//
//  GameMatchConfirmationView.swift
//  SportsTime
//
//  View for confirming/selecting the correct game match from photo import.
//

import SwiftUI

// MARK: - Game Match Confirmation View

struct GameMatchConfirmationView: View {
    let candidate: PhotoImportCandidate
    let onConfirm: (GameMatchCandidate) -> Void
    let onSkip: () -> Void

    @Environment(\.colorScheme) private var colorScheme
    @Environment(\.dismiss) private var dismiss
    @State private var selectedMatch: GameMatchCandidate?

    var body: some View {
        NavigationStack {
            ScrollView {
                VStack(spacing: Theme.Spacing.lg) {
                    // Photo info header
                    photoInfoHeader
                        .staggeredAnimation(index: 0)

                    // Stadium info
                    if let stadium = candidate.bestStadiumMatch {
                        stadiumCard(stadium)
                            .staggeredAnimation(index: 1)
                    }

                    // Match options
                    matchOptionsSection
                        .staggeredAnimation(index: 2)

                    // Action buttons
                    actionButtons
                        .staggeredAnimation(index: 3)
                }
                .padding(Theme.Spacing.md)
            }
            .themedBackground()
            .navigationTitle("Confirm Game")
            .navigationBarTitleDisplayMode(.inline)
            .toolbar {
                ToolbarItem(placement: .cancellationAction) {
                    Button("Cancel") {
                        dismiss()
                    }
                }
            }
        }
        .onAppear {
            // Pre-select if single match
            if case .singleMatch(let match) = candidate.matchResult {
                selectedMatch = match
            }
        }
    }

    // MARK: - Photo Info Header

    private var photoInfoHeader: some View {
        VStack(spacing: Theme.Spacing.md) {
            // Icon
            ZStack {
                Circle()
                    .fill(Theme.warmOrange.opacity(0.15))
                    .frame(width: 80, height: 80)

                Image(systemName: "photo.fill")
                    .font(.largeTitle)
                    .foregroundStyle(Theme.warmOrange)
            }

            VStack(spacing: Theme.Spacing.xs) {
                if let date = candidate.metadata.captureDate {
                    Label(formatDate(date), systemImage: "calendar")
                        .font(.body)
                        .foregroundStyle(Theme.textPrimary(colorScheme))
                }

                if candidate.metadata.hasValidLocation {
                    Label("Location data available", systemImage: "location.fill")
                        .font(.subheadline)
                        .foregroundStyle(Theme.textSecondary(colorScheme))
                } else {
                    Label("No location data", systemImage: "location.slash")
                        .font(.subheadline)
                        .foregroundStyle(.red)
                }
            }
        }
        .frame(maxWidth: .infinity)
        .padding(Theme.Spacing.lg)
        .background(Theme.cardBackground(colorScheme))
        .clipShape(RoundedRectangle(cornerRadius: Theme.CornerRadius.large))
    }

    // MARK: - Stadium Card

    private func stadiumCard(_ match: StadiumMatch) -> some View {
        VStack(alignment: .leading, spacing: Theme.Spacing.md) {
            HStack {
                Image(systemName: "mappin.circle.fill")
                    .foregroundStyle(Theme.warmOrange)
                    .accessibilityHidden(true)
                Text("Nearest Stadium")
                    .font(.body)
                    .foregroundStyle(Theme.textPrimary(colorScheme))
                Spacer()
            }

            HStack {
                VStack(alignment: .leading, spacing: 4) {
                    Text(match.stadium.name)
                        .font(.headline)
                        .foregroundStyle(Theme.textPrimary(colorScheme))

                    Text(match.stadium.fullAddress)
                        .font(.subheadline)
                        .foregroundStyle(Theme.textSecondary(colorScheme))
                }

                Spacer()

                // Distance badge
                VStack(spacing: 2) {
                    Text(match.formattedDistance)
                        .font(.subheadline)
                        .foregroundStyle(confidenceColor(match.confidence))
                        .accessibilityLabel("\(match.formattedDistance), \(match.confidence.description) confidence")

                    Text(match.confidence.description)
                        .font(.caption2)
                        .foregroundStyle(Theme.textMuted(colorScheme))
                }
            }
        }
        .padding(Theme.Spacing.lg)
        .background(Theme.cardBackground(colorScheme))
        .clipShape(RoundedRectangle(cornerRadius: Theme.CornerRadius.large))
        .overlay {
            RoundedRectangle(cornerRadius: Theme.CornerRadius.large)
                .stroke(Theme.surfaceGlow(colorScheme), lineWidth: 1)
        }
    }

    // MARK: - Match Options Section

    private var matchOptionsSection: some View {
        VStack(alignment: .leading, spacing: Theme.Spacing.md) {
            HStack {
                Image(systemName: "sportscourt.fill")
                    .foregroundStyle(Theme.warmOrange)
                    .accessibilityHidden(true)
                Text(matchOptionsTitle)
                    .font(.body)
                    .foregroundStyle(Theme.textPrimary(colorScheme))
                Spacer()
            }

            matchOptionsContent
        }
        .padding(Theme.Spacing.lg)
        .background(Theme.cardBackground(colorScheme))
        .clipShape(RoundedRectangle(cornerRadius: Theme.CornerRadius.large))
        .overlay {
            RoundedRectangle(cornerRadius: Theme.CornerRadius.large)
                .stroke(Theme.surfaceGlow(colorScheme), lineWidth: 1)
        }
    }

    private var matchOptionsTitle: String {
        switch candidate.matchResult {
        case .singleMatch:
            return "Matched Game"
        case .multipleMatches(let matches):
            return "Select Game (\(matches.count) options)"
        case .noMatches:
            return "No Games Found"
        }
    }

    @ViewBuilder
    private var matchOptionsContent: some View {
        switch candidate.matchResult {
        case .singleMatch(let match):
            gameMatchRow(match, isSelected: true)

        case .multipleMatches(let matches):
            VStack(spacing: Theme.Spacing.sm) {
                ForEach(matches) { match in
                    Button {
                        selectedMatch = match
                    } label: {
                        gameMatchRow(match, isSelected: selectedMatch?.id == match.id)
                    }
                    .buttonStyle(.plain)
                    .accessibilityValue(selectedMatch?.id == match.id ? "Selected" : "Not selected")
                    .accessibilityAddTraits(selectedMatch?.id == match.id ? .isSelected : [])
                }
            }

        case .noMatches(let reason):
            HStack {
                Image(systemName: "exclamationmark.triangle.fill")
                    .foregroundStyle(.red)
                Text(reason.description)
                    .font(.body)
                    .foregroundStyle(Theme.textSecondary(colorScheme))
            }
            .padding(Theme.Spacing.md)
        }
    }

    private func gameMatchRow(_ match: GameMatchCandidate, isSelected: Bool) -> some View {
        HStack {
            VStack(alignment: .leading, spacing: 4) {
                HStack {
                    Text(match.fullMatchupDescription)
                        .font(.body)
                        .foregroundStyle(Theme.textPrimary(colorScheme))

                    Image(systemName: match.game.sport.iconName)
                        .font(.caption)
                        .foregroundStyle(match.game.sport.themeColor)
                        .accessibilityHidden(true)
                }

                Text(match.gameDateTime)
                    .font(.subheadline)
                    .foregroundStyle(Theme.textSecondary(colorScheme))

                // Confidence
                HStack(spacing: 4) {
                    Circle()
                        .fill(combinedConfidenceColor(match.confidence.combined))
                        .frame(width: 8, height: 8)
                        .accessibilityLabel(confidenceAccessibilityLabel(match.confidence.combined))
                    Text(match.confidence.combined.description)
                        .font(.caption2)
                        .foregroundStyle(Theme.textMuted(colorScheme))
                }
            }

            Spacer()

            // Selection indicator
            Image(systemName: isSelected ? "checkmark.circle.fill" : "circle")
                .font(.title2)
                .foregroundStyle(isSelected ? .green : Theme.textMuted(colorScheme))
                .accessibilityHidden(true)
        }
        .padding(Theme.Spacing.md)
        .background(isSelected ? Theme.cardBackgroundElevated(colorScheme) : Color.clear)
        .clipShape(RoundedRectangle(cornerRadius: Theme.CornerRadius.small))
        .overlay {
            if isSelected {
                RoundedRectangle(cornerRadius: Theme.CornerRadius.small)
                    .stroke(.green.opacity(0.5), lineWidth: 2)
            }
        }
    }

    // MARK: - Action Buttons

    private var actionButtons: some View {
        VStack(spacing: Theme.Spacing.sm) {
            // Confirm button
            Button {
                if let match = selectedMatch {
                    onConfirm(match)
                    dismiss()
                }
            } label: {
                HStack {
                    Image(systemName: "checkmark.circle.fill")
                    Text("Confirm & Import")
                }
                .font(.body)
                .foregroundStyle(.white)
                .frame(maxWidth: .infinity)
                .padding(Theme.Spacing.md)
                .background(selectedMatch != nil ? .green : Theme.textMuted(colorScheme))
                .clipShape(RoundedRectangle(cornerRadius: Theme.CornerRadius.medium))
            }
            .disabled(selectedMatch == nil)

            // Skip button
            Button {
                onSkip()
                dismiss()
            } label: {
                Text("Skip This Photo")
                    .font(.body)
                    .foregroundStyle(Theme.textSecondary(colorScheme))
            }
        }
    }

    // MARK: - Helpers

    private func formatDate(_ date: Date) -> String {
        let formatter = DateFormatter()
        formatter.dateStyle = .long
        formatter.timeStyle = .short
        return formatter.string(from: date)
    }

    private func confidenceColor(_ confidence: MatchConfidence) -> Color {
        switch confidence {
        case .high: return .green
        case .medium: return Theme.warmOrange
        case .low: return .red
        case .none: return Theme.textMuted(colorScheme)
        }
    }

    private func combinedConfidenceColor(_ confidence: CombinedConfidence) -> Color {
        switch confidence {
        case .autoSelect: return .green
        case .userConfirm: return Theme.warmOrange
        case .manualOnly: return .red
        }
    }

    private func confidenceAccessibilityLabel(_ confidence: CombinedConfidence) -> String {
        switch confidence {
        case .autoSelect: return "High confidence"
        case .userConfirm: return "Medium confidence"
        case .manualOnly: return "Low confidence"
        }
    }
}

// MARK: - Preview

#Preview {
    let metadata = PhotoMetadata(
        captureDate: Date(),
        coordinates: nil
    )
    let candidate = PhotoImportCandidate(
        metadata: metadata,
        matchResult: .noMatches(.metadataMissing(.noLocation)),
        stadiumMatches: []
    )

    GameMatchConfirmationView(
        candidate: candidate,
        onConfirm: { _ in },
        onSkip: {}
    )
}