import { URI } from '../../../../vs/base/common/uri';
import { IPosition } from '../../../../vs/editor/common/core/position';
import { createDecorator } from '../../../../vs/platform/instantiation/common/instantiation';

export const ITextResourceConfigurationService =
  createDecorator<ITextResourceConfigurationService>(
    'textResourceConfigurationService'
  );

export interface ITextResourceConfigurationChangeEvent {
  /**
   * All affected keys. Also includes language overrides and keys changed under language overrides.
   */
  readonly affectedKeys: string[];

  /**
   * Returns `true` if the given section has changed for the given resource.
   *
   * Example: To check if the configuration section has changed for a given resource use `e.affectsConfiguration(resource, section)`.
   *
   * @param resource Resource for which the configuration has to be checked.
   * @param section Section of the configuration
   */
  affectsConfiguration(resource: URI, section: string): boolean;
}

export interface ITextResourceConfigurationService {
  readonly _serviceBrand: undefined;

  /**
   * Fetches the value of the section for the given resource by applying language overrides.
   * Value can be of native type or an object keyed off the section name.
   *
   * @param resource - Resource for which the configuration has to be fetched.
   * @param position - Position in the resource for which configuration has to be fetched.
   * @param section - Section of the configuraion.
   *
   */
  getValue<T>(resource: URI | undefined, section?: string): T;
  getValue<T>(
    resource: URI | undefined,
    position?: IPosition,
    section?: string
  ): T;
}

export const ITextResourcePropertiesService =
  createDecorator<ITextResourcePropertiesService>(
    'textResourcePropertiesService'
  );

export interface ITextResourcePropertiesService {
  readonly _serviceBrand: undefined;

  /**
   * Returns the End of Line characters for the given resource
   */
  getEOL(resource: URI, language?: string): string;
}