var subscribe_form = null;
var subscribe_form_message = null;
var subscribe_form_message_fx = null;
var subscribe_why_link = null;

function submitSubscribe(email){
  var req_url = "/blog/wp-content/plugins/subscribe/functions.php";

  var req = new Request({
    url: req_url,
    method: "post",
    data: "email="+email+"&ajax=1&subscribe=1",
    onSuccess: function(responseText) {
      if(responseText != "") {
        changeSubscribeMessage(responseText);
      }
      else {
        subscribe_form.email.value = subscribe_form.email.defaultValue;
        changeSubscribeMessage('Thankyou for your submission.');
      }
    },
    onFailure: function() {
      changeSubscribeMessage('An error occurred, please try again.');
    }
  }).send();
  changeSubscribeMessage('Processing...');
}

window.addEvent('domready', function() {
  subscribe_form = $('subscribe_form');
  subscribe_form_message = subscribe_form.getElement('#subscribe_message');
  subscribe_form_message_fx = new Fx.Tween(subscribe_form_message);
  if (subscribe_form) {
    subscribe_form.addEvent('submit', function(e) {
      e = new Event(e).stop();
      if (!checkEmail(subscribe_form.email.value)) {
        changeSubscribeMessage('Please enter a valid email address');
      }
      else {
        submitSubscribe(subscribe_form.email.value);
      }
    });
  }
  subscribe_why_link = $('subscribe_why_link');
  subscribe_why_box = $('subscribe_why');
  subscribe_why_close = $('subscribe_close');
  subscribe_why_link.addEvent('click', function(e) {
    e = new Event(e).stop();
    var tar = $(e.target);
    if (subscribe_why_box.getStyle('display') == 'block') {
      subscribe_why_box.setStyle('display', 'none');
    }
    else {
      var pos = tar.getPosition();
      var parentOffset = $(tar.getOffsetParent());
      var ppos = parentOffset.getPosition();
      subscribe_why_box.setStyles({display: 'block', top: (pos.y-ppos.y-35)+'px', left: (pos.x-ppos.x+90)+'px'});
    }
  });
  subscribe_why_close.addEvent('click', function(e) {
    subscribe_why_box.setStyle('display', 'none');
  });
});

function changeSubscribeMessage(message)
{
  subscribe_form_message_fx.cancel();
  subscribe_form_message.setStyle('visibility', 'hidden');
  subscribe_form_message.innerHTML = message;
  subscribe_form_message_fx.start('opacity', 0, 1);
}

function checkEmail (strng) {
  var valid = true;
  if (strng == "") {
     valid = false;
  }
  else if (!isRFC822ValidEmail(strng)) {
     valid = false;
  }
  return valid;
}

function isRFC822ValidEmail(sEmail) {

  var sQtext = '[^\\x0d\\x22\\x5c\\x80-\\xff]';
  var sDtext = '[^\\x0d\\x5b-\\x5d\\x80-\\xff]';
  var sAtom = '[^\\x00-\\x20\\x22\\x28\\x29\\x2c\\x2e\\x3a-\\x3c\\x3e\\x40\\x5b-\\x5d\\x7f-\\xff]+';
  var sQuotedPair = '\\x5c[\\x00-\\x7f]';
  var sDomainLiteral = '\\x5b(' + sDtext + '|' + sQuotedPair + ')*\\x5d';
  var sQuotedString = '\\x22(' + sQtext + '|' + sQuotedPair + ')*\\x22';
  var sDomain_ref = sAtom;
  var sSubDomain = '(' + sDomain_ref + '|' + sDomainLiteral + ')';
  var sWord = '(' + sAtom + '|' + sQuotedString + ')';
  var sDomain = sSubDomain + '(\\x2e' + sSubDomain + ')*';
  var sLocalPart = sWord + '(\\x2e' + sWord + ')*';
  var sAddrSpec = sLocalPart + '\\x40' + sDomain; // complete RFC822 email address spec
  var sValidEmail = '^' + sAddrSpec + '$'; // as whole string

  var reValidEmail = new RegExp(sValidEmail);

  if (reValidEmail.test(sEmail)) {
    return true;
  }

  return false;
}