import SwiftUI
import os.log

public struct ExampleView: View {
    @StateObject private var mediaUploader = MediaUploader(
        maxSelection: 5,
        onUploadComplete: { _ in },
        uploadFunction: { media, progress in
            // 模拟上传进度
            for i in 0...10 {
                try await Task.sleep(nanoseconds: 100_000_000) // 0.1秒
                progress(Double(i) / 10.0)
            }
            
            // 这里替换为您的实际上传逻辑
            switch media {
            case .image(let image):
                // 上传图片
                guard let url = URL(string: "https://example.com/images/\(UUID().uuidString).jpg") else {
                    throw NSError(domain: "com.example.app", code: -1, userInfo: [NSLocalizedDescriptionKey: "Invalid URL"])
                }
                return url
            case .video(let url, _):
                // 上传视频
                guard let url = URL(string: "https://example.com/videos/\(UUID().uuidString).mp4") else {
                    throw NSError(domain: "com.example.app", code: -1, userInfo: [NSLocalizedDescriptionKey: "Invalid URL"])
                }
                return url
            }
        }
    )
    @State private var uploadedURLs: [URL] = []
    @EnvironmentObject private var authState: AuthState
    
    public init() {}
    
    public var body: some View {
        NavigationView {
            VStack {
                // 添加媒体按钮
                Button(action: {
                    mediaUploader.showPicker()
                }) {
                    HStack {
                        Image(systemName: "plus.circle.fill")
                        Text("添加媒体")
                    }
                    .frame(maxWidth: .infinity)
                    .padding()
                    .background(Color.blue)
                    .foregroundColor(.white)
                    .cornerRadius(8)
                }
                .padding(.horizontal)
                
                // 媒体上传组件
                MediaUploaderView(mediaUploader: mediaUploader)
                    .onChange(of: mediaUploader.selectedMedia) { newValue in
                        if !newValue.isEmpty {
                            Task {
                                if let results = await mediaUploader.startUpload() {
                                    let urls = results.map { $0.1 }
                                    uploadedURLs.append(contentsOf: urls)
                                }
                            }
                        }
                    }
                
                // 显示已上传的URL
                List(uploadedURLs, id: \.self) { url in
                    Text(url.absoluteString)
                        .font(.caption)
                        .padding(.vertical, 4)
                }
                .listStyle(PlainListStyle())
            }
            .navigationTitle("媒体上传示例")
        }
    }
    
    // 实际上传函数示例
    private func uploadMedia(_ media: MediaType, progress: @escaping (Double) -> Void) async throws -> URL {
        // 模拟上传进度
        for i in 0...10 {
            try await Task.sleep(nanoseconds: 100_000_000) // 0.1秒
            progress(Double(i) / 10.0)
        }
        
        // 这里替换为您的实际上传逻辑
        switch media {
        case .image(let image):
            // 上传图片
            return URL(string: "https://example.com/images/\(UUID().uuidString).jpg")!
        case .video(let url, _):
            // 上传视频
            return URL(string: "https://example.com/videos/\(UUID().uuidString).mp4")!
        }
    }
}

#Preview {
    ExampleView()
        .environmentObject(AuthState.shared)
}