//
//  ProgressCardGenerator.swift
//  SportsTime
//
//  Generates shareable stadium progress cards.
//

import SwiftUI
import UIKit

// MARK: - Progress Share Content

struct ProgressShareContent: ShareableContent {
    let progress: LeagueProgress
    let tripCount: Int
    let username: String?

    var cardType: ShareCardType { .stadiumProgress }

    @MainActor
    func render(theme: ShareTheme) async throws -> UIImage {
        let mapGenerator = ShareMapSnapshotGenerator()
        let mapSnapshot = await mapGenerator.generateProgressMap(
            visited: progress.stadiumsVisited,
            remaining: progress.stadiumsRemaining,
            theme: theme
        )

        let cardView = ProgressCardView(
            progress: progress,
            tripCount: tripCount,
            username: username,
            theme: theme,
            mapSnapshot: mapSnapshot
        )

        let renderer = ImageRenderer(content: cardView)
        renderer.scale = 3.0

        guard let image = renderer.uiImage else {
            throw ShareError.renderingFailed
        }

        return image
    }
}

// MARK: - Progress Card View

private struct ProgressCardView: View {
    let progress: LeagueProgress
    let tripCount: Int
    let username: String?
    let theme: ShareTheme
    let mapSnapshot: UIImage?

    var body: some View {
        ZStack {
            ShareCardBackground(theme: theme)

            VStack(spacing: 40) {
                ShareCardHeader(
                    title: "\(progress.sport.displayName) Stadium Quest",
                    sport: progress.sport,
                    theme: theme
                )

                Spacer()

                // Progress ring
                ShareProgressRing(
                    current: progress.visitedStadiums,
                    total: progress.totalStadiums,
                    theme: theme
                )

                Text("\(Int(progress.completionPercentage))% Complete")
                    .font(.system(size: 28, weight: .medium))
                    .foregroundStyle(theme.secondaryTextColor)

                // Stats row
                ShareStatsRow(
                    stats: [
                        (value: "\(progress.visitedStadiums)", label: "visited"),
                        (value: "\(progress.totalStadiums - progress.visitedStadiums)", label: "remain"),
                        (value: "\(tripCount)", label: "trips")
                    ],
                    theme: theme
                )

                // Map
                if let snapshot = mapSnapshot {
                    Image(uiImage: snapshot)
                        .resizable()
                        .aspectRatio(contentMode: .fit)
                        .frame(maxWidth: 960)
                        .clipShape(RoundedRectangle(cornerRadius: 20))
                        .overlay {
                            RoundedRectangle(cornerRadius: 20)
                                .stroke(theme.accentColor.opacity(0.3), lineWidth: 2)
                        }
                }

                Spacer()

                ShareCardFooter(theme: theme, username: username)
            }
            .padding(ShareCardDimensions.padding)
        }
        .frame(
            width: ShareCardDimensions.cardSize.width,
            height: ShareCardDimensions.cardSize.height
        )
    }
}