import * as plugins from './tstest.plugins.js';
import { coloredString as cs } from '@push.rocks/consolecolor';
import {
  RuntimeAdapter,
  type DenoOptions,
  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';

/**
 * Deno runtime adapter
 * Executes tests using the Deno runtime
 */
export class DenoRuntimeAdapter extends RuntimeAdapter {
  readonly id: Runtime = 'deno';
  readonly displayName: string = 'Deno';

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

  /**
   * Get default Deno options
   */
  protected getDefaultOptions(): DenoOptions {
    return {
      ...super.getDefaultOptions(),
      permissions: [
        '--allow-read',
        '--allow-env',
        '--allow-net',
        '--allow-write',
        '--allow-sys',        // Allow system info access
        '--allow-import',     // Allow npm/node imports
        '--node-modules-dir', // Enable Node.js compatibility mode
        '--sloppy-imports',   // Allow .js imports to resolve to .ts files
      ],
    };
  }

  /**
   * Check if Deno is available
   */
  async checkAvailable(): Promise<RuntimeAvailability> {
    try {
      const result = await this.smartshellInstance.exec('deno --version', {
        cwd: process.cwd(),
        onError: () => {
          // Ignore error
        }
      });

      if (result.exitCode !== 0) {
        return {
          available: false,
          error: 'Deno not found. Install from: https://deno.land/',
        };
      }

      // Parse Deno version from output (first line is "deno X.Y.Z")
      const versionMatch = result.stdout.match(/deno (\d+\.\d+\.\d+)/);
      const version = versionMatch ? versionMatch[1] : 'unknown';

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

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

    const args: string[] = ['run'];

    // Add permissions
    const permissions = mergedOptions.permissions || [
      '--allow-read',
      '--allow-env',
      '--allow-net',
      '--allow-write',
      '--allow-sys',
      '--allow-import',
      '--node-modules-dir',
      '--sloppy-imports',
    ];
    args.push(...permissions);

    // Add config file if specified
    if (mergedOptions.configPath) {
      args.push('--config', mergedOptions.configPath);
    }

    // Add import map if specified
    if (mergedOptions.importMap) {
      args.push('--import-map', mergedOptions.importMap);
    }

    // Add extra args
    if (mergedOptions.extraArgs && mergedOptions.extraArgs.length > 0) {
      args.push(...mergedOptions.extraArgs);
    }

    // Add test file
    args.push(testFile);

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

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

    return {
      command: 'deno',
      args,
      env,
      cwd: mergedOptions.cwd,
    };
  }

  /**
   * Execute a test file in Deno
   */
  async run(
    testFile: string,
    index: number,
    total: number,
    options?: DenoOptions
  ): Promise<TapParser> {
    this.logger.testFileStart(testFile, this.displayName, index, total);
    const tapParser = new TapParser(testFile + ':deno', this.logger);

    const mergedOptions = this.mergeOptions(options) as DenoOptions;

    // Build Deno command
    const command = this.createCommand(testFile, mergedOptions);
    const fullCommand = `${command.command} ${command.args.join(' ')}`;

    // Set filter tags as environment variable
    if (this.filterTags.length > 0) {
      process.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);

    let runCommand = fullCommand;
    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);

      // Rebuild command with loader file
      const loaderCommand = this.createCommand(loaderPath, mergedOptions);
      runCommand = `${loaderCommand.command} ${loaderCommand.args.join(' ')}`;
    }

    const execResultStreaming = await this.smartshellInstance.execStreamingSilent(runCommand);

    // 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
        }
      };

      execResultStreaming.childProcess.on('exit', cleanup);
      execResultStreaming.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 smartshell's terminate() to kill entire process tree
          await execResultStreaming.terminate();
          reject(new Error(`Test file timed out after ${this.timeoutSeconds} seconds`));
        }, timeoutMs);
      });

      try {
        await Promise.race([
          tapParser.handleTapProcess(execResultStreaming.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 entire process tree is killed if still running
        try {
          await execResultStreaming.kill(); // This kills the entire process tree with SIGKILL
        } catch (killError) {
          // Process tree might already be dead
        }
        await tapParser.evaluateFinalResult();
      }
    } else {
      await tapParser.handleTapProcess(execResultStreaming.childProcess);
    }

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

    return tapParser;
  }
}