/**
 * Task Commands - Pre-built command templates and execution
 * Handles SSH command execution and validation for individual tasks
 */

class TaskCommands {
  constructor() {
    this.commandTemplates = {
      // App Commands (✅ IMPLEMENTED)
      install: 'libreportal app install {appName} {config}',
      uninstall: 'libreportal app uninstall {appName}',
      restart: 'libreportal app restart {appName}',
      start: 'libreportal app start {appName}',
      stop: 'libreportal app stop {appName}',
      backup: 'libreportal app backup {appName}',
      status: 'libreportal app status {appName}',
      
      // Docker Compose Management (✅ IMPLEMENTED)
      up: 'libreportal app up {appName}',
      down: 'libreportal app down {appName}',
      reload: 'libreportal app reload {appName}',
      
      // System Commands (✅ IMPLEMENTED)
      system_status: 'libreportal system status',
      system_update: 'libreportal system update',
      system_reset: 'libreportal system reset',
      
      // Future Commands (❌ NOT YET IMPLEMENTED)
      // restore: 'libreportal app restore {appName} {backupId}',
      // update_config: 'libreportal config update {appName}',
      // system_info: 'libreportal system info',
      // system_disk: 'libreportal system disk',
      // system_memory: 'libreportal system memory'
    };

    this.commandStatus = {
      // ✅ Available in CLI
      install: 'implemented',
      uninstall: 'implemented',
      restart: 'implemented',
      start: 'implemented',
      stop: 'implemented',
      backup: 'implemented',
      status: 'implemented',
      up: 'implemented',
      down: 'implemented',
      reload: 'implemented',
      system_status: 'implemented',
      system_update: 'implemented',
      system_reset: 'implemented',
      
      // ❌ Not yet implemented in CLI
      restore: 'not_implemented',
      update_config: 'not_implemented',
      system_info: 'not_implemented',
      system_disk: 'not_implemented',
      system_memory: 'not_implemented'
    };
  }

  /**
   * Generate command from template with parameters
   */
  generateCommand(type, params = {}) {
    const template = this.commandTemplates[type];
    if (!template) {
      throw new Error(`Unknown command type: ${type}`);
    }

    let command = template;
    Object.keys(params).forEach(key => {
      const value = params[key] || '';
      command = command.replace(`{${key}}`, value);
    });

    // Clean up double spaces and trailing spaces
    command = command.replace(/\s+/g, ' ').trim();
    
    return command;
  }

  /**
   * Check if command is implemented in CLI
   */
  isCommandImplemented(type) {
    return this.commandStatus[type] === 'implemented';
  }

  /**
   * Get command status
   */
  getCommandStatus(type) {
    return this.commandStatus[type] || 'unknown';
  }

  /**
   * Get only implemented commands
   */
  getImplementedCommands() {
    return Object.keys(this.commandStatus).filter(cmd => this.commandStatus[cmd] === 'implemented');
  }

  /**
   * Get all commands with their status
   */
  getAllCommandsWithStatus() {
    return Object.keys(this.commandStatus).map(cmd => ({
      command: cmd,
      template: this.commandTemplates[cmd],
      status: this.commandStatus[cmd]
    }));
  }

  /**
   * Validate command and check if implemented
   */
  validateCommand(type, params) {
    // Check if command exists
    const template = this.commandTemplates[type];
    if (!template) {
      throw new Error(`Unknown command type: ${type}`);
    }

    // Check if command is implemented
    if (!this.isCommandImplemented(type)) {
      throw new Error(`Command '${type}' is not yet implemented in the CLI system`);
    }

    const requiredParams = {
      install: ['appName'], // config is optional
      uninstall: ['appName'],
      restart: ['appName'],
      start: ['appName'],
      stop: ['appName'],
      backup: ['appName'],
      status: ['appName'],
      up: ['appName'],
      down: ['appName'],
      reload: ['appName']
    };

    const required = requiredParams[type] || [];
    const missing = required.filter(param => !params[param]);

    if (missing.length > 0) {
      throw new Error(`Missing required parameters: ${missing.join(', ')}`);
    }

    return true;
  }

  /**
   * Execute command via API
   */
  async executeCommand(command, taskId) {
    try {
      //// // console.log(`🚀 Executing command: ${command}`);
      
      // Add task to local queue using generic endpoint
      const taskId = `task_${Date.now()}_${Math.random().toString(36).substr(2, 9)}`;
      const taskFileName = `${taskId}.json`;
      const taskFilePath = `tasks/queue/${taskFileName}`;
      
      // console.log('🔍 Creating task file:', taskFilePath);
      // console.log('🔍 Task ID:', taskId);
      
      const task = {
        id: taskId,
        type: 'install',
        app: this.extractAppName(command),
        command: command,
        config: null,
        status: 'queued',
        createdAt: new Date().toISOString(),
        updatedAt: new Date().toISOString()
      };
      
      // console.log('🔍 Task object:', task);
      
      const response = await fetch('/write-file', {
        method: 'POST',
        headers: {
          'Content-Type': 'application/json',
        },
        body: JSON.stringify({
          path: taskFilePath,
          content: JSON.stringify(task, null, 2)
        })
      });

      if (!response.ok) {
        const errorData = await response.json().catch(() => ({}));
        console.error(`❌ API Error Response:`, errorData);
        throw new Error(`Command execution failed: ${response.statusText} - ${errorData.error || 'Unknown error'}`);
      }

      const result = await response.json();
      //// // console.log(`✅ Task queued successfully:`, result);
      
      return {
        success: true,
        output: `Task queued: ${command}`,
        taskId: result.taskId,
        exitCode: 0,
        queued: true
      };
      
    } catch (error) {
      console.error(`❌ Command execution failed:`, error);
      throw new Error(`Command execution failed: ${error.message}`);
    }
  }

  /**
   * Extract app name from command
   */
  extractAppName(command) {
    const match = command.match(/libreportal app (\w+) (.+)/);
    return match ? match[2] : 'unknown';
  }

  /**
   * Execute command via file-based task system
   */
  async executeCommand(command, taskId) {
    //// // console.log(`🔧 Creating task for command: ${command}`);
    
    try {
      // Create task file in queue
      const task = {
        id: taskId,
        command: command,
        status: 'queued',
        created: new Date().toISOString()
      };
      
      // Extract app name from command for better task tracking
      const appNameMatch = command.match(/libreportal app (\w+) (\w+)/);
      if (appNameMatch) {
        task.app = appNameMatch[2];
        task.type = appNameMatch[1];
      }
      
      // Write task file to queue
      await this.createTaskFile(task);
      
      //// // console.log(`✅ Task created: ${taskId}`);
      
      return {
        success: true,
        taskId: taskId,
        message: 'Task queued for execution'
      };
      
    } catch (error) {
      console.error(`❌ Failed to create task:`, error);
      throw new Error(`Task creation failed: ${error.message}`);
    }
  }

  /**
   * Create task file in queue directory
   */
  async createTaskFile(task) {
    const taskFileName = `${task.id}.json`;
    const taskFilePath = `tasks/queue/${taskFileName}`;
    
    try {
      // Write task file using generic endpoint
      const response = await fetch('/write-file', {
        method: 'POST',
        headers: {
          'Content-Type': 'application/json'
        },
        body: JSON.stringify({
          path: taskFilePath,
          content: JSON.stringify(task, null, 2)
        })
      });
      
      if (!response.ok) {
        throw new Error(`Failed to create task file: ${response.statusText}`);
      }
      
      return await response.json();
      
    } catch (error) {
      // Fallback: create file directly (for development)
      console.warn('API not available, using fallback method');
      await this.writeTaskFileDirectly(task);
    }
  }

  /**
   * Direct task file creation (fallback method)
   */
  async writeTaskFileDirectly(task) {
    // This would be implemented server-side
    // For now, we'll simulate the task creation
    //// // console.log(`Task file created: ${task.id}.json`);
    return { success: true, taskId: task.id };
  }

  /**
   * Get available command types
   */
  getCommandTypes() {
    return Object.keys(this.commandTemplates);
  }

  /**
   * Get command template for a type
   */
  getCommandTemplate(type) {
    return this.commandTemplates[type];
  }

  /**
   * Get app data for icon and URL information
   */
  getAppData(appName) {
    if (window.apps && Array.isArray(window.apps)) {
      const target = String(appName || '').toLowerCase();
      const app = window.apps.find(app => {
        const appCommandName = (app.command || '').split(' ').pop();
        return appCommandName.toLowerCase() === target;
      });
      if (app) return app;
    }
    
    // Fallback: create minimal app data
    return {
      name: appName,
      icon: `icons/apps/${appName}.svg`,
      command: `libreportal app install ${appName}`
    };
  }

  /**
   * Trigger enhanced notification with app icon and action button
   *
   * `customIcon` is forwarded to NotificationSystem.show so callers can
   * supply a task-type emoji (install ✅, backup 💾, etc.) for the leftmost
   * icon slot — same style every other task-related notification uses.
   */
  triggerNotification(message, type = 'info', appName = null, appUrl = null, appIcon = null, customIcon = null) {
    if (window.notificationSystem && typeof window.notificationSystem.show === 'function') {
      // Use enhanced notification system
      window.notificationSystem.show(message, type, appName, appUrl, appIcon, customIcon);
    } else if (typeof ConfigShared !== 'undefined' && ConfigShared.showNotification) {
      // Fallback to basic notification
      ConfigShared.showNotification(message, type);
    } else {
      //// // console.log(`🔔 ${type.toUpperCase()}: ${message}`);
    }
  }
}

// Export for use
window.TaskCommands = TaskCommands;