/*---------------------------------------------------------------------------------------------
 *  Copyright (c) Microsoft Corporation. All rights reserved.
 *  Licensed under the MIT License. See License.txt in the project root for license information.
 *--------------------------------------------------------------------------------------------*/

import { ICodeEditor } from '../../../../vs/editor/browser/editorBrowser';
import {
  TextEdit,
  WorkspaceEdit,
  WorkspaceEditMetadata,
  WorkspaceFileEdit,
  WorkspaceFileEditOptions,
  WorkspaceTextEdit,
} from '../../../../vs/editor/common/modes';
import { createDecorator } from '../../../../vs/platform/instantiation/common/instantiation';
import { URI } from '../../../../vs/base/common/uri';
import { isObject } from '../../../../vs/base/common/types';

export const IBulkEditService = createDecorator<IBulkEditService>(
  'IWorkspaceEditService'
);

function isWorkspaceFileEdit(thing: any): thing is WorkspaceFileEdit {
  return (
    isObject(thing) &&
    (Boolean((<WorkspaceFileEdit>thing).newUri) ||
      Boolean((<WorkspaceFileEdit>thing).oldUri))
  );
}

function isWorkspaceTextEdit(thing: any): thing is WorkspaceTextEdit {
  return (
    isObject(thing) &&
    URI.isUri((<WorkspaceTextEdit>thing).resource) &&
    isObject((<WorkspaceTextEdit>thing).edit)
  );
}

export class ResourceEdit {
  protected constructor(readonly metadata?: WorkspaceEditMetadata) {}

  static convert(edit: WorkspaceEdit): ResourceEdit[] {
    return edit.edits.map((edit) => {
      if (isWorkspaceTextEdit(edit)) {
        return new ResourceTextEdit(
          edit.resource,
          edit.edit,
          edit.modelVersionId,
          edit.metadata
        );
      }
      if (isWorkspaceFileEdit(edit)) {
        return new ResourceFileEdit(
          edit.oldUri,
          edit.newUri,
          edit.options,
          edit.metadata
        );
      }
      throw new Error('Unsupported edit');
    });
  }
}

export class ResourceTextEdit extends ResourceEdit {
  constructor(
    readonly resource: URI,
    readonly textEdit: TextEdit,
    readonly versionId?: number,
    metadata?: WorkspaceEditMetadata
  ) {
    super(metadata);
  }
}

export class ResourceFileEdit extends ResourceEdit {
  constructor(
    readonly oldResource: URI | undefined,
    readonly newResource: URI | undefined,
    readonly options?: WorkspaceFileEditOptions,
    metadata?: WorkspaceEditMetadata
  ) {
    super(metadata);
  }
}

export interface IBulkEditOptions {
  editor?: ICodeEditor;
  showPreview?: boolean;
  label?: string;
  quotableLabel?: string;
}

export interface IBulkEditResult {
  ariaSummary: string;
}

export interface IBulkEditService {
  readonly _serviceBrand: undefined;

  hasPreviewHandler(): boolean;

  apply(
    edit: ResourceEdit[],
    options?: IBulkEditOptions
  ): Promise<IBulkEditResult>;
}