{% extends "base.html" %}
{% load staticfiles %}

{% load bootstrap3 %}

{% block content %}

<style>
    .go_btn{

        position: absolute;
        width: 100px;
        top: 170px;
        height: calc(100% - 170px);

    }
    .go_forward{
        right: 0px;
        border-left: none;
    }

    .go_back{
        left: 251px;
        border-right: none;
    }


    .btn_wrapper{
        text-align: center;
        margin-bottom: 5px;

    }

    {% if DEBUG %}

    .add_btn_wrapper{
        right: 130px;
        top: 10px;
        position: absolute;
    }
    {% endif %}



    .options{
        position: absolute;
        top: 60px;
        right: 20px;
    }

    #breadcrumbs {
        padding: 4px;
    }
    .step{
        background: #DEEED3;
        display: inline;
        padding: 5px;
        margin: 1px;
    }

    .step_active{
        background: #5EC392;
        display: inline;
        padding: 5px;
        margin: 1px;
        font-weight: bold;
    }

    .step_untouched
    {
        background: #98B0AF;
    }

    .step_invalid
    {
        background: #CC3300;
    }

    .step_valid
    {
        background: #0FD57D;
    }

 #viewport-iframe
 {
     height: calc(100vh - 450);
 }


</style>

<button id="gof" onclick="go(step+1)" class="btn go_btn go_forward">Go Forward</button>
<button id="gob" onclick="go(step-1)" class="btn btn go_btn go_back">Go Back</button>

<div class="options">
    <button class="btn" onclick="cancel_wf()">Cancel</button>
</div>
<div class="btn_wrapper">
<div id="breadcrumbs">
</div>
</div>
{% csrf_token %}

<script type="text/javascript">


    update_context();
    var step = 0;
    var page_count = 0;
    var context_data = false;

    function go(to)
    {
        step_on_leave();
        request_leave(to);
    }

    function request_leave(to)
    {
        $.ajax({
            type: "GET",
            url: "/wf/manager/",
            beforeSend: function(request) {
                request.setRequestHeader("X-CSRFToken",
                $('input[name="csrfmiddlewaretoken"]').val());
            },
            success: function (data) {
                confirm_permission(to, data);
                update_page(data);
            }
        });
    }

    function confirm_permission(to, data)
    {
        if( errors_exist(data) )
        {
            var continueanyway = confirm("The current step has errors that will prevent it from saving. Continue anyway?");
            if( !continueanyway )
            {
                return;
            }
        }
        if( to >= page_count )
        {
            to = page_count-1;
        }
        else if( to < 0 )
        {
            to = 0;
        }
        var problem = function() {
            alert("There was a problem");
        }
        //makes an asynch request
        req = new XMLHttpRequest();
        url = "/wf/workflow/?step=" + to;
        req.open("GET", url, true);
        req.onload = function(e) {
            if(req.readyState === 4){
                if(req.status < 300){
                    document.getElementById("viewport-iframe").srcdoc = this.responseText;
                } else { problem(); }
            } else { problem(); }
        }
        req.onerror = problem;
        req.send();
    }

    function step_on_leave()
    {
        document.getElementById("viewport-iframe").contentWindow.step_on_leave();
    }

    function errors_exist(data)
    {
        var stat = data['steps'][data['active']]['valid'];
        if( stat >= 100 && stat < 200 )
        {
            return true;
        }
        else
        {
            return false;
        }
    }

    function update_context() {
        $.ajax({
            type: "GET",
            url: "/wf/manager/",
            beforeSend: function(request) {
                request.setRequestHeader("X-CSRFToken",
                $('input[name="csrfmiddlewaretoken"]').val());
            },
            success: function (data) {
                update_page(data);
            }
        });
    }

    function update_page(data)
    {
        context_data = data;
        update_breadcrumbs(data);
    }

    function update_breadcrumbs(meta_json) {
        step = meta_json['active'];
        page_count = meta_json['steps'].length;
        //remove all children of breadcrumbs so we can redraw
        var container = document.getElementById("breadcrumbs");
        while(container.firstChild){
            container.removeChild(container.firstChild);
        }
        //draw enough rows for all steps
        var depth = meta_json['max_depth'];
        for(var i=0; i<=depth; i++){
            var div = document.createElement("DIV");
            div.id = "row"+i;
            if(i<depth){
                div.style['margin-bottom'] = "7px";
            }
            if(i>0){
                div.style['margin-top'] = "7px";
            }
            container.appendChild(div);
        }
        draw_steps(meta_json);
    }

    function draw_steps(meta_json){
        var all_relations = meta_json['relations'];
        var relations = [];
        var active_steps = [];
        var active_step = step;
        while(active_step < meta_json['steps'].length){
            active_steps.push(active_step);
            var index = meta_json['parents'][active_step];
            var relation = all_relations[index];
            relations.push(relation);
            active_step = relation['parent'];
        }
        var child_index = meta_json['children'][step];
        var my_children = all_relations[child_index];
        if(my_children){
            relations.push(my_children);
        }
        draw_relations(relations, meta_json, active_steps);
    }

    function draw_relations(relations, meta_json, active_steps){
        for(var i=0; i<relations.length; i++){
            var relation = relations[i];
            var children_container = document.createElement("DIV");
            children_container.style['display'] = "inline";
            children_container.style['margin'] = "3px";
            children_container.style['padding'] = "3px";
            console.log("meta_json: ");
            console.log(meta_json);
            for(var j=0; j<relation['children'].length; j++){
                var step_json = meta_json['steps'][relation['children'][j]];
                step_json['index'] = relation['children'][j];
                var active = active_steps.indexOf(step_json['index']) > -1;
                var step_button = create_step(meta_json['steps'][relation['children'][j]], active);
                children_container.appendChild(step_button);
            }
            var parent_div = document.getElementById("row" + relation['depth']);
            parent_div.appendChild(children_container);
        }
    }

    function create_step(step_json, active){
        var step_dom = document.createElement("DIV");
        if(active){
            step_dom.className = "step_active";
            console.log(step_json['message']);

        } else{
            step_dom.className = "step";
        }
        step_dom.appendChild(document.createTextNode(step_json['title']));
        var code = step_json['valid'];
        stat = "";
        msg = "";
        if( code < 100 )
        {
            step_dom.classList.add("step_untouched");

            stat = "";
            msg = "";
        }
        else if( code < 200 )
        {
            step_dom.classList.add("step_invalid");
            stat = "invalid";
            msg = step_json['message'];
        }
        else if( code < 300 )
        {
            step_dom.classList.add("step_valid");
            stat = "valid";
            msg = step_json['message'];
        }
        if(active)
        {
            update_message(msg, stat);
        }

        var step_number = step_json['index'];
        step_dom.onclick = function(){ go(step_number); }
        //TODO: background color and other style
        return step_dom;
    }

    function cancel_wf(){
        $.ajax({
            type: "POST",
            url: "/wf/manager/",
            data: {"cancel":"",},
            beforeSend: function(request) {
                request.setRequestHeader("X-CSRFToken",
                $('input[name="csrfmiddlewaretoken"]').val()
                );
            },
            success: redirect_root()
        });
    }

    function redirect_root()
    {
        window.location.replace('/');
    }

    function add_wf(type){
        add_wf_internal(type, false);
    }

    function add_edit_wf(type, target){
        add_wf_internal(type, target);
    }

    function add_wf_internal(type, itemid){
        data = {"add": type};
        if(itemid){
            data['target'] = itemid;
        }
        $.ajax({
            type: "POST",
            url: "/wf/manager/",
            data: data,
            beforeSend: function(request) {
                request.setRequestHeader("X-CSRFToken",
                $('input[name="csrfmiddlewaretoken"]').val()
                );
            },
            success: refresh_wf_iframe()
        });
    }

    function refresh_wf_iframe() {
        window.location=window.location;
    }
</script>
<div id="iframe_header" class="row view-header">
    <div class="col-lg-12 step_header">
        <h1 class="step_title" id="view_title"></h1>
        <p class="description" id="view_desc"></p>
        <p class="step_message" id="view_message"></p>
    </div>
    <style>
        #view_desc{
            margin-bottom: 15px;
            margin-top: 5px;
            margin-left: 30px;
            display: inline;
        }
        #view_title{
            margin-top: 5px;
            margin-bottom: 0px;
            display: inline;
        }
        #view_message{
            margin-top: 10px;
            margin-bottom: 5px;
            float: right;
        }
        .message_invalid{
            color: #ff4400;
        }
        .message_valid{
            color: #44cc00;
        }
        .step_header{
            border-bottom: 1px solid #eee;
            border-top: 1px solid #eee;
            left: 101px;
            width: calc(100% - 202px);
        }
    </style>
    <script>
        function update_description(title, desc){
            document.getElementById("view_title").innerText = title;
            document.getElementById("view_desc").innerText = desc;
        }
        function update_message(message, stepstatus){
            document.getElementById("view_message").innerText = message;
            document.getElementById("view_message").className = "step_message";
            document.getElementById("view_message").classList.add("message_" + stepstatus);
        }
        function resize_iframe(){
            var page_rect = document.getElementById("wrapper").getBoundingClientRect();
            var title_rect = document.getElementById("iframe_header").getBoundingClientRect();
            var iframe_height = page_rect.bottom - title_rect.bottom;
            console.log("setting height to " + iframe_height);
            document.getElementById("viewport-iframe").height = iframe_height;

        }
     window.addEventListener('load', resize_iframe);
     window.addEventListener('resize', resize_iframe);
    </script>
    <!-- /.col-lg-12 -->
</div>

<iframe src="/wf/workflow" style="position: absolute; left: 351px; right: 105px; width: calc(100% - 450px); border-style: none; border-width: 1px; border-color: #888888;" scrolling="yes" id="viewport-iframe" onload="resize_iframe();"></iframe>
{% endblock content %}