📦 juspay / workforge

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180import { spawnSync } from 'child_process';
import { existsSync, mkdirSync, readFileSync, writeFileSync, readdirSync, statSync } from 'fs';
import * as path from 'path';
import * as os from 'os';
import * as crypto from 'crypto';
import { ProjectMetadata } from '../types/index.js';

/**
 * Project Identifier
 *
 * Generates unique project IDs based on Git remote URL and manages project metadata
 */
export class ProjectIdentifier {
  /**
   * Generate unique project ID from git remote URL
   * Uses SHA-256 hash of origin URL (first 8 characters)
   *
   * @param repoRoot - Absolute path to repository root
   * @returns Project ID (8-character hex string)
   */
  static generateId(repoRoot: string): string {
    const remoteUrl = this.getRemoteUrl(repoRoot);

    const hash = crypto
      .createHash('sha256')
      .update(remoteUrl)
      .digest('hex')
      .substring(0, 8); // First 8 chars

    return hash;
  }

  /**
   * Get git remote origin URL
   *
   * @param repoRoot - Absolute path to repository root
   * @returns Remote origin URL
   */
  private static getRemoteUrl(repoRoot: string): string {
    const result = spawnSync('git', ['remote', 'get-url', 'origin'], {
      cwd: repoRoot,
      encoding: 'utf8',
      stdio: 'pipe'
    });

    if (result.status !== 0 || !result.stdout) {
      // Fallback to repo path if no remote
      return repoRoot;
    }

    return result.stdout.trim();
  }

  /**
   * Get project directory in ~/.workforge/projects/<project-id>
   *
   * @param repoRoot - Absolute path to repository root
   * @returns Absolute path to project directory
   */
  static getProjectDir(repoRoot: string): string {
    const id = this.generateId(repoRoot);
    return path.join(os.homedir(), '.workforge', 'projects', id);
  }

  /**
   * Get backup directory for project
   *
   * @param repoRoot - Absolute path to repository root
   * @returns Absolute path to backup directory
   */
  static getBackupDir(repoRoot: string): string {
    const id = this.generateId(repoRoot);
    return path.join(os.homedir(), '.workforge', 'backups', id);
  }

  /**
   * Create or update project metadata
   * Creates .meta.json file in project directory
   *
   * @param repoRoot - Absolute path to repository root
   */
  static updateMetadata(repoRoot: string): void {
    const projectDir = this.getProjectDir(repoRoot);
    mkdirSync(projectDir, { recursive: true });

    const metaPath = path.join(projectDir, '.meta.json');

    // Load existing metadata if present
    let existingMeta: Partial<ProjectMetadata> = {};
    if (existsSync(metaPath)) {
      try {
        existingMeta = JSON.parse(readFileSync(metaPath, 'utf8'));
      } catch {
        // Ignore parse errors, will create new metadata
      }
    }

    const meta: ProjectMetadata = {
      projectId: this.generateId(repoRoot),
      remoteUrl: this.getRemoteUrl(repoRoot),
      repoPath: repoRoot,
      repoName: path.basename(repoRoot),
      createdAt: existingMeta.createdAt || new Date().toISOString(),
      lastAccessed: new Date().toISOString()
    };

    writeFileSync(metaPath, JSON.stringify(meta, null, 2), 'utf8');
  }

  /**
   * Get project metadata
   *
   * @param repoRoot - Absolute path to repository root
   * @returns Project metadata or null if not found
   */
  static getMetadata(repoRoot: string): ProjectMetadata | null {
    const projectDir = this.getProjectDir(repoRoot);
    const metaPath = path.join(projectDir, '.meta.json');

    if (!existsSync(metaPath)) {
      return null;
    }

    try {
      return JSON.parse(readFileSync(metaPath, 'utf8'));
    } catch {
      return null;
    }
  }

  /**
   * Get all project directories
   *
   * @returns Array of project directory paths
   */
  static getAllProjectDirs(): string[] {
    const projectsRoot = path.join(os.homedir(), '.workforge', 'projects');

    if (!existsSync(projectsRoot)) {
      return [];
    }

    const entries = readdirSync(projectsRoot);

    return entries
      .map((entry: string) => path.join(projectsRoot, entry))
      .filter((entryPath: string) => {
        try {
          return statSync(entryPath).isDirectory();
        } catch {
          return false;
        }
      });
  }

  /**
   * Get all projects metadata
   *
   * @returns Array of project metadata
   */
  static getAllProjects(): ProjectMetadata[] {
    const projectDirs = this.getAllProjectDirs();
    const projects: ProjectMetadata[] = [];

    for (const dir of projectDirs) {
      const metaPath = path.join(dir, '.meta.json');
      if (existsSync(metaPath)) {
        try {
          const meta = JSON.parse(readFileSync(metaPath, 'utf8'));
          projects.push(meta);
        } catch {
          // Skip invalid metadata files
        }
      }
    }

    return projects;
  }
}