/**
 * Email MCPlet
 * pool: media-pool | mcpletType: action | visibility: [app] | auth: passkey workflow
 *
 * visibility: ['app'] means this tool is NOT exposed to the LLM directly.
 * It is invoked only through the Host-controlled action-dispatch path
 * (Dispatch Agent) after Passkey authentication.
 * enforcement: 'workflow' — one Passkey ceremony per Director cycle (contextId),
 * not one per individual email send.
 */
import { MCPletServer } from '../../mcplet-server.js';

const MOCK_SERVICE_URL = process.env.MOCK_SERVICE_URL ?? 'http://localhost:5100';

const server = new MCPletServer('email-mcplet');

server.registerTool({
  name: 'send_email',
  description: '指定した宛先にメールを送信します。承認済みキャンペーン通知や予約リマインダーの送信に使用します。',
  inputSchema: {
    type: 'object',
    properties: {
      to: {
        type: 'string',
        description: '送信先メールアドレス',
      },
      subject: {
        type: 'string',
        description: 'メール件名',
      },
      body: {
        type: 'string',
        description: 'メール本文',
      },
      customerId: {
        type: 'string',
        description: '顧客ID (任意)',
      },
    },
    required: ['to', 'subject', 'body'],
  },
  mcpletType: 'action',
  pool: 'media-pool',
  visibility: ['app'],
  auth: {
    required: 'passkey',
    enforcement: 'workflow',
    promptMessage: 'このキャンペーンのメール一括送信を承認してください',
  },
  handler: async (args, authPayload) => {
    // In production: verify authPayload against FIDO2 server here.
    // For demo: log and proceed if authPayload present.
    if (authPayload) {
      console.error(`[email-mcplet] Auth verified (challenge: ${authPayload['challenge'] ?? 'n/a'})`);
    }

    const res = await fetch(`${MOCK_SERVICE_URL}/email/send`, {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify({
        to: args['to'],
        subject: args['subject'],
        body: args['body'],
      }),
    });
    if (!res.ok) throw new Error(`Email service returned ${res.status}`);
    return res.json();
  },
});

await server.listen();