//
//  RoadMapView.swift
//  Baccarat
//
//  A visual history display of recent game results (Big Road style).
//

import SwiftUI
import CasinoKit

/// A simple road display showing recent results.
struct RoadMapView: View {
    let results: [RoundResult]
    
    // MARK: - Scaled Fonts (Dynamic Type)
    
    @ScaledMetric(relativeTo: .caption2) private var historyFontSize: CGFloat = Design.BaseFontSize.small
    @ScaledMetric(relativeTo: .caption2) private var dotSize: CGFloat = 22
    
    // MARK: - Accessibility
    
    private var historySummary: String {
        if results.isEmpty {
            return String(localized: "No history yet")
        }
        
        let playerWins = results.filter { $0.result == .playerWins }.count
        let bankerWins = results.filter { $0.result == .bankerWins }.count
        let ties = results.filter { $0.result == .tie }.count
        
        let format = String(localized: "historySummaryFormat")
        return String(format: format, results.count, playerWins, bankerWins, ties)
    }
    
    var body: some View {
        VStack(alignment: .leading, spacing: Design.Spacing.xSmall) {
            Text("HISTORY")
                .font(.system(size: historyFontSize, weight: .bold, design: .rounded))
                .foregroundStyle(.white.opacity(Design.Opacity.accent))
                .tracking(1)
            
            ScrollView(.horizontal) {
                HStack(spacing: Design.Spacing.xSmall) {
                    ForEach(results) { result in
                        RoadDot(
                            result: result.result,
                            dotSize: dotSize,
                            hasPair: result.hasPair,
                            isNatural: result.isNatural
                        )
                    }
                }
                .padding(.vertical, Design.Spacing.xSmall)
            }
            .scrollIndicators(.hidden)
        }
        .padding(.horizontal, Design.Spacing.medium)
        .padding(.vertical, Design.Spacing.small)
        .background(
            RoundedRectangle(cornerRadius: Design.CornerRadius.small)
                .fill(Color.black.opacity(Design.Opacity.light))
        )
        .accessibilityElement(children: .ignore)
        .accessibilityLabel(String(localized: "Game history"))
        .accessibilityValue(historySummary)
    }
}

/// A single dot in the road display.
struct RoadDot: View {
    let result: GameResult
    let dotSize: CGFloat
    var hasPair: Bool = false
    var isNatural: Bool = false
    
    // MARK: - Layout Constants
    
    private var markerSize: CGFloat { dotSize * 0.3 }
    
    // MARK: - Scaled Fonts (Dynamic Type)
    
    @ScaledMetric(relativeTo: .caption2) private var labelFontSize: CGFloat = Design.BaseFontSize.small
    
    private var color: Color {
        switch result {
        case .playerWins: return .blue
        case .bankerWins: return .red
        case .tie: return .green
        }
    }
    
    private var label: String {
        switch result {
        case .playerWins: return "P"
        case .bankerWins: return "B"
        case .tie: return "T"
        }
    }
    
    var body: some View {
        ZStack {
            Circle()
                .fill(color)
                .frame(width: dotSize, height: dotSize)
            
            Circle()
                .strokeBorder(Color.white.opacity(Design.Opacity.light), lineWidth: Design.LineWidth.thin)
                .frame(width: dotSize, height: dotSize)
            
            Text(label)
                .font(.system(size: labelFontSize, weight: .bold))
                .foregroundStyle(.white)
            
            // Pair marker (bottom-left corner)
            if hasPair {
                Circle()
                    .fill(Color.yellow)
                    .frame(width: markerSize, height: markerSize)
                    .overlay(
                        Circle()
                            .strokeBorder(Color.white, lineWidth: Design.LineWidth.thin)
                    )
                    .offset(x: -dotSize * 0.35, y: dotSize * 0.35)
            }
            
            // Natural marker (top-right corner - star shape)
            if isNatural {
                Image(systemName: "star.fill")
                    .font(.system(size: markerSize))
                    .foregroundStyle(.yellow)
                    .offset(x: dotSize * 0.35, y: -dotSize * 0.35)
            }
        }
    }
}

#Preview {
    ZStack {
        Color.Table.preview
            .ignoresSafeArea()
        
        RoadMapView(results: [
            RoundResult(result: .playerWins, playerValue: 8, bankerValue: 6, playerPair: true),
            RoundResult(result: .bankerWins, playerValue: 4, bankerValue: 7),
            RoundResult(result: .tie, playerValue: 5, bankerValue: 5, bankerPair: true),
            RoundResult(result: .playerWins, playerValue: 9, bankerValue: 3),
            RoundResult(result: .bankerWins, playerValue: 2, bankerValue: 8, playerPair: true, bankerPair: true)
        ])
        .padding()
    }
}