import type { Rule, SchematicContext, Tree } from '@angular-devkit/schematics';
import {
  apply,
  chain,
  MergeStrategy,
  mergeWith,
  move,
  template,
  url,
} from '@angular-devkit/schematics';
import { normalize } from '@angular-devkit/core';
import { PackageJsonUtils } from '../utils/package-json.utils';

interface Options {
  directory: string;
}

export function main(options: Options): Rule {
  return (_tree: Tree, context: SchematicContext) => {
    context.logger.info('Adding commitlint ...');
    const path = normalize(options.directory);
    const templateSource = apply(url(normalize('./files')), [
      template({}),
      move(path),
    ]);

    const merged = mergeWith(templateSource, MergeStrategy.Overwrite);

    return chain([merged, updatePackageJson(path)]);
  };
}

function updatePackageJson(directory: string): Rule {
  return (tree: Tree) => {
    const path = normalize(`${directory}/package.json`);
    const packageJsonUtils = new PackageJsonUtils(tree, path);
    packageJsonUtils.addPackage('@commitlint/cli', '^17.1.2', true);
    packageJsonUtils.addPackage(
      '@commitlint/config-conventional',
      '^17.1.0',
      true,
    );
    return tree;
  };
}