//16进制（数值+字母）
function random1(len) {
  var pwd = "";
  for (var idx = 0; idx < len; idx++) {
    pwd = pwd + ((Math.random() * 16) & (0x5 | 0x9)).toString(16);
  }
  return pwd;
}

function random2(formation, len) {
  //ASCII 33 ~ 126
  // 33-47，58-64，91-96，123-126 特殊符号
  // 48-57 数字
  // 65-90 大写字母
  // 97-122 小写字母
  let pwd = "",
    f_i = 0;
  for (let i = 0; i < len; i++) {
    for (;; f_i++) {
      let _i = f_i % 4;
      if (formation[_i] == 1) {
        switch (_i) {
          case 0: // 大写字母
            pwd = pwd + String.fromCharCode(parseInt(Math.random() * 26 + 65));
            break;
          case 1: // 小写字母
            pwd = pwd + String.fromCharCode(parseInt(Math.random() * 26 + 97));
            break;
          case 2: // 特殊符号
            pwd = pwd + String.fromCharCode(parseInt(Math.random() * 15 + 33));
            break;
          case 3: // 数字
            pwd = pwd + String.fromCharCode(parseInt(Math.random() * 10 + 48));
            break;
        }
        f_i++;
        break;
      }
    }
  }
  console.log(pwd);
}
//纯数字
function random3(len) {
  var pwd = "";
  for (var idx = 0; idx < len; idx++) {
    var seed = parseInt(Math.random() * 9);
    pwd = pwd + seed;
  }
  return pwd;
}

function create() {
  var result = document.getElementById("result1");
  for (var i = 0; i < 10; i++) {
    result.innerText = result.innerText + random1(6) + "\n";
  }
  var result = document.getElementById("result2");
  for (var i = 0; i < 10; i++) {
    result.innerText = result.innerText + random2(6) + "\n";
  }
  var result = document.getElementById("result3");
  for (var i = 0; i < 10; i++) {
    result.innerText = result.innerText + random3(6) + "\n";
  }
}

function generatePassword(rules, minNum, maxNum) {
  var rulesArr = rules.split("");
  var rulesArrLnArr = [];
  var pwd = "";
  var numbers = "0123456789";
  var lower = "abcdefghijklmnopqrstuvwxyz";
  var upper = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
  var others = "~!@#$%^&*()_";

  function rand(min, max) {
    return Math.random() * (max - min) + min;
  }
  var pwdLen = parseInt(rand(minNum, maxNum)); //随机生成密码长度10-12位。
  // alert("密码长度：" + pwdLen);
  var item = new Array(pwdLen); //存放密码的类型 数字（1），小写（2），大写（3），特殊字符（4）
  for (let i = 0; i < rulesArr.length; i++) {
    if (rulesArr[i] == "1") {
      rulesArrLnArr.push(i + 1 + "");
    }
  }
  for (let i = 0; i < rulesArrLnArr.length; i++) {
    item[rulesArrLnArr[i]] = rulesArrLnArr[i] + "";
    console.log(`rulesArrLnArr[i]`, rulesArrLnArr[i]);
  }
  for (i = 0; i < pwdLen; i++) {
    if (rulesArrLnArr.indexOf(i + "") == -1) {
      item[i] = "";
      item[i] +=
        rulesArrLnArr[
          parseInt(Math.random() * (rulesArrLnArr.length - 0) + 0)
        ]; //其余部分随机生成1-4的数字。
    }
  }
  //打乱次序，重新排序，否则密码第四位永远是特殊符号。
  item.sort(function () {
    return 0.5 - Math.random();
  }); //返回0 两个数位置不变；小于0 就交换位置；大于0就不交换位置

  for (j = 0; j < pwdLen; j++) {
    if (item[j] == "4") {
      pwd += numbers.charAt(Math.random() * (numbers.length - 1) + 1);
    } else if (item[j] == "1") {
      pwd += lower.charAt(Math.random() * (lower.length - 1) + 1);
    } else if (item[j] == "2") {
      pwd += upper.charAt(Math.random() * (upper.length - 1) + 1);
    } else if (item[j] == "3") {
      pwd += others.charAt(Math.random() * (others.length - 1) + 1);
    }
  }
  return pwd;
}