import * as fs from 'fs';
import * as http from 'http';
import * as path from 'path';
import { createLogger } from '../../logger';

const logger = createLogger('main:texthooker');

export class Texthooker {
  private server: http.Server | null = null;

  public isRunning(): boolean {
    return this.server !== null;
  }

  public start(port: number): http.Server | null {
    const texthookerPath = this.getTexthookerPath();
    if (!texthookerPath) {
      logger.error('texthooker-ui not found');
      return null;
    }

    this.server = http.createServer((req, res) => {
      const urlPath = (req.url || '/').split('?')[0] ?? '/';
      const filePath = path.join(texthookerPath, urlPath === '/' ? 'index.html' : urlPath);

      const ext = path.extname(filePath);
      const mimeTypes: Record<string, string> = {
        '.html': 'text/html',
        '.js': 'application/javascript',
        '.css': 'text/css',
        '.json': 'application/json',
        '.png': 'image/png',
        '.svg': 'image/svg+xml',
        '.ttf': 'font/ttf',
        '.woff': 'font/woff',
        '.woff2': 'font/woff2',
      };

      fs.readFile(filePath, (err, data) => {
        if (err) {
          res.writeHead(404);
          res.end('Not found');
          return;
        }
        res.writeHead(200, { 'Content-Type': mimeTypes[ext] || 'text/plain' });
        res.end(data);
      });
    });

    this.server.listen(port, '127.0.0.1', () => {
      logger.info(`Texthooker server running at http://127.0.0.1:${port}`);
    });

    return this.server;
  }

  public stop(): void {
    if (this.server) {
      this.server.close();
      this.server = null;
    }
  }

  private getTexthookerPath(): string | null {
    const searchPaths = [
      path.join(__dirname, '..', '..', '..', 'vendor', 'texthooker-ui', 'docs'),
      path.join(process.resourcesPath, 'app', 'vendor', 'texthooker-ui', 'docs'),
    ];
    for (const candidate of searchPaths) {
      if (fs.existsSync(path.join(candidate, 'index.html'))) {
        return candidate;
      }
    }
    return null;
  }
}