import joi from '@hapi/joi';

import IdValidate from './id';

export default class MaterialValidate {  // validate input for material
  private static material = {
    name: joi.string()
      .max(128),

    supplier: joi.string()
      .max(128),

    group: joi.string()
      .max(128),

    mineral: joi.number()
      .integer()
      .min(0)
      .max(100),

    glass_fiber: joi.number()
      .integer()
      .min(0)
      .max(100),

    carbon_fiber: joi.number()
      .integer()
      .min(0)
      .max(100),

    numbers: joi.array()
      .items(joi.object({
        color: joi.string()
          .max(128)
          .required(),
        number: joi.string()
          .max(128)
          .allow('')
          .required()
      }))
  };

  static input (data, param) {  // validate data, param: new(everything required)/change(available attributes are validated)
    if (param === 'new') {
      return joi.object({
        name: this.material.name.required(),
        supplier: this.material.supplier.required(),
        group: this.material.group.required(),
        mineral: this.material.mineral.required(),
        glass_fiber: this.material.glass_fiber.required(),
        carbon_fiber: this.material.carbon_fiber.required(),
        numbers: this.material.numbers.required()
      }).validate(data);
    }
    else if (param === 'change') {
      return joi.object({
        name: this.material.name,
        supplier: this.material.supplier,
        group: this.material.group,
        mineral: this.material.mineral,
        glass_fiber: this.material.glass_fiber,
        carbon_fiber: this.material.carbon_fiber,
        numbers: this.material.numbers
      }).validate(data);
    }
    else {
      return{error: 'No parameter specified!', value: {}};
    }
  }

  static output (data) {  // validate output from database for needed properties, strip everything else
    data = IdValidate.stringify(data);
    const {value, error} = joi.object({
      _id: IdValidate.get(),
      name: this.material.name,
      supplier: this.material.supplier,
      group: this.material.group,
      mineral: this.material.mineral,
      glass_fiber: this.material.glass_fiber,
      carbon_fiber: this.material.carbon_fiber,
      numbers: this.material.numbers
    }).validate(data, {stripUnknown: true});
    return error !== undefined? null : value;
  }
}