import path from 'path';
import fs from 'fs';
import { fileURLToPath } from 'url';
import os from 'os';
import { execSync } from 'child_process';

const __filename = fileURLToPath(import.meta.url);
const __dirname = path.dirname(__filename);

export const PROJECT_ROOT = path.resolve(__dirname, '..', '..', '..', '..');
export const PIPELINE_SCRIPT = path.join(PROJECT_ROOT, '.claude', 'skills', 'video-from-script', 'scripts', 'pipeline.js');
export const ACCOUNTS_DIR = path.join(PROJECT_ROOT, 'accounts');
export const OUTPUT_DIR = path.join(PROJECT_ROOT, 'output');

export function loadJSON(filePath: string): unknown {
  return JSON.parse(fs.readFileSync(filePath, 'utf-8'));
}

export function manifestRelToUrl(manifestPath: string, relPath: string): string {
  if (!relPath) return '';
  if (relPath.startsWith('http://') || relPath.startsWith('https://')) return relPath;
  const manifestDir = path.dirname(path.resolve(manifestPath));
  const absPath = path.resolve(manifestDir, relPath);
  const relToRoot = path.relative(PROJECT_ROOT, absPath).replace(/\\/g, '/');
  return `/api/assets/file?path=${encodeURIComponent(relToRoot)}`;
}

export function runInit(params: {
  account: string;
  mode: string;
  items: unknown[];
  imageModel?: string;
  videoModel?: string;
  format?: string;
}): string {
  const tmpFile = path.join(os.tmpdir(), `pipeline-items-${Date.now()}.json`);
  fs.writeFileSync(tmpFile, JSON.stringify(params.items), 'utf-8');
  try {
    const args = [
      `"${PIPELINE_SCRIPT}"`, 'init',
      `--account "${params.account}"`,
      `--mode ${params.mode}`,
      `--items-file "${tmpFile}"`,
      params.imageModel ? `--image-model ${params.imageModel}` : '',
      params.videoModel ? `--video-model ${params.videoModel}` : '',
      params.format ? `--format ${params.format}` : '',
    ].filter(Boolean).join(' ');
    const output = execSync(`node ${args}`, { cwd: PROJECT_ROOT, encoding: 'utf-8' });
    const match = output.match(/Manifest 已创建: (.+)/);
    if (!match) throw new Error(`Failed to parse manifest path from init output: ${output}`);
    return match[1].trim();
  } finally {
    try { fs.unlinkSync(tmpFile); } catch { /* ignore */ }
  }
}