xiaoxia-saas/apps/web/src/pages/generate/hooks/useGenerateVideo.ts

/**
 * 视频生成 Hook
 * 封装视频生成的核心逻辑、状态管理、轮询等
 */
import { useState, useCallback } from "react"
import { message } from "antd"
import { type GeneratedVideo, getEditPlanClips, createClipsFromAssets } from "@/api/template-editor"
import { createGenerationTask } from "@/api/tasks/tasks"
import type { UseGenerateVideoProps } from "./generate-video/types"
import { getGenerationPhase } from "./generate-video/phase"
import { useGenerationPolling } from "./generate-video/useGenerationPolling"
import { validateGenerateInputs } from "./generate-video/buildPayload"
import { calculateResolution } from "../utils/calculateResolution"
import { extractBackendError, translateError } from "./generate-video/errorUtils"

export function useGenerateVideo(props: UseGenerateVideoProps) {
  const { selectedTemplate, onGenerationSuccess } = props

  /* ── 生成状态 ── */
  const [generating, setGenerating] = useState(false)
  const [progress, setProgress] = useState(0)
  const [generated, setGenerated] = useState(false)
  const [generateError, setGenerateError] = useState<string | null>(null)
  const [generatedVideos, setGeneratedVideos] = useState<GeneratedVideo[]>([])

  const handleProgress = useCallback((p: number) => setProgress(p), [])
  const handleComplete = useCallback(
    (videos: unknown[]) => {
      setGenerating(false)
      setGenerated(true)
      setGeneratedVideos(videos as GeneratedVideo[])
      onGenerationSuccess?.()
    },
    [onGenerationSuccess],
  )
  const handleFailed = useCallback((errorMsg: string) => {
    setGenerating(false)
    setGenerateError(errorMsg)
  }, [])

  const { startPolling, clearTimer } = useGenerationPolling({
    onProgress: handleProgress,
    onComplete: handleComplete,
    onFailed: handleFailed,
  })

  /* ── 生成视频 ──
     返回 true 表示任务创建成功并已开始轮询；false 表示校验未通过或创建失败 */
  const generate = useCallback(async (): Promise<boolean> => {
    const errorMsg = validateGenerateInputs(props)
    if (errorMsg) {
      message.warning(errorMsg)
      return false
    }

    setGenerating(true)
    setProgress(0)
    setGenerated(false)
    setGenerateError(null)
    clearTimer()

    try {
      const { width: outputWidth, height: outputHeight } = calculateResolution(
        props.videoRatio || "9:16",
      )

      const assetIds =
        props.materialMode === "auto" ? props.smartSelectedIds : props.selectedMaterials

      // from-assets 已由 useStep2Materials 在用户选素材时（debounce 800ms）调用，
      // 后端已改为异步秒级返回，这里做一次轻量兜底：
      // 单次查 clips，已有则直接放行；没有则再调一次 from-assets。
      if (assetIds.length > 0 && selectedTemplate) {
        try {
          const clipList = await getEditPlanClips(selectedTemplate, { limit: 500 })
          if (clipList.items.length === 0) {
            // 片段不存在（极端情况：useStep2Materials 的 debounce 还没触发）
            // 手动补一次 from-assets（后端秒级返回）
            await createClipsFromAssets(selectedTemplate, assetIds, "main")
          }
        } catch {
          // 查询失败不阻塞，继续生成
        }
      }

      const hide = message.loading("正在生成预览视频...", 0)

      const coverUrl = props.coverSettings?.thumbnail_url || props.coverSettings?.upload_url || ""

      const voiceLibraryId =
        props.voiceMode === "clone"
          ? props.selectedClonedVoice || props.selectedVoice || ""
          : props.selectedVoice || ""

      try {
        const taskResp = await createGenerationTask({
          template_id: selectedTemplate,
          asset_ids: assetIds,
          output_width: outputWidth,
          output_height: outputHeight,
          cover_url: coverUrl,
          custom_title: props.titleSettings?.title || "",
          duration: props.duration || undefined,
          video_ratio: props.videoRatio,
          voice_library_id: voiceLibraryId,
          ...(props.selectedVoice && !voiceLibraryId ? { voice_ids: [props.selectedVoice] } : {}),
          bgm_config: {
            enabled: props.bgm !== false,
            ...(props.bgmConfig?.music_id ? { preset_id: props.bgmConfig.music_id } : {}),
          },
          ...(props.sourceEditPlanId ? { source_edit_plan_id: props.sourceEditPlanId } : {}),
          ...(props.titleSettings?.title
            ? {
                title_config: {
                  text: props.titleSettings.title,
                  font: props.titleSettings.font,
                  font_size: props.titleSettings.size,
                  font_color: props.titleSettings.color,
                  position: props.titleSettings.position,
                  bold: props.titleSettings.bold,
                  stroke: props.titleSettings.stroke,
                  shadow: props.titleSettings.shadow,
                },
              }
            : {}),
        })
        hide()
        const taskId = taskResp.items?.[0]?.id

        if (!taskId) {
          throw new Error("创建任务成功但未返回任务 ID，请稍后在任务列表查看")
        }
        startPolling(taskId)
      } catch (err) {
        hide()
        throw err
      }
    } catch (err: unknown) {
      console.error("[handleGenerate] 生成失败:", err)
      setGenerating(false)
      const backendMsg = extractBackendError(err)
      console.error("[handleGenerate] 错误信息:", backendMsg, "完整错误:", err)
      const finalMsg = translateError(backendMsg)
      setGenerateError(finalMsg)
      message.error(finalMsg)
      return false
    }
    return true
  }, [props, clearTimer, startPolling, selectedTemplate])

  const retry = useCallback(() => {
    setGenerateError(null)
    generate()
  }, [generate])

  const dismissError = useCallback(() => {
    setGenerateError(null)
  }, [])

  const download = useCallback(async () => {
    if (!generatedVideos.length) return
    const video = generatedVideos[0]
    try {
      const url = video.download_url || video.file_url
      if (url) {
        const a = document.createElement("a")
        a.href = url
        a.download = video.name || "generated-video.mp4"
        a.target = "_blank"
        document.body.appendChild(a)
        a.click()
        document.body.removeChild(a)
      }
    } catch (err) {
      console.error("[下载失败]", err)
      message.error("下载失败，请重试")
    }
  }, [generatedVideos])

  const share = useCallback(async () => {
    if (!generatedVideos.length) return
    const video = generatedVideos[0]
    const shareUrl = video.file_url || window.location.href
    try {
      await navigator.clipboard.writeText(shareUrl)
      message.success("视频链接已复制到剪贴板")
    } catch {
      message.info(`视频链接: ${shareUrl}`)
    }
  }, [generatedVideos])

  return {
    generating,
    progress,
    generated,
    generateError,
    generatedVideos,
    generate,
    retry,
    dismissError,
    download,
    share,
    getGenerationPhase,
  }
}

export default useGenerateVideo