#!/usr/bin/env node
/**
 * image-api-bridge.js · Python ↔ Node 图片API桥接
 * D144 · 铸渊 ICE-GL-ZY001
 *
 * Python 通过 subprocess 调用本脚本，stdin 输入 JSON 命令，stdout 输出 JSON 结果。
 * 解决 char-hero-design-packer.py 依赖 JS image-api-adapter 的问题。
 *
 * 用法:
 *   echo '{"action":"generate_character_ref","charId":"CHAR-003","l0":"...","l1":"..."}' | node image-api-bridge.js
 *   echo '{"action":"generate_image","prompt":"...","size":"2048x2048","filename":"test.png"}' | node image-api-bridge.js
 */

// 桥接模式：所有日志输出到 stderr，stdout 只输出最终 JSON 结果
console.log = (...args) => process.stderr.write(args.join(' ') + '\n');
console.warn = (...args) => process.stderr.write(args.join(' ') + '\n');
console.error = (...args) => process.stderr.write(args.join(' ') + '\n');

const { generateImage, generateCharacterRef } = require('./image-api-adapter');

let input = '';
process.stdin.setEncoding('utf8');
process.stdin.on('data', chunk => input += chunk);
process.stdin.on('end', async () => {
  try {
    const req = JSON.parse(input || '{}');
    let result;

    switch (req.action) {
      case 'generate_character_ref': {
        const { charId, l0, l1 } = req;
        if (!charId) throw new Error('缺少 charId');
        result = await generateCharacterRef({
          charId,
          l0Descriptor: l0 || '中国古代修仙少年，16岁，亚洲面孔',
          l1Config: l1 ? { clothing: l1 } : undefined,
        });
        break;
      }

      case 'generate_image': {
        const { prompt, size, filename, outputPath } = req;
        if (!prompt) throw new Error('缺少 prompt');
        result = await generateImage({ prompt, size, filename, outputPath });
        break;
      }

      default:
        throw new Error(`未知操作: ${req.action}`);
    }

    process.stdout.write(JSON.stringify({ ok: true, data: result }) + '\n');
    process.exit(0);
  } catch (err) {
    process.stdout.write(JSON.stringify({ ok: false, error: err.message }) + '\n');
    process.exit(1);
  }
});

// stdin 已关闭（pipe 模式），直接触发 end
if (process.stdin.isTTY) {
  process.stderr.write('用法: echo \'{"action":"..."}\' | node image-api-bridge.js\n');
  process.exit(1);
}