import Foundation
import SwiftUI
#if canImport(LCEssentials)
import LCEssentials
#endif

struct PizzaFlavorAddonsSheet: View {
    let flavor: StoreCatalogProduct
    @Binding var quantities: [String: Int]

    @Environment(\.dismiss) var dismiss

    var body: some View {
        LCENavigationView {
            content
        }
        .setLeftButton(image: AnyView(AppBackButtonIcon())) { dismiss() }
        .setTitle(text: Text("Adicionais").font(AppTypography.heading2).foregroundStyle(AppColors.textPrimary))
    }

    private var content: some View {
        ScrollView(showsIndicators: false) {
            VStack(alignment: .leading, spacing: 12) {
                Text(flavor.name)
                    .font(AppTypography.heading2)
                    .foregroundStyle(AppColors.textPrimary)

                if flavor.addonGroups.isEmpty {
                    Text("Este sabor não possui adicionais.")
                        .font(AppTypography.body)
                        .foregroundStyle(AppColors.textMuted)
                } else {
                    ForEach(flavor.addonGroups) { group in
                        VStack(alignment: .leading, spacing: 10) {
                            Text(group.name)
                                .font(AppTypography.heading3)
                                .foregroundStyle(AppColors.textPrimary)

                            ForEach(group.items) { item in
                                HStack(spacing: 10) {
                                    VStack(alignment: .leading, spacing: 4) {
                                        Text(item.name)
                                            .font(AppTypography.body)
                                            .foregroundStyle(AppColors.textPrimary)
                                        Text("+ \(formatCurrency(item.price ?? 0))")
                                            .font(.caption)
                                            .foregroundStyle(AppColors.textMuted)
                                    }

                                    Spacer()

                                    HStack(spacing: 8) {
                                        Button(action: { decrement(item.id) }) {
                                            Image(systemName: "minus")
                                                .font(.system(size: 12, weight: .bold))
                                                .foregroundStyle(AppColors.textPrimary)
                                                .frame(width: 26, height: 26)
                                                .background(AppColors.brandSoft)
                                                .clipShape(Circle())
                                        }
                                        .buttonStyle(.plain)
                                        .disabled((quantities[item.id] ?? 0) <= 0)

                                        Text("\(quantities[item.id] ?? 0)")
                                            .font(AppTypography.heading3)
                                            .foregroundStyle(AppColors.textPrimary)
                                            .frame(minWidth: 18)

                                        Button(action: { increment(item.id) }) {
                                            Image(systemName: "plus")
                                                .font(.system(size: 12, weight: .bold))
                                                .foregroundStyle(AppColors.textPrimary)
                                                .frame(width: 26, height: 26)
                                                .background(AppColors.tertiary)
                                                .clipShape(Circle())
                                        }
                                        .buttonStyle(.plain)
                                    }
                                }
                            }
                        }
                        .padding(12)
                        .background(AppColors.surface)
                        .clipShape(RoundedRectangle(cornerRadius: AppLayout.radiusLG, style: .continuous))
                    }
                }
            }
            .padding(20)
        }
        .background(AppColors.backgroundLight.ignoresSafeArea())
        .appHiddenNavigationBar()
        .navigationBarBackButtonHidden(true)
    }


    private func increment(_ addonId: String) {
        quantities[addonId, default: 0] += 1
    }

    private func decrement(_ addonId: String) {
        let current = quantities[addonId] ?? 0
        if current <= 1 {
            quantities.removeValue(forKey: addonId)
        } else {
            quantities[addonId] = current - 1
        }
    }

    private func formatCurrency(_ value: Double) -> String {
        String(format: "R$ %.2f", value).replacingOccurrences(of: ".", with: ",")
    }
}