/**
 * Copyright (c) 2020-present, Goldman Sachs
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import { action, makeAutoObservable } from 'mobx';

enum ACTION_STATE {
  INITIAL = 'INITIAL',
  IN_PROGRESS = 'IN_PROGRESS',
  SUCCEEDED = 'SUCEEDED',
  FAILED = 'FAILED',
}

export class ActionState {
  state: ACTION_STATE;

  private constructor() {
    this.state = ACTION_STATE.INITIAL;
  }

  reset(): ActionState {
    this.state = ACTION_STATE.INITIAL;
    return this;
  }

  inProgress(): ActionState {
    this.state = ACTION_STATE.IN_PROGRESS;
    return this;
  }

  fail(): ActionState {
    this.state = ACTION_STATE.FAILED;
    return this;
  }

  pass(): ActionState {
    this.state = ACTION_STATE.SUCCEEDED;
    return this;
  }

  complete(hasSucceeded = true): ActionState {
    if (hasSucceeded) {
      this.pass();
    } else {
      this.fail();
    }
    return this;
  }

  get isInInitialState(): boolean {
    return this.state === ACTION_STATE.INITIAL;
  }

  get isInProgress(): boolean {
    return this.state === ACTION_STATE.IN_PROGRESS;
  }

  get hasFailed(): boolean {
    return this.state === ACTION_STATE.FAILED;
  }

  get hasSucceeded(): boolean {
    return this.state === ACTION_STATE.SUCCEEDED;
  }

  /**
   * Use this if only the completion state of the action is of concern,
   * i.e. we don't care if it fails or succeeds.
   */
  get hasCompleted(): boolean {
    return this.hasFailed || this.hasSucceeded;
  }

  static create(): ActionState {
    return makeAutoObservable(new ActionState(), {
      reset: action,
      inProgress: action,
      pass: action,
      fail: action,
      complete: action,
    });
  }
}