import {
  formatFiles,
  GeneratorCallback,
  joinPathFragments,
  readProjectConfiguration,
  runTasksInSerial,
  Tree,
} from '@nx/devkit';
import { Linter, lintProjectGenerator } from '@nx/eslint';
import { addAngularEsLintDependencies } from './lib/add-angular-eslint-dependencies';
import type { AddLintingGeneratorSchema } from './schema';
import {
  findEslintFile,
  isEslintConfigSupported,
  replaceOverridesInLintConfig,
} from '@nx/eslint/src/generators/utils/eslint-file';
import { camelize, dasherize } from '@nx/devkit/src/utils/string-utils';

export async function addLintingGenerator(
  tree: Tree,
  options: AddLintingGeneratorSchema
): Promise<GeneratorCallback> {
  const tasks: GeneratorCallback[] = [];
  const rootProject = options.projectRoot === '.' || options.projectRoot === '';
  const lintTask = await lintProjectGenerator(tree, {
    linter: Linter.EsLint,
    project: options.projectName,
    tsConfigPaths: [
      joinPathFragments(options.projectRoot, 'tsconfig.app.json'),
    ],
    unitTestRunner: options.unitTestRunner,
    setParserOptionsProject: options.setParserOptionsProject,
    skipFormat: true,
    rootProject: rootProject,
  });
  tasks.push(lintTask);

  if (isEslintConfigSupported(tree)) {
    const eslintFile = findEslintFile(tree, options.projectRoot);
    // keep parser options if they exist
    const hasParserOptions = tree
      .read(joinPathFragments(options.projectRoot, eslintFile), 'utf8')
      .includes(`${options.projectRoot}/tsconfig.*?.json`);

    replaceOverridesInLintConfig(tree, options.projectRoot, [
      {
        files: ['*.ts'],
        ...(hasParserOptions
          ? {
              parserOptions: {
                project: [`${options.projectRoot}/tsconfig.*?.json`],
              },
            }
          : {}),
        extends: [
          'plugin:@nx/angular',
          'plugin:@angular-eslint/template/process-inline-templates',
        ],
        rules: {
          '@angular-eslint/directive-selector': [
            'error',
            {
              type: 'attribute',
              prefix: camelize(options.prefix),
              style: 'camelCase',
            },
          ],
          '@angular-eslint/component-selector': [
            'error',
            {
              type: 'element',
              prefix: dasherize(options.prefix),
              style: 'kebab-case',
            },
          ],
        },
      },
      {
        files: ['*.html'],
        extends: ['plugin:@nx/angular-template'],
        /**
         * Having an empty rules object present makes it more obvious to the user where they would
         * extend things from if they needed to
         */
        rules: {},
      },
      ...(isBuildableLibraryProject(tree, options.projectName)
        ? [
            {
              files: ['*.json'],
              parser: 'jsonc-eslint-parser',
              rules: {
                '@nx/dependency-checks': 'error',
              } as any,
            },
          ]
        : []),
    ]);
  }

  if (!options.skipPackageJson) {
    const installTask = addAngularEsLintDependencies(tree);
    tasks.push(installTask);
  }

  if (!options.skipFormat) {
    await formatFiles(tree);
  }

  return runTasksInSerial(...tasks);
}

function isBuildableLibraryProject(tree: Tree, projectName: string): boolean {
  const projectConfig = readProjectConfiguration(tree, projectName);
  return (
    projectConfig.projectType === 'library' &&
    projectConfig.targets?.build &&
    !!projectConfig.targets.build
  );
}

export default addLintingGenerator;