import SwiftUI

struct ContentCardView: View {
    let item: ContentItem

    #if os(tvOS)
    private let cardWidth: CGFloat = 250
    #else
    private let cardWidth: CGFloat = 140
    #endif
    private let aspectRatio: CGFloat = 2.0 / 3.0

    #if os(tvOS)
    @Environment(\.isFocused) private var isFocused
    #endif

    var body: some View {
        VStack(alignment: .leading, spacing: 6) {
            // 海报
            ZStack(alignment: .topLeading) {
                posterImage
                    .frame(width: cardWidth, height: cardWidth / aspectRatio)
                    .clipShape(RoundedRectangle(cornerRadius: 8))

                // 评分角标
                if let rating = item.rating, rating > 0 {
                    Text(String(format: "%.1f", rating))
                        .font(.caption2)
                        .fontWeight(.bold)
                        .foregroundStyle(.white)
                        .padding(.horizontal, 6)
                        .padding(.vertical, 2)
                        .background(.orange.gradient, in: RoundedRectangle(cornerRadius: 4))
                        .padding(6)
                        .frame(maxWidth: .infinity, alignment: .topTrailing)
                }

                // 状态徽章
                if let badge = item.badges.first {
                    Text(badge)
                        .font(.caption2)
                        .foregroundStyle(.white)
                        .padding(.horizontal, 6)
                        .padding(.vertical, 2)
                        .background(.blue.gradient, in: RoundedRectangle(cornerRadius: 4))
                        .padding(6)
                }
            }

            // 标题
            Text(item.title)
                .font(.caption)
                .fontWeight(.medium)
                .lineLimit(2)
                .frame(width: cardWidth, alignment: .leading)

            // 年份
            if item.year > 0 {
                Text("\(String(item.year))")
                    .font(.caption2)
                    .foregroundStyle(.secondary)
            }
        }
        .frame(width: cardWidth)
        #if os(tvOS)
        .scaleEffect(isFocused ? 1.1 : 1.0)
        .shadow(color: isFocused ? .blue.opacity(0.4) : .clear, radius: 10)
        .animation(.easeInOut(duration: 0.2), value: isFocused)
        #endif
    }

    @ViewBuilder
    private var posterImage: some View {
        CachedAsyncImage(url: item.posterURL) {
            posterPlaceholder
        }
    }

    private var posterPlaceholder: some View {
        Rectangle()
            .fill(.quaternary)
            .overlay {
                Image(systemName: "film")
                    .font(.title)
                    .foregroundStyle(.tertiary)
            }
    }
}