import URI from '@theia/core/lib/common/uri';

export const SketchesServicePath = '/services/sketches-service';
export const SketchesService = Symbol('SketchesService');
export interface SketchesService {
  /**
   * Resolves to a sketch container representing the hierarchical structure of the sketches.
   * If `uri` is not given, `directories.user` will be user instead. Specify `exclude` global patterns to filter folders from the sketch container.
   * If `exclude` is not set `['**\/libraries\/**', '**\/hardware\/**']` will be used instead.
   */
  getSketches({
    uri,
    exclude,
  }: {
    uri?: string;
    exclude?: string[];
  }): Promise<SketchContainer>;

  /**
   * This is the TS implementation of `SketchLoad` from the CLI and should be replaced with a gRPC call eventually.
   * See: https://github.com/arduino/arduino-cli/issues/837
   * Based on: https://github.com/arduino/arduino-cli/blob/eef3705c4afcba4317ec38b803d9ffce5dd59a28/arduino/builder/sketch.go#L100-L215
   */
  loadSketch(uri: string): Promise<Sketch>;

  /**
   * Unlike `loadSketch`, this method gracefully resolves to `undefined` instead or rejecting if the `uri` is not a sketch folder.
   */
  maybeLoadSketch(uri: string): Promise<Sketch | undefined>;

  /**
   * Creates a new sketch folder in the temp location.
   */
  createNewSketch(): Promise<Sketch>;

  /**
   * Creates a new sketch with existing content. Rejects if `uri` is not pointing to a valid sketch folder.
   */
  cloneExample(uri: string): Promise<Sketch>;

  isSketchFolder(uri: string): Promise<boolean>;

  /**
   * Sketches are created to the temp location by default and will be moved under `directories.user` on save.
   * This method resolves to `true` if the `sketch` is still in the temp location. Otherwise, `false`.
   */
  isTemp(sketch: Sketch): Promise<boolean>;

  /**
   * If `isTemp` is `true` for the `sketch`, you can call this method to move the sketch from the temp
   * location to `directories.user`. Resolves with the URI of the sketch after the move. Rejects, when the sketch
   * was not in the temp folder. This method always overrides. It's the callers responsibility to ask the user whether
   * the files at the destination can be overwritten or not.
   */
  copy(sketch: Sketch, options: { destinationUri: string }): Promise<string>;

  /**
   * Returns with the container sketch for the input `uri`. If the `uri` is not in a sketch folder, resolved `undefined`.
   */
  getSketchFolder(uri: string): Promise<Sketch | undefined>;

  /**
   * Marks the sketch with the given URI as recently opened. It does nothing if the sketch is temp or not valid.
   */
  markAsRecentlyOpened(uri: string): Promise<void>;

  /**
   * Resolves to an array of sketches in inverse chronological order. The newest is the first.
   */
  recentlyOpenedSketches(): Promise<Sketch[]>;

  /**
   * Archives the sketch, resolves to the archive URI.
   */
  archive(sketch: Sketch, destinationUri: string): Promise<string>;

  /**
   * Counterpart of the CLI's `genBuildPath` functionality.
   * Based on https://github.com/arduino/arduino-cli/blob/550179eefd2d2bca299d50a4af9e9bfcfebec649/arduino/builder/builder.go#L30-L38
   */
  getIdeTempFolderUri(sketch: Sketch): Promise<string>;
}

export interface Sketch {
  readonly name: string;
  readonly uri: string; // `LocationPath`
  readonly mainFileUri: string; // `MainFile`
  readonly otherSketchFileUris: string[]; // `OtherSketchFiles`
  readonly additionalFileUris: string[]; // `AdditionalFiles`
  readonly rootFolderFileUris: string[]; // `RootFolderFiles` (does not include the main sketch file)
}
export namespace Sketch {
  export function is(arg: any): arg is Sketch {
    return (
      !!arg &&
      'name' in arg &&
      'uri' in arg &&
      typeof arg.name === 'string' &&
      typeof arg.uri === 'string'
    );
  }
  export namespace Extensions {
    export const MAIN = ['.ino', '.pde'];
    export const SOURCE = ['.c', '.cpp', '.s'];
    export const ADDITIONAL = [
      '.h',
      '.c',
      '.hpp',
      '.hh',
      '.cpp',
      '.S',
      '.json',
      '.md',
      '.adoc',
    ];
    export const ALL = Array.from(new Set([...MAIN, ...SOURCE, ...ADDITIONAL]));
  }
  export function isInSketch(uri: string | URI, sketch: Sketch): boolean {
    const { mainFileUri, otherSketchFileUris, additionalFileUris } = sketch;
    return (
      [mainFileUri, ...otherSketchFileUris, ...additionalFileUris].indexOf(
        uri.toString()
      ) !== -1
    );
  }
  export function isSketchFile(arg: string | URI): boolean {
    if (arg instanceof URI) {
      return isSketchFile(arg.toString());
    }
    return Extensions.MAIN.some((ext) => arg.endsWith(ext));
  }
}

export interface SketchContainer {
  readonly label: string;
  readonly children: SketchContainer[];
  readonly sketches: Sketch[];
}
export namespace SketchContainer {
  export function is(arg: any): arg is SketchContainer {
    return (
      !!arg &&
      'label' in arg &&
      typeof arg.label === 'string' &&
      'children' in arg &&
      Array.isArray(arg.children) &&
      'sketches' in arg &&
      Array.isArray(arg.sketches)
    );
  }

  /**
   * `false` if the `container` recursively contains at least one sketch. Otherwise, `true`.
   */
  export function isEmpty(container: SketchContainer): boolean {
    const hasSketch = (parent: SketchContainer) => {
      if (
        parent.sketches.length ||
        parent.children.some((child) => hasSketch(child))
      ) {
        return true;
      }
      return false;
    };
    return !hasSketch(container);
  }

  export function prune<T extends SketchContainer>(container: T): T {
    for (let i = container.children.length - 1; i >= 0; i--) {
      if (isEmpty(container.children[i])) {
        container.children.splice(i, 1);
      }
    }
    return container;
  }

  export function toArray(container: SketchContainer): Sketch[] {
    const visit = (parent: SketchContainer, toPushSketch: Sketch[]) => {
      toPushSketch.push(...parent.sketches);
      parent.children.map((child) => visit(child, toPushSketch));
    };
    const sketches: Sketch[] = [];
    visit(container, sketches);
    return sketches;
  }
}