import { spawn } from 'child_process';
import type { WorktreeInfo, Config } from '../types/index.js';

    export interface GroveAppOptions {
  worktree: WorktreeInfo;
  config: Config;
}

export class GroveApp {
  private worktree: WorktreeInfo;
  private config: Config;

  constructor(options: GroveAppOptions) {
    this.worktree = options.worktree;
    this.config = options.config;
  }

  public async start(): Promise<void> {
    const relativePath = this.worktree.path.replace(process.cwd().replace(`/${this.worktree.name}`, ''), '..');
    console.log(`Grove is starting Claude in ${relativePath} with the branch ${this.worktree.branch}. Tip: When you're done with this worktree run: git worktree remove ${this.worktree.path}\n`);

    // Change to worktree directory
    process.chdir(this.worktree.path);

    if (this.config.autoStart.claudeCode) {
      // Launch Claude Code directly
      const claude = spawn('claude', [], {
        stdio: 'inherit', // Pass through stdin/stdout/stderr
        cwd: this.worktree.path,
        env: process.env
      });

      return new Promise((resolve, reject) => {
        claude.on('close', (code) => {
          this.cleanup();
          if (code === 0) {
            resolve();
          } else {
            reject(new Error(`Claude Code exited with code ${code}`));
          }
        });

        claude.on('error', (error) => {
          this.cleanup();
          reject(error);
        });

        // Handle Ctrl+C to cleanup properly
        process.on('SIGINT', () => {
          claude.kill('SIGINT');
        });
      });
    } else {
      // Just show instructions and wait for user to exit
      console.log(`📂 Working directory: ${this.worktree.path}`);
      console.log(`🔧 Run 'claude' to start Claude Code when ready`);
      
      return new Promise((resolve) => {
        process.on('SIGINT', () => {
          this.cleanup();
          resolve();
        });
      });
    }
  }

  private cleanup(): void {
    // Change back to original directory
    const originalDir = process.env['INIT_CWD'] ?? process.cwd().replace(`/${this.worktree.name}`, '');
    process.chdir(originalDir);
  }
}