import * as AdmZip from 'adm-zip';
import chalk from 'chalk';
import * as child_process from 'child_process';
import * as fs from 'fs';
import * as glob from 'glob';
import * as path from 'path';

export class AppPackager {
  private rootPath: string;

  constructor(rootPath: string) {
    this.rootPath = path.resolve(rootPath);
  }

  public package() {
    console.log(chalk.gray(`Packaging files in ${this.rootPath}`));
    const files = glob.sync('**/*', {
      cwd: this.rootPath,
      dot: true,
      ignore: ['node_modules/**/*', '*.zip', '.git/**/*'],
      nodir: true
    }).filter(this.filterGitIgnored);

    return this.createZip(this.rootPath, files);
  }

  private createZip(srcPath: string, files: string[]): Buffer {
    const zip = new AdmZip();
    files.forEach((file) => {
      const filePath = path.join(srcPath, file);
      if (fs.existsSync(filePath)) {
        console.log(chalk.gray(`${file}`));
        zip.addFile(file, fs.readFileSync(filePath));
      }
    });

    return zip.toBuffer();
  }

  private filterGitIgnored = (file: string) => {
    return child_process.spawnSync(
      'git',
      ['check-ignore', '-q', file],
      {cwd: this.rootPath}
    ).status === 1;
  }
}