import { InMemorySessionRepository } from '@/packages/infrastructure/repositories/InMemorySessionRepository';
import { MockBrowserAutomationAdapter } from '@/packages/infrastructure/adapters/automation/MockBrowserAutomationAdapter';
import { BrowserDevToolsAdapter } from '@/packages/infrastructure/adapters/automation/BrowserDevToolsAdapter';
import { NutJsAutomationAdapter } from '@/packages/infrastructure/adapters/automation/NutJsAutomationAdapter';
import { MockAutomationEngineAdapter } from '@/packages/infrastructure/adapters/automation/MockAutomationEngineAdapter';
import { StartAutomationSessionUseCase } from '@/packages/application/use-cases/StartAutomationSessionUseCase';
import { loadAutomationConfig, AutomationMode } from '@/packages/infrastructure/config';
import { PinoLogAdapter } from '@/packages/infrastructure/adapters/logging/PinoLogAdapter';
import { NoOpLogAdapter } from '@/packages/infrastructure/adapters/logging/NoOpLogAdapter';
import { loadLoggingConfig } from '@/packages/infrastructure/config/LoggingConfig';
import type { ISessionRepository } from '@/packages/application/ports/ISessionRepository';
import type { IBrowserAutomation } from '@/packages/application/ports/IBrowserAutomation';
import type { IAutomationEngine } from '@/packages/application/ports/IAutomationEngine';
import type { ILogger } from '@/packages/application/ports/ILogger';

export interface BrowserConnectionResult {
  success: boolean;
  error?: string;
}

/**
 * Create logger based on environment configuration.
 * In test environment, returns NoOpLogAdapter for silent logging.
 */
function createLogger(): ILogger {
  const config = loadLoggingConfig();
  
  if (process.env.NODE_ENV === 'test') {
    return new NoOpLogAdapter();
  }
  
  return new PinoLogAdapter(config);
}

/**
 * Create browser automation adapter based on configuration mode.
 *
 * @param mode - The automation mode from configuration
 * @param logger - Logger instance for the adapter
 * @returns IBrowserAutomation adapter instance
 */
function createBrowserAutomationAdapter(mode: AutomationMode, logger: ILogger): IBrowserAutomation {
  const config = loadAutomationConfig();
  
  switch (mode) {
    case 'dev':
      return new BrowserDevToolsAdapter({
        debuggingPort: config.devTools?.debuggingPort,
        browserWSEndpoint: config.devTools?.browserWSEndpoint,
        defaultTimeout: config.defaultTimeout,
      }, logger.child({ adapter: 'BrowserDevTools' }));
    
    case 'production':
      return new NutJsAutomationAdapter({
        mouseSpeed: config.nutJs?.mouseSpeed,
        keyboardDelay: config.nutJs?.keyboardDelay,
        defaultTimeout: config.defaultTimeout,
      }, logger.child({ adapter: 'NutJs' }));
    
    case 'mock':
    default:
      return new MockBrowserAutomationAdapter();
  }
}

export class DIContainer {
  private static instance: DIContainer;
  
  private logger: ILogger;
  private sessionRepository: ISessionRepository;
  private browserAutomation: IBrowserAutomation;
  private automationEngine: IAutomationEngine;
  private startAutomationUseCase: StartAutomationSessionUseCase;
  private automationMode: AutomationMode;

  private constructor() {
    // Initialize logger first - it's needed by other components
    this.logger = createLogger();
    this.logger.info('DIContainer initializing', { automationMode: process.env.AUTOMATION_MODE });
    
    const config = loadAutomationConfig();
    this.automationMode = config.mode;
    
    this.sessionRepository = new InMemorySessionRepository();
    this.browserAutomation = createBrowserAutomationAdapter(config.mode, this.logger);
    this.automationEngine = new MockAutomationEngineAdapter(
      this.browserAutomation,
      this.sessionRepository
    );
    this.startAutomationUseCase = new StartAutomationSessionUseCase(
      this.automationEngine,
      this.browserAutomation,
      this.sessionRepository
    );
    
    this.logger.info('DIContainer initialized', {
      automationMode: config.mode,
      sessionRepositoryType: 'InMemorySessionRepository',
      browserAutomationType: this.getBrowserAutomationType(config.mode)
    });
  }
  
  private getBrowserAutomationType(mode: AutomationMode): string {
    switch (mode) {
      case 'dev': return 'BrowserDevToolsAdapter';
      case 'production': return 'NutJsAutomationAdapter';
      default: return 'MockBrowserAutomationAdapter';
    }
  }

  public static getInstance(): DIContainer {
    if (!DIContainer.instance) {
      DIContainer.instance = new DIContainer();
    }
    return DIContainer.instance;
  }

  public getStartAutomationUseCase(): StartAutomationSessionUseCase {
    return this.startAutomationUseCase;
  }

  public getSessionRepository(): ISessionRepository {
    return this.sessionRepository;
  }

  public getAutomationEngine(): IAutomationEngine {
    return this.automationEngine;
  }

  public getAutomationMode(): AutomationMode {
    return this.automationMode;
  }

  public getBrowserAutomation(): IBrowserAutomation {
    return this.browserAutomation;
  }

  public getLogger(): ILogger {
    return this.logger;
  }

  /**
   * Initialize browser connection for dev mode.
   * In dev mode, connects to the browser via Chrome DevTools Protocol.
   * In mock mode, returns success immediately (no connection needed).
   */
  public async initializeBrowserConnection(): Promise<BrowserConnectionResult> {
    this.logger.info('Initializing browser connection', { mode: this.automationMode });
    
    if (this.automationMode === 'dev') {
      try {
        const devToolsAdapter = this.browserAutomation as BrowserDevToolsAdapter;
        await devToolsAdapter.connect();
        this.logger.info('Browser connection established', { mode: 'dev', adapter: 'BrowserDevTools' });
        return { success: true };
      } catch (error) {
        const errorMsg = error instanceof Error ? error.message : 'Failed to connect to browser';
        this.logger.error('Browser connection failed', error instanceof Error ? error : new Error(errorMsg), { mode: 'dev' });
        return {
          success: false,
          error: errorMsg
        };
      }
    }
    if (this.automationMode === 'production') {
      try {
        const nutJsAdapter = this.browserAutomation as NutJsAutomationAdapter;
        const result = await nutJsAdapter.connect();
        if (!result.success) {
          this.logger.error('Browser connection failed', new Error(result.error || 'Unknown error'), { mode: 'production' });
          return { success: false, error: result.error };
        }
        this.logger.info('Browser connection established', { mode: 'production', adapter: 'NutJs' });
        return { success: true };
      } catch (error) {
        const errorMsg = error instanceof Error ? error.message : 'Failed to initialize nut.js';
        this.logger.error('Browser connection failed', error instanceof Error ? error : new Error(errorMsg), { mode: 'production' });
        return {
          success: false,
          error: errorMsg
        };
      }
    }
    this.logger.debug('Mock mode - no browser connection needed');
    return { success: true }; // Mock mode doesn't need connection
  }

  /**
   * Reset the singleton instance (useful for testing with different configurations).
   */
  public static resetInstance(): void {
    DIContainer.instance = undefined as unknown as DIContainer;
  }
}