import { Injectable } from '@angular/core';
import { Verify } from './verify';

@Injectable()
export class Validate {
  validates = {}

  constructor(public verify:Verify) {
    this.verify = verify;
  }

  /**
   * 验证待检查字段
   * @param values 待检测的值对象,如
   * {newPhone:18616016872,password:abc123,captcha:2345}
   * @param options 检测字段对象,如
   * {
       * 'newPhone':'phone',
       * 'password':'password',
       * 'captcha':['captcha':{isLowerletter:'请输入正确验证码'}]
       * }
   */
  check (values, options) {
    const finalResult = {passedAll:false};
    let isPassed = true;

    for (let name in options) {
      var validate = options[name];

      var result = this.checkOne(values[name], validate);
      isPassed = isPassed && result.passed;
      finalResult[name] = result;
    }

    finalResult.passedAll = isPassed;
    return finalResult;
  }

  /**
   * 验证单个待检查字段
   * @param value 待检测的值,如果为数组,则当成多个参数,统一用apply执行
   * @param validate 字符串如'phone'或数组如['captcha',{isLowerletter:'请输入正确验证码'}]
   * @param scope 将错误信息绑定的作用域,默认绑定如$scope.message.phone
   */
  checkOne(value, validate) {
    if(!validate) return null;
    var key = Array.isArray(validate) ? validate[0] : validate;
    // 检测参数为数组类型,方便传入多参数
    var args = Array.isArray(value) ? value : [value];

    var result = Array.isArray(validate)
      ? this.verify.check(validate[1]).apply(null, args)
      : (this.validates[validate]
      ? this.validates[validate].apply(null, args): null);

    // 存在作用域,则将结果信息进行绑定
    if(result) result.key = key;

    return result;
  }

  /**
   * 添加统一验证方法
   * @param options 大的配置对象,类似如下:
   * {
          mobileNo:[['require','手机号不能为空'], ['isPhone','请输入正确的手机号码']],
          captcha: {require: '验证码不能为空', isLowerletter:'验证码输入错误'}
       *  }
   */
  addValidates(options) {
    for (var key in options) {
      this.validates[key] = this.verify.check(options[key]);
    }
  }

}