/**
 * D136+ · 可灵视频生成 · 三层协议提示词 → Kling API
 * 
 * 与 Seedance 版 generate-shots.js 共享同一套 buildPrompt() 逻辑。
 * 唯一区别: API 适配器不同（kling-api-adapter vs video-api-adapter）。
 * 
 * 用法: node generate-kling-shots.js
 * 
 * ⊢ 三层协议 (cc-022):
 *   上下文层: 英文编码 → 告诉AI前面发生了什么
 *   编码层:   CHAR+PROP+ENV锁定 → 不可变信息
 *   场景层:   中文自然语言 → AI理解为什么后自己推理
 * 
 * 铸渊 ICE-GL-ZY001 · D136+ · 2026-06-21
 */
const { generateVideo } = require('./kling-official-adapter');
const fs = require('fs');
const path = require('path');

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

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'));

  console.log(`[Kling Generate] ${encoding.project} · ep${encoding.episode} · ${encoding.shots.length}镜`);
  console.log(`[Kling Generate] 模型: kling-v2-6 · 约1.8元/镜`);
  console.log(`[Kling Generate] 输出: ${OUT_DIR}\n`);

  fs.mkdirSync(OUT_DIR, { recursive: true });

  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 || '(无)'}`);

    const shotName = `${encoding.project}-${encoding.episode}-${s.id}`;
    const outputPath = path.join(OUT_DIR, `kling-${shotName}.mp4`);

    // 已存在则跳过
    if (fs.existsSync(outputPath)) {
      console.log(`  ✅ Kling版已存在: ${path.basename(outputPath)}，跳过\n`);
      results.push({ shot: s.id, file: outputPath, api: 'kling', status: 'cached' });
      continue;
    }

    console.log(`  [Prompt 预览]: ${prompt.substring(0, 120)}...`);

    try {
      const result = await generateVideo({
        prompt,
        duration: s.duration || 5,
        outputPath,
        model: 'kling-v2-6',
      });
      console.log(`  ✅ Kling生成完成: ${path.basename(result.videoPath)} (task: ${result.taskId})\n`);
      results.push({
        shot: s.id,
        file: result.videoPath,
        taskId: result.taskId,
        api: 'kling',
        model: 'kling-v2-6',
        status: 'completed',
        generatedAt: new Date().toISOString(),
      });
    } catch (e) {
      console.error(`  ❌ Kling生成失败: ${e.message}\n`);
      results.push({ shot: s.id, file: null, api: 'kling', status: 'failed', error: e.message });
    }
  }

  // 写入结果
  const resultFile = path.join(OUT_DIR, `kling-${encoding.project}-${encoding.episode}-results.json`);
  fs.writeFileSync(resultFile, JSON.stringify(results, null, 2));

  // 更新video-registry
  updateRegistry(results, encoding);

  const success = results.filter(r => r.status === 'completed').length;
  console.log(`\n═══ Kling完成: ${success}/${results.length} ═══`);
  console.log(`结果: ${resultFile}`);

  if (success < results.length) {
    console.log(`⚠️ ${results.length - success}镜失败，详见结果文件。`);
  }
}

/**
 * 三层协议 buildPrompt — 和 Seedance 版 generate-shots.js 完全一致的逻辑
 * ⊢ cc-022: 上下文层(英) + 编码层(中英) + 场景层(中)
 */
function buildPrompt(shot, encoding) {
  const locks = encoding.continuity_locks;
  let prompt = '';

  // ─── [Context] 上下文层: 英文编码 → 告诉AI前面发生了什么 ───
  if (encoding.episode_summary) {
    prompt += `[Ep${encoding.episode} Summary] ${encoding.episode_summary}\n`;
  }
  if (encoding.prev_shots?.[shot.id]) {
    prompt += `[Previous Shot] ${encoding.prev_shots[shot.id]}\n\n`;
  }

  // ─── ⊢ 编码层: CHAR+PROP+ENV锁定 → 不可变 ───
  if (shot.char_ref && locks?.characters?.[shot.char_ref]) {
    prompt += `⊢ CHAR-003 Su Bai: 18yr male, white robe, black hair half-up, 175cm\n`;
  }
  if (shot.prop_ref && locks?.props?.[shot.prop_ref]) {
    prompt += `⊢ PROP: vertical hanging wood sign, worn edges, 【天道宗】\n`;
  }
  if (shot.prop_ref_2 && locks?.props?.[shot.prop_ref_2]) {
    prompt += `⊢ PROP: horizontal floor board, recruitment ad\n`;
  }
  if (shot.env && locks?.environments?.[shot.env]) {
    prompt += `⊢ ENV: cultivation square, edge corner, golden sunlight\n`;
  }

  // ─── ⊢ 场景层: 中文自然语言 → AI理解为什么后自己推理 ───
  if (encoding.scene) {
    prompt += `\n⊢ Scene:\n  ${encoding.scene}\n`;
  }

  // ─── → 动作: 当前镜头的 spatial_anchor + 动作描述 ───
  prompt += `\n→ Shot: ${shot.framing}`;
  if (shot.emotion?.type) prompt += ` | ${shot.emotion.type}`;
  prompt += `\n`;
  if (shot.action) {
    prompt += `→ ${shot.action}\n`;
  }

  // ─── 风格约束 ───
  prompt += `⊢ Style: 3D animation, Chinese cultivation, cinematic lighting\n`;
  prompt += `⊢ No: photorealism, cartoon, modern elements, watermark`;

  return prompt;
}

/**
 * 更新 video-registry.json 加入可灵生成的视频
 */
function updateRegistry(results, encoding) {
  let registry = { _meta: { updated: new Date().toISOString(), by: '铸渊 ICE-GL-ZY001' }, shots: {} };

  if (fs.existsSync(REGISTRY_FILE)) {
    try { registry = JSON.parse(fs.readFileSync(REGISTRY_FILE, 'utf8')); }
    catch (e) { console.log('  ⚠️ video-registry.json 读取失败，新建。'); }
  }

  for (const r of results) {
    if (r.status !== 'completed') continue;
    const shotId = `kling-${encoding.project}-${encoding.episode}-${r.shot}`;
    registry.shots[shotId] = {
      shotId,
      taskId: r.taskId || null,
      projectKey: `${encoding.project}/${encoding.episode}`,
      filePath: r.file,
      duration: 5,
      model: 'kling-v2-6',
      api: 'kling',
      generatedAt: r.generatedAt || new Date().toISOString(),
      dNumber: 'D136+',
    };
  }

  registry._meta.updated = new Date().toISOString();
  fs.writeFileSync(REGISTRY_FILE, JSON.stringify(registry, null, 2));
  console.log(`\n[Registry] video-registry.json 已更新 (Kling条目: ${Object.keys(registry.shots).filter(k => k.startsWith('kling-')).length})`);
}

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