import SwiftUI
import Combine

// MARK: - MomentDetailViewModel

@MainActor
final class MomentDetailViewModel: ObservableObject {
    // MARK: - Published Properties
    @Published var moment: MomentsInfo
    @Published var isLikeLoading = false
    @Published var localIsLike: Bool
    @Published var localLikeCount: Int
    @Published var showImagePreview = false
    @Published var images: [String] = []
    @Published var currentIndex: Int = 0
    
    // MARK: - Private Properties
    private var cancellables = Set<AnyCancellable>()
    
    // MARK: - Initialization
    init(moment: MomentsInfo) {
        self.moment = moment
        self.localIsLike = moment.isLike
        self.localLikeCount = moment.likeCount
        self.images = moment.dynamicResList?.compactMap { $0.resUrl } ?? []
        
        debugInfoSync("📱 MomentDetailViewModel: 初始化")
        debugInfoSync("   动态ID: \(moment.dynamicId)")
        debugInfoSync("   用户: \(moment.nick)")
        debugInfoSync("   图片数量: \(images.count)")
    }
    
    // MARK: - Public Methods
    func onImageTap(_ index: Int) {
        currentIndex = index
        showImagePreview = true
        debugInfoSync("📸 MomentDetailViewModel: 图片被点击，索引: \(index)")
    }
    
    func like() {
        guard !isLikeLoading, moment.status != 0 else {
            debugInfoSync("⏸️ MomentDetailViewModel: 跳过点赞 - 正在加载: \(isLikeLoading), 审核中: \(moment.status == 0)")
            return
        }
        
        isLikeLoading = true
        debugInfoSync("📡 MomentDetailViewModel: 开始点赞操作")
        
        Task {
            do {
                // 获取当前用户ID
                guard let uidStr = await UserInfoManager.getCurrentUserId(),
                      let uid = Int(uidStr) else {
                    await MainActor.run {
                        isLikeLoading = false
                    }
                    setAPILoadingErrorSync(UUID(), errorMessage: "无法获取用户信息，请重新登录")
                    return
                }
                
                // 确定请求参数
                let status = localIsLike ? 0 : 1 // 0: 取消点赞, 1: 点赞
                
                // 创建 API 服务实例
                let api = LiveAPIService()
                
                // 创建请求
                let request = LikeDynamicRequest(
                    dynamicId: moment.dynamicId,
                    uid: uid,
                    status: status,
                    likedUid: moment.uid,
                    worldId: moment.worldId
                )
                
                debugInfoSync("📡 MomentDetailViewModel: 发送点赞请求")
                debugInfoSync("   动态ID: \(moment.dynamicId)")
                debugInfoSync("   当前状态: \(localIsLike)")
                debugInfoSync("   请求状态: \(status)")
                
                // 发起请求
                let response: LikeDynamicResponse = try await api.request(request)
                
                await MainActor.run {
                    isLikeLoading = false
                    // 处理响应
                    if response.code == 200 {
                        localIsLike.toggle()
                        localLikeCount += localIsLike ? 1 : -1
                        debugInfoSync("✅ MomentDetailViewModel: 点赞操作成功")
                        debugInfoSync("   动态ID: \(moment.dynamicId)")
                        debugInfoSync("   新状态: \(localIsLike)")
                        debugInfoSync("   新数量: \(localLikeCount)")
                    } else {
                        let errorMessage = response.message.isEmpty ? "点赞失败，请重试" : response.message
                        setAPILoadingErrorSync(UUID(), errorMessage: errorMessage)
                        debugErrorSync("❌ MomentDetailViewModel: 点赞操作失败")
                        debugErrorSync("   动态ID: \(moment.dynamicId)")
                        debugErrorSync("   错误: \(errorMessage)")
                    }
                }
                
            } catch {
                await MainActor.run {
                    isLikeLoading = false
                }
                setAPILoadingErrorSync(UUID(), errorMessage: error.localizedDescription)
                debugErrorSync("❌ MomentDetailViewModel: 点赞请求异常")
                debugErrorSync("   动态ID: \(moment.dynamicId)")
                debugErrorSync("   错误: \(error.localizedDescription)")
            }
        }
    }
}