/**
 * 素材相关 API
 * Phase 1 重构：去掉 project_id，素材直接归属用户
 */
import apiClient from "./client"
import { getOrCreateDefaultProject } from "./projects"

/** 素材元数据 */
export interface AssetMetadata {
  /** 时长（秒） */
  duration?: number
  /** 宽度（像素） */
  width?: number
  /** 高度（像素） */
  height?: number
  /** 比特率（bps） */
  bitrate?: number
  /** 编码格式 */
  codec?: string
  /** 帧率 */
  fps?: number
  /** 采样率（Hz） */
  sample_rate?: number
  /** 声道数 */
  channels?: number
  /** 其他扩展字段 */
  [key: string]: unknown
}

/** 素材分类状态 */
export type AssetClassificationStatus = "pending" | "processing" | "completed" | "failed"

/** 素材条目 */
export interface AssetItem {
  id: string
  library_id: string
  name: string
  storage_key: string
  mime_type: string
  metadata: AssetMetadata
  file_size?: number
  file_url?: string
  thumbnail_url?: string
  /** 时长（秒），视频/音频素材由后端从 metadata 提取到顶层 */
  duration?: number
  status?: string
  classification_status?: AssetClassificationStatus | null
  quality_score?: number | null
  tag_ids?: string[]
  created_at?: string
}

/** 素材库 */
export interface AssetLibraryItem {
  id: string
  name: string
  kind: "video" | "voice" | "image"
  asset_count?: number
  total_size?: number
  created_at?: string
}

/** 入库任务 */
export interface IngestJob {
  id: string
  library_id: string
  storage_key: string
  status: "pending" | "processing" | "completed" | "failed"
  error_message: string
  result_asset_id: string
}

/** 分类任务 */
export interface ClassificationJob {
  id: string
  asset_id: string
  status: "pending" | "processing" | "completed" | "failed"
  classification: string
  confidence: number
  error_message: string
}

/** 素材诊断信息 */
export interface AssetDiagnosis {
  readiness_score: number
  readiness_label: string
  total_assets: number
  ready_assets: number
  video_assets: number
  image_assets: number
  voice_assets: number
  total_duration_seconds: number
  estimated_video_count: number
  used_assets: number
  unused_assets: number
  pending_review_assets: number
  smart_views: Array<{
    key: string
    label: string
    count: number
    description: string
  }>
  gaps: Array<{
    key: string
    severity: "critical" | "warning" | "info"
    message: string
    recommendation: string
  }>
}

// ─── 素材诊断 ──────────────────────────────────────────────

/** 获取素材诊断信息（可选 asset_id 查单素材，否则全局诊断） */
export const getAssetDiagnosis = async (assetId?: string): Promise<AssetDiagnosis> => {
  const params: Record<string, string> = {}
  if (assetId) params.asset_id = assetId
  const response = await apiClient.get("/asset-diagnosis", { params })
  return response.data
}

// ─── 素材库 ────────────────────────────────────────────────

/** 获取当前用户的所有素材库 */
export const getAssetLibraries = async (): Promise<AssetLibraryItem[]> => {
  const response = await apiClient.get("/asset-libraries")
  return response.data.items || []
}

/** 创建素材库（自动获取或创建默认项目以提供 project_id） */
export const createAssetLibrary = async (data: {
  name: string
  kind: "video" | "voice" | "image"
}): Promise<AssetLibraryItem> => {
  // 后端要求 project_id，前端自动管理默认项目
  const project = await getOrCreateDefaultProject()
  const response = await apiClient.post("/asset-libraries", {
    project_id: project.id,
    ...data,
  })
  return response.data
}

/** 确保项目下指定 kind 的默认素材库存在（不存在则自动创建） */
export const ensureDefaultLibrary = async (data: {
  project_id: string
  kind: "video" | "voice" | "image"
}): Promise<AssetLibraryItem> => {
  const response = await apiClient.post("/asset-libraries/ensure-default", data)
  return response.data
}

/** 删除素材库 */
export const deleteAssetLibrary = async (libraryId: string): Promise<void> => {
  await apiClient.delete(`/asset-libraries/${libraryId}`)
}

// ─── 素材 ──────────────────────────────────────────────────

/** 获取素材库下的所有素材 */
export const getAssets = async (
  libraryId: string,
  options?: { status?: string; page?: number; page_size?: number },
): Promise<{ items: AssetItem[]; total: number }> => {
  const params: Record<string, string | number> = { library_id: libraryId }
  // 默认拉取所有非删除状态的素材（ready/ingesting/processing/uploading/error/failed）
  // 让用户能看到"处理中"的素材，不会以为上传失败了
  if (options?.status) {
    params.status = options.status
  }
  if (options?.page) params.page = options.page
  if (options?.page_size) params.page_size = options.page_size
  const response = await apiClient.get("/assets", { params })
  const data = response.data || {}
  const items: AssetItem[] = data.items || []
  const total: number = typeof data.total === "number" ? data.total : items.length
  return { items, total }
}

/** 按类型获取素材（如 voice/video/image），支持可选筛选 */
export const getAssetsByKind = async (
  kind: string,
  filters?: {
    keyword?: string
    gender?: string
    style?: string
    tag_ids?: string[]
    limit?: number
    page?: number
    page_size?: number
  },
): Promise<AssetItem[]> => {
  const params: Record<string, string | number> = { kind }
  if (filters?.keyword) params.keyword = filters.keyword
  if (filters?.gender) params.gender = filters.gender
  if (filters?.style) params.style = filters.style
  if (filters?.tag_ids?.length) params.tag_ids = filters.tag_ids.join(",")
  if (filters?.limit) params.limit = filters.limit
  if (filters?.page) params.page = filters.page
  if (filters?.page_size) params.page_size = filters.page_size
  const response = await apiClient.get("/assets", { params })
  return response.data.items || []
}

/** 创建素材（上传文件后调用，附带 metadata） */
export const createAsset = async (data: {
  library_id: string
  name: string
  storage_key: string
  mime_type: string
  metadata?: AssetMetadata
}): Promise<AssetItem> => {
  const response = await apiClient.post("/assets", data)
  return response.data
}

/** 更新素材（名称、metadata 等） */
export const updateAsset = async (
  assetId: string,
  data: { name?: string; metadata?: AssetMetadata },
): Promise<AssetItem> => {
  const response = await apiClient.put(`/assets/${assetId}`, data)
  return response.data
}

/** 更新素材审核状态 */
export const updateAssetReviewStatus = async (
  assetId: string,
  reviewStatus: "pending_review" | "approved" | "rejected",
): Promise<AssetItem> => {
  const response = await apiClient.patch(`/assets/${assetId}/review`, {
    review_status: reviewStatus,
  })
  return response.data
}

/** 删除素材 */
export const deleteAsset = async (assetId: string): Promise<void> => {
  await apiClient.delete(`/assets/${assetId}`)
}

// ─── 上传 ──────────────────────────────────────────────────

/** 表单上传素材（小文件） */
export const uploadAsset = async (
  formData: FormData,
): Promise<{ storage_key: string; ingest_job_id: string; url: string }> => {
  const response = await apiClient.post("/upload", formData, {
    headers: { "Content-Type": "multipart/form-data" },
    timeout: 30 * 60 * 1000,
  })
  return response.data
}

/** 预签名直传准备 */
export const prepareDirectUpload = async (data: {
  project_id: string
  library_id: string
  filename: string
  content_type: string
  file_size: number
}): Promise<{
  upload_url: string
  method: string
  storage_key: string
  expires_at: string
  fields: Record<string, string>
  max_size_bytes: number
}> => {
  const response = await apiClient.post("/upload/direct/prepare", data)
  return response.data
}

/** 直传完成确认 */
export const completeDirectUpload = async (data: {
  project_id: string
  library_id: string
  storage_key: string
}): Promise<{ storage_key: string; ingest_job_id: string }> => {
  const response = await apiClient.post("/upload/direct/complete", data)
  return response.data
}

/** 直传上传（大文件推荐），支持可选进度回调 */
export const uploadAssetDirect = async (data: {
  file: File
  library_id: string
  onProgress?: (percent: number) => void
}): Promise<{ storage_key: string; ingest_job_id: string }> => {
  // 后端要求 project_id，前端自动获取默认项目
  const project = await getOrCreateDefaultProject()

  const prepared = await prepareDirectUpload({
    project_id: project.id,
    library_id: data.library_id,
    filename: data.file.name,
    content_type: data.file.type || "application/octet-stream",
    file_size: data.file.size,
  })

  const directForm = new FormData()
  Object.entries(prepared.fields).forEach(([key, value]) => directForm.append(key, value))
  directForm.append("file", data.file)

  // 使用 XMLHttpRequest 以获取上传进度 + 超时控制 + 详细错误诊断
  await new Promise<void>((resolve, reject) => {
    const xhr = new XMLHttpRequest()
    xhr.open(prepared.method, prepared.upload_url)

    // 超时 10 分钟
    xhr.timeout = 10 * 60 * 1000

    xhr.upload.onprogress = (e) => {
      if (e.lengthComputable && data.onProgress) {
        data.onProgress(Math.round((e.loaded / e.total) * 100))
      }
    }
    xhr.onload = () => {
      if (xhr.status >= 200 && xhr.status < 300) {
        resolve()
      } else {
        // 解析 OSS 返回的 XML 错误信息
        let ossError = ""
        try {
          const codeMatch = xhr.responseText.match(/<Code>([^<]+)<\/Code>/)
          const msgMatch = xhr.responseText.match(/<Message>([^<]+)<\/Message>/)
          if (codeMatch || msgMatch) {
            ossError = ` [OSS: ${codeMatch?.[1] || "unknown"} - ${msgMatch?.[1] || "unknown"}]`
          }
        } catch {
          // 无法解析响应体
        }
        const detail = `OSS 直传失败: HTTP ${xhr.status} ${xhr.statusText}${ossError}`
        console.error("[OSS Upload] 直传失败:", {
          url: prepared.upload_url,
          storage_key: prepared.storage_key,
          status: xhr.status,
          statusText: xhr.statusText,
        })
        reject(new Error(detail))
      }
    }
    xhr.onerror = () => {
      console.error("[OSS Upload] 网络错误:", {
        url: prepared.upload_url,
        storage_key: prepared.storage_key,
      })
      reject(new Error("OSS 上传网络错误，请检查网络连接"))
    }
    xhr.ontimeout = () => {
      console.error("[OSS Upload] 上传超时:", {
        url: prepared.upload_url,
        storage_key: prepared.storage_key,
      })
      reject(new Error("OSS 上传超时（10分钟），请检查网络或尝试更小的文件"))
    }
    xhr.send(directForm)
  })

  return completeDirectUpload({
    project_id: project.id,
    library_id: data.library_id,
    storage_key: prepared.storage_key,
  })
}

// ─── 入库 / 分类任务 ───────────────────────────────────────

/** 查询入库任务状态 */
export const getIngestJob = async (jobId: string): Promise<IngestJob> => {
  const response = await apiClient.get(`/ingest-jobs/${jobId}`)
  return response.data
}

/** 提交素材分类任务 */
export const submitClassificationJob = async (data: {
  asset_id: string
}): Promise<ClassificationJob> => {
  const response = await apiClient.post("/classification-jobs", data)
  return response.data
}

/** 查询分类任务状态 */
export const getClassificationJob = async (jobId: string): Promise<ClassificationJob> => {
  const response = await apiClient.get(`/classification-jobs/${jobId}`)
  return response.data
}

// ─── 批量操作 ───────────────────────────────────────────────

/** 批量操作结果 */
export interface BatchOperationResult {
  succeeded: string[]
  failed: string[]
  total: number
  success_count: number
  failure_count: number
}

/** 统一批量操作结果归一化，防御后端字段缺失或格式不一致 */
const normalizeBatchResult = (raw: Record<string, unknown>): BatchOperationResult => {
  const succeeded = Array.isArray(raw.succeeded) ? (raw.succeeded as string[]) : []
  const failed = Array.isArray(raw.failed) ? (raw.failed as string[]) : []
  const success_count = typeof raw.success_count === "number" ? raw.success_count : succeeded.length
  const failure_count = typeof raw.failure_count === "number" ? raw.failure_count : failed.length
  const total = typeof raw.total === "number" ? raw.total : success_count + failure_count
  return { succeeded, failed, total, success_count, failure_count }
}

/** 批量删除素材 */
export const batchDeleteAssets = async (assetIds: string[]): Promise<BatchOperationResult> => {
  const response = await apiClient.post("/assets/batch-delete", {
    asset_ids: assetIds,
  })
  return normalizeBatchResult((response.data || {}) as Record<string, unknown>)
}

/** 批量打标签 */
export const batchTagAssets = async (data: {
  asset_ids: string[]
  tags: string[]
  mode: "add" | "replace"
}): Promise<BatchOperationResult> => {
  const response = await apiClient.post("/assets/batch-tag", data)
  return normalizeBatchResult((response.data || {}) as Record<string, unknown>)
}

/** 批量改分类 */
export const batchClassifyAssets = async (data: {
  asset_ids: string[]
  category: string
}): Promise<BatchOperationResult> => {
  const response = await apiClient.post("/assets/batch-classify", data)
  return normalizeBatchResult((response.data || {}) as Record<string, unknown>)
}

/** 批量智能标记 */
export const batchMarkAssets = async (data: {
  asset_ids: string[]
  smart_view: "recommended" | "caution" | "high_risk"
}): Promise<BatchOperationResult> => {
  const response = await apiClient.post("/assets/batch-mark", data)
  return normalizeBatchResult((response.data || {}) as Record<string, unknown>)
}