$(document).ready(function(){
    //table row expander
    $('.expander').each(function(){
        //show or hide rows when clicked
        $(this).click(function(){
            if($(this).hasClass("expanded")){
                collapse_event(this);
            }
            else{
                expand_event(this);
            }
        });
    });
});

function collapse_event(elt){
    var id=$(elt).attr('id');
    $(elt).removeClass("expanded");
    $(elt).text("+");
    $(elt).attr('t', "Show events");
    $('.event_'+id).hide();
    $('#vtip').text("Show events");
    /*
    $('.event_'+id+' div').slideUp(200, function(){
        $('.event_'+id).hide();
        $('#vtip').text("Show events");
    });
    */
}
function expand_event(elt){
    var id=$(elt).attr('id');
    $(elt).addClass("expanded");
    $(elt).text("-");
    $(elt).attr('t', "Hide events");
    $('.event_'+id).show();
    $('#vtip').text("Hide events");
    /*
    $('.event_'+id+' div').slideDown(200, function(){
            $('#vtip').text("Hide events");
    });
    */
}

function collapse_all() {
    $('.collapse_all').css({'color' : '#6096B4', 'font-weight' : 'bold', 'text-decoration' : 'none'});
    $('.expand_all').css({'color' : '#333333', 'font-weight' : 'normal'});

    $(".expander").each(function() {
        if($(this).hasClass("expanded")){
            collapse_event(this);
        }
    });
    
    return false;
}

function expand_all() {
    $('.expand_all').css({'color' : '#6096B4', 'font-weight' : 'bold', 'text-decoration' : 'none'});
    $('.collapse_all').css({'color' : '#333333', 'font-weight' : 'normal'});
    
    $(".expander").each(function() {
        if(!$(this).hasClass("expanded")){
            expand_event(this);
        }
    });
    
    return false;
}


var updating = false;


function strstr (haystack, needle, bool) {
    var pos = 0;
    
    haystack += '';
    pos = haystack.indexOf( needle );
    if (pos == -1) {
        return false;
    }
    else{
        if (bool){
            return haystack.substr( 0, pos );
        }
        else{
            return haystack.slice( pos );
        }
    }
}


function update_event(id, handler_url, rsvp, rsvp_first_timers){
    var checkbox = document.getElementById('checkbox-'+id);
    var proceed = true;
    
    if((checkbox.checked) && rsvp) {
        proceed = confirm("By adding this event to your calendar an official RSVP will be sent to APAM administration. \n\nDo you wish to proceed?");
    }
    else if((checkbox.checked) && rsvp_first_timers) {
        proceed = confirm("This event is open to all APAM first time attendees. By adding this event to your calendar an official RSVP will be sent to APAM administration. \n\nDo you wish to proceed?");
    }
    
    if(proceed){
        if(document.getElementById('checkbox-'+id).checked){
            var params = 'add[]='+id;
        }
        else {
            var params = 'remove[]='+id;
        }

        params = params+'submit=submit';
    
        submit_event(id, params, handler_url);
    }
    else {
        checkbox.checked = false;
    }
}


function submit_event(id, params, handler_url){
    updating = true;
    
    if(id.length > 0){
        $('#checkbox-'+id).disabled=true;
    }
    
    $.ajax({
        type: "POST",
        url: handler_url,
        data: params,
        success: function(msg){
            updating = false;
            if(id.length > 0){
                $('#checkbox-'+id).disabled=false;
            }
        }
    });
    
    return false;
}


window.onbeforeunload = confirmExit;
function confirmExit(){
    if(updating == true) {
        return "There are currently events being saved to your schedule. Please wait a moment for this process to complete to avoid losing data.";
    }
}