import WidgetKit
import SwiftUI

struct HealthEntry: TimelineEntry {
    let date: Date
    let steps: Int
    let sleep: Double
    let heartRate: Int
    let readinessScore: Int
}

struct HealthProvider: TimelineProvider {
    func placeholder(in context: Context) -> HealthEntry {
        HealthEntry(date: Date(), steps: 6234, sleep: 7.5, heartRate: 68, readinessScore: 80)
    }

    func getSnapshot(in context: Context, completion: @escaping (HealthEntry) -> Void) {
        completion(currentEntry())
    }

    func getTimeline(in context: Context, completion: @escaping (Timeline<HealthEntry>) -> Void) {
        let entry = currentEntry()
        let next = Calendar.current.date(byAdding: .minute, value: 15, to: Date()) ?? Date()
        completion(Timeline(entries: [entry], policy: .after(next)))
    }

    private func currentEntry() -> HealthEntry {
        HealthEntry(
            date: Date(),
            steps: WidgetData.steps,
            sleep: WidgetData.sleep,
            heartRate: WidgetData.heartRate,
            readinessScore: WidgetData.readinessScore
        )
    }
}

struct HealthSummaryWidget: Widget {
    let kind = "HealthSummary"
    var body: some WidgetConfiguration {
        StaticConfiguration(kind: kind, provider: HealthProvider()) { entry in
            HealthWidgetView(entry: entry)
                .containerBackground(.fill.tertiary, for: .widget)
        }
        .configurationDisplayName("Здоровье")
        .description("Шаги, сон, пульс и готовность")
        .supportedFamilies([.systemSmall, .systemMedium])
    }
}

struct HealthWidgetView: View {
    let entry: HealthEntry
    @Environment(\.widgetFamily) var family

    var readinessColor: Color {
        if entry.readinessScore >= 80 { return Color(hex: "0D9488") }
        if entry.readinessScore >= 60 { return Color(hex: "ffa502") }
        return Color(hex: "ff4757")
    }

    var body: some View {
        Group {
            if family == .systemMedium { mediumView } else { smallView }
        }
        .frame(maxWidth: .infinity, maxHeight: .infinity)
        .background(Color(hex: "06060f"))
    }

    var smallView: some View {
        VStack(spacing: 8) {
            ZStack {
                Circle().stroke(Color.white.opacity(0.1), lineWidth: 6).frame(width: 50, height: 50)
                Circle().trim(from: 0, to: CGFloat(entry.readinessScore) / 100)
                    .stroke(readinessColor, style: StrokeStyle(lineWidth: 6, lineCap: .round))
                    .frame(width: 50, height: 50).rotationEffect(.degrees(-90))
                Text("\(entry.readinessScore)").font(.system(size: 16, weight: .bold, design: .rounded)).foregroundColor(readinessColor)
            }
            VStack(spacing: 4) {
                HStack(spacing: 4) {
                    Image(systemName: "figure.walk").font(.system(size: 9)).foregroundColor(Color(hex: "ffa502"))
                    Text("\(entry.steps)").font(.caption2.bold()).foregroundColor(.white)
                }
                HStack(spacing: 4) {
                    Image(systemName: "moon.fill").font(.system(size: 9)).foregroundColor(Color(hex: "7c3aed"))
                    Text(String(format: "%.1fч", entry.sleep)).font(.caption2.bold()).foregroundColor(.white)
                }
            }
        }
    }

    var mediumView: some View {
        HStack(spacing: 16) {
            ZStack {
                Circle().stroke(Color.white.opacity(0.1), lineWidth: 8).frame(width: 68, height: 68)
                Circle().trim(from: 0, to: CGFloat(entry.readinessScore) / 100)
                    .stroke(readinessColor, style: StrokeStyle(lineWidth: 8, lineCap: .round))
                    .frame(width: 68, height: 68).rotationEffect(.degrees(-90))
                VStack(spacing: 0) {
                    Text("\(entry.readinessScore)").font(.system(size: 20, weight: .bold, design: .rounded)).foregroundColor(readinessColor)
                    Text("балл").font(.system(size: 9)).foregroundColor(.gray)
                }
            }
            VStack(alignment: .leading, spacing: 6) {
                Text("Здоровье").font(.subheadline.bold()).foregroundColor(.white)
                HStack(spacing: 14) {
                    VStack(spacing: 3) {
                        Image(systemName: "figure.walk").font(.caption).foregroundColor(Color(hex: "ffa502"))
                        Text("\(entry.steps)").font(.caption2.bold()).foregroundColor(.white)
                    }
                    VStack(spacing: 3) {
                        Image(systemName: "moon.fill").font(.caption).foregroundColor(Color(hex: "7c3aed"))
                        Text(String(format: "%.1fч", entry.sleep)).font(.caption2.bold()).foregroundColor(.white)
                    }
                    VStack(spacing: 3) {
                        Image(systemName: "heart.fill").font(.caption).foregroundColor(Color(hex: "ff4757"))
                        Text("\(entry.heartRate)").font(.caption2.bold()).foregroundColor(.white)
                    }
                }
            }
        }.padding(16)
    }
}