import * as plugins from './tstest.plugins.js';
import { coloredString as cs } from '@push.rocks/consolecolor';
import {
  RuntimeAdapter,
  type RuntimeOptions,
  type RuntimeCommand,
  type RuntimeAvailability,
} from './tstest.classes.runtime.adapter.js';
import { TapParser } from './tstest.classes.tap.parser.js';
import { TsTestLogger } from './tstest.logging.js';
import type { Runtime } from './tstest.classes.runtime.parser.js';

/**
 * Node.js runtime adapter
 * Executes tests using tsrun (TypeScript runner for Node.js)
 */
export class NodeRuntimeAdapter extends RuntimeAdapter {
  readonly id: Runtime = 'node';
  readonly displayName: string = 'Node.js';

  constructor(
    private logger: TsTestLogger,
    private smartshellInstance: any, // SmartShell instance from @push.rocks/smartshell
    private timeoutSeconds: number | null,
    private filterTags: string[]
  ) {
    super();
  }

  /**
   * Check if Node.js and tsrun are available
   */
  async checkAvailable(): Promise<RuntimeAvailability> {
    try {
      // Check Node.js version
      const nodeVersion = process.version;

      // Check if tsrun module is available (imported as dependency)
      if (!plugins.tsrun || !plugins.tsrun.spawnPath) {
        return {
          available: false,
          error: 'tsrun module not found or outdated (requires version 1.6.0+)',
        };
      }

      return {
        available: true,
        version: nodeVersion,
      };
    } catch (error) {
      return {
        available: false,
        error: error.message,
      };
    }
  }

  /**
   * Create command configuration for Node.js test execution
   */
  createCommand(testFile: string, options?: RuntimeOptions): RuntimeCommand {
    const mergedOptions = this.mergeOptions(options);

    // Build tsrun options
    const args: string[] = [];

    if (process.argv.includes('--web')) {
      args.push('--web');
    }

    // Add any extra args
    if (mergedOptions.extraArgs) {
      args.push(...mergedOptions.extraArgs);
    }

    // Set environment variables
    const env = { ...mergedOptions.env };

    if (this.filterTags.length > 0) {
      env.TSTEST_FILTER_TAGS = this.filterTags.join(',');
    }

    return {
      command: 'tsrun',
      args: [testFile, ...args],
      env,
      cwd: mergedOptions.cwd,
    };
  }

  /**
   * Execute a test file in Node.js using tsrun's spawnPath API
   */
  async run(
    testFile: string,
    index: number,
    total: number,
    options?: RuntimeOptions
  ): Promise<TapParser> {
    this.logger.testFileStart(testFile, this.displayName, index, total);
    const tapParser = new TapParser(testFile + ':node', this.logger);

    const mergedOptions = this.mergeOptions(options);

    // Build spawn options
    const spawnOptions: any = {
      cwd: mergedOptions.cwd || process.cwd(),
      env: { ...mergedOptions.env },
      args: [] as string[],
      stdio: 'pipe' as const,
    };

    // Add --web flag if needed
    if (process.argv.includes('--web')) {
      spawnOptions.args.push('--web');
    }

    // Set filter tags as environment variable
    if (this.filterTags.length > 0) {
      spawnOptions.env.TSTEST_FILTER_TAGS = this.filterTags.join(',');
    }

    // Check for 00init.ts file in test directory
    const testDir = plugins.path.dirname(testFile);
    const initFile = plugins.path.join(testDir, '00init.ts');
    const initFileExists = await plugins.smartfile.fs.fileExists(initFile);

    // Determine which file to run
    let fileToRun = testFile;
    let loaderPath: string | null = null;

    // If 00init.ts exists, create a loader file
    if (initFileExists) {
      const absoluteInitFile = plugins.path.resolve(initFile);
      const absoluteTestFile = plugins.path.resolve(testFile);
      const loaderContent = `
import '${absoluteInitFile.replace(/\\/g, '/')}';
import '${absoluteTestFile.replace(/\\/g, '/')}';
`;
      loaderPath = plugins.path.join(testDir, `.loader_${plugins.path.basename(testFile)}`);
      await plugins.smartfile.memory.toFs(loaderContent, loaderPath);
      fileToRun = loaderPath;
    }

    // Spawn the test process using tsrun's spawnPath API
    // Pass undefined for fromFileUrl since fileToRun is already an absolute path
    const tsrunProcess = plugins.tsrun.spawnPath(fileToRun, undefined, spawnOptions);

    // If we created a loader file, clean it up after test execution
    if (loaderPath) {
      const cleanup = () => {
        try {
          if (plugins.smartfile.fs.fileExistsSync(loaderPath)) {
            plugins.smartfile.fs.removeSync(loaderPath);
          }
        } catch (e) {
          // Ignore cleanup errors
        }
      };

      tsrunProcess.childProcess.on('exit', cleanup);
      tsrunProcess.childProcess.on('error', cleanup);
    }

    // Start warning timer if no timeout was specified
    let warningTimer: NodeJS.Timeout | null = null;
    if (this.timeoutSeconds === null) {
      warningTimer = setTimeout(() => {
        console.error('');
        console.error(cs('⚠️  WARNING: Test file is running for more than 1 minute', 'orange'));
        console.error(cs(`   File: ${testFile}`, 'orange'));
        console.error(cs('   Consider using --timeout option to set a timeout for test files.', 'orange'));
        console.error(cs('   Example: tstest test --timeout=300 (for 5 minutes)', 'orange'));
        console.error('');
      }, 60000); // 1 minute
    }

    // Handle timeout if specified
    if (this.timeoutSeconds !== null) {
      const timeoutMs = this.timeoutSeconds * 1000;
      let timeoutId: NodeJS.Timeout;

      const timeoutPromise = new Promise<void>((_resolve, reject) => {
        timeoutId = setTimeout(async () => {
          // Use tsrun's terminate() to gracefully kill the process
          await tsrunProcess.terminate();
          reject(new Error(`Test file timed out after ${this.timeoutSeconds} seconds`));
        }, timeoutMs);
      });

      try {
        await Promise.race([
          tapParser.handleTapProcess(tsrunProcess.childProcess),
          timeoutPromise
        ]);
        // Clear timeout if test completed successfully
        clearTimeout(timeoutId);
      } catch (error) {
        // Clear warning timer if it was set
        if (warningTimer) {
          clearTimeout(warningTimer);
        }
        // Handle timeout error
        tapParser.handleTimeout(this.timeoutSeconds);
        // Ensure process is killed if still running
        try {
          tsrunProcess.kill('SIGKILL');
        } catch (killError) {
          // Process might already be dead
        }
        await tapParser.evaluateFinalResult();
      }
    } else {
      await tapParser.handleTapProcess(tsrunProcess.childProcess);
    }

    // Clear warning timer if it was set
    if (warningTimer) {
      clearTimeout(warningTimer);
    }

    return tapParser;
  }
}