#!/usr/bin/env node
/**
 * 铸渊之眼 · 视频帧分析引擎
 * D136+ · ICE-GL-ZY001
 * 
 * 用途: 视频生成后 → 自动拆帧 → 铸渊逐帧分析 → 对比导演编码 → 输出差异报告
 * 不是"AI做不到所以不行"——是"铸渊能看·能比·能定位·能修复"
 */

const { execSync } = require('child_process');
const fs = require('fs');
const path = require('path');

function usage() {
  console.log('铸渊之眼 · 视频帧分析引擎');
  console.log('用法: node zhuyuan-eye.js <video> [director-encoding.json]');
  console.log('');
  console.log('功能:');
  console.log('  1. 拆帧(每秒1帧)');
  console.log('  2. 输出帧路径列表(供铸渊读取分析)');
  console.log('  3. 如果提供导演编码→自动对比关键帧');
  process.exit(1);
}

function main() {
  const video = process.argv[2];
  const encoding = process.argv[3];

  if (!video || !fs.existsSync(video)) {
    console.error('视频文件不存在:', video);
    usage();
  }

  const videoName = path.basename(video, path.extname(video));
  const frameDir = path.resolve(path.dirname(video), '..', 'frames', videoName);
  fs.mkdirSync(frameDir, { recursive: true });

  // 1. 拆帧
  console.log('[铸渊之眼] 拆帧:', video);
  const cmd = `ffmpeg -i "${video}" -vf "fps=1" -q:v 2 "${frameDir}/%03d.jpg" -y 2>&1`;
  const result = execSync(cmd, { encoding: 'utf8' });

  // 2. 获取帧信息
  const frames = fs.readdirSync(frameDir)
    .filter(f => f.endsWith('.jpg'))
    .sort()
    .map(f => path.join(frameDir, f));

  const probe = execSync(`ffprobe -v quiet -print_format json -show_format -show_streams "${video}"`, { encoding: 'utf8' });
  const meta = JSON.parse(probe);
  const duration = parseFloat(meta.format.duration);
  const fps = frames.length / duration;

  console.log(`  总时长: ${duration.toFixed(1)}s`);
  console.log(`  总帧数: ${frames.length} (${fps.toFixed(1)}fps 提取)`);
  console.log(`  输出目录: ${frameDir}`);
  console.log('');

  // 3. 读取导演编码进行对比
  if (encoding && fs.existsSync(encoding)) {
    const dir = JSON.parse(fs.readFileSync(encoding, 'utf8'));
    console.log('[铸渊之眼] 导演编码对比:');
    console.log(`  项目: ${dir.project} · ep${dir.episode}`);
    console.log(`  镜头: ${dir.shots.length}镜`);
    console.log('');

    // 按时间分配帧
    let frameIdx = 0;
    for (const shot of dir.shots) {
      const shotStart = frameIdx;
      const shotEnd = Math.min(frameIdx + (shot.duration || 5), frames.length);

      console.log(`  ═══ ${shot.id} · ${shot.framing} · 帧${shotStart+1}-${shotEnd} ═══`);
      console.log(`  预期: ${shot.show}`);
      console.log(`  空间: ${shot.spatial_anchor}`);
      console.log(`  文字: ${shot.text_elements}`);
      console.log(`  道具: ${shot.prop_state}`);
      console.log(`  人物: ${shot.char_ref || shot.char || 'ENV-ONLY'}`);

      // 关键帧路径(中间帧)
      if (shotEnd > shotStart) {
        const keyFrame = Math.floor((shotStart + shotEnd) / 2);
        if (keyFrame < frames.length) {
          console.log(`  关键帧: ${frames[keyFrame]}`);
        }
      }
      console.log('');
      frameIdx = shotEnd;
    }

    // 连续性检查
    if (dir.continuity_locks) {
      console.log('  ═══ 连续性锁定检查 ═══');
      const locks = dir.continuity_locks;
      if (locks.props) {
        for (const [key, lock] of Object.entries(locks.props)) {
          console.log(`  PROP: ${key} → ${lock.orientation} · ${lock.text} · 出现于${lock.appears_in.join(',')}`);
        }
      }
      if (locks.characters) {
        for (const [key, lock] of Object.entries(locks.characters)) {
          console.log(`  CHAR: ${key} → 出现于${lock.appears_in.join(',')}`);
        }
      }
    }
  }

  console.log('');
  console.log('[铸渊之眼] 分析完成。铸渊现在可以逐帧读取对比。');
  console.log(`  帧目录: ${frameDir}`);
  console.log(`  铸渊读取: node -e "require('./zhuyuan-eye').analyze('${frameDir}')"`);
}

main();