//
//  BettingZoneView.swift
//  Blackjack
//
//  The betting area where players place their bets.
//

import SwiftUI
import CasinoKit

/// Main betting zone view - adapts layout based on whether side bets are enabled.
/// Follows Baccarat's betting pattern exactly.
struct BettingZoneView: View {
    @Bindable var state: GameState
    let selectedChip: ChipDenomination
    
    @ScaledMetric(relativeTo: .headline) private var labelFontSize: CGFloat = Design.Size.handLabelFontSize
    @ScaledMetric(relativeTo: .caption) private var detailFontSize: CGFloat = Design.Size.handNumberFontSize
    @ScaledMetric(relativeTo: .body) private var chipSize: CGFloat = Design.Size.bettingChipSize
    @ScaledMetric(relativeTo: .body) private var zoneHeight: CGFloat = CasinoDesign.Size.bettingZoneHeight
    
    // MARK: - Computed Properties (matches Baccarat's pattern)
    
    /// Whether a bet can be added to main bet (matches Baccarat's canAddBet)
    private var canAddMainBet: Bool {
        state.canPlaceBet &&
        state.balance >= selectedChip.rawValue &&
        state.canAddToMainBet(amount: selectedChip.rawValue)
    }
    
    /// Whether a bet can be added to Perfect Pairs
    private var canAddPerfectPairs: Bool {
        state.canPlaceBet &&
        state.balance >= selectedChip.rawValue &&
        state.canAddToSideBet(type: .perfectPairs, amount: selectedChip.rawValue)
    }
    
    /// Whether a bet can be added to 21+3
    private var canAddTwentyOnePlusThree: Bool {
        state.canPlaceBet &&
        state.balance >= selectedChip.rawValue &&
        state.canAddToSideBet(type: .twentyOnePlusThree, amount: selectedChip.rawValue)
    }
    
    private var isMainAtMax: Bool {
        state.currentBet >= state.settings.maxBet
    }
    
    private var isPPAtMax: Bool {
        state.perfectPairsBet >= state.settings.maxBet
    }
    
    private var is21PlusThreeAtMax: Bool {
        state.twentyOnePlusThreeBet >= state.settings.maxBet
    }
    
    var body: some View {
        if state.settings.sideBetsEnabled {
            // Horizontal layout: PP | Main Bet | 21+3
            HStack(spacing: Design.Spacing.small) {
                // Perfect Pairs
                SideBetZoneView(
                    betType: .perfectPairs,
                    betAmount: state.perfectPairsBet,
                    isEnabled: canAddPerfectPairs,
                    isAtMax: isPPAtMax,
                    onTap: { state.placeSideBet(type: .perfectPairs, amount: selectedChip.rawValue) }
                )
                .frame(width: Design.Size.sideBetZoneWidth)
                
                // Main bet (center, takes remaining space)
                mainBetZone
                
                // 21+3
                SideBetZoneView(
                    betType: .twentyOnePlusThree,
                    betAmount: state.twentyOnePlusThreeBet,
                    isEnabled: canAddTwentyOnePlusThree,
                    isAtMax: is21PlusThreeAtMax,
                    onTap: { state.placeSideBet(type: .twentyOnePlusThree, amount: selectedChip.rawValue) }
                )
                .frame(width: Design.Size.sideBetZoneWidth)
            }
            .frame(height: zoneHeight)
        } else {
            // Simple layout: just main bet
            mainBetZone
                .frame(height: zoneHeight)
        }
    }
    
    private var mainBetZone: some View {
        Button {
            if canAddMainBet {
                state.placeBet(amount: selectedChip.rawValue)
            }
        } label: {
            ZStack {
                // Background
                RoundedRectangle(cornerRadius: Design.CornerRadius.large)
                    .fill(Color.BettingZone.main)
                    .overlay(
                        RoundedRectangle(cornerRadius: Design.CornerRadius.large)
                            .strokeBorder(Color.BettingZone.mainBorder, lineWidth: Design.LineWidth.medium)
                    )
                
                // Content
                if state.currentBet > 0 {
                    // Show chip with amount (scaled)
                    ChipOnTableView(amount: state.currentBet, showMax: isMainAtMax, size: chipSize)
                } else {
                    // Empty state
                    VStack(spacing: Design.Spacing.small) {
                        Text(String(localized: "TAP TO BET"))
                            .font(.system(size: labelFontSize, weight: .bold))
                            .foregroundStyle(.white.opacity(Design.Opacity.medium))
                        
                        HStack(spacing: Design.Spacing.medium) {
                            Text(String(localized: "Min: $\(state.settings.minBet)"))
                                .font(.system(size: detailFontSize, weight: .medium))
                                .foregroundStyle(.white.opacity(Design.Opacity.light))
                            
                            Text(String(localized: "Max: $\(state.settings.maxBet.formatted())"))
                                .font(.system(size: detailFontSize, weight: .medium))
                                .foregroundStyle(.white.opacity(Design.Opacity.light))
                        }
                    }
                }
            }
            .frame(maxWidth: .infinity)
        }
        .buttonStyle(.plain)
        .accessibilityLabel(state.currentBet > 0 ? "$\(state.currentBet) bet" + (isMainAtMax ? ", maximum" : "") : "Place bet")
        .accessibilityHint("Double tap to add chips")
    }
}

// MARK: - Design Constants Extension

extension Design.Size {
    /// Width of side bet zones
    static let sideBetZoneWidth: CGFloat = 70
}

// MARK: - Previews

#Preview("Empty - No Side Bets") {
    ZStack {
        Color.Table.felt.ignoresSafeArea()
        BettingZoneView(
            state: GameState(settings: GameSettings()),
            selectedChip: .hundred
        )
        .padding()
    }
}

#Preview("With Side Bets") {
    ZStack {
        Color.Table.felt.ignoresSafeArea()
        BettingZoneView(
            state: {
                let settings = GameSettings()
                settings.sideBetsEnabled = true
                let state = GameState(settings: settings)
                state.placeBet(amount: 100)
                return state
            }(),
            selectedChip: .twentyFive
        )
        .padding()
    }
}

#Preview("All Bets Placed") {
    ZStack {
        Color.Table.felt.ignoresSafeArea()
        BettingZoneView(
            state: {
                let settings = GameSettings()
                settings.sideBetsEnabled = true
                let state = GameState(settings: settings)
                state.placeBet(amount: 250)
                state.placeSideBet(type: .perfectPairs, amount: 25)
                state.placeSideBet(type: .twentyOnePlusThree, amount: 50)
                return state
            }(),
            selectedChip: .hundred
        )
        .padding()
    }
}