import SwiftUI

struct AlternativeCard: View {
    let alternative: Alternative

    var body: some View {
        HStack(spacing: 12) {
            // Product Image
            if let imageURL = alternative.product.imageURL {
                AsyncImage(url: imageURL) { phase in
                    switch phase {
                    case .success(let image):
                        image
                            .resizable()
                            .aspectRatio(contentMode: .fill)
                    case .failure:
                        imagePlaceholder
                    default:
                        ProgressView()
                    }
                }
                .frame(width: 80, height: 80)
                .background(Color(.systemGray6))
                .cornerRadius(12)
                .clipped()
            } else {
                imagePlaceholder
                    .frame(width: 80, height: 80)
            }

            // Product Info
            VStack(alignment: .leading, spacing: 6) {
                Text(alternative.product.brand)
                    .font(.caption)
                    .foregroundColor(.secondary)

                Text(alternative.product.name)
                    .font(.subheadline.bold())
                    .lineLimit(2)

                HStack(spacing: 12) {
                    // Score
                    HStack(spacing: 4) {
                        Circle()
                            .fill(scoreColor(alternative.product.score))
                            .frame(width: 10, height: 10)
                        Text("\(alternative.product.score)")
                            .font(.caption.bold())
                    }

                    // NOVA
                    Text("NOVA \(alternative.product.novaGroup)")
                        .font(.caption)
                        .foregroundColor(.secondary)

                    // Price
                    if let price = alternative.formattedPrice {
                        Text(price)
                            .font(.caption.bold())
                            .foregroundColor(.green)
                    }

                    // Distance
                    if let distance = alternative.formattedDistance {
                        Text(distance)
                            .font(.caption)
                            .foregroundColor(.secondary)
                    }
                }
            }

            Spacer()

            // Score Ring (mini)
            ZStack {
                Circle()
                    .stroke(lineWidth: 4)
                    .opacity(0.2)
                    .foregroundColor(scoreColor(alternative.product.score))

                Circle()
                    .trim(from: 0, to: Double(alternative.product.score) / 100.0)
                    .stroke(style: StrokeStyle(lineWidth: 4, lineCap: .round))
                    .foregroundColor(scoreColor(alternative.product.score))
                    .rotationEffect(.degrees(-90))

                Text("\(alternative.product.score)")
                    .font(.caption2.bold())
            }
            .frame(width: 40, height: 40)
        }
        .padding()
        .background(Color(.secondarySystemBackground))
        .cornerRadius(16)
    }

    private var imagePlaceholder: some View {
        ZStack {
            Color(.systemGray5)
            Image(systemName: "carrot.fill")
                .foregroundColor(.gray)
        }
        .cornerRadius(12)
    }

    private func scoreColor(_ score: Int) -> Color {
        switch score {
        case 80...100: return .green
        case 50..<80: return .yellow
        case 30..<50: return .orange
        default: return .red
        }
    }
}