//
//  ActionButtonsView.swift
//  Blackjack
//
//  Container for game action buttons (betting, player turn).
//

import SwiftUI
import CasinoKit

struct ActionButtonsView: View {
    @Bindable var state: GameState
    
    // Scaled metrics
    @ScaledMetric(relativeTo: .headline) private var buttonFontSize: CGFloat = Design.BaseFontSize.large
    @ScaledMetric(relativeTo: .body) private var iconSize: CGFloat = Design.IconSize.large
    
    // Scaled container height - base 60pt, scales with accessibility
    @ScaledMetric(relativeTo: .body) private var containerHeight: CGFloat = 60
    
    var body: some View {
        VStack(spacing: Design.Spacing.small) {
            // Primary actions
            HStack(spacing: Design.Spacing.medium) {
                switch state.currentPhase {
                case .betting:
                    bettingButtons
                case .playerTurn:
                    playerTurnButtons
                case .roundComplete:
                    // Empty - handled by result banner
                    EmptyView()
                default:
                    // Dealing, dealer turn - show nothing
                    EmptyView()
                }
            }
            .animation(.spring(duration: Design.Animation.quick), value: state.currentPhase)
        }
        .frame(minHeight: containerHeight)
        .padding(.horizontal, Design.Spacing.large)
    }
    
    // MARK: - Betting Phase Buttons
    
    @ViewBuilder
    private var bettingButtons: some View {
        if state.currentBet > 0 {
            VStack(spacing: Design.Spacing.small) {
                // Show hint if bet is below minimum
                if state.isBetBelowMinimum {
                    Text(String(localized: "Add $\(state.amountNeededForMinimum) more to meet minimum"))
                        .font(.system(size: Design.BaseFontSize.small, weight: .medium))
                        .foregroundStyle(.orange)
                        .transition(.opacity)
                }
                
                HStack(spacing: Design.Spacing.medium) {
                    ActionButton(
                        String(localized: "Clear"),
                        icon: "xmark.circle",
                        style: .destructive
                    ) {
                        state.clearBet()
                    }
                    
                    // Always show Deal button, but disable if below minimum
                    ActionButton(
                        String(localized: "Deal"),
                        icon: "play.fill",
                        style: .primary
                    ) {
                        Task { await state.deal() }
                    }
                    .opacity(state.canDeal ? 1.0 : Design.Opacity.medium)
                    .disabled(!state.canDeal)
                }
            }
        }
    }
    
    // MARK: - Player Turn Buttons
    
    @ViewBuilder
    private var playerTurnButtons: some View {
        // All player actions in a single row
        HStack(spacing: Design.Spacing.medium) {
            if state.canHit {
                ActionButton(
                    String(localized: "Hit"),
                    style: .custom(Color.Button.hit)
                ) {
                    Task { await state.hit() }
                }
            }
            
            if state.canStand {
                ActionButton(
                    String(localized: "Stand"),
                    style: .custom(Color.Button.stand)
                ) {
                    Task { await state.stand() }
                }
            }
            
            if state.canDouble {
                ActionButton(
                    String(localized: "Double"),
                    style: .custom(Color.Button.doubleDown)
                ) {
                    Task { await state.doubleDown() }
                }
            }
            
            if state.canSplit {
                ActionButton(
                    String(localized: "Split"),
                    style: .custom(Color.Button.split)
                ) {
                    Task { await state.split() }
                }
            }
            
            if state.canSurrender {
                ActionButton(
                    String(localized: "Surrender"),
                    style: .custom(Color.Button.surrender)
                ) {
                    Task { await state.surrender() }
                }
            }
        }
    }
}

// MARK: - Previews

#Preview("Betting Phase - No Bet") {
    ZStack {
        Color.Table.felt.ignoresSafeArea()
        ActionButtonsView(state: {
            let state = GameState(settings: GameSettings())
            return state
        }())
    }
}

#Preview("Betting Phase - With Bet") {
    ZStack {
        Color.Table.felt.ignoresSafeArea()
        ActionButtonsView(state: {
            let state = GameState(settings: GameSettings())
            state.placeBet(amount: 100)
            return state
        }())
    }
}

#Preview("Betting Phase - Below Minimum") {
    ZStack {
        Color.Table.felt.ignoresSafeArea()
        ActionButtonsView(state: {
            let state = GameState(settings: GameSettings())
            state.placeBet(amount: 25)
            return state
        }())
    }
}

// MARK: - Player Turn Button Previews

/// Preview helper that shows player turn button layouts without needing real game state.
private struct PlayerTurnButtonsPreview: View {
    let showHit: Bool
    let showStand: Bool
    let showDouble: Bool
    let showSplit: Bool
    let showSurrender: Bool
    
    private let containerHeight: CGFloat = 120
    
    var body: some View {
        ZStack {
            Color.clear
                .frame(height: containerHeight)
            
            // Single row of buttons matching actual game layout
            HStack(spacing: Design.Spacing.medium) {
                if showHit {
                    ActionButton("Hit", style: .custom(Color.Button.hit)) {}
                }
                if showStand {
                    ActionButton("Stand", style: .custom(Color.Button.stand)) {}
                }
                if showDouble {
                    ActionButton("Double", style: .custom(Color.Button.doubleDown)) {}
                }
                if showSplit {
                    ActionButton("Split", style: .custom(Color.Button.split)) {}
                }
                if showSurrender {
                    ActionButton("Surrender", style: .custom(Color.Button.surrender)) {}
                }
            }
        }
        .padding(.horizontal, Design.Spacing.large)
    }
}

#Preview("Player Turn - Hit & Stand Only") {
    ZStack {
        Color.Table.felt.ignoresSafeArea()
        PlayerTurnButtonsPreview(
            showHit: true,
            showStand: true,
            showDouble: false,
            showSplit: false,
            showSurrender: false
        )
    }
}

#Preview("Player Turn - With Double") {
    ZStack {
        Color.Table.felt.ignoresSafeArea()
        PlayerTurnButtonsPreview(
            showHit: true,
            showStand: true,
            showDouble: true,
            showSplit: false,
            showSurrender: false
        )
    }
}

#Preview("Player Turn - With Split") {
    ZStack {
        Color.Table.felt.ignoresSafeArea()
        PlayerTurnButtonsPreview(
            showHit: true,
            showStand: true,
            showDouble: true,
            showSplit: true,
            showSurrender: false
        )
    }
}

#Preview("Player Turn - With Surrender") {
    ZStack {
        Color.Table.felt.ignoresSafeArea()
        PlayerTurnButtonsPreview(
            showHit: true,
            showStand: true,
            showDouble: true,
            showSplit: false,
            showSurrender: true
        )
    }
}

#Preview("Player Turn - All Options") {
    ZStack {
        Color.Table.felt.ignoresSafeArea()
        PlayerTurnButtonsPreview(
            showHit: true,
            showStand: true,
            showDouble: true,
            showSplit: true,
            showSurrender: true
        )
    }
}

#Preview("Player Turn - After Hit (No Double/Split)") {
    ZStack {
        Color.Table.felt.ignoresSafeArea()
        PlayerTurnButtonsPreview(
            showHit: true,
            showStand: true,
            showDouble: false,
            showSplit: false,
            showSurrender: false
        )
    }
}

#Preview("Player Turn - Split Hand (No Resplit)") {
    ZStack {
        Color.Table.felt.ignoresSafeArea()
        PlayerTurnButtonsPreview(
            showHit: true,
            showStand: true,
            showDouble: true,
            showSplit: false,
            showSurrender: false
        )
    }
}