/**
 * Copyright (c) Facebook, Inc. and its affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * @flow strict
 * @format
 */

'use strict';

import type {
  FunctionTypeAnnotationParamTypeAnnotation,
  FunctionTypeAnnotationReturn,
  NativeModuleShape,
  TypeAliasTypeAnnotation,
  ObjectTypeAliasTypeShape,
  SchemaType,
} from '../../CodegenSchema';

type FilesOutput = Map<string, string>;

const moduleTemplate = `/**
 * Copyright (c) Facebook, Inc. and its affiliates.
 *
 * This source code is licensed under the MIT license found in the LICENSE file in the root
 * directory of this source tree.
 *
 * ${'@'}generated by codegen project: GenerateModuleJavaSpec.js
 *
 * @nolint
 */

package ::_PACKAGENAME_::;

::_IMPORTS_::

public abstract class ::_CLASSNAME_:: extends ReactContextBaseJavaModule implements ReactModuleWithSpec, TurboModule {
  public ::_CLASSNAME_::(ReactApplicationContext reactContext) {
    super(reactContext);
  }

::_METHODS_::
}
`;

function getImportList(nativeModule: NativeModuleShape): Set<string> {
  const imports: Set<string> = new Set();

  // Always required.
  imports.add('com.facebook.react.bridge.ReactApplicationContext');
  imports.add('com.facebook.react.bridge.ReactContextBaseJavaModule');
  imports.add('com.facebook.react.bridge.ReactMethod');
  imports.add('com.facebook.react.bridge.ReactModuleWithSpec');
  imports.add('com.facebook.react.turbomodule.core.interfaces.TurboModule');

  return imports;
}

// TODO: complete this implementation
module.exports = {
  generate(
    libraryName: string,
    schema: SchemaType,
    moduleSpecName: string,
  ): FilesOutput {
    const files = new Map();
    // TODO: Allow package configuration.
    const packageName = 'com.facebook.fbreact.specs';
    const nativeModules = Object.keys(schema.modules)
      .map(moduleName => {
        const modules = schema.modules[moduleName].nativeModules;
        if (modules == null) {
          return null;
        }

        return modules;
      })
      .filter(Boolean)
      .reduce((acc, components) => Object.assign(acc, components), {});

    Object.keys(nativeModules).forEach(name => {
      const {aliases, properties} = nativeModules[name];
      const className = `Native${name}Spec`;

      const methods = properties.map(method => {
        const traversedArgs = method.typeAnnotation.params.map(param => {});
      });

      files.set(
        `${className}.java`,
        moduleTemplate
          .replace(/::_PACKAGENAME_::/g, packageName)
          .replace(/::_CLASSNAME_::/g, className),
      );
    });

    return files;
  },
};