import * as plugins from './tswatch.plugins.js';
import * as paths from './tswatch.paths.js';
import * as interfaces from './interfaces/index.js';
import { ConfigHandler } from './tswatch.classes.confighandler.js';
import { logger } from './tswatch.logging.js';

const CONFIG_KEY = '@git.zone/tswatch';

/**
 * Interactive init wizard for creating tswatch configuration
 */
export class TswatchInit {
  private configHandler: ConfigHandler;
  private smartInteract: plugins.smartinteract.SmartInteract;

  constructor() {
    this.configHandler = new ConfigHandler();
    this.smartInteract = new plugins.smartinteract.SmartInteract([]);
  }

  /**
   * Run the interactive init wizard
   */
  public async run(): Promise<interfaces.ITswatchConfig | null> {
    console.log('\n=== tswatch Configuration Wizard ===\n');

    // Ask for template choice
    const templateAnswer = await this.smartInteract.askQuestion({
      name: 'template',
      type: 'list',
      message: 'Select a configuration template:',
      default: 'npm',
      choices: [
        { name: 'npm - Watch ts/ and test/, run npm test', value: 'npm' },
        { name: 'test - Watch ts/ and test/, run npm run test2', value: 'test' },
        { name: 'service - Watch ts/, restart npm run startTs', value: 'service' },
        { name: 'element - Dev server + bundling for web components', value: 'element' },
        { name: 'website - Full stack: backend + frontend + assets', value: 'website' },
        { name: 'custom - Configure watchers manually', value: 'custom' },
      ],
    });

    const template = templateAnswer.value as string;

    let config: interfaces.ITswatchConfig;

    if (template === 'custom') {
      config = await this.runCustomWizard();
    } else {
      // Get preset config
      const preset = this.configHandler.getPreset(template);
      if (!preset) {
        console.error(`Unknown template: ${template}`);
        return null;
      }
      config = { ...preset, preset: template as interfaces.ITswatchConfig['preset'] };
    }

    // Save to npmextra.json
    await this.saveConfig(config);

    console.log('\nConfiguration saved to npmextra.json');
    console.log('Run "tswatch" to start watching.\n');

    return config;
  }

  /**
   * Run custom configuration wizard
   */
  private async runCustomWizard(): Promise<interfaces.ITswatchConfig> {
    const config: interfaces.ITswatchConfig = {};

    // Ask about server
    const serverAnswer = await this.smartInteract.askQuestion({
      name: 'enableServer',
      type: 'confirm',
      message: 'Enable development server?',
      default: false,
    });

    if (serverAnswer.value) {
      const portAnswer = await this.smartInteract.askQuestion({
        name: 'port',
        type: 'input',
        message: 'Server port:',
        default: '3002',
      });

      const serveDirAnswer = await this.smartInteract.askQuestion({
        name: 'serveDir',
        type: 'input',
        message: 'Directory to serve:',
        default: './dist_watch/',
      });

      config.server = {
        enabled: true,
        port: parseInt(portAnswer.value as string, 10),
        serveDir: serveDirAnswer.value as string,
        liveReload: true,
      };
    }

    // Add watchers
    config.watchers = [];
    let addMore = true;

    while (addMore) {
      console.log('\n--- Add a watcher ---');

      const nameAnswer = await this.smartInteract.askQuestion({
        name: 'name',
        type: 'input',
        message: 'Watcher name:',
        default: `watcher-${config.watchers.length + 1}`,
      });

      const watchAnswer = await this.smartInteract.askQuestion({
        name: 'watch',
        type: 'input',
        message: 'Glob pattern(s) to watch (comma-separated):',
        default: './ts/**/*',
      });

      const commandAnswer = await this.smartInteract.askQuestion({
        name: 'command',
        type: 'input',
        message: 'Command to execute:',
        default: 'npm run test',
      });

      const restartAnswer = await this.smartInteract.askQuestion({
        name: 'restart',
        type: 'confirm',
        message: 'Restart command on each change (vs queue)?',
        default: true,
      });

      // Parse watch patterns
      const watchPatterns = (watchAnswer.value as string)
        .split(',')
        .map((p) => p.trim())
        .filter((p) => p.length > 0);

      config.watchers.push({
        name: nameAnswer.value as string,
        watch: watchPatterns.length === 1 ? watchPatterns[0] : watchPatterns,
        command: commandAnswer.value as string,
        restart: restartAnswer.value as boolean,
        debounce: 300,
        runOnStart: true,
      });

      const moreAnswer = await this.smartInteract.askQuestion({
        name: 'addMore',
        type: 'confirm',
        message: 'Add another watcher?',
        default: false,
      });

      addMore = moreAnswer.value as boolean;
    }

    return config;
  }

  /**
   * Save configuration to npmextra.json
   */
  private async saveConfig(config: interfaces.ITswatchConfig): Promise<void> {
    const npmextraPath = plugins.path.join(paths.cwd, 'npmextra.json');

    // Read existing npmextra.json if it exists
    let existingConfig: Record<string, any> = {};
    try {
      const smartfsInstance = new plugins.smartfs.SmartFs(new plugins.smartfs.SmartFsProviderNode());
      const content = await smartfsInstance.file(npmextraPath).encoding('utf8').read() as string;
      existingConfig = JSON.parse(content);
    } catch {
      // File doesn't exist or is invalid, start fresh
    }

    // Update with new tswatch config
    existingConfig[CONFIG_KEY] = config;

    // Write back
    const smartfsInstance = new plugins.smartfs.SmartFs(new plugins.smartfs.SmartFsProviderNode());
    await smartfsInstance.file(npmextraPath).encoding('utf8').write(JSON.stringify(existingConfig, null, 2));
  }
}

/**
 * Run the init wizard
 */
export const runInit = async (): Promise<interfaces.ITswatchConfig | null> => {
  const init = new TswatchInit();
  return init.run();
};