/**
 * Native Composer CLI Testing
 * Tests the Composer registry implementation using the actual composer CLI
 */

import { expect, tap } from '@git.zone/tstest/tapbundle';
import { tapNodeTools } from '@git.zone/tstest/tapbundle_serverside';
import { SmartRegistry } from '../ts/index.js';
import { createTestRegistry, createTestTokens, createComposerZip } from './helpers/registry.js';
import type { IRequestContext, IResponse } from '../ts/core/interfaces.core.js';
import * as http from 'http';
import * as url from 'url';
import * as fs from 'fs';
import * as path from 'path';

// Test context
let registry: SmartRegistry;
let server: http.Server;
let registryUrl: string;
let registryPort: number;
let composerToken: string;
let testDir: string;
let composerHome: string;

/**
 * Create HTTP server wrapper around SmartRegistry
 */
async function createHttpServer(
  registryInstance: SmartRegistry,
  port: number
): Promise<{ server: http.Server; url: string }> {
  return new Promise((resolve, reject) => {
    const httpServer = http.createServer(async (req, res) => {
      try {
        // Parse request
        const parsedUrl = url.parse(req.url || '', true);
        const pathname = parsedUrl.pathname || '/';
        const query = parsedUrl.query;

        // Read body
        const chunks: Buffer[] = [];
        for await (const chunk of req) {
          chunks.push(chunk);
        }
        const bodyBuffer = Buffer.concat(chunks);

        // Parse body based on content type
        let body: any;
        if (bodyBuffer.length > 0) {
          const contentType = req.headers['content-type'] || '';
          if (contentType.includes('application/json')) {
            try {
              body = JSON.parse(bodyBuffer.toString('utf-8'));
            } catch (error) {
              body = bodyBuffer;
            }
          } else {
            body = bodyBuffer;
          }
        }

        // Convert to IRequestContext
        const context: IRequestContext = {
          method: req.method || 'GET',
          path: pathname,
          headers: req.headers as Record<string, string>,
          query: query as Record<string, string>,
          body: body,
        };

        // Handle request
        const response: IResponse = await registryInstance.handleRequest(context);

        // Convert IResponse to HTTP response
        res.statusCode = response.status;

        // Set headers
        for (const [key, value] of Object.entries(response.headers || {})) {
          res.setHeader(key, value);
        }

        // Send body
        if (response.body) {
          if (Buffer.isBuffer(response.body)) {
            res.end(response.body);
          } else if (typeof response.body === 'string') {
            res.end(response.body);
          } else {
            res.setHeader('Content-Type', 'application/json');
            res.end(JSON.stringify(response.body));
          }
        } else {
          res.end();
        }
      } catch (error) {
        console.error('Server error:', error);
        res.statusCode = 500;
        res.setHeader('Content-Type', 'application/json');
        res.end(JSON.stringify({ error: 'INTERNAL_ERROR', message: String(error) }));
      }
    });

    httpServer.listen(port, () => {
      const serverUrl = `http://localhost:${port}`;
      resolve({ server: httpServer, url: serverUrl });
    });

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

/**
 * Setup Composer auth.json for authentication
 */
function setupComposerAuth(
  token: string,
  composerHomeArg: string,
  serverUrl: string,
  port: number
): string {
  fs.mkdirSync(composerHomeArg, { recursive: true });

  const authJson = {
    'http-basic': {
      [`localhost:${port}`]: {
        username: 'testuser',
        password: token,
      },
    },
  };

  const authPath = path.join(composerHomeArg, 'auth.json');
  fs.writeFileSync(authPath, JSON.stringify(authJson, null, 2), 'utf-8');

  return authPath;
}

/**
 * Create a Composer project that uses our registry
 */
function createComposerProject(
  projectDir: string,
  serverUrl: string
): void {
  fs.mkdirSync(projectDir, { recursive: true });

  const composerJson = {
    name: 'test/consumer-project',
    description: 'Test consumer project for Composer CLI tests',
    type: 'project',
    require: {},
    repositories: [
      {
        type: 'composer',
        url: `${serverUrl}/composer`,
      },
    ],
    config: {
      'secure-http': false,
    },
  };

  fs.writeFileSync(
    path.join(projectDir, 'composer.json'),
    JSON.stringify(composerJson, null, 2),
    'utf-8'
  );
}

/**
 * Run Composer command with custom home directory
 */
async function runComposerCommand(
  command: string,
  cwd: string
): Promise<{ stdout: string; stderr: string; exitCode: number }> {
  const fullCommand = `cd "${cwd}" && COMPOSER_HOME="${composerHome}" composer ${command}`;

  try {
    const result = await tapNodeTools.runCommand(fullCommand);
    return {
      stdout: result.stdout || '',
      stderr: result.stderr || '',
      exitCode: result.exitCode || 0,
    };
  } catch (error: any) {
    return {
      stdout: error.stdout || '',
      stderr: error.stderr || String(error),
      exitCode: error.exitCode || 1,
    };
  }
}

/**
 * Upload a Composer package via HTTP API
 */
async function uploadComposerPackage(
  vendorPackage: string,
  version: string,
  token: string,
  serverUrl: string
): Promise<void> {
  const zipData = await createComposerZip(vendorPackage, version);

  const response = await fetch(`${serverUrl}/composer/packages/${vendorPackage}`, {
    method: 'PUT',
    headers: {
      'Content-Type': 'application/zip',
      Authorization: `Bearer ${token}`,
    },
    body: zipData,
  });

  if (!response.ok) {
    const body = await response.text();
    throw new Error(`Failed to upload package: ${response.status} ${body}`);
  }
}

/**
 * Cleanup test directory
 */
function cleanupTestDir(dir: string): void {
  if (fs.existsSync(dir)) {
    fs.rmSync(dir, { recursive: true, force: true });
  }
}

// ========================================================================
// TESTS
// ========================================================================

tap.test('Composer CLI: should verify composer is installed', async () => {
  try {
    const result = await tapNodeTools.runCommand('composer --version');
    console.log('Composer version output:', result.stdout.substring(0, 200));
    expect(result.exitCode).toEqual(0);
  } catch (error) {
    console.log('Composer CLI not available, skipping native CLI tests');
    // Skip remaining tests if Composer is not installed
    tap.skip.test('Composer CLI: remaining tests skipped - composer not available');
    return;
  }
});

tap.test('Composer CLI: should setup registry and HTTP server', async () => {
  // Create registry
  registry = await createTestRegistry();
  const tokens = await createTestTokens(registry);
  composerToken = tokens.composerToken;

  expect(registry).toBeInstanceOf(SmartRegistry);
  expect(composerToken).toBeTypeOf('string');

  // Use port 38000 (avoids conflicts with other tests)
  registryPort = 38000;
  const serverSetup = await createHttpServer(registry, registryPort);
  server = serverSetup.server;
  registryUrl = serverSetup.url;

  expect(server).toBeDefined();
  expect(registryUrl).toEqual(`http://localhost:${registryPort}`);

  // Setup test directory
  testDir = path.join(process.cwd(), '.nogit', 'test-composer-cli');
  cleanupTestDir(testDir);
  fs.mkdirSync(testDir, { recursive: true });

  // Setup COMPOSER_HOME directory
  composerHome = path.join(testDir, '.composer');
  fs.mkdirSync(composerHome, { recursive: true });

  // Setup Composer auth
  const authPath = setupComposerAuth(composerToken, composerHome, registryUrl, registryPort);
  expect(fs.existsSync(authPath)).toEqual(true);
});

tap.test('Composer CLI: should verify server is responding', async () => {
  // Check server is up by doing a direct HTTP request
  const response = await fetch(`${registryUrl}/composer/packages.json`);
  expect(response.status).toBeGreaterThanOrEqual(200);
  expect(response.status).toBeLessThan(500);
});

tap.test('Composer CLI: should upload a package via API', async () => {
  const vendorPackage = 'testvendor/test-package';
  const version = '1.0.0';

  await uploadComposerPackage(vendorPackage, version, composerToken, registryUrl);

  // Verify package exists via packages.json
  const response = await fetch(`${registryUrl}/composer/packages.json`);
  expect(response.status).toEqual(200);

  const packagesJson = await response.json();
  expect(packagesJson.packages).toBeDefined();
  expect(packagesJson.packages[vendorPackage]).toBeDefined();
});

tap.test('Composer CLI: should require package from registry', async () => {
  const projectDir = path.join(testDir, 'consumer-project');
  createComposerProject(projectDir, registryUrl);

  // Try to require the package we uploaded
  const result = await runComposerCommand(
    'require testvendor/test-package:1.0.0 --no-interaction',
    projectDir
  );
  console.log('composer require output:', result.stdout);
  console.log('composer require stderr:', result.stderr);

  expect(result.exitCode).toEqual(0);
});

tap.test('Composer CLI: should verify package in vendor directory', async () => {
  const projectDir = path.join(testDir, 'consumer-project');
  const packageDir = path.join(projectDir, 'vendor', 'testvendor', 'test-package');

  expect(fs.existsSync(packageDir)).toEqual(true);

  // Check composer.json exists in package
  const packageComposerPath = path.join(packageDir, 'composer.json');
  expect(fs.existsSync(packageComposerPath)).toEqual(true);
});

tap.test('Composer CLI: should upload second version', async () => {
  const vendorPackage = 'testvendor/test-package';
  const version = '2.0.0';

  await uploadComposerPackage(vendorPackage, version, composerToken, registryUrl);

  // Verify both versions exist
  const response = await fetch(`${registryUrl}/composer/packages.json`);
  const packagesJson = await response.json();

  expect(packagesJson.packages[vendorPackage]['1.0.0']).toBeDefined();
  expect(packagesJson.packages[vendorPackage]['2.0.0']).toBeDefined();
});

tap.test('Composer CLI: should update to new version', async () => {
  const projectDir = path.join(testDir, 'consumer-project');

  // Update to version 2.0.0
  const result = await runComposerCommand(
    'require testvendor/test-package:2.0.0 --no-interaction',
    projectDir
  );
  console.log('composer update output:', result.stdout);

  expect(result.exitCode).toEqual(0);

  // Verify composer.lock has the new version
  const lockPath = path.join(projectDir, 'composer.lock');
  expect(fs.existsSync(lockPath)).toEqual(true);

  const lockContent = JSON.parse(fs.readFileSync(lockPath, 'utf-8'));
  const pkg = lockContent.packages.find((p: any) => p.name === 'testvendor/test-package');
  expect(pkg?.version).toEqual('2.0.0');
});

tap.test('Composer CLI: should search for packages', async () => {
  const projectDir = path.join(testDir, 'consumer-project');

  // Search for packages (may not work on all Composer versions)
  const result = await runComposerCommand(
    'search testvendor --no-interaction 2>&1 || true',
    projectDir
  );
  console.log('composer search output:', result.stdout);

  // Search may or may not work depending on registry implementation
  // Just verify it doesn't crash
  expect(result.exitCode).toBeLessThanOrEqual(1);
});

tap.test('Composer CLI: should show package info', async () => {
  const projectDir = path.join(testDir, 'consumer-project');

  const result = await runComposerCommand(
    'show testvendor/test-package --no-interaction',
    projectDir
  );
  console.log('composer show output:', result.stdout);

  expect(result.exitCode).toEqual(0);
  expect(result.stdout).toContain('testvendor/test-package');
});

tap.test('Composer CLI: should remove package', async () => {
  const projectDir = path.join(testDir, 'consumer-project');

  const result = await runComposerCommand(
    'remove testvendor/test-package --no-interaction',
    projectDir
  );
  console.log('composer remove output:', result.stdout);

  expect(result.exitCode).toEqual(0);

  // Verify package is removed from vendor
  const packageDir = path.join(projectDir, 'vendor', 'testvendor', 'test-package');
  expect(fs.existsSync(packageDir)).toEqual(false);
});

tap.postTask('cleanup composer cli tests', async () => {
  // Stop server
  if (server) {
    await new Promise<void>((resolve) => {
      server.close(() => resolve());
    });
  }

  // Cleanup test directory
  if (testDir) {
    cleanupTestDir(testDir);
  }

  // Destroy registry
  if (registry) {
    registry.destroy();
  }
});

export default tap.start();