//
//  MiniBaccaratTableView.swift
//  Baccarat
//
//  A realistic mini baccarat table layout for single player.
//

import SwiftUI

/// The semi-circular mini baccarat betting table layout.
struct MiniBaccaratTableView: View {
    @Bindable var gameState: GameState
    let selectedChip: ChipDenomination
    
    // MARK: - Layout Constants
    
    private let tableLimitsFontSize = Design.FontSize.small
    private let tieZoneHeight: CGFloat = 55
    private let mainZoneHeight: CGFloat = 60
    private let tieHorizontalPadding: CGFloat = 50
    private let bankerHorizontalPadding: CGFloat = 30
    private let playerHorizontalPadding: CGFloat = 20
    private let zoneTopPadding = Design.Spacing.medium
    private let zoneBottomPadding = Design.Spacing.medium
    private let minSpacerLength = Design.Spacing.small
    
    // MARK: - Computed Properties
    
    private func betAmount(for type: BetType) -> Int {
        gameState.betAmount(for: type)
    }
    
    private func canAddBet(for type: BetType) -> Bool {
        gameState.canPlaceBet && 
        gameState.balance >= selectedChip.rawValue &&
        gameState.canAddToBet(type: type, amount: selectedChip.rawValue)
    }
    
    private func isAtMax(for type: BetType) -> Bool {
        betAmount(for: type) >= gameState.maxBet
    }
    
    private var isPlayerSelected: Bool {
        gameState.mainBet?.type == .player
    }
    
    private var isBankerSelected: Bool {
        gameState.mainBet?.type == .banker
    }
    
    private var tableLimitsText: String {
        String.localized(
            "tableLimitsFormat",
            gameState.minBet.formatted(),
            gameState.maxBet.formatted()
        )
    }
    
    // MARK: - Body
    
    var body: some View {
        VStack(spacing: Design.Spacing.xSmall) {
            // Table limits label
            Text(tableLimitsText)
                .font(.system(size: tableLimitsFontSize, weight: .bold, design: .rounded))
                .foregroundStyle(.white.opacity(Design.Opacity.medium))
                .tracking(1)
            
            ZStack {
                // Table felt background with arc shape
                TableFeltShape()
                    .fill(
                        LinearGradient(
                            colors: [Color.Table.feltLight, Color.Table.feltDark],
                            startPoint: .top,
                            endPoint: .bottom
                        )
                    )
                
                // Gold border
                TableFeltShape()
                    .strokeBorder(
                        LinearGradient(
                            colors: [Color.Border.goldLight, Color.Border.goldDark],
                            startPoint: .top,
                            endPoint: .bottom
                        ),
                        lineWidth: Design.LineWidth.heavy
                    )
                
                // Betting zones layout
                VStack(spacing: 0) {
                    // TIE zone at top
                    TieBettingZone(
                        betAmount: betAmount(for: .tie),
                        isEnabled: canAddBet(for: .tie),
                        isAtMax: isAtMax(for: .tie)
                    ) {
                        gameState.placeBet(type: .tie, amount: selectedChip.rawValue)
                    }
                    .frame(height: tieZoneHeight)
                    .padding(.horizontal, tieHorizontalPadding)
                    .padding(.top, zoneTopPadding)
                    
                    Spacer(minLength: minSpacerLength)
                    
                    // BANKER zone in middle
                    BankerBettingZone(
                        betAmount: betAmount(for: .banker),
                        isSelected: isBankerSelected,
                        isEnabled: canAddBet(for: .banker),
                        isAtMax: isAtMax(for: .banker)
                    ) {
                        gameState.placeBet(type: .banker, amount: selectedChip.rawValue)
                    }
                    .frame(height: mainZoneHeight)
                    .padding(.horizontal, bankerHorizontalPadding)
                
                    Spacer(minLength: minSpacerLength)
                    
                    // PLAYER zone at bottom
                    PlayerBettingZone(
                        betAmount: betAmount(for: .player),
                        isSelected: isPlayerSelected,
                        isEnabled: canAddBet(for: .player),
                        isAtMax: isAtMax(for: .player)
                    ) {
                        gameState.placeBet(type: .player, amount: selectedChip.rawValue)
                    }
                    .frame(height: mainZoneHeight)
                    .padding(.horizontal, playerHorizontalPadding)
                    .padding(.bottom, zoneBottomPadding)
                }
            }
            .aspectRatio(Design.Size.tableAspectRatio, contentMode: .fit)
        }
    }
}

/// Custom shape for the mini baccarat table felt.
struct TableFeltShape: InsettableShape {
    var insetAmount: CGFloat = 0
    
    private let shapeCornerRadius = Design.CornerRadius.xxLarge
    
    func path(in rect: CGRect) -> Path {
        var path = Path()
        
        let insetRect = rect.insetBy(dx: insetAmount, dy: insetAmount)
        let height = insetRect.height
        let cornerRadius = shapeCornerRadius
        
        // Start from bottom left
        path.move(to: CGPoint(x: insetRect.minX + cornerRadius, y: insetRect.maxY))
        
        // Bottom edge
        path.addLine(to: CGPoint(x: insetRect.maxX - cornerRadius, y: insetRect.maxY))
        
        // Bottom right corner
        path.addQuadCurve(
            to: CGPoint(x: insetRect.maxX, y: insetRect.maxY - cornerRadius),
            control: CGPoint(x: insetRect.maxX, y: insetRect.maxY)
        )
        
        // Right edge going up with curve
        path.addLine(to: CGPoint(x: insetRect.maxX, y: insetRect.minY + height * 0.3))
        
        // Top arc
        path.addQuadCurve(
            to: CGPoint(x: insetRect.minX, y: insetRect.minY + height * 0.3),
            control: CGPoint(x: insetRect.midX, y: insetRect.minY - height * 0.1)
        )
        
        // Left edge going down
        path.addLine(to: CGPoint(x: insetRect.minX, y: insetRect.maxY - cornerRadius))
        
        // Bottom left corner
        path.addQuadCurve(
            to: CGPoint(x: insetRect.minX + cornerRadius, y: insetRect.maxY),
            control: CGPoint(x: insetRect.minX, y: insetRect.maxY)
        )
        
        path.closeSubpath()
        return path
    }
    
    func inset(by amount: CGFloat) -> some InsettableShape {
        var shape = self
        shape.insetAmount += amount
        return shape
    }
}

/// The TIE betting zone at the top of the table.
struct TieBettingZone: View {
    let betAmount: Int
    let isEnabled: Bool
    var isAtMax: Bool = false
    let action: () -> Void
    
    // MARK: - Layout Constants
    
    private let cornerRadius = Design.CornerRadius.small
    private let titleFontSize = Design.FontSize.medium
    private let subtitleFontSize = Design.FontSize.xSmall
    private let chipTrailingPadding = Design.Spacing.small
    
    // MARK: - Computed Properties
    
    private var backgroundColor: Color {
        isAtMax ? Color.BettingZone.tieMax : Color.BettingZone.tie
    }
    
    private var borderColor: Color {
        isAtMax ? Color.Border.silver : Color.Border.gold
    }
    
    // MARK: - Body
    
    var body: some View {
        Button {
            if isEnabled {
                action()
            }
        } label: {
            ZStack {
                // Background
                RoundedRectangle(cornerRadius: cornerRadius)
                    .fill(backgroundColor)
                
                // Border
                RoundedRectangle(cornerRadius: cornerRadius)
                    .strokeBorder(borderColor, lineWidth: Design.LineWidth.medium)
                
                // Centered text content
                VStack(spacing: Design.Spacing.xxSmall) {
                    Text("TIE")
                        .font(.system(size: titleFontSize, weight: .black, design: .rounded))
                        .tracking(2)
                    
                    Text("PAYS 8 TO 1")
                        .font(.system(size: subtitleFontSize, weight: .medium))
                        .opacity(Design.Opacity.heavy)
                }
                .foregroundStyle(.white)
            }
            // Chip overlaid on right side
            .overlay(alignment: .trailing) {
                if betAmount > 0 {
                    ChipOnTable(amount: betAmount, showMax: isAtMax)
                        .padding(.trailing, chipTrailingPadding)
                }
            }
        }
        .buttonStyle(.plain)
    }
}

/// The BANKER betting zone in the middle of the table.
struct BankerBettingZone: View {
    let betAmount: Int
    let isSelected: Bool
    let isEnabled: Bool
    var isAtMax: Bool = false
    let action: () -> Void
    
    // MARK: - Layout Constants
    
    private let cornerRadius = Design.CornerRadius.medium
    private let titleFontSize = Design.FontSize.large
    private let subtitleFontSize = Design.FontSize.xSmall
    private let chipTrailingPadding = Design.Spacing.medium
    private let selectionShadowRadius = Design.Shadow.radiusSmall
    
    // MARK: - Computed Properties
    
    private var backgroundColors: [Color] {
        isAtMax
            ? [Color.BettingZone.bankerMaxLight, Color.BettingZone.bankerMaxDark]
            : [Color.BettingZone.bankerLight, Color.BettingZone.bankerDark]
    }
    
    private var borderColor: Color {
        isAtMax ? Color.Border.silver : Color.Border.gold
    }
    
    // MARK: - Body
    
    var body: some View {
        Button {
            if isEnabled {
                action()
            }
        } label: {
            ZStack {
                // Background
                RoundedRectangle(cornerRadius: cornerRadius)
                    .fill(
                        LinearGradient(
                            colors: backgroundColors,
                            startPoint: .top,
                            endPoint: .bottom
                        )
                    )
                
                // Selection glow
                if isSelected {
                    RoundedRectangle(cornerRadius: cornerRadius)
                        .strokeBorder(Color.yellow, lineWidth: Design.LineWidth.thick)
                        .shadow(color: .yellow.opacity(Design.Opacity.medium), radius: selectionShadowRadius)
                }
                
                // Border
                RoundedRectangle(cornerRadius: cornerRadius)
                    .strokeBorder(borderColor, lineWidth: Design.LineWidth.medium)
                
                // Centered text content
                VStack(spacing: Design.Spacing.xxSmall) {
                    Text("BANKER")
                        .font(.system(size: titleFontSize, weight: .black, design: .rounded))
                        .tracking(3)
                    
                    Text("PAYS 0.95 TO 1")
                        .font(.system(size: subtitleFontSize, weight: .medium))
                        .opacity(Design.Opacity.heavy)
                }
                .foregroundStyle(.white)
            }
            // Chip overlaid on right side
            .overlay(alignment: .trailing) {
                if betAmount > 0 {
                    ChipOnTable(amount: betAmount, showMax: isAtMax)
                        .padding(.trailing, chipTrailingPadding)
                }
            }
        }
        .buttonStyle(.plain)
    }
}

/// The PLAYER betting zone at the bottom of the table.
struct PlayerBettingZone: View {
    let betAmount: Int
    let isSelected: Bool
    let isEnabled: Bool
    var isAtMax: Bool = false
    let action: () -> Void
    
    // MARK: - Layout Constants
    
    private let cornerRadius = Design.CornerRadius.medium
    private let titleFontSize = Design.FontSize.large
    private let subtitleFontSize = Design.FontSize.xSmall
    private let chipTrailingPadding = Design.Spacing.medium
    private let selectionShadowRadius = Design.Shadow.radiusSmall
    
    // MARK: - Computed Properties
    
    private var backgroundColors: [Color] {
        isAtMax
            ? [Color.BettingZone.playerMaxLight, Color.BettingZone.playerMaxDark]
            : [Color.BettingZone.playerLight, Color.BettingZone.playerDark]
    }
    
    private var borderColor: Color {
        isAtMax ? Color.Border.silver : Color.Border.gold
    }
    
    // MARK: - Body
    
    var body: some View {
        Button {
            if isEnabled {
                action()
            }
        } label: {
            ZStack {
                // Background
                RoundedRectangle(cornerRadius: cornerRadius)
                    .fill(
                        LinearGradient(
                            colors: backgroundColors,
                            startPoint: .top,
                            endPoint: .bottom
                        )
                    )
                
                // Selection glow
                if isSelected {
                    RoundedRectangle(cornerRadius: cornerRadius)
                        .strokeBorder(Color.yellow, lineWidth: Design.LineWidth.thick)
                        .shadow(color: .yellow.opacity(Design.Opacity.medium), radius: selectionShadowRadius)
                }
                
                // Border
                RoundedRectangle(cornerRadius: cornerRadius)
                    .strokeBorder(borderColor, lineWidth: Design.LineWidth.medium)
                
                // Centered text content
                VStack(spacing: Design.Spacing.xxSmall) {
                    Text("PLAYER")
                        .font(.system(size: titleFontSize, weight: .black, design: .rounded))
                        .tracking(3)
                    
                    Text("PAYS 1 TO 1")
                        .font(.system(size: subtitleFontSize, weight: .medium))
                        .opacity(Design.Opacity.heavy)
                }
                .foregroundStyle(.white)
            }
            // Chip overlaid on right side
            .overlay(alignment: .trailing) {
                if betAmount > 0 {
                    ChipOnTable(amount: betAmount, showMax: isAtMax)
                        .padding(.trailing, chipTrailingPadding)
                }
            }
        }
        .buttonStyle(.plain)
    }
}

/// A chip displayed on the table showing bet amount.
struct ChipOnTable: View {
    let amount: Int
    var showMax: Bool = false
    
    // MARK: - Layout Constants
    
    private let chipSize = Design.Size.chipSmall
    private let innerRingSize: CGFloat = 26
    private let gradientEndRadius: CGFloat = 20
    private let maxBadgeFontSize = Design.FontSize.xxSmall
    private let maxBadgeOffsetX: CGFloat = 6
    private let maxBadgeOffsetY: CGFloat = -4
    
    // MARK: - Computed Properties
    
    private var chipColor: Color {
        switch amount {
        case 0..<50: return .blue
        case 50..<100: return .orange
        case 100..<500: return .black
        case 500..<1000: return .purple
        default: return Color.Chip.gold
        }
    }
    
    private var displayText: String {
        amount >= 1000 ? "\(amount / 1000)K" : "\(amount)"
    }
    
    private var textFontSize: CGFloat {
        amount >= 1000 ? Design.FontSize.small : 11
    }
    
    // MARK: - Body
    
    var body: some View {
        ZStack {
            Circle()
                .fill(
                    RadialGradient(
                        colors: [chipColor.opacity(0.9), chipColor],
                        center: .topLeading,
                        startRadius: 0,
                        endRadius: gradientEndRadius
                    )
                )
                .frame(width: chipSize, height: chipSize)
            
            Circle()
                .strokeBorder(Color.white.opacity(Design.Opacity.heavy), lineWidth: Design.LineWidth.medium)
                .frame(width: chipSize, height: chipSize)
            
            Circle()
                .strokeBorder(Color.white.opacity(Design.Opacity.light), lineWidth: Design.LineWidth.thin)
                .frame(width: innerRingSize, height: innerRingSize)
            
            Text(displayText)
                .font(.system(size: textFontSize, weight: .bold))
                .foregroundStyle(.white)
        }
        .shadow(color: .black.opacity(Design.Opacity.light), radius: Design.Shadow.radiusSmall, x: 1, y: 2)
        .overlay(alignment: .topTrailing) {
            if showMax {
                Text("MAX")
                    .font(.system(size: maxBadgeFontSize, weight: .black))
                    .foregroundStyle(.white)
                    .padding(.horizontal, Design.Spacing.xSmall)
                    .padding(.vertical, Design.Spacing.xxSmall)
                    .background(
                        Capsule()
                            .fill(Color.red)
                    )
                    .offset(x: maxBadgeOffsetX, y: maxBadgeOffsetY)
            }
        }
    }
}

#Preview {
    ZStack {
        Color.Table.baseDark
            .ignoresSafeArea()
        
        MiniBaccaratTableView(
            gameState: GameState(),
            selectedChip: .hundred
        )
        .padding()
    }
}