60% HP. Fires up
|
||
// to HealItemCharges times per fight (1 = legacy one-shot; bosses can
|
||
// stack from inventory).
|
||
//
|
||
// Threshold is 60% rather than 50% to give low-HP classes (cleric,
|
||
// mage) more breathing room — at 50% a cleric was bleeding into the
|
||
// danger zone before the heal fired.
|
||
if st.healChargesLeft > 0 && player.Mods.HealItem > 0 &&
|
||
st.playerHP > 0 && st.playerHP*5 < player.Stats.MaxHP*3 {
|
||
st.healChargesLeft--
|
||
healAmt := player.Mods.HealItem
|
||
st.playerHP = min(player.Stats.MaxHP, st.playerHP+healAmt)
|
||
st.events = append(st.events, CombatEvent{
|
||
Round: st.round, Phase: phaseName, Actor: "consumable", Action: "heal_item",
|
||
Damage: healAmt, PlayerHP: st.playerHP, EnemyHP: st.enemyHP,
|
||
})
|
||
}
|
||
|
||
return false
|
||
}
|
||
|
||
// ── Attack Resolution ────────────────────────────────────────────────────────
|
||
|
||
// resolvePlayerAttack — d20 + AttackBonus vs enemy AC.
|
||
// Nat 20 = auto-hit + crit. Nat 1 = auto-miss tagged "fumble".
|
||
// Block (on hit) halves damage. autoCrit consumable forces a crit on hit.
|
||
func resolvePlayerAttack(st *combatState, player, enemy *Combatant, phase *CombatPhase, result *CombatResult) bool {
|
||
phaseName := phase.Name
|
||
|
||
// Stun: player skips attack
|
||
if st.stunPlayer {
|
||
st.stunPlayer = false
|
||
st.events = append(st.events, CombatEvent{
|
||
Round: st.round, Phase: phaseName, Actor: "player", Action: "stunned",
|
||
PlayerHP: st.playerHP, EnemyHP: st.enemyHP,
|
||
})
|
||
return false
|
||
}
|
||
|
||
// Orc Rage: trigger on the first attack after dropping below 50% HP.
|
||
// Use HP*2 < MaxHP rather than HP < MaxHP/2 so the threshold is exact
|
||
// regardless of MaxHP parity (avoids per-character drift on odd MaxHP).
|
||
if player.Mods.RageReady && !st.raged && st.playerHP > 0 &&
|
||
st.playerHP*2 < player.Stats.MaxHP {
|
||
st.raged = true
|
||
st.pendingRageAttack = true
|
||
st.events = append(st.events, CombatEvent{
|
||
Round: st.round, Phase: phaseName, Actor: "player", Action: "rage",
|
||
PlayerHP: st.playerHP, EnemyHP: st.enemyHP, Desc: "Orc Rage",
|
||
})
|
||
}
|
||
|
||
roll := 1 + st.roll(20)
|
||
// Halfling Lucky: reroll the first nat 1 of the fight.
|
||
if roll == 1 && player.Mods.LuckyReroll && !st.luckyUsed {
|
||
st.luckyUsed = true
|
||
newRoll := 1 + st.roll(20)
|
||
st.events = append(st.events, CombatEvent{
|
||
Round: st.round, Phase: phaseName, Actor: "player", Action: "lucky_reroll",
|
||
PlayerHP: st.playerHP, EnemyHP: st.enemyHP,
|
||
Roll: newRoll, RollAgainst: enemy.Stats.AC, Desc: "Halfling Lucky",
|
||
})
|
||
roll = newRoll
|
||
}
|
||
// Phase 10 SUB2a-ii — Assassin advantage: re-roll the first attack of
|
||
// the fight, take the better of two d20s. Models 5e's "advantage vs.
|
||
// creatures that haven't acted yet" applied to the opening strike only.
|
||
if player.Mods.AssassinateAdvantage && !st.assassinateRerollUsed {
|
||
st.assassinateRerollUsed = true
|
||
alt := 1 + st.roll(20)
|
||
if alt > roll {
|
||
st.events = append(st.events, CombatEvent{
|
||
Round: st.round, Phase: phaseName, Actor: "player", Action: "assassinate_advantage",
|
||
PlayerHP: st.playerHP, EnemyHP: st.enemyHP,
|
||
Roll: alt, RollAgainst: enemy.Stats.AC, Desc: "Assassinate",
|
||
})
|
||
roll = alt
|
||
}
|
||
}
|
||
isFumble := roll == 1
|
||
critFloor := attackCritFloor(player.Mods)
|
||
isCritRoll := roll >= critFloor
|
||
attackBonus := effectiveAttackBonus(player.Stats)
|
||
// Phase 10 SUB2a-ii — Battle Master Precision Attack: +d8 (modeled as
|
||
// flat +4) to the first attack roll only. Consumed even on miss.
|
||
if player.Mods.FirstAttackBonus > 0 && !st.firstAttackBonusUsed {
|
||
attackBonus += player.Mods.FirstAttackBonus
|
||
st.firstAttackBonusUsed = true
|
||
}
|
||
total := roll + attackBonus
|
||
|
||
if !attackConnects(roll, total, enemy.Stats.AC, critFloor) {
|
||
desc := ""
|
||
if isFumble {
|
||
desc = "fumble"
|
||
}
|
||
st.events = append(st.events, CombatEvent{
|
||
Round: st.round, Phase: phaseName, Actor: "player", Action: "miss",
|
||
PlayerHP: st.playerHP, EnemyHP: st.enemyHP,
|
||
Roll: roll, RollAgainst: enemy.Stats.AC, Desc: desc,
|
||
})
|
||
return false
|
||
}
|
||
|
||
// Damage roll: weapon dice path (Phase 8) or legacy penetration formula.
|
||
var dmg int
|
||
if player.Stats.Weapon != nil {
|
||
// Unproficient wielders don't add their ability mod to damage.
|
||
mod := player.Stats.AbilityModForDamage
|
||
if !player.Stats.WeaponProficient {
|
||
mod = 0
|
||
}
|
||
total, _ := rollWeaponDamage(st.rng, player.Stats.Weapon, mod, player.Stats.TwoHandedMode)
|
||
dmg = total
|
||
// Class damage bonus / streak bonus / etc. layered on top via DamageBonus.
|
||
if player.Mods.DamageBonus > 0 {
|
||
dmg = int(float64(dmg) * (1 + player.Mods.DamageBonus))
|
||
}
|
||
// Apply enemy damage reduction (consumables, sets) the same way calcDamage does.
|
||
if enemy.Mods.DamageReduct > 0 && enemy.Mods.DamageReduct != 1.0 {
|
||
dmg = int(float64(dmg) * enemy.Mods.DamageReduct)
|
||
}
|
||
} else {
|
||
dmg = calcDamage(st.rng, player.Stats.Attack, phase.AttackWeight, player.Mods.DamageBonus,
|
||
enemy.Stats.Defense, phase.DefenseWeight, enemy.Mods.DamageReduct)
|
||
}
|
||
|
||
blocked := enemy.Stats.BlockRate > 0 && st.randFloat() < enemy.Stats.BlockRate
|
||
if blocked {
|
||
dmg = max(1, dmg/2)
|
||
}
|
||
|
||
dmg, action, desc := applyPlayerHitDamageMods(st, player, dmg, isCritRoll, blocked)
|
||
|
||
st.enemyHP = max(0, st.enemyHP-dmg)
|
||
st.events = append(st.events, CombatEvent{
|
||
Round: st.round, Phase: phaseName, Actor: "player", Action: action,
|
||
Damage: dmg, PlayerHP: st.playerHP, EnemyHP: st.enemyHP,
|
||
Roll: roll, RollAgainst: enemy.Stats.AC, Desc: desc,
|
||
})
|
||
return st.enemyHP <= 0
|
||
}
|
||
|
||
// resolveEnemyAttack — enemy rolls d20 + AttackBonus vs player AC.
|
||
// Pet whiff and spore-cloud miss preempt the roll. Ward absorbs a hit fully.
|
||
// Block halves damage. Reflect bounces a fraction back. Death save fires if HP hits 0.
|
||
func resolveEnemyAttack(st *combatState, player, enemy *Combatant, phase *CombatPhase, result *CombatResult, petWhiff, petDeflect, sporeMiss bool) bool {
|
||
phaseName := phase.Name
|
||
|
||
if st.sporeRounds > 0 {
|
||
st.sporeRounds--
|
||
}
|
||
|
||
if petWhiff {
|
||
st.events = append(st.events, CombatEvent{
|
||
Round: st.round, Phase: phaseName, Actor: "pet", Action: "pet_whiff",
|
||
PlayerHP: st.playerHP, EnemyHP: st.enemyHP,
|
||
})
|
||
return false
|
||
}
|
||
|
||
if sporeMiss {
|
||
st.events = append(st.events, CombatEvent{
|
||
Round: st.round, Phase: phaseName, Actor: "consumable", Action: "spore_miss",
|
||
PlayerHP: st.playerHP, EnemyHP: st.enemyHP,
|
||
})
|
||
return false
|
||
}
|
||
|
||
roll := 1 + st.roll(20)
|
||
isFumble := roll == 1
|
||
isNat20 := roll == 20
|
||
total := roll + effectiveAttackBonus(enemy.Stats)
|
||
|
||
if !attackConnects(roll, total, player.Stats.AC, 20) {
|
||
desc := ""
|
||
if isFumble {
|
||
desc = "fumble"
|
||
}
|
||
st.events = append(st.events, CombatEvent{
|
||
Round: st.round, Phase: phaseName, Actor: "enemy", Action: "miss",
|
||
PlayerHP: st.playerHP, EnemyHP: st.enemyHP,
|
||
Roll: roll, RollAgainst: player.Stats.AC, Desc: desc,
|
||
})
|
||
return false
|
||
}
|
||
|
||
if st.wardCharges > 0 {
|
||
st.wardCharges--
|
||
st.events = append(st.events, CombatEvent{
|
||
Round: st.round, Phase: phaseName, Actor: "consumable", Action: "ward_absorb",
|
||
Damage: 0, PlayerHP: st.playerHP, EnemyHP: st.enemyHP,
|
||
})
|
||
return false
|
||
}
|
||
|
||
atkMult := 1.0
|
||
if st.enraged {
|
||
atkMult = 1.5
|
||
}
|
||
dmg := calcDamage(st.rng, int(float64(enemy.Stats.Attack)*atkMult), phase.AttackWeight, enemy.Mods.DamageBonus,
|
||
playerDefense(player, st), phase.DefenseWeight, player.Mods.DamageReduct)
|
||
|
||
blocked := player.Stats.BlockRate > 0 && st.randFloat() < player.Stats.BlockRate
|
||
if blocked {
|
||
dmg = max(1, dmg/2)
|
||
}
|
||
|
||
isCrit := isNat20
|
||
if isCrit {
|
||
dmg *= 2
|
||
}
|
||
// Phase 10 SUB2a — Berserker rage halves incoming weapon damage.
|
||
// Applied AFTER crit-doubling so the resistance survives crits.
|
||
if player.Mods.BerserkerRage && player.Mods.PhysicalResistRage {
|
||
dmg = max(1, dmg/2)
|
||
}
|
||
dmg = max(1, dmg)
|
||
|
||
if petDeflect {
|
||
dmg = max(1, dmg/2)
|
||
st.events = append(st.events, CombatEvent{
|
||
Round: st.round, Phase: phaseName, Actor: "pet", Action: "pet_deflect",
|
||
PlayerHP: st.playerHP, EnemyHP: st.enemyHP,
|
||
})
|
||
}
|
||
|
||
action := "hit"
|
||
if isCrit {
|
||
action = "crit"
|
||
} else if blocked {
|
||
action = "block"
|
||
}
|
||
|
||
// Phase 10 SUB2b — Abjuration Arcane Ward absorbs incoming damage before
|
||
// it hits player HP. Only wired into the standard enemy attack path; tick
|
||
// effects (poison, environment, lifesteal, cleave) bypass the ward in this
|
||
// model — those represent damage-over-time / tactical hits where the
|
||
// abstraction "magical aegis" reads thinner narratively.
|
||
if st.arcaneWardHP > 0 && dmg > 0 {
|
||
absorbed := dmg
|
||
if absorbed > st.arcaneWardHP {
|
||
absorbed = st.arcaneWardHP
|
||
}
|
||
st.arcaneWardHP -= absorbed
|
||
dmg -= absorbed
|
||
st.events = append(st.events, CombatEvent{
|
||
Round: st.round, Phase: phaseName, Actor: "player", Action: "arcane_ward",
|
||
Damage: absorbed, PlayerHP: st.playerHP, EnemyHP: st.enemyHP,
|
||
Desc: "Arcane Ward",
|
||
})
|
||
}
|
||
|
||
st.playerHP = max(0, st.playerHP-dmg)
|
||
st.events = append(st.events, CombatEvent{
|
||
Round: st.round, Phase: phaseName, Actor: "enemy", Action: action,
|
||
Damage: dmg, PlayerHP: st.playerHP, EnemyHP: st.enemyHP,
|
||
Roll: roll, RollAgainst: player.Stats.AC,
|
||
})
|
||
|
||
if st.reflectFrac > 0 {
|
||
reflected := max(1, int(float64(dmg)*st.reflectFrac))
|
||
st.reflectFrac = 0
|
||
st.enemyHP = max(0, st.enemyHP-reflected)
|
||
st.events = append(st.events, CombatEvent{
|
||
Round: st.round, Phase: phaseName, Actor: "consumable", Action: "reflect_damage",
|
||
Damage: reflected, PlayerHP: st.playerHP, EnemyHP: st.enemyHP,
|
||
})
|
||
if st.enemyHP <= 0 {
|
||
return true
|
||
}
|
||
}
|
||
|
||
if st.playerHP <= 0 {
|
||
return !trySave(st, player, phaseName)
|
||
}
|
||
return false
|
||
}
|
||
|
||
// ── Monster Ability Logic ────────────────────────────────────────────────────
|
||
|
||
func abilityFires(ability *MonsterAbility, phaseName string, st *combatState) bool {
|
||
phaseMatch := ability.Phase == "any" ||
|
||
(ability.Phase == "opening" && phaseName == "Opening") ||
|
||
(ability.Phase == "clash" && phaseName == "Clash") ||
|
||
(ability.Phase == "decisive" && phaseName == "Decisive")
|
||
if !phaseMatch {
|
||
return false
|
||
}
|
||
return st.randFloat() < ability.ProcChance
|
||
}
|
||
|
||
func applyAbility(st *combatState, player, enemy *Combatant, phase *CombatPhase, result *CombatResult) bool {
|
||
ab := enemy.Ability
|
||
phaseName := phase.Name
|
||
|
||
switch ab.Effect {
|
||
case "poison":
|
||
st.poisonTicks = 2
|
||
st.poisonDmg = 3 + st.roll(3)
|
||
if player.Mods.PoisonResist {
|
||
st.poisonDmg = max(1, st.poisonDmg/2)
|
||
}
|
||
st.events = append(st.events, CombatEvent{
|
||
Round: st.round, Phase: phaseName, Actor: "enemy", Action: "poison",
|
||
Desc: ab.Name, PlayerHP: st.playerHP, EnemyHP: st.enemyHP,
|
||
})
|
||
|
||
case "enrage":
|
||
if !st.enraged && st.enemyHP < int(float64(enemy.Stats.MaxHP)*0.4) {
|
||
st.enraged = true
|
||
st.events = append(st.events, CombatEvent{
|
||
Round: st.round, Phase: phaseName, Actor: "enemy", Action: "enrage",
|
||
Desc: ab.Name, PlayerHP: st.playerHP, EnemyHP: st.enemyHP,
|
||
})
|
||
}
|
||
|
||
case "armor_break":
|
||
if !st.armorBroken {
|
||
st.armorBroken = true
|
||
st.armorBreakAmt = 0.30
|
||
st.events = append(st.events, CombatEvent{
|
||
Round: st.round, Phase: phaseName, Actor: "enemy", Action: "armor_break",
|
||
Desc: ab.Name, PlayerHP: st.playerHP, EnemyHP: st.enemyHP,
|
||
})
|
||
}
|
||
|
||
case "stun":
|
||
st.stunPlayer = true
|
||
st.events = append(st.events, CombatEvent{
|
||
Round: st.round, Phase: phaseName, Actor: "enemy", Action: "stun",
|
||
Desc: ab.Name, PlayerHP: st.playerHP, EnemyHP: st.enemyHP,
|
||
})
|
||
|
||
case "lifesteal":
|
||
atkMult := 1.0
|
||
if st.enraged {
|
||
atkMult = 1.5
|
||
}
|
||
dmg := calcDamage(st.rng, int(float64(enemy.Stats.Attack)*atkMult), phase.AttackWeight, enemy.Mods.DamageBonus,
|
||
playerDefense(player, st), phase.DefenseWeight, player.Mods.DamageReduct)
|
||
dmg = max(1, dmg)
|
||
st.playerHP = max(0, st.playerHP-dmg)
|
||
heal := dmg / 2
|
||
st.enemyHP = min(enemy.Stats.MaxHP, st.enemyHP+heal)
|
||
st.events = append(st.events, CombatEvent{
|
||
Round: st.round, Phase: phaseName, Actor: "enemy", Action: "lifesteal",
|
||
Damage: dmg, Desc: ab.Name, PlayerHP: st.playerHP, EnemyHP: st.enemyHP,
|
||
})
|
||
if st.playerHP <= 0 {
|
||
return !trySave(st, player, phaseName)
|
||
}
|
||
|
||
case "cleave":
|
||
atkMult := 1.0
|
||
if st.enraged {
|
||
atkMult = 1.5
|
||
}
|
||
dmg1 := calcDamage(st.rng, int(float64(enemy.Stats.Attack)*atkMult), phase.AttackWeight, enemy.Mods.DamageBonus,
|
||
playerDefense(player, st), phase.DefenseWeight, player.Mods.DamageReduct)
|
||
dmg1 = max(1, dmg1)
|
||
st.playerHP = max(0, st.playerHP-dmg1)
|
||
st.events = append(st.events, CombatEvent{
|
||
Round: st.round, Phase: phaseName, Actor: "enemy", Action: "cleave",
|
||
Damage: dmg1, Desc: ab.Name, PlayerHP: st.playerHP, EnemyHP: st.enemyHP,
|
||
})
|
||
if st.playerHP <= 0 {
|
||
if !trySave(st, player, phaseName) {
|
||
return true
|
||
}
|
||
// Death save fired — skip follow-up hit (survived the first blow barely)
|
||
} else {
|
||
dmg2 := max(1, dmg1/2)
|
||
st.playerHP = max(0, st.playerHP-dmg2)
|
||
st.events = append(st.events, CombatEvent{
|
||
Round: st.round, Phase: phaseName, Actor: "enemy", Action: "cleave",
|
||
Damage: dmg2, Desc: ab.Name + " (follow-up)", PlayerHP: st.playerHP, EnemyHP: st.enemyHP,
|
||
})
|
||
if st.playerHP <= 0 {
|
||
return !trySave(st, player, phaseName)
|
||
}
|
||
}
|
||
}
|
||
|
||
return false
|
||
}
|
||
|
||
// ── Helpers ──────────────────────────────────────────────────────────────────
|
||
|
||
// calcDamage uses a penetration model: defense provides diminishing returns
|
||
// reduction rather than flat subtraction, so damage is never fully negated.
|
||
// Formula: rawAtk * reduction where reduction = K / (K + effectiveDef).
|
||
// K=40 means 40 defense halves incoming damage; 80 defense reduces by 67%.
|
||
//
|
||
// A ±15% per-hit jitter is applied so successive hits in the same phase don't
|
||
// produce identical numbers — the previous flat-damage output read as scripted.
|
||
func calcDamage(rng *rand.Rand, attack int, atkWeight, dmgBonus float64, defense int, defWeight, dmgReduct float64) int {
|
||
const K = 40.0
|
||
rawAtk := float64(attack) * atkWeight * (1 + dmgBonus)
|
||
effectiveDef := float64(defense) * defWeight * dmgReduct
|
||
reduction := K / (K + effectiveDef)
|
||
dmg := rawAtk * reduction
|
||
jitter := 0.85 + rngFloat(rng)*0.30 // 0.85 .. 1.15
|
||
dmg *= jitter
|
||
if dmg < 1 {
|
||
return 1
|
||
}
|
||
return int(dmg)
|
||
}
|
||
|
||
func playerDefense(player *Combatant, st *combatState) int {
|
||
def := player.Stats.Defense
|
||
if st.armorBroken {
|
||
def = int(float64(def) * (1 - st.armorBreakAmt))
|
||
}
|
||
return def
|
||
}
|
||
|
||
func trySave(st *combatState, player *Combatant, phaseName string) bool {
|
||
if player.Mods.DeathSave && !st.deathSaveUsed {
|
||
st.deathSaveUsed = true
|
||
st.playerHP = 1
|
||
st.events = append(st.events, CombatEvent{
|
||
Round: st.round, Phase: phaseName, Actor: "player", Action: "death_save",
|
||
PlayerHP: 1, EnemyHP: st.enemyHP, Desc: "Sovereign",
|
||
})
|
||
return true
|
||
}
|
||
return false
|
||
}
|
||
|
||
func finalize(result CombatResult, st *combatState, player, enemy Combatant) CombatResult {
|
||
result.Events = st.events
|
||
result.PlayerEndHP = st.playerHP
|
||
result.EnemyEndHP = st.enemyHP
|
||
result.TotalRounds = st.round
|
||
result.PlayerWon = st.enemyHP <= 0
|
||
|
||
playerMax := max(1, player.Stats.MaxHP)
|
||
enemyMax := max(1, enemy.Stats.MaxHP)
|
||
if result.PlayerWon && st.playerHP > 0 {
|
||
result.NearDeath = float64(st.playerHP) < float64(playerMax)*0.15
|
||
winnerRemaining := float64(st.playerHP) / float64(playerMax)
|
||
result.Closeness = 1.0 - winnerRemaining
|
||
} else if !result.PlayerWon {
|
||
enemyRemaining := float64(st.enemyHP) / float64(enemyMax)
|
||
result.NearDeath = enemyRemaining < 0.15
|
||
result.Closeness = 1.0 - enemyRemaining
|
||
}
|
||
|
||
return result
|
||
}
|