//
//  ReflectLiveActivity.swift
//  ReflectWidget
//
//  Live Activity for mood streak tracking (Dynamic Island + Lock Screen)
//

import WidgetKit
import SwiftUI
import ActivityKit

// MARK: - Live Activity Widget
// Note: MoodStreakAttributes is defined in MoodStreakActivity.swift (Shared folder)

struct MoodStreakLiveActivity: Widget {
    var body: some WidgetConfiguration {
        ActivityConfiguration(for: MoodStreakAttributes.self) { context in
            // Lock Screen / StandBy view
            MoodStreakLockScreenView(context: context)
        } dynamicIsland: { context in
            DynamicIsland {
                // Expanded view
                DynamicIslandExpandedRegion(.leading) {
                    HStack(spacing: 8) {
                        Image(systemName: "flame.fill")
                            .foregroundColor(.orange)
                            .accessibilityHidden(true)
                        Text("\(context.state.currentStreak)")
                            .font(.title2.bold())
                    }
                    .accessibilityElement(children: .combine)
                    .accessibilityLabel(String(localized: "\(context.state.currentStreak) day streak"))
                }

                DynamicIslandExpandedRegion(.trailing) {
                    if context.state.hasLoggedToday {
                        Image(systemName: "checkmark.circle.fill")
                            .foregroundColor(.green)
                            .font(.title2)
                            .accessibilityLabel(String(localized: "Mood logged today"))
                    } else {
                        Text("Log now")
                            .font(.caption)
                            .foregroundColor(.secondary)
                    }
                }

                DynamicIslandExpandedRegion(.center) {
                    Text(context.state.hasLoggedToday ? "Streak: \(context.state.currentStreak) days" : (context.state.currentStreak > 0 ? "Don't break your streak!" : "Start your streak!"))
                        .font(.headline)
                }

                DynamicIslandExpandedRegion(.bottom) {
                    if !context.state.hasLoggedToday {
                        Text("Voting closes at midnight")
                            .font(.caption)
                            .foregroundColor(.secondary)
                    } else {
                        HStack {
                            Circle()
                                .fill(Color(hex: context.state.lastMoodColor))
                                .frame(width: 20, height: 20)
                                .accessibilityHidden(true)
                            Text("Today: \(context.state.lastMoodLogged)")
                                .font(.subheadline)
                        }
                        .accessibilityElement(children: .combine)
                    }
                }
            } compactLeading: {
                Image(systemName: "flame.fill")
                    .foregroundColor(.orange)
                    .accessibilityLabel(String(localized: "Streak"))
            } compactTrailing: {
                Text("\(context.state.currentStreak)")
                    .font(.caption.bold())
                    .accessibilityLabel(String(localized: "\(context.state.currentStreak) days"))
            } minimal: {
                Image(systemName: "flame.fill")
                    .foregroundColor(.orange)
                    .accessibilityLabel(String(localized: "Mood streak"))
            }
        }
    }
}

// MARK: - Lock Screen View

struct MoodStreakLockScreenView: View {
    let context: ActivityViewContext<MoodStreakAttributes>

    var body: some View {
        HStack(spacing: 16) {
            // Streak indicator
            VStack(spacing: 4) {
                Image(systemName: "flame.fill")
                    .font(.title)
                    .foregroundColor(.orange)
                    .accessibilityHidden(true)
                Text("\(context.state.currentStreak)")
                    .font(.title.bold())
                Text("day streak")
                    .font(.caption)
                    .foregroundColor(.secondary)
            }
            .accessibilityElement(children: .combine)
            .accessibilityLabel(String(localized: "\(context.state.currentStreak) day streak"))

            Divider()
                .frame(height: 50)

            // Status
            VStack(alignment: .leading, spacing: 8) {
                if context.state.hasLoggedToday {
                    HStack(spacing: 8) {
                        Circle()
                            .fill(Color(hex: context.state.lastMoodColor))
                            .frame(width: 24, height: 24)
                            .accessibilityHidden(true)
                        VStack(alignment: .leading) {
                            Text("Today's mood")
                                .font(.caption)
                                .foregroundColor(.secondary)
                            Text(context.state.lastMoodLogged)
                                .font(.headline)
                        }
                    }
                    .accessibilityElement(children: .combine)
                } else {
                    VStack(alignment: .leading) {
                        Text(context.state.currentStreak > 0 ? "Don't break your streak!" : "Start your streak!")
                            .font(.headline)
                        Text("Tap to log your mood")
                            .font(.caption)
                            .foregroundColor(.secondary)
                    }
                }
            }

            Spacer()
        }
        .padding()
        .activityBackgroundTint(Color(.systemBackground).opacity(0.8))
    }
}

// MARK: - Preview Sample Data

extension MoodStreakAttributes {
    static var preview: MoodStreakAttributes {
        MoodStreakAttributes(startDate: Date())
    }
}

extension MoodStreakAttributes.ContentState {
    static var notLogged: MoodStreakAttributes.ContentState {
        MoodStreakAttributes.ContentState(
            currentStreak: 7,
            lastMoodLogged: "None",
            lastMoodColor: "#888888",
            hasLoggedToday: false,
            votingWindowEnd: Calendar.current.date(bySettingHour: 23, minute: 59, second: 59, of: Date()) ?? Date()
        )
    }

    static var loggedGreat: MoodStreakAttributes.ContentState {
        MoodStreakAttributes.ContentState(
            currentStreak: 15,
            lastMoodLogged: "Great",
            lastMoodColor: MoodTints.Default.color(forMood: .great).toHex() ?? "#4CAF50",
            hasLoggedToday: true,
            votingWindowEnd: Calendar.current.date(bySettingHour: 23, minute: 59, second: 59, of: Date()) ?? Date()
        )
    }

    static var loggedGood: MoodStreakAttributes.ContentState {
        MoodStreakAttributes.ContentState(
            currentStreak: 30,
            lastMoodLogged: "Good",
            lastMoodColor: MoodTints.Default.color(forMood: .good).toHex() ?? "#8BC34A",
            hasLoggedToday: true,
            votingWindowEnd: Calendar.current.date(bySettingHour: 23, minute: 59, second: 59, of: Date()) ?? Date()
        )
    }

    static var loggedAverage: MoodStreakAttributes.ContentState {
        MoodStreakAttributes.ContentState(
            currentStreak: 10,
            lastMoodLogged: "Average",
            lastMoodColor: MoodTints.Default.color(forMood: .average).toHex() ?? "#FFC107",
            hasLoggedToday: true,
            votingWindowEnd: Calendar.current.date(bySettingHour: 23, minute: 59, second: 59, of: Date()) ?? Date()
        )
    }

    static var loggedBad: MoodStreakAttributes.ContentState {
        MoodStreakAttributes.ContentState(
            currentStreak: 5,
            lastMoodLogged: "Bad",
            lastMoodColor: MoodTints.Default.color(forMood: .bad).toHex() ?? "#FF9800",
            hasLoggedToday: true,
            votingWindowEnd: Calendar.current.date(bySettingHour: 23, minute: 59, second: 59, of: Date()) ?? Date()
        )
    }

    static var loggedHorrible: MoodStreakAttributes.ContentState {
        MoodStreakAttributes.ContentState(
            currentStreak: 3,
            lastMoodLogged: "Horrible",
            lastMoodColor: MoodTints.Default.color(forMood: .horrible).toHex() ?? "#F44336",
            hasLoggedToday: true,
            votingWindowEnd: Calendar.current.date(bySettingHour: 23, minute: 59, second: 59, of: Date()) ?? Date()
        )
    }
}

// MARK: - Live Activity Previews

#Preview("Lock Screen - Not Logged", as: .content, using: MoodStreakAttributes.preview) {
    MoodStreakLiveActivity()
} contentStates: {
    MoodStreakAttributes.ContentState.notLogged
}

#Preview("Lock Screen - Great", as: .content, using: MoodStreakAttributes.preview) {
    MoodStreakLiveActivity()
} contentStates: {
    MoodStreakAttributes.ContentState.loggedGreat
}

#Preview("Lock Screen - Good", as: .content, using: MoodStreakAttributes.preview) {
    MoodStreakLiveActivity()
} contentStates: {
    MoodStreakAttributes.ContentState.loggedGood
}

#Preview("Lock Screen - Average", as: .content, using: MoodStreakAttributes.preview) {
    MoodStreakLiveActivity()
} contentStates: {
    MoodStreakAttributes.ContentState.loggedAverage
}

#Preview("Lock Screen - Bad", as: .content, using: MoodStreakAttributes.preview) {
    MoodStreakLiveActivity()
} contentStates: {
    MoodStreakAttributes.ContentState.loggedBad
}

#Preview("Lock Screen - Horrible", as: .content, using: MoodStreakAttributes.preview) {
    MoodStreakLiveActivity()
} contentStates: {
    MoodStreakAttributes.ContentState.loggedHorrible
}

// MARK: - Dynamic Island Previews

#Preview("Dynamic Island Expanded - Not Logged", as: .dynamicIsland(.expanded), using: MoodStreakAttributes.preview) {
    MoodStreakLiveActivity()
} contentStates: {
    MoodStreakAttributes.ContentState.notLogged
}

#Preview("Dynamic Island Expanded - Logged", as: .dynamicIsland(.expanded), using: MoodStreakAttributes.preview) {
    MoodStreakLiveActivity()
} contentStates: {
    MoodStreakAttributes.ContentState.loggedGreat
}

#Preview("Dynamic Island Compact", as: .dynamicIsland(.compact), using: MoodStreakAttributes.preview) {
    MoodStreakLiveActivity()
} contentStates: {
    MoodStreakAttributes.ContentState.loggedGreat
}

#Preview("Dynamic Island Minimal", as: .dynamicIsland(.minimal), using: MoodStreakAttributes.preview) {
    MoodStreakLiveActivity()
} contentStates: {
    MoodStreakAttributes.ContentState.loggedGreat
}