import assert from 'node:assert/strict';
import test from 'node:test';
import { loadConfig } from '../src/config.js';
import { buildServer } from '../src/server.js';
import {
  EXTERNAL_WEBHOOK_CONFIG_ID,
  ExternalWebhookClient,
  type ExternalWebhookFetch
} from '../src/external-webhook-client.js';

const webhookUrl = 'https://gateway.example.test/wechat/webhookInfo/sendMessageByOut';
const webhookToken = 't'.repeat(32);

test('external webhook request uses the confirmed fixed contract exactly', async () => {
  let requestInput: string | URL | Request | undefined;
  let requestInit: RequestInit | undefined;
  const fetchImpl: ExternalWebhookFetch = async (input, init) => {
    requestInput = input;
    requestInit = init;
    return new Response(JSON.stringify({ code: 0, data: true, msg: 'ok' }), {
      status: 200,
      headers: { 'content-type': 'application/json' }
    });
  };
  const client = new ExternalWebhookClient({
    url: webhookUrl,
    token: webhookToken,
    fetchImpl
  });

  const result = await client.send('【员工任务摘要】\n员工：employee-a');

  assert.deepEqual(result, { outcome: 'accepted', httpStatus: 200, errorCode: null });
  assert.equal(requestInput, webhookUrl);
  assert.equal(requestInit?.method, 'POST');
  assert.deepEqual(requestInit?.headers, {
    'Content-Type': 'application/json',
    'x-token': webhookToken
  });
  assert.deepEqual(JSON.parse(String(requestInit?.body)), {
    id: EXTERNAL_WEBHOOK_CONFIG_ID,
    content: '【员工任务摘要】\n员工：employee-a'
  });
  assert.equal(EXTERNAL_WEBHOOK_CONFIG_ID, '9999');
  assert.ok(requestInit?.signal instanceof AbortSignal);
});

test('external webhook accepts only HTTP 200 with code zero and data true', async () => {
  const cases: Array<{
    name: string;
    response?: Response;
    error?: Error;
    expected: Record<string, unknown>;
  }> = [
    {
      name: 'business rejection in HTTP 200',
      response: new Response(JSON.stringify({ code: 1, data: false, msg: 'rejected' }), { status: 200 }),
      expected: { outcome: 'rejected', httpStatus: 200, errorCode: 'webhook_business_rejected' }
    },
    {
      name: 'invalid request',
      response: new Response(JSON.stringify({ code: 400, data: false, msg: 'id and content must not be blank' }), { status: 400 }),
      expected: { outcome: 'rejected', httpStatus: 400, errorCode: 'webhook_invalid_request' }
    },
    {
      name: 'invalid token',
      response: new Response(JSON.stringify({ code: 401, data: false, msg: 'Invalid token' }), { status: 401 }),
      expected: { outcome: 'rejected', httpStatus: 401, errorCode: 'webhook_invalid_token' }
    },
    {
      name: 'missing webhook configuration',
      response: new Response(JSON.stringify({ code: 404, data: false, msg: 'Webhook configuration not found' }), { status: 404 }),
      expected: { outcome: 'rejected', httpStatus: 404, errorCode: 'webhook_configuration_not_found' }
    },
    {
      name: 'server error is uncertain',
      response: new Response(JSON.stringify({ code: 500, data: false, msg: 'error' }), { status: 500 }),
      expected: { outcome: 'uncertain', httpStatus: 500, errorCode: 'webhook_http_500_uncertain' }
    },
    {
      name: 'invalid success response is uncertain',
      response: new Response('not-json', { status: 200 }),
      expected: { outcome: 'uncertain', httpStatus: 200, errorCode: 'webhook_response_invalid_json' }
    },
    {
      name: 'network failure is uncertain',
      error: new Error('connection reset'),
      expected: { outcome: 'uncertain', httpStatus: null, errorCode: 'webhook_request_uncertain' }
    },
    {
      name: 'timeout is uncertain',
      error: new DOMException('timed out', 'TimeoutError'),
      expected: { outcome: 'uncertain', httpStatus: null, errorCode: 'webhook_request_timeout' }
    }
  ];

  for (const item of cases) {
    const client = new ExternalWebhookClient({
      url: webhookUrl,
      token: webhookToken,
      fetchImpl: async () => {
        if (item.error) throw item.error;
        return item.response as Response;
      }
    });
    assert.deepEqual(await client.send('summary'), item.expected, item.name);
  }
});

test('webhook configuration is fail-closed and independent from AgentBus configuration', () => {
  const encryptionKey = Buffer.alloc(32, 23).toString('base64');
  const disabled = loadConfig({ NODE_ENV: 'test', FIELD_ENCRYPTION_KEY: encryptionKey });
  assert.equal(disabled.leaderSummaryWebhookEnabled, false);
  assert.equal(disabled.agentBusEnabled, false);

  const configured = loadConfig({
    NODE_ENV: 'test',
    FIELD_ENCRYPTION_KEY: encryptionKey,
    WEBHOOK_SEND_URL: webhookUrl,
    WEBHOOK_EXTERNAL_TOKEN: webhookToken
  });
  assert.equal(configured.leaderSummaryWebhookEnabled, true);
  assert.equal(configured.leaderSummaryWebhookConfigurationError, null);
  assert.equal(configured.agentBusEnabled, false);

  const incomplete = loadConfig({
    NODE_ENV: 'test',
    FIELD_ENCRYPTION_KEY: encryptionKey,
    WEBHOOK_EXTERNAL_TOKEN: webhookToken
  });
  assert.equal(incomplete.leaderSummaryWebhookEnabled, false);
  assert.equal(incomplete.leaderSummaryWebhookConfigurationError, 'webhook_configuration_incomplete');
  assert.equal(incomplete.agentBusEnabled, false);

  const shortToken = loadConfig({
    NODE_ENV: 'test',
    FIELD_ENCRYPTION_KEY: encryptionKey,
    WEBHOOK_SEND_URL: webhookUrl,
    WEBHOOK_EXTERNAL_TOKEN: 'too-short'
  });
  assert.equal(shortToken.leaderSummaryWebhookEnabled, false);
  assert.equal(shortToken.leaderSummaryWebhookConfigurationError, 'webhook_token_length_invalid');

  const paddedToken = loadConfig({
    NODE_ENV: 'test',
    FIELD_ENCRYPTION_KEY: encryptionKey,
    WEBHOOK_SEND_URL: webhookUrl,
    WEBHOOK_EXTERNAL_TOKEN: ` ${webhookToken}`
  });
  assert.equal(paddedToken.leaderSummaryWebhookEnabled, false);
  assert.equal(paddedToken.leaderSummaryWebhookConfigurationError, 'webhook_token_length_invalid');

  const whitespaceToken = loadConfig({
    NODE_ENV: 'test',
    FIELD_ENCRYPTION_KEY: encryptionKey,
    WEBHOOK_SEND_URL: webhookUrl,
    WEBHOOK_EXTERNAL_TOKEN: ` ${'t'.repeat(31)}`
  });
  assert.equal(whitespaceToken.leaderSummaryWebhookEnabled, false);
  assert.equal(whitespaceToken.leaderSummaryWebhookConfigurationError, 'webhook_token_whitespace_invalid');

  const unconfirmedRoute = loadConfig({
    NODE_ENV: 'test',
    FIELD_ENCRYPTION_KEY: encryptionKey,
    WEBHOOK_SEND_URL: 'https://gateway.example.test/wechat/another-route',
    WEBHOOK_EXTERNAL_TOKEN: webhookToken
  });
  assert.equal(unconfirmedRoute.leaderSummaryWebhookEnabled, false);
  assert.equal(unconfirmedRoute.leaderSummaryWebhookConfigurationError, 'webhook_route_unconfirmed');

  const insecureProductionUrl = loadConfig({
    NODE_ENV: 'production',
    FIELD_ENCRYPTION_KEY: encryptionKey,
    WEBHOOK_SEND_URL: 'http://gateway.example.test/wechat/webhookInfo/sendMessageByOut',
    WEBHOOK_EXTERNAL_TOKEN: webhookToken
  });
  assert.equal(insecureProductionUrl.leaderSummaryWebhookEnabled, false);
  assert.equal(insecureProductionUrl.leaderSummaryWebhookConfigurationError, 'webhook_https_required');
});

test('client rejects blank content and malformed tokens before making a request', async () => {
  let calls = 0;
  const fetchImpl: ExternalWebhookFetch = async () => {
    calls += 1;
    return new Response('{}', { status: 200 });
  };
  await assert.rejects(
    new ExternalWebhookClient({ url: webhookUrl, token: webhookToken, fetchImpl }).send('  '),
    /must not be blank/
  );
  await assert.rejects(
    new ExternalWebhookClient({ url: webhookUrl, token: 'short', fetchImpl }).send('summary'),
    /exactly 32 non-whitespace characters/
  );
  await assert.rejects(
    new ExternalWebhookClient({ url: webhookUrl, token: ` ${'t'.repeat(31)}`, fetchImpl }).send('summary'),
    /exactly 32 non-whitespace characters/
  );
  assert.equal(calls, 0);
});

test('invalid configuration or webhook initialization failure does not block the normal HTTP service', async () => {
  const encryptionKey = Buffer.alloc(32, 29).toString('base64');
  const configs = [
    loadConfig({
      NODE_ENV: 'test',
      FIELD_ENCRYPTION_KEY: encryptionKey,
      WEBHOOK_EXTERNAL_TOKEN: webhookToken,
      DATABASE_URL: 'postgresql://invalid:invalid@127.0.0.1:1/invalid'
    }),
    loadConfig({
      NODE_ENV: 'test',
      FIELD_ENCRYPTION_KEY: encryptionKey,
      WEBHOOK_SEND_URL: webhookUrl,
      WEBHOOK_EXTERNAL_TOKEN: webhookToken,
      DATABASE_URL: 'postgresql://invalid:invalid@127.0.0.1:1/invalid'
    })
  ];

  for (const config of configs) {
    const { app } = await buildServer({ config, startParserLoop: false });
    try {
      const response = await app.inject({ method: 'GET', url: '/health/live' });
      assert.equal(response.statusCode, 200);
      assert.equal(response.json().ok, true);
    } finally {
      await app.close();
    }
  }
});