//
//  OnboardingStyle.swift
//  Feels
//
//  Created by Claude Code on 12/10/24.
//

import SwiftUI

struct OnboardingStyle: View {
    @ObservedObject var onboardingData: OnboardingData
    @AppStorage(UserDefaultsStore.Keys.moodTint.rawValue, store: GroupUserDefaults.groupDefaults) private var moodTint: MoodTints = .Default
    @AppStorage(UserDefaultsStore.Keys.moodImages.rawValue, store: GroupUserDefaults.groupDefaults) private var imagePack: MoodImages = .FontAwesome

    var body: some View {
        ZStack {
            // Gradient background
            LinearGradient(
                colors: [Color(hex: "fa709a"), Color(hex: "fee140")],
                startPoint: .topLeading,
                endPoint: .bottomTrailing
            )
            .ignoresSafeArea()

            ScrollView(showsIndicators: false) {
                VStack(spacing: 0) {
                    // Icon
                    ZStack {
                        Circle()
                            .fill(.white.opacity(0.15))
                            .frame(width: 100, height: 100)

                        Image(systemName: "paintpalette.fill")
                            .font(.system(size: 40))
                            .foregroundColor(.white)
                    }
                    .padding(.top, 40)
                    .padding(.bottom, 20)

                    // Title
                    Text("Make it yours")
                        .font(.system(size: 28, weight: .bold, design: .rounded))
                        .foregroundColor(.white)
                        .padding(.bottom, 8)

                    // Subtitle
                    Text("Choose your favorite style")
                        .font(.system(size: 16, weight: .medium))
                        .foregroundColor(.white.opacity(0.85))
                        .padding(.bottom, 20)

                    // Preview card
                    OnboardingStylePreview(moodTint: moodTint, imagePack: imagePack)
                        .padding(.horizontal, 24)
                        .padding(.bottom, 20)

                    // Icon Style Section
                    VStack(alignment: .leading, spacing: 10) {
                        Text("Icon Style")
                            .font(.system(size: 14, weight: .semibold))
                            .foregroundColor(.white.opacity(0.9))
                            .padding(.horizontal, 24)

                        LazyVGrid(columns: [GridItem(.flexible()), GridItem(.flexible())], spacing: 10) {
                            ForEach(MoodImages.allCases, id: \.rawValue) { pack in
                                OnboardingIconPackOption(
                                    pack: pack,
                                    moodTint: moodTint,
                                    isSelected: imagePack == pack,
                                    action: {
                                        let impactMed = UIImpactFeedbackGenerator(style: .medium)
                                        impactMed.impactOccurred()
                                        imagePack = pack
                                    }
                                )
                            }
                        }
                        .padding(.horizontal, 24)
                    }
                    .padding(.bottom, 16)

                    // Color Theme Section
                    VStack(alignment: .leading, spacing: 10) {
                        Text("Mood Colors")
                            .font(.system(size: 14, weight: .semibold))
                            .foregroundColor(.white.opacity(0.9))
                            .padding(.horizontal, 24)

                        LazyVGrid(columns: [GridItem(.flexible()), GridItem(.flexible())], spacing: 10) {
                            ForEach(MoodTints.defaultOptions, id: \.rawValue) { tint in
                                OnboardingTintOption(
                                    tint: tint,
                                    isSelected: moodTint == tint,
                                    action: {
                                        let impactMed = UIImpactFeedbackGenerator(style: .medium)
                                        impactMed.impactOccurred()
                                        moodTint = tint
                                    }
                                )
                            }
                        }
                        .padding(.horizontal, 24)
                    }

                    // Hint
                    HStack(spacing: 8) {
                        Image(systemName: "arrow.left.arrow.right")
                            .font(.system(size: 14))
                        Text("You can change these anytime in Customize")
                            .font(.system(size: 13, weight: .medium))
                    }
                    .foregroundColor(.white.opacity(0.7))
                    .padding(.top, 20)
                    .padding(.bottom, 80)
                }
            }
        }
    }
}

// MARK: - Preview Card
struct OnboardingStylePreview: View {
    let moodTint: MoodTints
    let imagePack: MoodImages

    var body: some View {
        HStack(spacing: 16) {
            imagePack.icon(forMood: .good)
                .resizable()
                .aspectRatio(contentMode: .fit)
                .frame(width: 44, height: 44)
                .foregroundColor(moodTint.color(forMood: .good))

            VStack(alignment: .leading, spacing: 4) {
                Text("Wednesday - 10th")
                    .font(.system(size: 17, weight: .semibold))
                    .foregroundColor(.white)

                Text(Mood.good.strValue)
                    .font(.system(size: 14))
                    .foregroundColor(.white.opacity(0.8))
            }

            Spacer()
        }
        .padding(20)
        .background(
            RoundedRectangle(cornerRadius: 16)
                .fill(.white.opacity(0.2))
        )
    }
}

// MARK: - Icon Pack Option
struct OnboardingIconPackOption: View {
    let pack: MoodImages
    let moodTint: MoodTints
    let isSelected: Bool
    let action: () -> Void

    var body: some View {
        Button(action: action) {
            HStack(spacing: 6) {
                ForEach([Mood.great, .good, .average], id: \.self) { mood in
                    pack.icon(forMood: mood)
                        .resizable()
                        .aspectRatio(contentMode: .fit)
                        .frame(width: 24, height: 24)
                        .foregroundColor(moodTint.color(forMood: mood))
                }
            }
            .padding(.horizontal, 16)
            .padding(.vertical, 14)
            .background(
                RoundedRectangle(cornerRadius: 14)
                    .fill(isSelected ? .white : .white.opacity(0.2))
            )
            .overlay(
                RoundedRectangle(cornerRadius: 14)
                    .stroke(isSelected ? Color.clear : .white.opacity(0.3), lineWidth: 1)
            )
        }
        .buttonStyle(.plain)
    }
}

// MARK: - Tint Option
struct OnboardingTintOption: View {
    let tint: MoodTints
    let isSelected: Bool
    let action: () -> Void

    var body: some View {
        Button(action: action) {
            HStack(spacing: 4) {
                ForEach([Mood.great, .good, .average, .bad, .horrible], id: \.self) { mood in
                    Circle()
                        .fill(tint.color(forMood: mood))
                        .frame(width: 20, height: 20)
                }
            }
            .padding(.horizontal, 14)
            .padding(.vertical, 12)
            .background(
                RoundedRectangle(cornerRadius: 14)
                    .fill(isSelected ? .white : .white.opacity(0.2))
            )
            .overlay(
                RoundedRectangle(cornerRadius: 14)
                    .stroke(isSelected ? Color.clear : .white.opacity(0.3), lineWidth: 1)
            )
        }
        .buttonStyle(.plain)
    }
}

struct OnboardingStyle_Previews: PreviewProvider {
    static var previews: some View {
        OnboardingStyle(onboardingData: OnboardingData())
    }
}