package plugin

// Phase 7 — D&D starter bestiary.
//
// These are named monster definitions ready to slot into encounter content.
// Phase 7 ships them as data only — wiring them into specific dungeons or
// arena rounds is a future content task. The combat engine consumes them
// via the existing DnDMonsterTemplate→CombatStats path (see toCombatStats).

// DnDMonsterTemplate is the bestiary record for a named creature. Mirrors
// v1.0 §8.1's stat block schema, simplified to the subset combat actually
// uses (HP, AC, attack, speed, ability proc, special tags).
type DnDMonsterTemplate struct {
	ID          string
	Name        string
	CR          float32 // challenge rating (display only for now)
	HP          int
	AC          int
	Attack      int  // engine's "Attack" stat (raw damage value)
	AttackBonus int  // d20 to-hit bonus
	Speed       int
	BlockRate   float64
	Ability     *MonsterAbility
	XPValue     int
	Notes       string
}

// dndBestiary is the canonical lookup. Keyed by ID.
var dndBestiary = map[string]DnDMonsterTemplate{
	"goblin": {
		ID: "goblin", Name: "Goblin",
		CR: 0.25, HP: 7, AC: 13, Attack: 6, AttackBonus: 4, Speed: 14,
		BlockRate: 0.05,
		Ability:   &MonsterAbility{Name: "Nimble Escape", Phase: "any", ProcChance: 0.20, Effect: "stun"},
		XPValue:   30,
		Notes:     "Fast and skittish. Escapes pin attempts; will retreat if obviously outmatched.",
	},
	"skeleton": {
		ID: "skeleton", Name: "Skeleton",
		CR: 0.25, HP: 13, AC: 13, Attack: 8, AttackBonus: 4, Speed: 10,
		BlockRate: 0.10,
		// Skeletons are immune to poison; we'd model that with a future
		// CombatModifiers.PoisonImmunity flag. For Phase 7, no ability.
		XPValue: 50,
		Notes:   "Bone-and-rust. Resistant to slashing weapons; vulnerable to bludgeoning.",
	},
	"orc_grunt": {
		ID: "orc_grunt", Name: "Orc Grunt",
		CR: 0.5, HP: 15, AC: 13, Attack: 10, AttackBonus: 5, Speed: 11,
		BlockRate: 0.05,
		Ability:   &MonsterAbility{Name: "Aggressive", Phase: "opening", ProcChance: 0.30, Effect: "enrage"},
		XPValue:   100,
		Notes:     "Charges. Bonus damage on its first hit if it goes first.",
	},
	"troll": {
		ID: "troll", Name: "Troll",
		CR: 5, HP: 84, AC: 15, Attack: 22, AttackBonus: 7, Speed: 8,
		BlockRate: 0.10,
		Ability:   &MonsterAbility{Name: "Regeneration", Phase: "any", ProcChance: 0.50, Effect: "lifesteal"},
		XPValue:   1800,
		Notes:     "Regenerates each round unless burned or acid-burned. Fire/acid damage stops the regen.",
	},
	"wyvern": {
		ID: "wyvern", Name: "Wyvern",
		CR: 6, HP: 110, AC: 13, Attack: 28, AttackBonus: 7, Speed: 16,
		BlockRate: 0.05,
		Ability:   &MonsterAbility{Name: "Poison Sting", Phase: "decisive", ProcChance: 0.60, Effect: "poison"},
		XPValue:   2300,
		Notes:     "Aerial; opens with dive attack. Tail sting injects poison (CON DC 15 in tabletop).",
	},
	"ancient_dragon": {
		ID: "ancient_dragon", Name: "Ancient Dragon",
		CR: 20, HP: 367, AC: 22, Attack: 65, AttackBonus: 14, Speed: 18,
		BlockRate: 0.15,
		Ability:   &MonsterAbility{Name: "Frightful Presence", Phase: "opening", ProcChance: 0.80, Effect: "stun"},
		XPValue:   25000,
		Notes:     "Legendary. Breath weapon (cleave-equivalent), frightful presence on opening, regenerates between phases. Tabletop equivalent has legendary actions; the engine approximates with elevated stats.",
	},
}

// ---- Tier 1 zone roster (Phase 11 D1a) ---------------------------------------
//
// Goblin Warrens + Crypt of Valdris enemy entries. Stat blocks per
// gogobee_dungeon_zones.md §5. AttackBonus and Attack are derived from
// each creature's primary attack profile in 5e (rounded for the engine's
// integer "Attack" stat — engine treats this as average damage).

var _ = func() bool {
	tier1 := map[string]DnDMonsterTemplate{
		"goblin_sneak": {
			ID: "goblin_sneak", Name: "Goblin Sneak",
			CR: 0.25, HP: 7, AC: 13, Attack: 6, AttackBonus: 4, Speed: 14,
			BlockRate: 0.05,
			Ability:   &MonsterAbility{Name: "Pack Tactics", Phase: "any", ProcChance: 0.25, Effect: "advantage"},
			XPValue:   30,
			Notes:     "Nimble Escape; +1d4 if ally adjacent.",
		},
		"goblin_archer": {
			ID: "goblin_archer", Name: "Goblin Archer",
			CR: 0.25, HP: 7, AC: 13, Attack: 5, AttackBonus: 4, Speed: 14,
			BlockRate: 0.0,
			Ability:   &MonsterAbility{Name: "Scurry", Phase: "any", ProcChance: 0.30, Effect: "evade"},
			XPValue:   30,
			Notes:     "Ranged only. Disengages after attack.",
		},
		"hobgoblin_grunt": {
			ID: "hobgoblin_grunt", Name: "Hobgoblin Grunt",
			CR: 0.5, HP: 11, AC: 18, Attack: 9, AttackBonus: 3, Speed: 11,
			BlockRate: 0.10,
			Ability:   &MonsterAbility{Name: "Martial Advantage", Phase: "any", ProcChance: 0.30, Effect: "bonus_damage"},
			XPValue:   100,
			Notes:     "Pack-tactics variant. Formation bonus when grouped.",
		},
		"worg": {
			ID: "worg", Name: "Worg",
			CR: 0.5, HP: 26, AC: 13, Attack: 10, AttackBonus: 5, Speed: 17,
			BlockRate: 0.05,
			Ability:   &MonsterAbility{Name: "Knock Prone", Phase: "any", ProcChance: 0.25, Effect: "stun"},
			XPValue:   100,
			Notes:     "Carries goblin riders. STR DC 13 to avoid prone on hit.",
		},
		"goblin_shaman": {
			ID: "goblin_shaman", Name: "Goblin Shaman",
			CR: 1, HP: 22, AC: 11, Attack: 12, AttackBonus: 4, Speed: 12,
			BlockRate: 0.0,
			Ability:   &MonsterAbility{Name: "Burning Hands", Phase: "opening", ProcChance: 0.50, Effect: "aoe_fire"},
			XPValue:   200,
			Notes:     "Burning Hands 2d6 fire DEX DC 11; Healing Word on allies.",
		},
		"hobgoblin_warchief": {
			ID: "hobgoblin_warchief", Name: "Hobgoblin Warchief",
			CR: 2, HP: 52, AC: 18, Attack: 18, AttackBonus: 5, Speed: 11,
			BlockRate: 0.15,
			Ability:   &MonsterAbility{Name: "Leadership Aura", Phase: "any", ProcChance: 0.40, Effect: "ally_buff"},
			XPValue:   450,
			Notes:     "Elite. +1d4 to ally attacks; multiattack.",
		},
		"zombie": {
			ID: "zombie", Name: "Zombie",
			CR: 0.25, HP: 22, AC: 10, Attack: 5, AttackBonus: 3, Speed: 6,
			BlockRate: 0.0,
			Ability:   &MonsterAbility{Name: "Undead Fortitude", Phase: "decisive", ProcChance: 0.50, Effect: "survive_at_1"},
			XPValue:   50,
			Notes:     "CON DC 5 + damage dealt or survive at 1 HP. AC bumped 8→10 to satisfy engine min.",
		},
		"shadow": {
			ID: "shadow", Name: "Shadow",
			CR: 0.5, HP: 16, AC: 12, Attack: 9, AttackBonus: 4, Speed: 12,
			BlockRate: 0.0,
			Ability:   &MonsterAbility{Name: "Strength Drain", Phase: "any", ProcChance: 0.35, Effect: "stat_drain"},
			XPValue:   100,
			Notes:     "Hit reduces STR by 1d4 until long rest. Resist non-magical physical.",
		},
		"specter": {
			ID: "specter", Name: "Specter",
			CR: 1, HP: 22, AC: 12, Attack: 10, AttackBonus: 4, Speed: 14,
			BlockRate: 0.0,
			Ability:   &MonsterAbility{Name: "Life Drain", Phase: "any", ProcChance: 0.40, Effect: "lifesteal"},
			XPValue:   200,
			Notes:     "Incorporeal: non-magical weapons deal half damage.",
		},
		"wight": {
			ID: "wight", Name: "Wight",
			CR: 3, HP: 45, AC: 14, Attack: 14, AttackBonus: 4, Speed: 12,
			BlockRate: 0.10,
			Ability:   &MonsterAbility{Name: "Life Drain", Phase: "any", ProcChance: 0.45, Effect: "lifesteal"},
			XPValue:   700,
			Notes:     "Elite. Raises slain humanoids as zombies.",
		},
		"flameskull": {
			ID: "flameskull", Name: "Flameskull",
			CR: 4, HP: 40, AC: 13, Attack: 18, AttackBonus: 5, Speed: 15,
			BlockRate: 0.05,
			Ability:   &MonsterAbility{Name: "Fireball", Phase: "decisive", ProcChance: 0.55, Effect: "aoe_fire"},
			XPValue:   1100,
			Notes:     "Elite. Fireball 8d6 DEX DC 13. Rejuvenation in 1h unless holy water used.",
		},
		"boss_grol_unbroken": {
			ID: "boss_grol_unbroken", Name: "Grol the Unbroken",
			CR: 3, HP: 65, AC: 17, Attack: 22, AttackBonus: 5, Speed: 12,
			BlockRate: 0.15,
			Ability:   &MonsterAbility{Name: "Surprise Attack", Phase: "opening", ProcChance: 1.0, Effect: "bonus_damage"},
			XPValue:   700,
			Notes:     "Goblin Warrens boss. Bugbear war-chief.",
		},
		"boss_valdris_unburied": {
			ID: "boss_valdris_unburied", Name: "Valdris the Unburied",
			CR: 5, HP: 97, AC: 17, Attack: 28, AttackBonus: 7, Speed: 12,
			BlockRate: 0.10,
			Ability:   &MonsterAbility{Name: "Corrupting Touch", Phase: "any", ProcChance: 0.50, Effect: "max_hp_drain"},
			XPValue:   1800,
			Notes:     "Crypt of Valdris boss. Lich-aspirant; phase 2 below 50% HP.",
		},
	}
	for id, m := range tier1 {
		dndBestiary[id] = m
	}
	return true
}()

// dndBestiaryByCR returns templates whose CR is at or below the given cap.
// Useful for procedurally selecting a monster appropriate to player level.
func dndBestiaryByCR(maxCR float32) []DnDMonsterTemplate {
	var out []DnDMonsterTemplate
	for _, m := range dndBestiary {
		if m.CR <= maxCR {
			out = append(out, m)
		}
	}
	return out
}

// toCombatStats converts a bestiary entry into the engine's CombatStats +
// CombatModifiers shape. Future encounter content can use this to spawn
// named monsters in the existing combat pipeline.
func (m DnDMonsterTemplate) toCombatStats() (CombatStats, CombatModifiers) {
	stats := CombatStats{
		MaxHP:       m.HP,
		Attack:      m.Attack,
		Defense:     0,
		Speed:       m.Speed,
		BlockRate:   m.BlockRate,
		AC:          m.AC,
		AttackBonus: m.AttackBonus,
	}
	mods := CombatModifiers{DamageReduct: 1.0}
	return stats, mods
}