// CoachWidgets.swift
// Widgets d'écran d'accueil (cible CoachLiveActivity). Lisent le snapshot
// poussé par l'app dans l'App Group (CoachWidgetStore) — aucun accès réseau.
// Deux widgets : « Séance du jour » et « Score de forme ».
//
// ⚠️ Ce fichier appartient à la cible CoachLiveActivity. Il référence
// CoachWidgetSnapshot.swift, qui doit AUSSI appartenir à cette cible
// (Target Membership) — cf. docs/widgets-runbook-mac.md.

import WidgetKit
import SwiftUI

// MARK: - Timeline

struct CoachSnapshotEntry: TimelineEntry {
    let date: Date
    let snapshot: CoachWidgetSnapshot?
}

struct CoachWidgetProvider: TimelineProvider {
    func placeholder(in context: Context) -> CoachSnapshotEntry {
        CoachSnapshotEntry(date: Date(), snapshot: nil)
    }

    func getSnapshot(in context: Context, completion: @escaping (CoachSnapshotEntry) -> Void) {
        completion(CoachSnapshotEntry(date: Date(), snapshot: CoachWidgetStore.load()))
    }

    func getTimeline(in context: Context, completion: @escaping (Timeline<CoachSnapshotEntry>) -> Void) {
        let entry = CoachSnapshotEntry(date: Date(), snapshot: CoachWidgetStore.load())
        // L'app rafraîchit explicitement (WidgetCenter.reloadAllTimelines) à
        // chaque setSnapshot. On planifie en plus un refresh horaire de courtoisie.
        let next = Calendar.current.date(byAdding: .hour, value: 1, to: Date())
            ?? Date().addingTimeInterval(3600)
        completion(Timeline(entries: [entry], policy: .after(next)))
    }
}

// MARK: - Palette / icônes (alignées sur les couleurs sport de l'app)

private func sportColor(_ sport: String) -> Color {
    switch sport {
    case "running":  return Color(red: 1.00, green: 0.45, blue: 0.21)
    case "cycling":  return Color(red: 0.20, green: 0.78, blue: 0.35)
    case "strength": return Color(red: 0.69, green: 0.32, blue: 0.87)
    case "mobility": return Color(red: 0.35, green: 0.78, blue: 0.98)
    case "hiking", "walking": return Color(red: 0.80, green: 0.62, blue: 0.30)
    default:         return Color.gray
    }
}

private func sportSymbol(_ sport: String) -> String {
    switch sport {
    case "cycling":  return "bicycle"
    case "walking":  return "figure.walk"
    case "hiking":   return "figure.hiking"
    case "strength": return "dumbbell.fill"
    case "mobility": return "figure.yoga"
    case "rest":     return "moon.zzz.fill"
    default:         return "figure.run"
    }
}

private func sportLabel(_ sport: String) -> String {
    switch sport {
    case "running":  return "Course"
    case "cycling":  return "Vélo"
    case "walking":  return "Marche"
    case "hiking":   return "Rando"
    case "strength": return "Renfo"
    case "mobility": return "Mobilité"
    case "rest":     return "Repos"
    default:         return sport.capitalized
    }
}

// Applique le fond container (requis iOS 17+) sans casser le build < 17.
private extension View {
    @ViewBuilder
    func coachWidgetBackground() -> some View {
        if #available(iOS 17.0, *) {
            self.containerBackground(.fill.tertiary, for: .widget)
        } else {
            self.padding()
        }
    }
}

// MARK: - Widget « Séance du jour »

struct CoachTodaySessionEntryView: View {
    var entry: CoachSnapshotEntry
    @Environment(\.widgetFamily) private var family

    var body: some View {
        let today = entry.snapshot?.today
        Group {
            if let s = today {
                if family == .systemMedium {
                    mediumView(s)
                } else {
                    smallView(s)
                }
            } else {
                emptyView
            }
        }
        .coachWidgetBackground()
        .widgetURL(URL(string: "https://coach.hypnotruck.ch/calendar"))
    }

    private func header(_ s: CoachWidgetSnapshot.TodaySession) -> some View {
        HStack(spacing: 6) {
            Image(systemName: sportSymbol(s.sport))
                .foregroundStyle(sportColor(s.sport))
            Text(sportLabel(s.sport).uppercased())
                .font(.caption2.weight(.bold))
                .foregroundStyle(.secondary)
            Spacer()
            if s.done {
                Image(systemName: "checkmark.seal.fill")
                    .foregroundStyle(.green)
                    .font(.caption)
            }
        }
    }

    private func smallView(_ s: CoachWidgetSnapshot.TodaySession) -> some View {
        VStack(alignment: .leading, spacing: 6) {
            header(s)
            Spacer(minLength: 0)
            Text(s.title)
                .font(.headline)
                .lineLimit(2)
                .minimumScaleFactor(0.8)
            if let sub = s.subtitle, !sub.isEmpty {
                Text(sub).font(.caption).foregroundStyle(.secondary).lineLimit(1)
            }
        }
        .frame(maxWidth: .infinity, maxHeight: .infinity, alignment: .leading)
    }

    private func mediumView(_ s: CoachWidgetSnapshot.TodaySession) -> some View {
        HStack(spacing: 14) {
            ZStack {
                Circle().fill(sportColor(s.sport).opacity(0.18))
                Image(systemName: sportSymbol(s.sport))
                    .font(.title2)
                    .foregroundStyle(sportColor(s.sport))
            }
            .frame(width: 56, height: 56)
            VStack(alignment: .leading, spacing: 4) {
                Text("Séance du jour")
                    .font(.caption2.weight(.bold))
                    .foregroundStyle(.secondary)
                Text(s.title).font(.headline).lineLimit(2)
                if let sub = s.subtitle, !sub.isEmpty {
                    Text(sub).font(.subheadline).foregroundStyle(.secondary).lineLimit(1)
                }
                if s.done {
                    Label("Réalisée", systemImage: "checkmark.seal.fill")
                        .font(.caption2).foregroundStyle(.green)
                }
            }
            Spacer(minLength: 0)
        }
        .frame(maxWidth: .infinity, maxHeight: .infinity, alignment: .leading)
    }

    private var emptyView: some View {
        VStack(alignment: .leading, spacing: 6) {
            HStack(spacing: 6) {
                Image(systemName: "moon.zzz.fill").foregroundStyle(.secondary)
                Text("JOUR OFF").font(.caption2.weight(.bold)).foregroundStyle(.secondary)
            }
            Spacer(minLength: 0)
            Text("Pas de séance prévue")
                .font(.subheadline).foregroundStyle(.secondary)
        }
        .frame(maxWidth: .infinity, maxHeight: .infinity, alignment: .leading)
    }
}

struct CoachTodaySessionWidget: Widget {
    let kind = "CoachTodaySessionWidget"
    var body: some WidgetConfiguration {
        StaticConfiguration(kind: kind, provider: CoachWidgetProvider()) { entry in
            CoachTodaySessionEntryView(entry: entry)
        }
        .configurationDisplayName("Séance du jour")
        .description("La séance prévue aujourd'hui dans ton programme.")
        .supportedFamilies([.systemSmall, .systemMedium])
    }
}

// MARK: - Widget « Score de forme »

struct CoachFormeScoreEntryView: View {
    var entry: CoachSnapshotEntry

    private func ringColor(_ score: Int) -> Color {
        switch score {
        case 75...:  return Color(red: 0.20, green: 0.78, blue: 0.35)
        case 50..<75: return Color(red: 1.00, green: 0.80, blue: 0.0)
        default:      return Color(red: 1.00, green: 0.27, blue: 0.23)
        }
    }

    var body: some View {
        let forme = entry.snapshot?.forme
        VStack(spacing: 8) {
            Text("FORME")
                .font(.caption2.weight(.bold))
                .foregroundStyle(.secondary)
                .frame(maxWidth: .infinity, alignment: .leading)
            Spacer(minLength: 0)
            if let score = forme?.score {
                ZStack {
                    Circle().stroke(Color.secondary.opacity(0.18), lineWidth: 9)
                    Circle()
                        .trim(from: 0, to: min(max(Double(score) / 100.0, 0), 1))
                        .stroke(ringColor(score), style: StrokeStyle(lineWidth: 9, lineCap: .round))
                        .rotationEffect(.degrees(-90))
                    VStack(spacing: 0) {
                        Text("\(score)").font(.system(size: 30, weight: .bold, design: .rounded))
                        if let l = forme?.label, !l.isEmpty {
                            Text(l).font(.caption2).foregroundStyle(.secondary)
                        }
                    }
                }
                .frame(maxWidth: .infinity, maxHeight: .infinity)
            } else {
                VStack(spacing: 4) {
                    Image(systemName: "bolt.heart")
                        .font(.title)
                        .foregroundStyle(.secondary)
                    Text("Pas de score")
                        .font(.caption).foregroundStyle(.secondary)
                }
                .frame(maxWidth: .infinity, maxHeight: .infinity)
            }
        }
        .coachWidgetBackground()
        .widgetURL(URL(string: "https://coach.hypnotruck.ch/forme"))
    }
}

struct CoachFormeScoreWidget: Widget {
    let kind = "CoachFormeScoreWidget"
    var body: some WidgetConfiguration {
        StaticConfiguration(kind: kind, provider: CoachWidgetProvider()) { entry in
            CoachFormeScoreEntryView(entry: entry)
        }
        .configurationDisplayName("Score de forme")
        .description("Ton score de forme / récupération du jour.")
        .supportedFamilies([.systemSmall])
    }
}