//
//  AnimatedComponents.swift
//  SportsTime
//
//  Animated UI components for visual delight.
//

import SwiftUI

// MARK: - Animated Route Graphic

/// A stylized animated route illustration for loading states
struct AnimatedRouteGraphic: View {
    @State private var animationProgress: CGFloat = 0
    @State private var dotPositions: [CGFloat] = [0.1, 0.4, 0.7]

    var body: some View {
        GeometryReader { geo in
            let width = geo.size.width
            let height = geo.size.height

            Canvas { context, size in
                // Draw the route path
                let path = createRoutePath(in: CGRect(origin: .zero, size: size))

                // Glow layer
                context.addFilter(.blur(radius: 8))
                context.stroke(
                    path,
                    with: .linearGradient(
                        Gradient(colors: [Theme.routeGold.opacity(0.5), Theme.warmOrange.opacity(0.5)]),
                        startPoint: .zero,
                        endPoint: CGPoint(x: size.width, y: size.height)
                    ),
                    lineWidth: 6
                )

                // Reset filter and draw main line
                context.addFilter(.blur(radius: 0))
                context.stroke(
                    path,
                    with: .linearGradient(
                        Gradient(colors: [Theme.routeGold, Theme.warmOrange]),
                        startPoint: .zero,
                        endPoint: CGPoint(x: size.width, y: size.height)
                    ),
                    style: StrokeStyle(lineWidth: 3, lineCap: .round, lineJoin: .round)
                )
            }

            // Animated traveling dot
            Circle()
                .fill(Theme.warmOrange)
                .frame(width: 12, height: 12)
                .glowEffect(color: Theme.warmOrange, radius: 12)
                .position(
                    x: width * 0.1 + (width * 0.8) * animationProgress,
                    y: height * 0.6 + sin(animationProgress * .pi * 2) * (height * 0.2)
                )

            // Stadium markers
            ForEach(Array(dotPositions.enumerated()), id: \.offset) { index, pos in
                PulsingDot(color: index == 0 ? Theme.mlbRed : (index == 1 ? Theme.nbaOrange : Theme.nhlBlue))
                    .frame(width: 16, height: 16)
                    .position(
                        x: width * 0.1 + (width * 0.8) * pos,
                        y: height * 0.6 + sin(pos * .pi * 2) * (height * 0.2)
                    )
            }
        }
        .onAppear {
            withAnimation(.easeInOut(duration: Theme.Animation.routeDrawDuration).repeatForever(autoreverses: false)) {
                animationProgress = 1
            }
        }
    }

    private func createRoutePath(in rect: CGRect) -> Path {
        Path { path in
            let startX = rect.width * 0.1
            let endX = rect.width * 0.9
            let midY = rect.height * 0.6
            let amplitude = rect.height * 0.2

            path.move(to: CGPoint(x: startX, y: midY))

            // Create a smooth curve through the points
            let controlPoints: [(CGFloat, CGFloat)] = [
                (0.25, midY - amplitude * 0.5),
                (0.4, midY + amplitude * 0.3),
                (0.55, midY - amplitude * 0.4),
                (0.7, midY + amplitude * 0.2),
                (0.85, midY - amplitude * 0.1)
            ]

            for (progress, y) in controlPoints {
                let x = startX + (endX - startX) * progress
                path.addLine(to: CGPoint(x: x, y: y))
            }

            path.addLine(to: CGPoint(x: endX, y: midY))
        }
    }
}

// MARK: - Themed Spinner

/// A custom animated spinner matching the app's visual style
/// Both ThemedSpinner and ThemedSpinnerCompact use the same visual style for consistency
struct ThemedSpinner: View {
    var size: CGFloat = 40
    var lineWidth: CGFloat = 4
    var color: Color = Theme.warmOrange

    @State private var rotation: Double = 0

    var body: some View {
        ZStack {
            // Background track
            Circle()
                .stroke(color.opacity(0.2), lineWidth: lineWidth)

            // Animated arc
            Circle()
                .trim(from: 0, to: 0.7)
                .stroke(color, style: StrokeStyle(lineWidth: lineWidth, lineCap: .round))
                .rotationEffect(.degrees(rotation))
        }
        .frame(width: size, height: size)
        .onAppear {
            withAnimation(.linear(duration: 0.8).repeatForever(autoreverses: false)) {
                rotation = 360
            }
        }
    }
}

/// Compact themed spinner for inline use (same style as ThemedSpinner, smaller default)
struct ThemedSpinnerCompact: View {
    var size: CGFloat = 20
    var color: Color = Theme.warmOrange

    @State private var rotation: Double = 0

    var body: some View {
        ZStack {
            // Background track
            Circle()
                .stroke(color.opacity(0.2), lineWidth: size > 16 ? 2.5 : 2)

            // Animated arc
            Circle()
                .trim(from: 0, to: 0.7)
                .stroke(color, style: StrokeStyle(lineWidth: size > 16 ? 2.5 : 2, lineCap: .round))
                .rotationEffect(.degrees(rotation))
        }
        .frame(width: size, height: size)
        .onAppear {
            withAnimation(.linear(duration: 0.8).repeatForever(autoreverses: false)) {
                rotation = 360
            }
        }
    }
}

// MARK: - Pulsing Dot

struct PulsingDot: View {
    var color: Color = Theme.warmOrange
    var size: CGFloat = 12

    @State private var isPulsing = false

    var body: some View {
        ZStack {
            // Outer pulse ring
            Circle()
                .stroke(color.opacity(0.3), lineWidth: 2)
                .frame(width: size * 2, height: size * 2)
                .scaleEffect(isPulsing ? 1.5 : 1)
                .opacity(isPulsing ? 0 : 1)

            // Inner dot
            Circle()
                .fill(color)
                .frame(width: size, height: size)
                .shadow(color: color.opacity(0.5), radius: 4)
        }
        .onAppear {
            withAnimation(.easeOut(duration: 1.5).repeatForever(autoreverses: false)) {
                isPulsing = true
            }
        }
    }
}

// MARK: - Route Preview Strip

/// A compact horizontal visualization of route stops
struct RoutePreviewStrip: View {
    let cities: [String]
    @Environment(\.colorScheme) private var colorScheme

    init(cities: [String]) {
        self.cities = cities
    }

    var body: some View {
        HStack(spacing: 4) {
            ForEach(Array(cities.enumerated()), id: \.offset) { index, city in
                if index > 0 {
                    // Connector line
                    Rectangle()
                        .fill(Theme.routeGold.opacity(0.5))
                        .frame(width: 12, height: 2)
                }

                // City dot with label
                VStack(spacing: 4) {
                    Circle()
                        .fill(index == 0 || index == cities.count - 1 ? Theme.warmOrange : Theme.routeGold)
                        .frame(width: 8, height: 8)

                    Text(abbreviateCity(city))
                        .font(.system(size: 10, weight: .medium))
                        .foregroundStyle(Theme.textSecondary(colorScheme))
                        .lineLimit(1)
                }
            }
        }
    }

    private func abbreviateCity(_ city: String) -> String {
        let words = city.split(separator: " ")
        if words.count > 1 {
            return String(words[0].prefix(3))
        }
        return String(city.prefix(4))
    }
}

// MARK: - Planning Progress View

struct PlanningProgressView: View {
    @State private var currentStep = 0
    let steps = ["Finding games...", "Calculating routes...", "Optimizing itinerary..."]
    @Environment(\.colorScheme) private var colorScheme

    var body: some View {
        VStack(spacing: 24) {
            // Themed spinner
            ThemedSpinner(size: 56, lineWidth: 5)

            // Current step text
            Text(steps[currentStep])
                .font(.system(size: 16, weight: .medium))
                .foregroundStyle(Theme.textSecondary(colorScheme))
                .animation(.easeInOut, value: currentStep)
        }
        .frame(maxWidth: .infinity)
        .padding(.vertical, 40)
        .task {
            await animateSteps()
        }
    }

    private func animateSteps() async {
        while !Task.isCancelled {
            try? await Task.sleep(for: .milliseconds(1500))
            guard !Task.isCancelled else { break }
            withAnimation(.easeInOut) {
                currentStep = (currentStep + 1) % steps.count
            }
        }
    }
}

// MARK: - Stat Pill

struct StatPill: View {
    let icon: String
    let value: String
    @Environment(\.colorScheme) private var colorScheme

    var body: some View {
        HStack(spacing: 6) {
            Image(systemName: icon)
                .font(.system(size: 12))
            Text(value)
                .font(.system(size: 13, weight: .medium))
        }
        .foregroundStyle(Theme.textSecondary(colorScheme))
        .padding(.horizontal, 12)
        .padding(.vertical, 6)
        .background(Theme.cardBackgroundElevated(colorScheme))
        .clipShape(Capsule())
    }
}

// MARK: - Empty State View

struct EmptyStateView: View {
    let icon: String
    let title: String
    let message: String
    var actionTitle: String? = nil
    var action: (() -> Void)? = nil
    @Environment(\.colorScheme) private var colorScheme

    var body: some View {
        VStack(spacing: 20) {
            Image(systemName: icon)
                .font(.system(size: 48))
                .foregroundStyle(Theme.warmOrange.opacity(0.7))

            VStack(spacing: 8) {
                Text(title)
                    .font(.system(size: 20, weight: .semibold))
                    .foregroundStyle(Theme.textPrimary(colorScheme))

                Text(message)
                    .font(.system(size: 15))
                    .foregroundStyle(Theme.textSecondary(colorScheme))
                    .multilineTextAlignment(.center)
            }

            if let actionTitle = actionTitle, let action = action {
                Button(action: action) {
                    Text(actionTitle)
                        .font(.system(size: 16, weight: .semibold))
                        .foregroundStyle(.white)
                        .padding(.horizontal, 24)
                        .padding(.vertical, 12)
                        .background(Theme.warmOrange)
                        .clipShape(Capsule())
                }
                .pressableStyle()
                .padding(.top, 8)
            }
        }
        .padding(40)
    }
}

// MARK: - Loading Overlay

/// A modal loading overlay with progress indication
/// Reusable pattern from PDF export overlay
struct LoadingOverlay: View {
    let message: String
    var detail: String?
    var progress: Double?
    var icon: String = "hourglass"

    @Environment(\.colorScheme) private var colorScheme

    var body: some View {
        ZStack {
            // Background dimmer
            Color.black.opacity(0.6)
                .ignoresSafeArea()

            // Progress card
            VStack(spacing: Theme.Spacing.lg) {
                // Progress ring or spinner
                ZStack {
                    Circle()
                        .stroke(Theme.cardBackgroundElevated(colorScheme), lineWidth: 8)
                        .frame(width: 80, height: 80)

                    if let progress = progress {
                        Circle()
                            .trim(from: 0, to: progress)
                            .stroke(Theme.warmOrange, style: StrokeStyle(lineWidth: 8, lineCap: .round))
                            .frame(width: 80, height: 80)
                            .rotationEffect(.degrees(-90))
                            .animation(.easeInOut(duration: 0.3), value: progress)
                    } else {
                        ThemedSpinner(size: 48, lineWidth: 5)
                    }

                    Image(systemName: icon)
                        .font(.system(size: 24))
                        .foregroundStyle(Theme.warmOrange)
                        .opacity(progress != nil ? 1 : 0)
                }

                VStack(spacing: Theme.Spacing.xs) {
                    Text(message)
                        .font(.system(size: Theme.FontSize.cardTitle, weight: .semibold))
                        .foregroundStyle(Theme.textPrimary(colorScheme))

                    if let detail = detail {
                        Text(detail)
                            .font(.system(size: Theme.FontSize.caption))
                            .foregroundStyle(Theme.textSecondary(colorScheme))
                            .multilineTextAlignment(.center)
                    }

                    if let progress = progress {
                        Text("\(Int(progress * 100))%")
                            .font(.system(size: Theme.FontSize.micro, weight: .medium, design: .monospaced))
                            .foregroundStyle(Theme.textMuted(colorScheme))
                    }
                }
            }
            .padding(Theme.Spacing.xl)
            .background(Theme.cardBackground(colorScheme))
            .clipShape(RoundedRectangle(cornerRadius: Theme.CornerRadius.large))
            .shadow(color: .black.opacity(0.3), radius: 20, y: 10)
        }
        .transition(.opacity)
    }
}

// MARK: - Preview

#Preview("Themed Spinners") {
    VStack(spacing: 40) {
        ThemedSpinner(size: 60, lineWidth: 5)

        ThemedSpinner(size: 40)

        ThemedSpinnerCompact()

        HStack(spacing: 20) {
            ThemedSpinnerCompact(size: 16)
            Text("Loading...")
        }
    }
    .padding(40)
    .themedBackground()
}

#Preview("Animated Components") {
    VStack(spacing: 40) {
        AnimatedRouteGraphic()
            .frame(height: 150)

        RoutePreviewStrip(cities: ["San Diego", "Los Angeles", "San Francisco", "Seattle", "Portland"])

        PlanningProgressView()

        HStack {
            StatPill(icon: "car", value: "450 mi")
            StatPill(icon: "clock", value: "8h driving")
        }

        PulsingDot(color: Theme.warmOrange)
            .frame(width: 40, height: 40)
    }
    .padding()
    .themedBackground()
}

#Preview("Loading Overlay") {
    ZStack {
        Color.gray
        LoadingOverlay(
            message: "Planning Your Trip",
            detail: "Finding the best route..."
        )
    }
}

#Preview("Loading Overlay with Progress") {
    ZStack {
        Color.gray
        LoadingOverlay(
            message: "Creating PDF",
            detail: "Processing images...",
            progress: 0.65,
            icon: "doc.fill"
        )
    }
}