//
//  PlanSelector.swift
//  wake
//
//  Created by fairclip on 2025/8/19.
//

import SwiftUI

// MARK: - 计划选择器组件
struct PlanSelector: View {
    @Binding var selectedPlan: SubscriptionPlan?
    let onPlanSelected: (SubscriptionPlan) -> Void
    
    private let plans: [SubscriptionPlan] = [.free, .pioneer]
    
    init(
        selectedPlan: Binding<SubscriptionPlan?>,
        onPlanSelected: @escaping (SubscriptionPlan) -> Void = { _ in }
    ) {
        self._selectedPlan = selectedPlan
        self.onPlanSelected = onPlanSelected
    }
    
    var body: some View {
        HStack(spacing: Theme.Spacing.md) {
            ForEach(plans, id: \.self) { plan in
                PlanCard(
                    plan: plan,
                    isSelected: selectedPlan == plan,
                    onTap: {
                        selectedPlan = plan
                        onPlanSelected(plan)
                    }
                )
            }
        }
    }
}

// MARK: - 单个计划卡片
struct PlanCard: View {
    let plan: SubscriptionPlan
    let isSelected: Bool
    let onTap: () -> Void
    
    var body: some View {
        Button(action: onTap) {
            ZStack {
                // 主卡片内容
                VStack(spacing: Theme.Spacing.sm) {
                     // Popular 标签
                    if plan.isPopular {
                        VStack {    
                            HStack  {
                                Spacer()
                                Text("Popular")
                                    .font(Typography.font(for: .caption, family: .quicksandRegular))
                                    .foregroundColor(Color.white)
                                    .padding(.horizontal, Theme.Spacing.sm)
                                    .padding(.vertical, Theme.Spacing.xs)
                                    .background(Color.black)
                                    .cornerRadius(Theme.CornerRadius.round, corners: [.bottomLeft])
                            }
                            Spacer()
                            
                            VStack {
                                // 计划名称
                                Text(plan.displayName)
                                    .font(Typography.font(for: .title, family: .quicksandBold, size: 18))
                                    .foregroundColor(plan == .pioneer ? Theme.Colors.textPrimary: Theme.Colors.textTertiary )
                                
                                // 价格
                                if plan == .pioneer {
                                    Text(plan.price)
                                        .font(Typography.font(for: .body, family: .quicksandBold, size: 20))
                                        .foregroundColor(Theme.Colors.textPrimary)
                                }
                            }
                            Spacer()
                            Spacer()
                        }
                    }
                    else {
                    // 计划名称
                    Text(plan.displayName)
                        .font(Typography.font(for: .title, family: .quicksandBold, size: 18))
                        .foregroundColor(plan == .pioneer ? Theme.Colors.textPrimary: Theme.Colors.textTertiary )
                    
                    // 价格
                    if plan == .pioneer {
                        Text(plan.price)
                            .font(Typography.font(for: .body, family: .quicksandBold, size: 20))
                            .foregroundColor(Theme.Colors.textPrimary)
                    }
                }
            }
            .frame(maxWidth: .infinity)
            .frame(height: 120)
            .background(
                plan == .pioneer ? 
                Theme.Colors.primary : 
                Theme.Colors.surfaceTertiary 
            )
            .overlay(
                RoundedRectangle(cornerRadius: Theme.CornerRadius.medium)
                    .stroke(
                        isSelected ? Theme.Colors.borderDark : Theme.Colors.border,
                        lineWidth: 2
                    )
            )
            .cornerRadius(Theme.CornerRadius.medium)
            }
        }
        .buttonStyle(PlainButtonStyle())
    }
}


// MARK: - 预览
#Preview("Plan Selector") {
    @State var selectedPlan: SubscriptionPlan? = .pioneer
    
    VStack(spacing: 20) {
        PlanSelector(
            selectedPlan: $selectedPlan,
            onPlanSelected: { plan in
                print("Selected plan: \(plan.displayName)")
            }
        )
        
    }
    .padding()
    .background(Color(.systemGroupedBackground))
}