/**
 * D136+ · 视频批量生成 · 导演编码 → Seedance API
 * 用法: node generate-shots.js
 */
const { generateVideo } = require('./video-api-adapter');
const fs = require('fs');
const path = require('path');

const ENCODING_FILE = path.resolve(__dirname, '../outputs/付费修仙-ep01-director-encoding.json');

// D136+ 输出优先JZAO外置硬盘 · 本地fallback
const JZAO_SHOTS = '/Volumes/JZAO/铸渊-ICE-GL-ZY001/OUT-输出/视频/zai-fu-fei-xiu-xian/ep01';
const LOCAL_SHOTS = path.resolve(__dirname, '../outputs/shots');
const OUT_DIR = fs.existsSync(JZAO_SHOTS) ? JZAO_SHOTS : LOCAL_SHOTS;

async function main() {
  const encoding = JSON.parse(fs.readFileSync(ENCODING_FILE, 'utf8'));
  fs.mkdirSync(OUT_DIR, { recursive: true });

  console.log(`[Generate] ${encoding.project} · ep${encoding.episode} · ${encoding.shots.length}镜`);
  console.log(`[Generate] 输出: ${OUT_DIR}\n`);

  const results = [];
  for (let i = 0; i < encoding.shots.length; i++) {
    const s = encoding.shots[i];
    const prompt = buildPrompt(s, encoding);
    
    console.log(`━━━ 镜${i + 1}/${encoding.shots.length}: ${s.id} ━━━`);
    console.log(`  景别: ${s.framing} | 情绪: ${s.emotion?.type}(${s.emotion?.intensity}) | ${s.duration}s`);
    console.log(`  spatial_anchor: ${s.spatial_anchor}`);
    console.log(`  text_elements: ${s.text_elements}`);
    console.log(`  prompt: ${prompt.substring(0, 100)}...`);

    const outputPath = path.join(OUT_DIR, `${encoding.project}-${encoding.episode}-${s.id}.mp4`);
    if (fs.existsSync(outputPath)) {
      console.log(`  ✅ 已存在，跳过\n`);
      results.push({ ...s, file: outputPath });
      continue;
    }

    try {
      const result = await generateVideo({
        prompt,
        duration: s.duration || 5,
        shotId: `${encoding.project}-${encoding.episode}-${s.id}`,
        projectKey: `付费修仙/ep01`,
        outputPath,
      });
      console.log(`  ✅ ${path.basename(result.videoPath)}\n`);
      results.push({ ...s, file: result.videoPath, taskId: result.taskId });
    } catch (e) {
      console.error(`  ❌ ${e.message}\n`);
      results.push({ ...s, file: null, error: e.message });
      // 继续下一个
    }
  }

  const resultFile = path.join(OUT_DIR, `${encoding.project}-${encoding.episode}-results.json`);
  fs.writeFileSync(resultFile, JSON.stringify(results, null, 2));
  const success = results.filter(r => r.file).length;
  console.log(`\n═══ 完成: ${success}/${results.length} ═══`);
  console.log(`结果: ${resultFile}`);
}

function buildPrompt(shot, encoding) {
  const locks = encoding.continuity_locks;
  const parts = [];

  // === D136+ 分层提示词引擎 ===
  // 冰朔: "用编码告诉他这是什么意思" → HLDP编号不是标签，是优先级排序
  // 
  // 提示词分层:
  //   L0 主体(人物+道具) ← AI注意力第一落点·不可稀释
  //   L1 空间(克制描述)   ← 只给必要信息·不抢人物焦点
  //   L2 动作             ← 具体行为
  //   L3 风格/约束        ← 全局修饰

  let desc = '';

  // ─── L0: 主体锁定 ───
  // 人物和道具的描述放在最前面，确保AI第一注意力在这里
  const l0Parts = [];

  if (shot.char_ref && locks?.characters?.[shot.char_ref]) {
    const charLock = locks.characters[shot.char_ref];
    l0Parts.push(charLock.locked_desc);
  }

  if (shot.prop_ref && locks?.props?.[shot.prop_ref]) {
    const propLock = locks.props[shot.prop_ref];
    l0Parts.push(propLock.locked_desc);
  }
  if (shot.prop_ref_2 && locks?.props?.[shot.prop_ref_2]) {
    const propLock2 = locks.props[shot.prop_ref_2];
    l0Parts.push(propLock2.locked_desc);
  }

  // 如果没人也没道具(纯环境镜)→不生成L0
  if (l0Parts.length > 0) {
    desc += l0Parts.join('。');
  }

  // ─── L1: 空间定位 ───
  // 克制描述。不给灵霄宗鎏金大字——除非是S1-01建立镜
  if (shot.env && locks?.environments?.[shot.env]) {
    const envLock = locks.environments[shot.env];
    // 有主体时用简短版·没有主体时用完整版
    if (l0Parts.length > 0) {
      // 简短版: 去掉"灵霄宗鎏金大字"细节，只留位置和光线
      desc += `。背景: 修仙广场边缘角落，人群远处，金色阳光`;
    } else {
      desc += envLock.locked_desc;
    }
  }

  // ─── L2: 动作 ───
  if (shot.action) {
    desc += `。${shot.action}`;
  }

  // 关键信息追加
  if (shot.text_elements) desc += `。画面中可见文字: ${shot.text_elements}`;
  if (shot.prop_state) desc += `。${shot.prop_state}`;

  parts.push(desc);

  // ─── L3: 风格 ───
  parts.push('景别: ' + shot.framing);

  if (shot.emotion?.type) parts.push('氛围: ' + shot.emotion.type);

  // 风格锁定（不再是第一行）
  parts.push('真人写实风格，电影级光影，亚洲面孔');
  parts.push('不要卡通·不要3D渲染·不要现代元素·不要水印·不要字幕');

  return parts.join('。');
}

main().catch(e => { console.error(e); process.exit(1); });