// Validates passwords to make sure they are powerful
(function () {
  var CLEAR = 0;
  var WEAK = 1;
  var STRONG = 3;
  var SHORT = 4;
  var MATCH_IRCKEY = 5;
  var MATCH_USERNAME = 6;
  var COMMON = 7;
  var USER_PATH = "/user.php";

  $(document).ready(function () {
    var old = $("#new_pass_1").val().length;
    var password1;
    var password2;

    $("#new_pass_1").keyup(function () {
      password1 = $("#new_pass_1").val();
      if (password1.length != old) {
        disableSubmit();
        calculateComplexity(password1);
        old = password1.length;
      }
    });

    $("#new_pass_1").change(function () {
      password1 = $("#new_pass_1").val();
      password2 = $("#new_pass_2").val();

      if (password1.length == 0 && password2.length == 0) {
        enableSubmit();
      }
    });

    $("#new_pass_1").focus(function () {
      password1 = $("#new_pass_1").val();
      password2 = $("#new_pass_2").val();

      if (password1.length > 0) {
        checkMatching(password1, password2);
      }
    });

    $("#new_pass_2").keyup(function () {
      password2 = $("#new_pass_2").val();
      checkMatching(password1, password2);
    });

    $("#new_pass_1").blur(function () {
      password1 = $("#new_pass_1").val();
      password2 = $("#new_pass_2").val();

      if (password1.length == 0 && password2.length == 0) {
        enableSubmit();
      }
    });

  });


  /**
   * calculateComplexity
   */
  function calculateComplexity(password) {
    var length = password.length;
    var username;

    if (isUserPage()) {
      username = $(".username").text();
    } else {
      username = $("#username").val() || '';
    }

    var irckey;
    if (isUserPage()) {
      irckey = $("#irckey").val();
    }

    if (length >= 15) {
      setStatus(WEAK);
    }

    if (length >= 15 && isStrongPassword(password)) {
      setStatus(STRONG);
    }

    if (length > 0 && length < 15) {
      setStatus(SHORT);
    }

    if (length == 0) {
      setStatus(CLEAR);
    }

    if (isUserPage()) {
      if (irckey.length > 0) {
        if (password.toLowerCase() == irckey.toLowerCase()) {
          setStatus(MATCH_IRCKEY);
        }
      }
    }

    if (username.length > 0) {
      if (password.toLowerCase() == username.toLowerCase()) {
        setStatus(MATCH_USERNAME);
      }
    }
  }


  /**
   * isStrongPassword
   * 
   * $ENV-PW_MIN is still harcoded here.
   */
  function isStrongPassword(password) {
    return /(?=^.{15,}$).*$/.test(password);
  }


  /**
   * checkMatching
   */
  function checkMatching(password1, password2) {
    if (password2.length > 0) {
      if (password1 == password2 && getStrong() == true) {
        $("#pass_match").text("Passwords match").css("color", "green");
        enableSubmit();
      } else if (getStrong() == true) {
        $("#pass_match").text("Passwords do not match").css("color", "red");
        disableSubmit();
      } else {
        $("#pass_match").text("Password isn't strong").css("color", "red");
        disableSubmit();
      }
    } else {
      $("#pass_match").text("");
    }
  }


  /**
   * getStrong
   */
  function getStrong() {
    return $("#pass_strength").text() == "Strong";
  }


  /**
   * setStatus
   */
  function setStatus(strength) {
    if (strength == WEAK) {
      disableSubmit();
      $("#pass_strength").text("Weak").css("color", "red");
    }

    if (strength == STRONG) {
      disableSubmit();
      $("#pass_strength").text("Strong").css("color", "green");
    }

    if (strength == SHORT) {
      disableSubmit();
      $("#pass_strength").text("Too Short").css("color", "red");
    }

    if (strength == MATCH_IRCKEY) {
      disableSubmit();
      $("#pass_strength").text("Password cannot match IRC Key").css("color", "red");
    }

    if (strength == MATCH_USERNAME) {
      disableSubmit();
      $("#pass_strength").text("Password cannot match Username").css("color", "red");
    }

    if (strength == COMMON) {
      disableSubmit();
      $("#pass_strength").text("Password is too common").css("color", "red");
    }

    if (strength == CLEAR) {
      $("#pass_strength").text("");
    }
  }


  /**
   * disableSubmit
   */
  function disableSubmit() {
    $('input[type="submit"]').attr('disabled', 'disabled');
  }


  /**
   * enableSubmit
   */
  function enableSubmit() {
    $('input[type="submit"]').removeAttr('disabled');
  }


  /**
   * isUserPage
   */
  function isUserPage() {
    return window.location.pathname.indexOf(USER_PATH) != -1;
  }

})();