import debug from 'debug';
import validator from 'validator';

const log = debug('helper:form');

export class Form {
  constructor(validation) { this.validation = validation; }
  fill(object, check = true) {
    for (let element in this.validation) {
      this.validation[element].value = object[element];
      if (check) {
        this.validation[element].error = !this.isValid(element);
      }
    }

    return this.validation;
  } // end fill
  isValid(element) {
    if ("undefined" !== typeof element) { // check 1 element
      if ("function" === typeof this.validation[element].convert) { // convert
        this.validation[element].checkValue =
            this.validation[element].convert(this.validation[element].value);
        log("convert", element, this.validation[element].value, 'to',
            this.validation[element].checkValue);
      } else if ("string" === typeof this.validation[element.convert]) {
        log("convert", element, this.validation[element].value, 'to',
            this.validation[element].checkValue);
        this.validation[element].checkValue =
            validator[this.validation[element].convert](object[element]);
      } else {
        this.validation[element].checkValue = this.validation[element].value;
      }
      // validate
      log(typeof this.validation[element].validator,
          typeof validator[this.validation[element].validator],
          typeof this.validation[element].checkValue);

      if ("string" === typeof this.validation[element].validator &&
          "function" === typeof validator[this.validation[element].validator] &&
          "string" ===
              typeof this.validation[element]
                  .checkValue) { // validation function
        log("validat by validator string", element);
        return validator[this.validation[element].validator](
            this.validation[element].checkValue,
            this.validation[element].options);
      } else if ("function" === typeof this.validation[element].validator &&
                 "string" ===
                     typeof this.validation[element]
                         .checkValue) { // own validation function
        log("validat by validator function", element);
        return this.validation[element].validator(
            this.validation[element].checkValue);
      } else if (this.validation[element].required &&
                 ("undefined" === typeof this.validation[element].checkValue ||
                  "" ===
                      this.validation[element]
                          .checkValue)) { // validation but no value
        log("validat required but no value", element);
        return false;
      } else if ("undefined" === typeof this.validation[element].validator ||
                 !this.validation[element]
                      .required) { // no validation or not required
        log("validat no validator (true)", element);
        return true; // no validation, so valid
      } else {
        log("validat else (false)", element);
        return false;
      }

    } else { // check everything
      for (let e in this.validation) {
        if (!this.isValid(e)) {
          return false;
        }
      }
      return true;
    }
  } // end isValid
}

exports.default = Form;