import { Injectable, Logger } from '@nestjs/common';
import { readFileSync } from 'fs';
import { join } from 'path';

@Injectable()
export class SqlLoaderService {
  private readonly logger = new Logger(SqlLoaderService.name);
  private readonly sqlRootPath = join(__dirname, '../sql/queries');

  loadQuery(module: string, queryName: string, path: string): string {
    const filePath = join(process.cwd(), path, module, `${queryName}.sql`);
    try {
      return readFileSync(filePath, 'utf8');
    } catch (error) {
      this.logger.error(
        `Failed to load SQL query: ${module}/${queryName}`,
        error.stack,
      );
      throw new Error(`SQL query not found: ${module}/${queryName}`);
    }
  }
}