package web

import (
	"net/http"
	"time"

	"pete/internal/games/blackjack"
	"pete/internal/storage"
)

// The casino's two pages. Both require a signed-in visitor — there is money in
// here, and a player has to be somebody gogobee's ledger can name.
//
// Neither page renders any game state server-side. The felt is drawn by the
// browser from /api/games/table, because a hand is a thing that *happens*: cards
// are dealt one at a time and the table plays that back. A server-rendered hand
// would arrive fully formed, which is the one thing a card table must never do.

// gameTeaser is a table that isn't open yet. They're on the lobby because an
// empty casino with one game reads as broken, and this reads as early.
type gameTeaser struct {
	Name  string
	Emoji string
	Blurb string
}

var comingSoon = []gameTeaser{
	{Name: "Hold'em", Emoji: "♠️", Blurb: "Six seats, and the house bots know how to play."},
	{Name: "UNO", Emoji: "🎴", Blurb: "Normal rules, or no mercy."},
	{Name: "Trivia", Emoji: "🧠", Blurb: "Faster answers score higher."},
	{Name: "Hangman", Emoji: "🪢", Blurb: "Guess the phrase before the gallows finish."},
}

// betDenominations are the chips you build a bet out of.
var betDenominations = []int64{5, 25, 100, 500}

// The casino is not called Pete — the news app is Pete's, and this is somewhere
// you go. It has two names, and which one is over the door depends on the hour:
// the lights come on at six and the place turns into Casino Night Zone until
// dawn. Same tables, different room.
type room struct {
	Slug string // drives the palette: html[data-room="…"]
	Name string // what's on the sign
}

var (
	roomDay   = room{Slug: "casinopolis", Name: "Casinopolis"}
	roomNight = room{Slug: "casino-night", Name: "Casino Night Zone"}
)

// roomAt picks the room for an hour of the day. Daylight is 6am to 6pm; the rest
// belongs to the neon. The browser re-runs this same rule against its own clock
// (games_layout.html), so a player in another timezone sees their own evening —
// this server-side pick only exists so the first paint isn't the wrong room.
func roomAt(hour int) room {
	if hour >= 6 && hour < 18 {
		return roomDay
	}
	return roomNight
}

// gamesPage is deliberately *not* pageData. The casino shares Pete's design
// language and nothing else — no channels, no weather, no sources, no push.
// Giving it its own page struct is what stops the news app's furniture drifting
// back in one convenient field at a time.
type gamesPage struct {
	Room          room
	User          *SessionUser
	Cap           int64
	RakePct       int
	Soon          []gameTeaser
	Denominations []int64
}

// requirePlayer sends an anonymous visitor to sign in and comes back here after.
// Anyone who is signed in but carries a session from before the casino existed
// has no username in it, so they get sent through sign-in too — which mints one.
func (s *Server) requirePlayer(w http.ResponseWriter, r *http.Request) bool {
	if !s.gamesReady() {
		http.NotFound(w, r)
		return false
	}
	u := s.auth.userFromRequest(r)
	if u != nil && u.MatrixUser(s.cfg.Games.MatrixServer) != "" {
		return true
	}
	http.Redirect(w, r, "/auth/login?next="+r.URL.Path, http.StatusFound)
	return false
}

func (s *Server) gamesPage(r *http.Request) gamesPage {
	return gamesPage{
		Room:          roomAt(time.Now().Hour()),
		User:          s.auth.userFromRequest(r), // requirePlayer ran first, so this is non-nil
		Cap:           storage.MaxChipsOnTable,
		RakePct:       int(blackjack.DefaultRules().RakePct * 100),
		Soon:          comingSoon,
		Denominations: betDenominations,
	}
}

func (s *Server) handleLobby(w http.ResponseWriter, r *http.Request) {
	if !s.requirePlayer(w, r) {
		return
	}
	s.render(w, "games", s.gamesPage(r))
}

func (s *Server) handleBlackjack(w http.ResponseWriter, r *http.Request) {
	if !s.requirePlayer(w, r) {
		return
	}
	s.render(w, "blackjack", s.gamesPage(r))
}