//
//  SessionStatusLiveLiveActivity.swift

import ActivityKit
import SwiftUI
import WidgetKit

struct SessionActivityAttributes: ActivityAttributes, Sendable {
    public struct ContentState: Codable, Hashable, Sendable {
        var elapsed: TimeInterval
        var totalAttempts: Int
        var completedProblems: Int
    }

    var gymName: String
    var startTime: Date
}

struct SessionStatusLiveLiveActivity: Widget {
    var body: some WidgetConfiguration {
        ActivityConfiguration(for: SessionActivityAttributes.self) { context in
            LiveActivityView(context: context)
                .activityBackgroundTint(Color.blue.opacity(0.2))
                .activitySystemActionForegroundColor(Color.primary)
        } dynamicIsland: { context in
            DynamicIsland {
                DynamicIslandExpandedRegion(.leading) {
                    VStack(alignment: .leading, spacing: 4) {
                        if let uiImage = UIImage(named: "AppIcon") {
                            Image(uiImage: uiImage)
                                .resizable()
                                .frame(width: 24, height: 24)
                                .clipShape(RoundedRectangle(cornerRadius: 6))
                        } else {
                            Image(systemName: "figure.climbing")
                                .font(.title3)
                                .foregroundColor(.accentColor)
                        }
                        Text(context.attributes.gymName)
                            .font(.caption2)
                            .foregroundColor(.secondary)
                            .lineLimit(1)
                    }
                    .padding(.leading, 8)
                }
                DynamicIslandExpandedRegion(.trailing) {
                    VStack(alignment: .trailing, spacing: 4) {
                        LiveTimerView(start: context.attributes.startTime)
                            .font(.title2)
                            .fontWeight(.bold)
                            .monospacedDigit()
                        HStack(spacing: 4) {
                            Image(systemName: "hand.raised.fill")
                                .foregroundColor(.green)
                                .font(.caption)
                            Text("\(context.state.totalAttempts)")
                                .font(.caption)
                                .fontWeight(.semibold)
                            Text("attempts")
                                .font(.caption2)
                                .foregroundColor(.secondary)
                        }
                    }
                    .padding(.trailing, 8)
                }
                DynamicIslandExpandedRegion(.bottom) {
                    HStack {
                        Text("\(context.state.completedProblems) completed")
                            .font(.caption2)
                            .foregroundColor(.secondary)
                        Spacer()
                        Text("Tap to open")
                            .font(.caption2)
                            .foregroundColor(.secondary)
                    }
                    .padding(.horizontal, 12)
                    .padding(.bottom, 4)
                }
            } compactLeading: {
                Image(systemName: "figure.climbing")
                    .font(.footnote)
                    .foregroundColor(.accentColor)
            } compactTrailing: {
                LiveTimerView(start: context.attributes.startTime, compact: true)
            } minimal: {
                Image(systemName: "figure.climbing")
                    .font(.system(size: 8))
                    .foregroundColor(.accentColor)
            }
        }
    }
}

struct LiveActivityView: View {
    let context: ActivityViewContext<SessionActivityAttributes>

    var body: some View {
        HStack(spacing: 16) {
            LiveTimerView(start: context.attributes.startTime)
                .font(.largeTitle)
                .fontWeight(.bold)
                .monospacedDigit()
                .frame(minWidth: 80)

            VStack(alignment: .leading, spacing: 12) {
                HStack(spacing: 6) {
                    if let uiImage = UIImage(named: "AppIcon") {
                        Image(uiImage: uiImage)
                            .resizable()
                            .frame(width: 28, height: 28)
                            .clipShape(RoundedRectangle(cornerRadius: 7))
                    } else {
                        Image(systemName: "figure.climbing")
                            .font(.title2)
                            .foregroundColor(.accentColor)
                    }
                    VStack(alignment: .leading, spacing: 0) {
                        Text(context.attributes.gymName)
                            .font(.headline)
                            .fontWeight(.semibold)
                            .lineLimit(1)
                        Text("Climbing Session")
                            .font(.caption)
                            .foregroundColor(.secondary)
                    }
                }

                HStack(spacing: 20) {
                    VStack(alignment: .leading, spacing: 4) {
                        HStack(spacing: 6) {
                            Image(systemName: "hand.raised.fill")
                                .foregroundColor(.green)
                                .font(.title3)
                            Text("\(context.state.totalAttempts)")
                                .font(.title2)
                                .fontWeight(.bold)
                        }
                        Text("Total Attempts")
                            .font(.caption)
                            .foregroundColor(.secondary)
                    }

                    VStack(alignment: .leading, spacing: 4) {
                        HStack(spacing: 6) {
                            Image(systemName: "checkmark.circle.fill")
                                .foregroundColor(.green)
                                .font(.title3)
                            Text("\(context.state.completedProblems)")
                                .font(.title2)
                                .fontWeight(.bold)
                        }
                        Text("Completed")
                            .font(.caption)
                            .foregroundColor(.secondary)
                    }

                    Spacer()
                }
            }

            Spacer()
        }
        .padding(.horizontal, 16)
        .padding(.vertical, 12)
    }
}

struct LiveTimerView: View {
    let start: Date
    let compact: Bool
    let minimal: Bool

    init(start: Date, compact: Bool = false, minimal: Bool = false) {
        self.start = start
        self.compact = compact
        self.minimal = minimal
    }

    var body: some View {
        if minimal {
            Text(timerInterval: start...Date.distantFuture, countsDown: false)
                .font(.system(size: 8, weight: .medium, design: .monospaced))
        } else if compact {
            Text(timerInterval: start...Date.distantFuture, countsDown: false)
                .font(.caption.monospacedDigit())
                .frame(maxWidth: 40)
                .minimumScaleFactor(0.7)
        } else {
            Text(timerInterval: start...Date.distantFuture, countsDown: false)
                .monospacedDigit()
        }
    }
}

// Alias for compatibility
typealias TimerView = LiveTimerView

extension SessionActivityAttributes {
    fileprivate static var preview: SessionActivityAttributes {
        SessionActivityAttributes(
            gymName: "Summit Climbing Gym", startTime: Date().addingTimeInterval(-1234))
    }
}

extension SessionActivityAttributes.ContentState {
    fileprivate static var active: SessionActivityAttributes.ContentState {
        SessionActivityAttributes.ContentState(
            elapsed: 1234, totalAttempts: 8, completedProblems: 2)
    }

    fileprivate static var busy: SessionActivityAttributes.ContentState {
        SessionActivityAttributes.ContentState(
            elapsed: 3600, totalAttempts: 25, completedProblems: 7)
    }
}

#Preview("Notification", as: .content, using: SessionActivityAttributes.preview) {
    SessionStatusLiveLiveActivity()
} contentStates: {
    SessionActivityAttributes.ContentState.active
    SessionActivityAttributes.ContentState.busy
}