package casino

import "fmt"

// betRangeText describes the accepted wager range; the unlimited sentinel is
// rendered as "no maximum" instead of a machine-sized integer.
func betRangeText(minBet, maxBet int) string {
	if maxBet == maxBetUnlimited {
		return fmt.Sprintf("%d or more (no maximum)", minBet)
	}
	return fmt.Sprintf("between %d and %d", minBet, maxBet)
}

type GameName string

const (
	GameSlots     GameName = "slots"
	GameBlackjack GameName = "blackjack"
	GameBaccarat  GameName = "baccarat"
)

type BlackjackConfig struct {
	Decks                int     `yaml:"decks,omitempty"`
	ShuffleAt            float64 `yaml:"shuffle_at,omitempty"`
	BlackjackPayout      float64 `yaml:"blackjack_payout,omitempty"`
	DealerHitSoft17      *bool   `yaml:"dealer_hit_soft_17,omitempty"`
	MaxSplitHands        int     `yaml:"max_split_hands,omitempty"`
	ResplitAces          *bool   `yaml:"resplit_aces,omitempty"`
	DoubleAfterSplit     *bool   `yaml:"double_after_split,omitempty"`
	DoubleSplitBlackjack *bool   `yaml:"double_split_blackjack,omitempty"`
	InsurancePayout      float64 `yaml:"insurance_payout,omitempty"`
	Surrender            *bool   `yaml:"surrender,omitempty"`
	ActionTicks          int     `yaml:"action_ticks,omitempty"`
	SplitUnlikeTenValues *bool   `yaml:"split_unlike_ten_values,omitempty"`
}

func ruleBool(value *bool, defaultValue bool) bool {
	if value == nil {
		return defaultValue
	}
	return *value
}

func (c BlackjackConfig) DealerHitsSoft17() bool       { return ruleBool(c.DealerHitSoft17, false) }
func (c BlackjackConfig) AllowsResplitAces() bool      { return ruleBool(c.ResplitAces, false) }
func (c BlackjackConfig) AllowsDoubleAfterSplit() bool { return ruleBool(c.DoubleAfterSplit, true) }
func (c BlackjackConfig) CountsDoubleSplitBlackjack() bool {
	return ruleBool(c.DoubleSplitBlackjack, true)
}
func (c BlackjackConfig) AllowsSurrender() bool      { return ruleBool(c.Surrender, false) }
func (c BlackjackConfig) AllowsUnlikeTenSplit() bool { return ruleBool(c.SplitUnlikeTenValues, true) }

func (c BlackjackConfig) Normalize() BlackjackConfig {
	if c.Decks <= 0 {
		c.Decks = 8
	}
	if c.ShuffleAt <= 0 || c.ShuffleAt >= 1 {
		c.ShuffleAt = 0.25
	}
	if c.BlackjackPayout <= 0 {
		c.BlackjackPayout = 1.5
	}
	if c.MaxSplitHands <= 0 {
		c.MaxSplitHands = 4
	}
	if c.InsurancePayout <= 0 {
		c.InsurancePayout = 2
	}
	if c.ActionTicks <= 0 {
		c.ActionTicks = 20
	}
	return c
}

// BaccaratConfig holds punto banco house rules: shoe composition and payout
// multipliers. Banker wins pay BankerPayout:1 (a 5% commission game is 0.95);
// tie wins pay TiePayout:1.
type BaccaratConfig struct {
	Decks        int     `yaml:"decks,omitempty"`
	ShuffleAt    float64 `yaml:"shuffle_at,omitempty"`
	TiePayout    float64 `yaml:"tie_payout,omitempty"`
	BankerPayout float64 `yaml:"banker_payout,omitempty"`
}

func (c BaccaratConfig) Normalize() BaccaratConfig {
	if c.Decks <= 0 {
		c.Decks = 8
	}
	if c.ShuffleAt <= 0 || c.ShuffleAt >= 1 {
		c.ShuffleAt = 0.25
	}
	if c.TiePayout <= 0 {
		c.TiePayout = 8
	}
	if c.BankerPayout <= 0 {
		c.BankerPayout = 0.95
	}
	return c
}

type TableConfig struct {
	ID           string          `yaml:"id"`
	Game         GameName        `yaml:"game"`
	MaxPlayers   int             `yaml:"max_players,omitempty"`
	BettingTicks int             `yaml:"betting_ticks,omitempty"`
	MinBet       int             `yaml:"min_bet,omitempty"`
	MaxBet       int             `yaml:"max_bet,omitempty"`
	Blackjack    BlackjackConfig `yaml:"blackjack,omitempty"`
	Baccarat     BaccaratConfig  `yaml:"baccarat,omitempty"`
}

type MachineConfig struct {
	ID        string   `yaml:"id"`
	Game      GameName `yaml:"game"`
	Variant   string   `yaml:"variant,omitempty"`
	MinBet    int      `yaml:"min_bet,omitempty"`
	MaxBet    int      `yaml:"max_bet,omitempty"`
	SpinTicks int      `yaml:"spin_ticks,omitempty"`
	Payout    float64  `yaml:"payout,omitempty"`
}

func (c MachineConfig) Normalize() MachineConfig {
	if c.MinBet <= 0 {
		c.MinBet = 1
	}
	// An unset MaxBet defaults to the economy's bounded cap; the explicit
	// unlimited sentinel is still honored for authored configurations.
	if c.MaxBet <= 0 {
		c.MaxBet = DefaultMaxBet
	}
	if c.SpinTicks <= 0 {
		c.SpinTicks = 2
	}
	if c.Variant == "" {
		c.Variant = "huff_and_even_more_puff"
	}
	if c.Payout <= 0 {
		c.Payout = 0.97
	}
	return c
}

func (c TableConfig) Normalize() TableConfig {
	if c.MaxPlayers <= 0 {
		c.MaxPlayers = 8
	}
	if c.BettingTicks <= 0 {
		c.BettingTicks = 20
	}
	if c.MinBet <= 0 {
		c.MinBet = 1
	}
	if c.MaxBet <= 0 {
		c.MaxBet = DefaultMaxBet
	}
	return c
}

type Wager struct {
	Total   int
	Chips   int
	Credits int
}

type Wallet interface {
	// Wager debits the stake durably. ErrInsufficientFunds is a normal
	// rejected bet; ErrWalletPersistence means the debit could not be made
	// durable and the game must not proceed as if the bet succeeded.
	Wager(amount int) (Wager, error)
	// PayCredits pays a settlement durably, returning an error when the
	// credit could not be persisted (the game must not report a win that
	// is not durable).
	PayCredits(amount int) error
	// ResolveStakes marks every outstanding stake for this player as
	// settled: the round resolved (won, lost, pushed, or forfeited), so
	// startup recovery must no longer refund it. A stake whose wager
	// record remains open at restart is refunded by recovery.
	ResolveStakes()
	// RefundOutstanding returns every outstanding stake to the player
	// (chips as chips, credits through the durable payout path) and
	// resolves the stakes. It reports the amounts returned. An error
	// means the refund could not be made durable: the stakes remain open
	// and startup recovery completes the refund.
	RefundOutstanding() (chips, credits int, err error)
}

type EventType string

const (
	EventJoined       EventType = "joined"
	EventBetting      EventType = "betting"
	EventBetPlaced    EventType = "bet_placed"
	EventRoundStarted EventType = "round_started"
	EventResult       EventType = "result"
	EventPayout       EventType = "payout"
	EventTimedOut     EventType = "timed_out"
	EventLeft         EventType = "left"
	EventClosed       EventType = "closed"
)

type MenuKind string

const (
	MenuSlotCommands  MenuKind = "slot_commands"
	MenuBlackjackBet  MenuKind = "blackjack_bet"
	MenuBlackjackTurn MenuKind = "blackjack_turn"
	MenuBaccaratBet   MenuKind = "baccarat_bet"
)

// MenuView carries a structured menu alongside its plain-text Message so the
// presentation layer can enrich it (balances, command colors) without parsing
// message prefixes.
type MenuView struct {
	Kind     MenuKind
	Body     string        // command list (MenuSlotCommands)
	Title    string        // prompt heading (MenuBlackjackTurn)
	Actions  []string      // available commands (MenuBlackjackTurn)
	Commands []MenuCommand // unified command list for all casino menus
}

// MenuCommand is one selectable command shown in a casino menu: the typed
// command text plus a short human-readable description.
type MenuCommand struct {
	Command string
	Desc    string
}

type Event struct {
	RoomID         int
	TableID        string
	Type           EventType
	Player         string
	Message        string
	PrivateMessage string
	PrivateTo      string
	Color          string
	Public         bool
	Slot           *SlotSnapshot
	Blackjack      *BlackjackSnapshot
	Baccarat       *BaccaratSnapshot
	Menu           *MenuView
}

type SlotSnapshot struct {
	Grid         [3][5]string
	StoppedReels int
}

// CardView renders one card for any card-based table game.
type CardView struct {
	Rank   string
	Suit   string
	Hidden bool
}

type BlackjackPlayerView struct {
	Name  string
	Cards []CardView
	Score string
}

type BlackjackSnapshot struct {
	Dealer           []CardView
	DealerShownScore string
	DealerScore      string
	DealerRevealed   bool
	Players          []BlackjackPlayerView
}

// BaccaratBetView lists one participant's wager on a baccarat outcome.
type BaccaratBetView struct {
	Name   string
	Spot   string
	Amount int
}

type BaccaratSnapshot struct {
	Player      []CardView
	Banker      []CardView
	PlayerScore string
	BankerScore string
	Bets        []BaccaratBetView
}

type Participant struct {
	Name      string
	Connected bool
	HasBet    bool
	Wager     Wager
	Wallet    Wallet
}