const normalizeText = (value: unknown) => String(value || "").trim();

function normalizeStoryShot(value: unknown, index: number) {
  const text = normalizeText(value);
  if (/^\d+$/.test(text)) return text.padStart(2, "0");
  return text || String(index + 1).padStart(2, "0");
}

type NormalizedStoryScriptRow = {
  shot: string;
  duration: string;
  scene: string;
  sceneDescription: string;
  shotSize: string;
  lighting: string;
  dialogue: string;
  backgroundMusic: string;
  voiceAndSfx: string;
  cameraMovement: string;
  imagePrompt: string;
  motionPrompt: string;
  keyframeUrl: string;
};

export function normalizeStoryScriptRows(value: unknown): NormalizedStoryScriptRow[] {
  if (!Array.isArray(value)) return [];
  return value
    .map((item, index) => {
      if (Array.isArray(item)) {
        const cells = item.map((cell) => normalizeText(cell));
        if (!cells.some(Boolean)) return null;
        const shot = normalizeStoryShot(cells[0], index);
        const secondCellLooksLikeDuration = /^\d+(\.\d+)?\s*(s|秒)?$/i.test(cells[1] || "");
        if (!(secondCellLooksLikeDuration ? cells.slice(2) : cells.slice(1)).some(Boolean)) return null;
        const duration = secondCellLooksLikeDuration ? cells[1] : "5s";
        const scene = secondCellLooksLikeDuration ? cells[2] || `镜头 ${shot}` : cells[1] || `镜头 ${shot}`;
        const sceneDescription = secondCellLooksLikeDuration ? cells[2] || scene : cells[2] || cells[3] || scene;
        return {
          shot,
          duration,
          scene,
          sceneDescription,
          shotSize: (secondCellLooksLikeDuration ? cells[3] : "") || "中景",
          lighting: (secondCellLooksLikeDuration ? cells[4] : cells[4]) || "电影感光影",
          dialogue: (secondCellLooksLikeDuration ? cells[5] : "") || "+",
          backgroundMusic: "无",
          voiceAndSfx: (secondCellLooksLikeDuration ? cells[6] : cells[3]) || "无",
          cameraMovement: (secondCellLooksLikeDuration ? cells[7] : "") || "缓慢推镜头",
          imagePrompt: (secondCellLooksLikeDuration ? cells[8] : cells[5]) || sceneDescription,
          motionPrompt:
            (secondCellLooksLikeDuration ? cells[9] || cells[7] : cells[6]) ||
            "保持镜头运动自然、连贯，围绕主体动作推进。",
          keyframeUrl: "",
        };
      }

      const raw =
        item && typeof item === "object" && !Array.isArray(item)
          ? (item as Record<string, unknown>)
          : {};
      const shot = normalizeStoryShot(raw.shot || raw.shotNumber || raw.index || raw.id, index);
      const duration = normalizeText(raw.duration || raw.length || raw.time || raw.seconds);
      const scene = normalizeText(raw.scene || raw.location || raw.title);
      const sceneDescription = normalizeText(
        raw.sceneDescription ||
          raw.description ||
          raw.visual ||
          raw.picture ||
          raw.screen ||
          raw.summary,
      );
      const shotSize = normalizeText(
        raw.shotSize || raw.frameSize || raw.shot_type || raw.sceneScale || raw.cameraShot,
      );
      const lighting = normalizeText(
        raw.lighting || raw.light || raw.atmosphere || raw.mood || raw.lightMood,
      );
      const dialogue = normalizeText(
        raw.dialogue || raw.dialog || raw.narration || raw.voiceover || raw.monologue || raw.line,
      );
      const cameraMovement = normalizeText(
        raw.cameraMovement || raw.cameraMove || raw.movement || raw.lensMovement || raw.motion,
      );
      const imagePrompt = normalizeText(
        raw.imagePrompt ||
          raw.image_generation_prompt ||
          raw.image ||
          raw.keyframePrompt ||
          raw.keyFramePrompt,
      );
      const motionPrompt = normalizeText(
        raw.motionPrompt ||
          raw.videoPrompt ||
          raw.video_motion_prompt ||
          raw.motion ||
          raw.cameraMovement,
      );
      const backgroundMusic = normalizeText(
        raw.backgroundMusic || raw.music || raw.bgm || raw.soundtrack,
      );
      const voiceAndSfx = normalizeText(
        raw.voiceAndSfx || raw.voice || raw.sound || raw.audio || raw.sfx,
      );

      if (
        !scene &&
        !sceneDescription &&
        !imagePrompt &&
        !motionPrompt &&
        !backgroundMusic &&
        !voiceAndSfx
      ) {
        return null;
      }

      return {
        shot,
        duration: duration || "5s",
        scene,
        sceneDescription: sceneDescription || imagePrompt || scene || `镜头 ${shot}`,
        shotSize: shotSize || "中景",
        lighting: lighting || "电影感光影",
        dialogue: dialogue || "+",
        backgroundMusic: backgroundMusic || "无",
        voiceAndSfx: voiceAndSfx || "无",
        cameraMovement: cameraMovement || "缓慢推镜头",
        imagePrompt: imagePrompt || sceneDescription || scene || `镜头 ${shot}关键帧`,
        motionPrompt: motionPrompt || cameraMovement || "保持镜头运动自然、连贯，围绕主体动作推进。",
        keyframeUrl: "",
      };
    })
    .filter(
      (
        item,
      ): item is NormalizedStoryScriptRow => Boolean(item),
    )
    .slice(0, 18);
}