import { Logger } from '../utils/logger';
import * as fs from 'fs/promises';
import * as path from 'path';

/**
 * @interface DocGeneratorConfig
 * @description Configuration for the Documentation Generator.
 */
export interface DocGeneratorConfig {
  outputDir: string;
  sourceDirs: { user: string; developer: string; operations: string; };
  // Add configuration for templates, tools (JSDoc, Sphinx), etc.
}

/**
 * @interface DocGeneratorOperations
 * @description Defines operations for generating comprehensive documentation.
 */
export interface DocGeneratorOperations {
  generateAllDocumentation(): Promise<void>;
  generateUserDocumentation(): Promise<void>;
  generateDeveloperDocumentation(): Promise<void>;
  generateOperationsDocumentation(): Promise<void>;
}

/**
 * @class DocumentationGenerator
 * @description Orchestrates the generation of comprehensive documentation for users, developers, and operations.
 */
export class DocumentationGenerator implements DocGeneratorOperations {
  private config: DocGeneratorConfig;
  private logger: Logger;

  constructor(config: DocGeneratorConfig) {
    this.config = config;
    this.logger = new Logger('DocumentationGenerator');
    this.logger.info('Documentation Generator initialized.');
  }

  /**
   * Generates all types of documentation (user, developer, operations).
   * @returns {Promise<void>}
   */
  public async generateAllDocumentation(): Promise<void> {
    this.logger.info('Generating all documentation...');
    await fs.mkdir(this.config.outputDir, { recursive: true });
    await this.generateUserDocumentation();
    await this.generateDeveloperDocumentation();
    await this.generateOperationsDocumentation();
    this.logger.info(`All documentation generated to: ${this.config.outputDir}`);
  }

  /**
   * Generates user documentation.
   * @returns {Promise<void>}
   */
  public async generateUserDocumentation(): Promise<void> {
    this.logger.info('Generating user documentation (conceptual)...');
    // This would involve processing markdown files, API references, etc.
    // Example: Copying markdown files from source to output
    const sourcePath = this.config.sourceDirs.user;
    const outputPath = path.join(this.config.outputDir, 'user');
    await fs.mkdir(outputPath, { recursive: true });
    // Simulate file copy
    await new Promise(resolve => setTimeout(resolve, 300));
    this.logger.debug(`User documentation generated to ${outputPath}.`);
  }

  /**
   * Generates developer documentation.
   * @returns {Promise<void>}
   */
  public async generateDeveloperDocumentation(): Promise<void> {
    this.logger.info('Generating developer documentation (conceptual)...');
    // This would involve running JSDoc, Sphinx, or similar tools.
    const sourcePath = this.config.sourceDirs.developer;
    const outputPath = path.join(this.config.outputDir, 'developer');
    await fs.mkdir(outputPath, { recursive: true });
    // Simulate file copy
    await new Promise(resolve => setTimeout(resolve, 500));
    this.logger.debug(`Developer documentation generated to ${outputPath}.`);
  }

  /**
   * Generates operations documentation.
   * @returns {Promise<void>}
   */
  public async generateOperationsDocumentation(): Promise<void> {
    this.logger.info('Generating operations documentation (conceptual)...');
    // This would involve processing deployment guides, runbooks, etc.
    const sourcePath = this.config.sourceDirs.operations;
    const outputPath = path.join(this.config.outputDir, 'operations');
    await fs.mkdir(outputPath, { recursive: true });
    // Simulate file copy
    await new Promise(resolve => setTimeout(resolve, 400));
    this.logger.debug(`Operations documentation generated to ${outputPath}.`);
  }
}