import SwiftUI

/// Compact track row for track lists.
struct TrackRow: View {
    let track: Track

    var body: some View {
        HStack(spacing: 8) {
            // Album art placeholder / format badge
            ZStack {
                RoundedRectangle(cornerRadius: 4)
                    .fill(trackColor.opacity(0.15))
                    .frame(width: 32, height: 32)

                Image(systemName: "music.note")
                    .font(.caption)
                    .foregroundStyle(trackColor)
            }

            VStack(alignment: .leading, spacing: 1) {
                HStack(spacing: 4) {
                    Text(track.title)
                        .lineLimit(1)
                        .font(.body)
                    trackStateIcon
                }

                if !track.artist.isEmpty {
                    Text(track.artist)
                        .lineLimit(1)
                        .font(.caption)
                        .foregroundStyle(.secondary)
                }
            }
        }
    }

    /// Priority-ordered state icon for upload/download/cloud status.
    @ViewBuilder
    private var trackStateIcon: some View {
        if track.uploadState == .uploading {
            Image(systemName: "arrow.up.circle.fill")
                .font(.system(size: 11))
                .foregroundStyle(.orange)
        } else if track.uploadState == .error {
            Image(systemName: "exclamationmark.circle.fill")
                .font(.system(size: 11))
                .foregroundStyle(.red)
        } else if track.isCloud && track.downloadState == .downloading {
            Image(systemName: "arrow.down.circle")
                .font(.system(size: 11))
                .foregroundStyle(Color.accentColor)
        } else if track.isCloud && track.downloadState == .error {
            Image(systemName: "exclamationmark.circle.fill")
                .font(.system(size: 11))
                .foregroundStyle(.red)
        } else if track.isCloud && (track.downloadState == .downloaded || track.localCachePath != nil) {
            Image(systemName: "arrow.down.circle.fill")
                .font(.system(size: 11))
                .foregroundStyle(.green)
        } else if track.uploadState == .uploaded {
            Image(systemName: "arrow.up.circle.fill")
                .font(.system(size: 11))
                .foregroundStyle(.green)
        } else if track.isCloud {
            Image(systemName: "cloud.fill")
                .font(.system(size: 11))
                .foregroundStyle(Color.accentColor.opacity(0.85))
        }
    }

    private var trackColor: Color {
        if let hex = track.color {
            return Color(hex: hex) ?? .accentColor
        }
        return .accentColor
    }
}