"use client"

import { useCallback, useEffect, useMemo, useState } from "react"
import {
  ArrowLeft,
  Clapperboard,
  Copy,
  FileText,
  Image as ImageIcon,
  Loader2,
  Play,
  RefreshCw,
  Sparkles,
  Wand2,
} from "lucide-react"
import { Toaster, toast } from "sonner"
import { MediaAssetTile } from "@/components/media-asset-tile"
import {
  apiAssetUrl,
  deleteGeneratedImage,
  deleteGeneratedVideo,
  generateCreativeCopy,
  generateImage,
  generateStoryboardVideo,
  getJob,
  listJobs,
  type CreativeCopyVariant,
  type GeneratedImage,
  type GeneratedVideo,
  type Job,
  type JobSummary,
} from "@/lib/api"

type ImageItem = GeneratedImage & { frameIdx: number }
type BusyTask = "image" | "video" | "copy" | "load" | null

function cx(...items: Array<string | false | null | undefined>) {
  return items.filter(Boolean).join(" ")
}

function jobTitle(item: Job | JobSummary | null) {
  if (!item) return "未选择任务"
  const raw = item.url.replace(/^creative:\/\//, "").replace(/^upload:\/\//, "")
  return raw || item.id
}

function sourceFrameSrc(job: Job | null) {
  return job?.frames?.[0]?.url ? apiAssetUrl(job.frames[0].url) : ""
}

function videoSrc(job: Job, video: GeneratedVideo) {
  return apiAssetUrl(video.url || `/jobs/${job.id}/storyboard-videos/${video.id}.mp4`)
}

function imageItems(job: Job | null): ImageItem[] {
  if (!job) return []
  return job.frames
    .flatMap((frame) => (frame.generated_images ?? []).map((image) => ({ ...image, frameIdx: frame.index })))
    .sort((a, b) => b.created_at - a.created_at)
}

function createdLabel(ts?: number) {
  if (!ts) return ""
  return new Date(ts * 1000).toLocaleString("zh-CN", { month: "2-digit", day: "2-digit", hour: "2-digit", minute: "2-digit" })
}

export default function DetailPage() {
  const [jobId, setJobId] = useState("")
  const [job, setJob] = useState<Job | null>(null)
  const [recentJobs, setRecentJobs] = useState<JobSummary[]>([])
  const [prompt, setPrompt] = useState("")
  const [product, setProduct] = useState("SKG 颈部按摩仪")
  const [audience, setAudience] = useState("久坐办公、低头刷手机的人群")
  const [tone, setTone] = useState("真实、直接、有购买理由")
  const [seconds, setSeconds] = useState(12)
  const [copyVariants, setCopyVariants] = useState<CreativeCopyVariant[]>([])
  const [busy, setBusy] = useState<BusyTask>(null)
  const [error, setError] = useState("")

  const images = useMemo(() => imageItems(job), [job])
  const videos = useMemo(() => job?.generated_videos ?? [], [job])
  const runningVideo = videos.some((item) => item.status === "queued" || item.status === "in_progress")

  const loadJob = useCallback(async (id: string) => {
    if (!id) return
    setBusy("load")
    setError("")
    try {
      const loaded = await getJob(id)
      setJob(loaded)
      setJobId(id)
      window.history.replaceState(null, "", `/detail/?job=${id}`)
    } catch (e) {
      const message = e instanceof Error ? e.message : "读取任务失败"
      setError(message)
      toast.error(message)
    } finally {
      setBusy(null)
    }
  }, [])

  const refreshJobs = useCallback(async () => {
    try {
      setRecentJobs(await listJobs(20))
    } catch {
      setRecentJobs([])
    }
  }, [])

  useEffect(() => {
    const id = new URLSearchParams(window.location.search).get("job") || ""
    setJobId(id)
    refreshJobs()
    if (id) loadJob(id)
  }, [loadJob, refreshJobs])

  useEffect(() => {
    if (!job || !runningVideo) return
    let failures = 0
    const timer = window.setInterval(async () => {
      try {
        setJob(await getJob(job.id))
        failures = 0
      } catch {
        // one transient 5xx / network blip must not freeze progress forever;
        // only give up after sustained failures
        failures += 1
        if (failures >= 10) window.clearInterval(timer)
      }
    }, 2600)
    return () => window.clearInterval(timer)
  }, [job, runningVideo])

  const requireJobAndPrompt = () => {
    if (!job) {
      toast.error("先选择任务")
      return false
    }
    if (!prompt.trim()) {
      toast.error("先写生成要求")
      return false
    }
    return true
  }

  const runImage = async () => {
    if (!requireJobAndPrompt() || !job) return
    setBusy("image")
    setError("")
    try {
      setJob(await generateImage(job.id, 0, {
        prompt: `${prompt.trim()}\n\nProduct: ${product}. Audience: ${audience}. Tone: ${tone}.`,
        mode: sourceFrameSrc(job) ? "edit" : "text",
      }))
      toast.success("图片已生成")
    } catch (e) {
      const message = e instanceof Error ? e.message : "生图失败"
      setError(message)
      toast.error(message)
    } finally {
      setBusy(null)
    }
  }

  const runVideo = async () => {
    if (!requireJobAndPrompt() || !job) return
    setBusy("video")
    setError("")
    try {
      setJob(await generateStoryboardVideo(job.id, 0, {
        prompt: `${prompt.trim()}\n\nProduct: ${product}. Audience: ${audience}. Tone: ${tone}. Keep the SKG product shape stable and visible.`,
        duration: seconds,
        count: 1,
        first_image: { kind: "keyframe", frame_idx: 0 },
        size: "720x1280",
      }))
      toast.success("视频已提交")
    } catch (e) {
      const message = e instanceof Error ? e.message : "生视频失败"
      setError(message)
      toast.error(message)
    } finally {
      setBusy(null)
    }
  }

  const runCopy = async () => {
    const goal = prompt.trim() || `${product} ${audience}`
    setBusy("copy")
    setError("")
    try {
      const result = await generateCreativeCopy({ goal, product, audience, tone, seconds })
      setCopyVariants(result.variants)
      toast.success("图文方案已生成")
    } catch (e) {
      const message = e instanceof Error ? e.message : "写文案失败"
      setError(message)
      toast.error(message)
    } finally {
      setBusy(null)
    }
  }

  const deleteImage = async (image: ImageItem) => {
    if (!job) return
    try {
      setJob(await deleteGeneratedImage(job.id, image.frameIdx, image.id))
      toast.success("图片已删除")
    } catch (e) {
      toast.error(e instanceof Error ? e.message : "删除失败")
    }
  }

  const deleteVideo = async (video: GeneratedVideo) => {
    if (!job) return
    try {
      setJob(await deleteGeneratedVideo(job.id, video.id))
      toast.success("视频已删除")
    } catch (e) {
      toast.error(e instanceof Error ? e.message : "删除失败")
    }
  }

  const copyText = async (text: string) => {
    try {
      await navigator.clipboard.writeText(text)
      toast.success("已复制")
    } catch {
      toast.error("复制失败")
    }
  }

  return (
    <main className="min-h-screen bg-[#eef2ec] text-[#17201d]">
      <Toaster richColors position="top-center" />
      <div className="mx-auto grid min-h-screen w-full max-w-[1760px] grid-rows-[auto_minmax(0,1fr)] px-4 py-4 sm:px-6">
        <header className="flex flex-wrap items-center justify-between gap-3 border-b border-[#d8dfd4] pb-4">
          <div className="flex items-center gap-3">
            <a
              href="/"
              className="inline-flex h-10 w-10 items-center justify-center rounded-md border border-[#cbd6d0] bg-white text-[#35443f] transition hover:border-[#0f766e]/60"
              aria-label="返回工作台"
              title="返回工作台"
            >
              <ArrowLeft className="h-5 w-5" />
            </a>
            <div>
              <h1 className="text-xl font-semibold tracking-normal">任务详情</h1>
              <p className="mt-1 max-w-[620px] truncate text-sm text-[#66746e]">{jobTitle(job)}</p>
            </div>
          </div>
          <button
            type="button"
            onClick={() => jobId && loadJob(jobId)}
            disabled={!jobId || !!busy}
            className="inline-flex h-9 items-center gap-2 rounded-md border border-[#cbd6d0] bg-white px-3 text-sm font-semibold text-[#35443f] transition hover:border-[#0f766e]/60 disabled:cursor-not-allowed disabled:opacity-60"
          >
            {busy === "load" ? <Loader2 className="h-4 w-4 animate-spin" /> : <RefreshCw className="h-4 w-4" />}
            刷新
          </button>
        </header>

        <section className="grid min-h-0 gap-4 py-4 xl:grid-cols-[300px_minmax(0,1fr)_420px]">
          <aside className="grid min-h-0 grid-rows-[auto_minmax(0,1fr)] gap-3">
            <section className="rounded-lg border border-[#d8dfd4] bg-white p-3">
              <h2 className="text-sm font-semibold">任务信息</h2>
              <div className="mt-3 grid gap-2 text-sm">
                <div className="flex justify-between gap-3 rounded-md border border-[#d8dfd4] bg-[#f7f9f5] px-3 py-2">
                  <span className="text-[#66746e]">ID</span>
                  <span className="font-mono text-xs">{job?.id || jobId || "-"}</span>
                </div>
                <div className="flex justify-between gap-3 rounded-md border border-[#d8dfd4] bg-[#f7f9f5] px-3 py-2">
                  <span className="text-[#66746e]">图片</span>
                  <span>{images.length}</span>
                </div>
                <div className="flex justify-between gap-3 rounded-md border border-[#d8dfd4] bg-[#f7f9f5] px-3 py-2">
                  <span className="text-[#66746e]">视频</span>
                  <span>{videos.length}</span>
                </div>
              </div>
              {sourceFrameSrc(job) ? (
                <div className="mt-3">
                  <MediaAssetTile
                    src={sourceFrameSrc(job)}
                    alt="reference"
                    objectFit="contain"
                    previewObjectFit="contain"
                    className="aspect-[4/5] w-full rounded-md"
                    label="参考图"
                    meta={job?.frames?.[0]?.index ?? 0}
                  />
                </div>
              ) : null}
            </section>

            <section className="min-h-0 rounded-lg border border-[#d8dfd4] bg-white p-3">
              <div className="mb-2 flex items-center justify-between">
                <h2 className="text-sm font-semibold">我的任务</h2>
                <button
                  type="button"
                  onClick={refreshJobs}
                  className="rounded p-1 text-[#66746e] hover:bg-[#f0f3ee] hover:text-[#17201d]"
                  aria-label="刷新任务列表"
                  title="刷新任务列表"
                >
                  <RefreshCw className="h-4 w-4" />
                </button>
              </div>
              <div className="grid max-h-[540px] gap-2 overflow-y-auto pr-1">
                {recentJobs.map((item) => (
                  <button
                    key={item.id}
                    type="button"
                    onClick={() => loadJob(item.id)}
                    className={cx(
                      "grid grid-cols-[48px_minmax(0,1fr)] gap-2 rounded-md border bg-[#f7f9f5] p-1.5 text-left transition hover:border-[#0f766e]/60",
                      job?.id === item.id ? "border-[#0f766e] ring-2 ring-[#0f766e]/10" : "border-[#d8dfd4]",
                    )}
                  >
                    <MediaAssetTile
                      src={apiAssetUrl(item.thumbnail)}
                      alt=""
                      objectFit="cover"
                      className="aspect-square rounded"
                      disablePreview={!item.thumbnail}
                    />
                    <span className="min-w-0">
                      <span className="block truncate text-xs font-semibold">{jobTitle(item)}</span>
                      <span className="block text-[11px] text-[#66746e]">{item.frame_count} 图源 · {item.video_count} 视频</span>
                    </span>
                  </button>
                ))}
                {!recentJobs.length ? (
                  <div className="rounded-md border border-dashed border-[#cbd6d0] bg-[#f7f9f5] px-3 py-5 text-center text-xs text-[#66746e]">暂无任务</div>
                ) : null}
              </div>
            </section>
          </aside>

          <section className="min-h-0 overflow-y-auto rounded-lg border border-[#d8dfd4] bg-white p-4">
            {job ? (
              <div className="grid gap-6">
                <section className="grid gap-3">
                  <div className="flex items-center gap-2">
                    <ImageIcon className="h-4 w-4 text-[#0f766e]" />
                    <h2 className="text-base font-semibold">生成图片</h2>
                  </div>
                  {images.length ? (
                    <div className="grid gap-3 sm:grid-cols-2 lg:grid-cols-3">
                      {images.map((image) => (
                        <div key={image.id} className="grid gap-1.5">
                          <MediaAssetTile
                            src={apiAssetUrl(image.url)}
                            alt="generated image"
                            objectFit="contain"
                            previewObjectFit="contain"
                            className="aspect-[4/5] w-full rounded-md"
                            label={image.model}
                            meta={image.mode}
                            onDelete={() => deleteImage(image)}
                          />
                          <div className="truncate text-[11px] text-[#66746e]">{createdLabel(image.created_at)}</div>
                        </div>
                      ))}
                    </div>
                  ) : (
                    <div className="rounded-md border border-dashed border-[#cbd6d0] bg-[#f7f9f5] px-4 py-8 text-center text-sm text-[#66746e]">暂无图片结果</div>
                  )}
                </section>

                <section className="grid gap-3">
                  <div className="flex items-center gap-2">
                    <Clapperboard className="h-4 w-4 text-[#ea5b2d]" />
                    <h2 className="text-base font-semibold">生成视频</h2>
                  </div>
                  {videos.length ? (
                    <div className="grid gap-3 sm:grid-cols-2">
                      {videos.map((video) => (
                        <div key={video.id} className="grid gap-1.5 rounded-md border border-[#d8dfd4] bg-[#f7f9f5] p-2">
                          <MediaAssetTile
                            kind="video"
                            src={video.status === "completed" ? videoSrc(job, video) : undefined}
                            poster={apiAssetUrl(video.poster_url)}
                            objectFit="cover"
                            previewObjectFit="contain"
                            className="aspect-video w-full rounded-md"
                            label={video.model}
                            meta={`${video.status} · ${Math.round(video.progress)}%`}
                            busy={video.status === "queued" || video.status === "in_progress"}
                            onDelete={() => deleteVideo(video)}
                          />
                          <div className="h-1 overflow-hidden rounded-full bg-[#e4ebe6]">
                            <div className="h-full rounded-full bg-[#ea5b2d]" style={{ width: `${Math.max(4, video.progress)}%` }} />
                          </div>
                          {video.error ? <div className="text-xs text-rose-700">{video.error}</div> : null}
                        </div>
                      ))}
                    </div>
                  ) : (
                    <div className="rounded-md border border-dashed border-[#cbd6d0] bg-[#f7f9f5] px-4 py-8 text-center text-sm text-[#66746e]">暂无视频结果</div>
                  )}
                </section>

                <section className="grid gap-3">
                  <div className="flex items-center gap-2">
                    <FileText className="h-4 w-4 text-[#2563eb]" />
                    <h2 className="text-base font-semibold">营销图文</h2>
                  </div>
                  {copyVariants.length ? (
                    <div className="grid gap-3 lg:grid-cols-3">
                      {copyVariants.map((variant, index) => (
                        <article key={`${variant.title}-${index}`} className="rounded-md border border-[#d8dfd4] bg-[#f7f9f5] p-3">
                          <div className="mb-2 flex items-start justify-between gap-2">
                            <h3 className="text-sm font-semibold">{variant.title || `方案 ${index + 1}`}</h3>
                            <button
                              type="button"
                              onClick={() => copyText([variant.hook_zh, variant.script_zh, variant.caption_zh].filter(Boolean).join("\n\n"))}
                              className="rounded p-1 text-[#66746e] hover:bg-white hover:text-[#17201d]"
                              aria-label="复制文案"
                              title="复制文案"
                            >
                              <Copy className="h-4 w-4" />
                            </button>
                          </div>
                          <p className="text-sm leading-6 text-[#243530]">{variant.hook_zh}</p>
                          <pre className="mt-2 max-h-44 overflow-y-auto whitespace-pre-wrap rounded bg-white p-2 text-xs leading-5 text-[#42524c]">{variant.script_zh}</pre>
                        </article>
                      ))}
                    </div>
                  ) : (
                    <div className="rounded-md border border-dashed border-[#cbd6d0] bg-[#f7f9f5] px-4 py-8 text-center text-sm text-[#66746e]">暂无图文方案</div>
                  )}
                </section>
              </div>
            ) : (
              <div className="flex min-h-[520px] items-center justify-center rounded-md border border-dashed border-[#cbd6d0] bg-[#f7f9f5] text-sm text-[#66746e]">
                请选择任务
              </div>
            )}
          </section>

          <aside className="grid min-h-0 grid-rows-[auto_auto_minmax(0,1fr)] gap-3">
            <section className="rounded-lg border border-[#d8dfd4] bg-white p-3">
              <h2 className="text-sm font-semibold">继续生成</h2>
              <div className="mt-3 grid gap-3">
                <label className="grid gap-1.5">
                  <span className="text-xs font-medium text-[#52635d]">产品</span>
                  <input
                    value={product}
                    onChange={(event) => setProduct(event.target.value)}
                    className="h-10 rounded-md border border-[#d8dfd4] bg-[#f7f9f5] px-3 text-sm outline-none focus:border-[#0f766e] focus:ring-2 focus:ring-[#0f766e]/15"
                  />
                </label>
                <label className="grid gap-1.5">
                  <span className="text-xs font-medium text-[#52635d]">人群</span>
                  <input
                    value={audience}
                    onChange={(event) => setAudience(event.target.value)}
                    className="h-10 rounded-md border border-[#d8dfd4] bg-[#f7f9f5] px-3 text-sm outline-none focus:border-[#0f766e] focus:ring-2 focus:ring-[#0f766e]/15"
                  />
                </label>
                <label className="grid gap-1.5">
                  <span className="text-xs font-medium text-[#52635d]">要求</span>
                  <textarea
                    value={prompt}
                    onChange={(event) => setPrompt(event.target.value)}
                    placeholder="继续生成一组更高端的营销图，或者提交一条快速视频要求。"
                    className="min-h-40 resize-none rounded-md border border-[#d8dfd4] bg-[#f7f9f5] p-3 text-sm leading-6 outline-none focus:border-[#0f766e] focus:ring-2 focus:ring-[#0f766e]/15"
                  />
                </label>
                <label className="grid gap-1.5">
                  <span className="text-xs font-medium text-[#52635d]">语气</span>
                  <input
                    value={tone}
                    onChange={(event) => setTone(event.target.value)}
                    className="h-10 rounded-md border border-[#d8dfd4] bg-[#f7f9f5] px-3 text-sm outline-none focus:border-[#0f766e] focus:ring-2 focus:ring-[#0f766e]/15"
                  />
                </label>
                <label className="grid gap-1.5">
                  <span className="text-xs font-medium text-[#52635d]">视频时长</span>
                  <select
                    value={seconds}
                    onChange={(event) => setSeconds(Number(event.target.value))}
                    className="h-10 rounded-md border border-[#d8dfd4] bg-[#f7f9f5] px-3 text-sm outline-none focus:border-[#0f766e] focus:ring-2 focus:ring-[#0f766e]/15"
                  >
                    {[8, 12, 15, 20, 30, 45].map((value) => <option key={value} value={value}>{value} 秒</option>)}
                  </select>
                </label>
                {error ? <div className="rounded-md border border-rose-200 bg-rose-50 px-3 py-2 text-sm text-rose-700">{error}</div> : null}
              </div>
            </section>

            <section className="grid gap-2 rounded-lg border border-[#d8dfd4] bg-white p-3">
              <button
                type="button"
                onClick={runImage}
                disabled={!job || !!busy}
                className="inline-flex h-10 items-center justify-center gap-2 rounded-md bg-[#0f766e] text-sm font-semibold text-white transition hover:bg-[#115e59] disabled:cursor-not-allowed disabled:opacity-60"
              >
                {busy === "image" ? <Loader2 className="h-4 w-4 animate-spin" /> : <Wand2 className="h-4 w-4" />}
                生成图片
              </button>
              <button
                type="button"
                onClick={runVideo}
                disabled={!job || !!busy}
                className="inline-flex h-10 items-center justify-center gap-2 rounded-md bg-[#ea5b2d] text-sm font-semibold text-white transition hover:bg-[#d94f25] disabled:cursor-not-allowed disabled:opacity-60"
              >
                {busy === "video" ? <Loader2 className="h-4 w-4 animate-spin" /> : <Play className="h-4 w-4" />}
                生成视频
              </button>
              <button
                type="button"
                onClick={runCopy}
                disabled={!!busy}
                className="inline-flex h-10 items-center justify-center gap-2 rounded-md border border-[#cbd6d0] bg-[#f7f9f5] text-sm font-semibold text-[#35443f] transition hover:border-[#9ba9a2] disabled:cursor-not-allowed disabled:opacity-60"
              >
                {busy === "copy" ? <Loader2 className="h-4 w-4 animate-spin" /> : <Sparkles className="h-4 w-4" />}
                生成图文方案
              </button>
            </section>

            <section className="min-h-0 rounded-lg border border-[#d8dfd4] bg-white p-3">
              <h2 className="mb-2 text-sm font-semibold">提示词</h2>
              <div className="grid max-h-[360px] gap-2 overflow-y-auto pr-1">
                {[...images.slice(0, 4).map((item) => item.prompt), ...videos.slice(0, 4).map((item) => item.prompt)]
                  .filter(Boolean)
                  .map((item, index) => (
                    <button
                      key={`${index}-${item.slice(0, 20)}`}
                      type="button"
                      onClick={() => setPrompt(item)}
                      className="rounded-md border border-[#d8dfd4] bg-[#f7f9f5] p-2 text-left text-xs leading-5 text-[#42524c] transition hover:border-[#0f766e]/60"
                    >
                      {item.slice(0, 180)}
                    </button>
                  ))}
                {!images.length && !videos.length ? (
                  <div className="rounded-md border border-dashed border-[#cbd6d0] bg-[#f7f9f5] px-3 py-5 text-center text-xs text-[#66746e]">暂无提示词</div>
                ) : null}
              </div>
            </section>
          </aside>
        </section>
      </div>
    </main>
  )
}