//
//  WiredTransferPhotoRow.swift
//  suixinkan
//

import Kingfisher
import SwiftUI
import UIKit

/// 有线传图照片列表行。
struct WiredTransferPhotoRow: View {
    let photo: WiredTransferPhotoItem
    let selectUploadMode: Bool
    let selected: Bool
    let onToggleSelection: () -> Void
    let onPhotoClick: () -> Void
    let onRetry: () -> Void
    let onDelete: () -> Void

    private var canSelect: Bool { photo.canSelectForSpecifyUpload }
    private var canRetry: Bool { photo.status == .failed || photo.status == .pending }
    private var rowOpacity: Double { selectUploadMode && !canSelect ? 0.45 : 1 }
    private var showsProgress: Bool { photo.status == .transferring || photo.status == .uploading }

    var body: some View {
        HStack(alignment: .center, spacing: 8) {
            HStack(alignment: .center, spacing: 8) {
                if selectUploadMode {
                    WiredTransferSelectIndicator(selected: selected, enabled: canSelect)
                }

                thumbnailView
                    .frame(width: WiredTransferDesign.thumbnailSize, height: WiredTransferDesign.thumbnailSize)
                    .clipShape(RoundedRectangle(cornerRadius: WiredTransferDesign.thumbnailCornerRadius))
                    .opacity(rowOpacity)

                VStack(alignment: .leading, spacing: 5) {
                    HStack(spacing: 4) {
                        Text(photo.fileName)
                            .font(.system(size: 12, weight: .medium))
                            .foregroundStyle(WiredTransferDesign.text333.opacity(rowOpacity))
                            .lineLimit(1)
                        Spacer(minLength: 0)
                        WiredTransferStatusBadge(status: photo.status)
                            .opacity(rowOpacity)
                    }
                    Text(metaText)
                        .font(.system(size: 10))
                        .foregroundStyle(WiredTransferDesign.text999.opacity(rowOpacity))
                        .lineLimit(1)
                    progressSlot
                }
            }
            .frame(maxWidth: .infinity, alignment: .leading)
            .contentShape(Rectangle())
            .onTapGesture {
                if selectUploadMode {
                    if canSelect { onToggleSelection() }
                } else {
                    onPhotoClick()
                }
            }

            if !selectUploadMode {
                Menu {
                    Button("重传") { onRetry() }
                        .disabled(!canRetry)
                    Button("删除", role: .destructive) { onDelete() }
                } label: {
                    Image(systemName: "ellipsis")
                        .font(.system(size: 16))
                        .foregroundStyle(WiredTransferDesign.text666)
                        .frame(width: 32, height: 32)
                        .rotationEffect(.degrees(90))
                }
            }
        }
        .frame(height: WiredTransferDesign.photoRowHeight)
        .padding(.horizontal, 10)
    }

    private var metaText: String {
        if photo.resolutionText.isEmpty { return photo.fileSizeText }
        return "\(photo.fileSizeText) \(photo.resolutionText)"
    }

    private var progressSlot: some View {
        ProgressView(value: showsProgress ? Double(photo.progress) : 0, total: 100)
            .tint(AppDesign.primary)
            .opacity(showsProgress ? 1 : 0)
            .frame(height: WiredTransferDesign.progressBarHeight)
    }

    @ViewBuilder
    private var thumbnailView: some View {
        if let url = URL(string: photo.thumbnailURL), !photo.thumbnailURL.isEmpty {
            KFImage(url)
                .placeholder { thumbnailPlaceholder }
                .setProcessor(
                    DownsamplingImageProcessor(
                        size: CGSize(
                            width: WiredTransferDesign.thumbnailSize,
                            height: WiredTransferDesign.thumbnailSize
                        )
                    )
                )
                .scaleFactor(UIScreen.main.scale)
                .resizable()
                .aspectRatio(contentMode: .fill)
        } else {
            thumbnailPlaceholder
        }
    }

    private var thumbnailPlaceholder: some View {
        WiredTransferDesign.pageBackground
            .overlay {
                Image(systemName: "photo")
                    .foregroundStyle(WiredTransferDesign.text999)
            }
    }
}