import 'dotenv/config';

import assert from 'node:assert/strict';
import http from 'node:http';
import https from 'node:https';

import * as mariadb from 'mariadb';

function unique(values) {
  return [...new Set(values.filter(Boolean))];
}

function requestUrl(targetUrl) {
  const url = new URL(targetUrl);
  const transport = url.protocol === 'https:' ? https : http;

  return new Promise((resolve, reject) => {
    const request = transport.get(url, (response) => {
      let body = '';

      response.on('data', (chunk) => {
        body += chunk;
      });

      response.on('end', () => {
        resolve({
          body,
          statusCode: response.statusCode
        });
      });
    });

    request.on('error', reject);
  });
}

async function getJson(targetUrl) {
  const response = await requestUrl(targetUrl);

  return {
    ...response,
    json: JSON.parse(response.body)
  };
}

async function testApi() {
  const appPort = Number(process.env.PORT || 3000);
  const candidates = unique([
    process.env.APP_URL,
    `http://localhost:${appPort}`,
    `http://app:${appPort}`
  ]);

  let lastError;

  for (const baseUrl of candidates) {
    try {
      const health = await getJson(`${baseUrl}/api/health`);

      assert.equal(health.statusCode, 200, `Unexpected health status from ${baseUrl}`);
      assert.equal(health.json.status, 'ok', 'API health endpoint is not healthy');
      assert.equal(health.json.service, 'check-list-poc-api', 'Unexpected API service name');
      assert.equal(health.json.database, 'connected', 'API cannot reach MariaDB');

      const templates = await getJson(`${baseUrl}/api/templates`);

      assert.equal(templates.statusCode, 200, `Unexpected templates status from ${baseUrl}`);
      assert.ok(Array.isArray(templates.json.items), 'Templates response must contain an items array');
      assert.ok(templates.json.items.length >= 1, 'Seeded templates are missing');

      return {
        baseUrl,
        health: health.json,
        templates: templates.json.items
      };
    } catch (error) {
      lastError = error;
    }
  }

  throw lastError;
}

async function testDatabase() {
  const candidates = unique([
    process.env.DB_HOST,
    '127.0.0.1',
    'localhost',
    'db'
  ]);

  let lastError;

  for (const host of candidates) {
    const pool = mariadb.createPool({
      host,
      port: Number(process.env.DB_PORT || 3306),
      user: process.env.DB_USER || 'check_list_user',
      password: process.env.DB_PASSWORD || 'check_list_password',
      database: process.env.DB_NAME || 'check_list',
      connectionLimit: 1
    });

    try {
      const connection = await pool.getConnection();
      const rows = await connection.query(
        'SELECT code FROM templates ORDER BY id'
      );

      connection.release();
      await pool.end();

      assert.ok(rows.some((row) => row.code === 'incoming-inspection'), 'Expected seed template is missing');

      return { host, rows };
    } catch (error) {
      lastError = error;
      await pool.end();
    }
  }

  throw lastError;
}

async function testPhpMyAdmin() {
  const candidates = unique([
    'http://phpmyadmin/',
    `http://localhost:${process.env.PHPMYADMIN_PORT || 8080}/`
  ]);

  let lastError;

  for (const url of candidates) {
    try {
      const response = await requestUrl(url);

      assert.equal(response.statusCode, 200, `Unexpected phpMyAdmin status from ${url}`);
      assert.match(response.body, /phpMyAdmin/i, 'phpMyAdmin landing page did not load');

      return { url };
    } catch (error) {
      lastError = error;
    }
  }

  throw lastError;
}

async function main() {
  const apiResult = await testApi();
  const databaseResult = await testDatabase();
  const phpMyAdminResult = await testPhpMyAdmin();

  console.log('Environment test passed');
  console.log(`API endpoint: ${apiResult.baseUrl}`);
  console.log(`Seed templates: ${apiResult.templates.length}`);
  console.log(`Database host: ${databaseResult.host}`);
  console.log(`phpMyAdmin: ${phpMyAdminResult.url}`);
}

main().catch((error) => {
  console.error('Environment test failed');
  console.error(error.message);
  process.exit(1);
});