//
//  VotingLayoutPickerView.swift
//  Feels (iOS)
//
//  Created by Claude Code on 12/9/24.
//

import SwiftUI

struct VotingLayoutPickerView: View {
    @AppStorage(UserDefaultsStore.Keys.theme.rawValue, store: GroupUserDefaults.groupDefaults) private var theme: Theme = .system
    @AppStorage(UserDefaultsStore.Keys.textColor.rawValue, store: GroupUserDefaults.groupDefaults) private var textColor: Color = DefaultTextColor.textColor
    @AppStorage(UserDefaultsStore.Keys.votingLayoutStyle.rawValue, store: GroupUserDefaults.groupDefaults) private var votingLayoutStyle: Int = 0

    private var currentLayout: VotingLayoutStyle {
        VotingLayoutStyle(rawValue: votingLayoutStyle) ?? .horizontal
    }

    var body: some View {
        ZStack {
            theme.currentTheme.secondaryBGColor

            VStack(alignment: .leading, spacing: 12) {
                Text("Voting Layout")
                    .font(.headline)
                    .foregroundColor(textColor)
                    .padding(.horizontal)
                    .padding(.top)

                HStack(spacing: 8) {
                    ForEach(VotingLayoutStyle.allCases, id: \.rawValue) { layout in
                        Button(action: {
                            withAnimation(.easeInOut(duration: 0.2)) {
                                votingLayoutStyle = layout.rawValue
                            }
                            EventLogger.log(event: "change_voting_layout", withData: ["layout": layout.displayName])
                        }) {
                            VStack(spacing: 6) {
                                layoutIcon(for: layout)
                                    .frame(width: 44, height: 44)
                                    .foregroundColor(currentLayout == layout ? .accentColor : textColor.opacity(0.6))

                                Text(layout.displayName)
                                    .font(.caption)
                                    .foregroundColor(currentLayout == layout ? .accentColor : textColor.opacity(0.8))
                            }
                            .frame(maxWidth: .infinity)
                            .padding(.vertical, 12)
                            .background(
                                RoundedRectangle(cornerRadius: 10)
                                    .fill(currentLayout == layout ? Color.accentColor.opacity(0.15) : Color.clear)
                            )
                            .overlay(
                                RoundedRectangle(cornerRadius: 10)
                                    .stroke(currentLayout == layout ? Color.accentColor : Color.clear, lineWidth: 2)
                            )
                        }
                        .buttonStyle(.plain)
                    }
                }
                .padding(.horizontal)
                .padding(.bottom)
            }
        }
        .fixedSize(horizontal: false, vertical: true)
        .cornerRadius(Constants.viewsCornerRaidus, corners: [.topLeft, .topRight, .bottomLeft, .bottomRight])
    }

    @ViewBuilder
    private func layoutIcon(for layout: VotingLayoutStyle) -> some View {
        switch layout {
        case .horizontal:
            HStack(spacing: 4) {
                ForEach(0..<5) { _ in
                    Circle()
                        .frame(width: 6, height: 6)
                }
            }
        case .cards:
            LazyVGrid(columns: [GridItem(.flexible()), GridItem(.flexible()), GridItem(.flexible())], spacing: 3) {
                ForEach(0..<6) { _ in
                    RoundedRectangle(cornerRadius: 2)
                        .frame(width: 10, height: 12)
                }
            }
        case .radial:
            ZStack {
                ForEach(0..<5) { index in
                    Circle()
                        .frame(width: 6, height: 6)
                        .offset(radialOffset(index: index, total: 5, radius: 16))
                }
            }
        case .stacked:
            VStack(spacing: 3) {
                ForEach(0..<4) { _ in
                    RoundedRectangle(cornerRadius: 2)
                        .frame(width: 32, height: 6)
                }
            }
        }
    }

    private func radialOffset(index: Int, total: Int, radius: CGFloat) -> CGSize {
        let angle = Double.pi - (Double.pi * Double(index) / Double(total - 1))
        return CGSize(
            width: radius * CGFloat(cos(angle)),
            height: -radius * CGFloat(sin(angle)) + 4
        )
    }
}

struct VotingLayoutPickerView_Previews: PreviewProvider {
    static var previews: some View {
        VotingLayoutPickerView()
            .padding()
    }
}