/**
 * API Server
 * HTTP REST API compatible with Mailgun
 */

import * as plugins from '../plugins.ts';

export interface IApiServerOptions {
  port: number;
  apiKeys: string[];
}

export class ApiServer {
  private server: Deno.HttpServer | null = null;

  constructor(private options: IApiServerOptions) {}

  /**
   * Start the API server
   */
  async start(): Promise<void> {
    console.log(`[ApiServer] Starting on port ${this.options.port}...`);

    this.server = Deno.serve({ port: this.options.port }, (req) => {
      return this.handleRequest(req);
    });
  }

  /**
   * Stop the API server
   */
  async stop(): Promise<void> {
    console.log('[ApiServer] Stopping...');
    if (this.server) {
      await this.server.shutdown();
      this.server = null;
    }
  }

  /**
   * Handle incoming HTTP request
   */
  private async handleRequest(req: Request): Promise<Response> {
    const url = new URL(req.url);

    // Basic routing
    if (url.pathname === '/v1/messages' && req.method === 'POST') {
      return this.handleSendEmail(req);
    }

    if (url.pathname === '/v1/domains' && req.method === 'GET') {
      return this.handleListDomains(req);
    }

    return new Response('Not Found', { status: 404 });
  }

  private async handleSendEmail(req: Request): Promise<Response> {
    // TODO: Implement email sending
    return new Response(JSON.stringify({ message: 'Email queued' }), {
      status: 200,
      headers: { 'Content-Type': 'application/json' },
    });
  }

  private async handleListDomains(req: Request): Promise<Response> {
    // TODO: Implement domain listing
    return new Response(JSON.stringify({ domains: [] }), {
      status: 200,
      headers: { 'Content-Type': 'application/json' },
    });
  }
}