import type { Faker } from '../../faker';

/**
 * Module to generate commerce and product related entries.
 */
export class CommerceModule {
  constructor(private readonly faker: Faker) {
    // Bind `this` so namespaced is working correctly
    for (const name of Object.getOwnPropertyNames(CommerceModule.prototype)) {
      if (name === 'constructor' || typeof this[name] !== 'function') {
        continue;
      }
      this[name] = this[name].bind(this);
    }
  }

  /**
   * Returns a department inside a shop.
   *
   * @example
   * faker.commerce.department() // 'Garden'
   *
   * @since 3.0.0
   */
  department(): string {
    return this.faker.helpers.arrayElement(
      this.faker.definitions.commerce.department
    );
  }

  /**
   * Generates a random descriptive product name.
   *
   * @example
   * faker.commerce.productName() // 'Incredible Soft Gloves'
   *
   * @since 3.0.0
   */
  productName(): string {
    return `${this.productAdjective()} ${this.productMaterial()} ${this.product()}`;
  }

  /**
   * Generates a price between min and max (inclusive).
   *
   * @param min The minimum price. Defaults to `1`.
   * @param max The maximum price. Defaults to `1000`.
   * @param dec The number of decimal places. Defaults to `2`.
   * @param symbol The currency value to use. Defaults to `''`.
   *
   * @example
   * faker.commerce.price() // 828.00
   * faker.commerce.price(100) // 904.00
   * faker.commerce.price(100, 200) // 154.00
   * faker.commerce.price(100, 200, 0) // 133
   * faker.commerce.price(100, 200, 0, '$') // $114
   *
   * @since 3.0.0
   */
  price(
    min: number = 1,
    max: number = 1000,
    dec: number = 2,
    symbol: string = ''
  ): string {
    if (min < 0 || max < 0) {
      return `${symbol}${0.0}`;
    }

    // TODO @Shinigami92 2022-11-24: https://github.com/faker-js/faker/issues/350
    const randValue = this.faker.number.int({ min, max });

    return symbol + randValue.toFixed(dec);
  }

  /**
   * Returns an adjective describing a product.
   *
   * @example
   * faker.commerce.productAdjective() // 'Handcrafted'
   *
   * @since 3.0.0
   */
  productAdjective(): string {
    return this.faker.helpers.arrayElement(
      this.faker.definitions.commerce.product_name.adjective
    );
  }

  /**
   * Returns a material of a product.
   *
   * @example
   * faker.commerce.productMaterial() // 'Rubber'
   *
   * @since 3.0.0
   */
  productMaterial(): string {
    return this.faker.helpers.arrayElement(
      this.faker.definitions.commerce.product_name.material
    );
  }

  /**
   * Returns a short product name.
   *
   * @example
   * faker.commerce.product() // 'Computer'
   *
   * @since 3.0.0
   */
  product(): string {
    return this.faker.helpers.arrayElement(
      this.faker.definitions.commerce.product_name.product
    );
  }

  /**
   * Returns a product description.
   *
   * @example
   * faker.commerce.productDescription() // 'Andy shoes are designed to keeping...'
   *
   * @since 5.0.0
   */
  productDescription(): string {
    return this.faker.helpers.arrayElement(
      this.faker.definitions.commerce.product_description
    );
  }
}