import * as plugins from './plugins.js';
import * as paths from '../paths.js';

export class AssetsHandler {
  public defaultFromDirPath: string = plugins.path.join(paths.cwd, './assets');
  public defaultToDirPath: string = plugins.path.join(
    paths.cwd,
    './dist_serve/assets',
  );

  public async ensureAssetsDir() {
    const dirExists = await plugins.fs
      .directory(this.defaultFromDirPath)
      .exists();
    if (!dirExists) {
      await plugins.fs.directory(this.defaultFromDirPath).create();
      console.log(`created assets directory at ${this.defaultFromDirPath}`);
    }
  }

  // copies the assets directory recursively
  private async copyDirectoryRecursive(from: string, to: string) {
    const entries = await plugins.fs.directory(from).recursive().list();
    await plugins.fs.directory(to).create();

    for (const entry of entries) {
      const fromPath = plugins.path.join(from, entry.path);
      const toPath = plugins.path.join(to, entry.path);

      if (entry.isDirectory) {
        await plugins.fs.directory(toPath).create();
      } else {
        const toDir = plugins.path.dirname(toPath);
        await plugins.fs.directory(toDir).create();
        await plugins.fs.file(fromPath).copy(toPath);
      }
    }
  }

  // copies the html
  public async processAssets(optionsArg?: { from?: string; to?: string }) {
    // lets assemble the options
    optionsArg = {
      ...{
        from: this.defaultFromDirPath,
        to: this.defaultToDirPath,
      },
      ...(optionsArg || {}),
    };
    await this.ensureAssetsDir();
    optionsArg.from = plugins.smartpath.transform.toAbsolute(
      optionsArg.from,
      paths.cwd,
    ) as string;
    optionsArg.to = plugins.smartpath.transform.toAbsolute(
      optionsArg.to,
      paths.cwd,
    ) as string;

    // lets clean the target directory
    const toExists = await plugins.fs.directory(optionsArg.to).exists();
    if (toExists) {
      await plugins.fs.directory(optionsArg.to).delete();
    }

    await this.copyDirectoryRecursive(optionsArg.from, optionsArg.to);
  }
}