import fs from 'fs-extra';
import path from 'path';

export interface ApiKeyInfo {
  key: string;
  url?: string;
}

const SKIP_DIRS = new Set(['node_modules', '.git', 'dist', '.angular', 'coverage', '.cache']);

/**
 * Recursively searches for an `environment.ts` file starting from `dir`,
 * up to `maxDepth` directory levels deep.
 */
export function findEnvironmentFile(dir: string, maxDepth = 8, currentDepth = 0): string | null {
  if (currentDepth > maxDepth) return null;
  try {
    const entries = fs.readdirSync(dir, { withFileTypes: true });
    for (const entry of entries) {
      if (SKIP_DIRS.has(entry.name)) continue;
      const fullPath = path.join(dir, entry.name);
      if (entry.isFile() && entry.name === 'environment.ts') {
        return fullPath;
      }
      if (entry.isDirectory()) {
        const found = findEnvironmentFile(fullPath, maxDepth, currentDepth + 1);
        if (found) return found;
      }
    }
  } catch {
    //bypass errors
  }
  return null;
}

/**
 * Parses environment.ts content and returns all top-level keys that contain "api"
 * (case-insensitive), along with their `url` value if present.
 */
export function parseApiKeys(content: string): ApiKeyInfo[] {
  const result: ApiKeyInfo[] = [];
  const keyRegex = /^ {2}(\w*[Aa][Pp][Ii]\w*)\s*:/gm;
  let match: RegExpExecArray | null;

  while ((match = keyRegex.exec(content)) !== null) {
    const key = match[1];
    const afterKey = content.slice(match.index);
    const urlMatch = afterKey.match(/url:\s*['"`]([^'"`\n]+)['"`]/);
    result.push({ key, url: urlMatch?.[1] });
  }

  return result;
}