Refactor UI
diff --git a/erpnext/crm/doctype/appointment/appointment.json b/erpnext/crm/doctype/appointment/appointment.json
index ec63420..8392549 100644
--- a/erpnext/crm/doctype/appointment/appointment.json
+++ b/erpnext/crm/doctype/appointment/appointment.json
@@ -28,12 +28,14 @@
   {
    "fieldname": "customer_phone_number",
    "fieldtype": "Data",
-   "label": "Phone Number"
+   "label": "Phone Number",
+   "reqd": 1
   },
   {
    "fieldname": "customer_skype",
    "fieldtype": "Data",
-   "label": "Skype ID"
+   "label": "Skype ID",
+   "reqd": 1
   },
   {
    "fieldname": "customer_details",
@@ -48,7 +50,7 @@
    "reqd": 1
   }
  ],
- "modified": "2019-09-09 12:23:33.611408",
+ "modified": "2019-09-09 15:40:21.881421",
  "modified_by": "Administrator",
  "module": "CRM",
  "name": "Appointment",
diff --git a/erpnext/www/book-appointment/index.css b/erpnext/www/book-appointment/index.css
index 3ffe996..a6e6313 100644
--- a/erpnext/www/book-appointment/index.css
+++ b/erpnext/www/book-appointment/index.css
@@ -1,7 +1,12 @@
 .time-slot {
-    margin: 0 0;
+    margin-bottom: 2em;
+    margin-left: 0.5em;
+    margin-right: 0.5em;
+    border-radius: 0.4em;
+    cursor: pointer;
     border: 0.5px solid #cccccc;
-    min-height: 100px;
+    min-height: 75px;
+    padding: 0.5em 1em;
 }
 
 .time-slot:hover {
@@ -9,9 +14,13 @@
 }
 
 .time-slot.unavailable {
-    background: #bbb;
+    background: #CBD5E0;
+    cursor: not-allowed;
+    color: #718096
+}
 
-    color: #777777
+.time-slot.unavailable .text-muted {
+    color: #718096
 }
 
 input[type="radio"] {
@@ -22,4 +31,8 @@
 .time-slot.selected {
     color: white;
     background: #5e64ff;
-}
\ No newline at end of file
+}
+
+.time-slot.selected .text-muted {
+    color: #EDF2F7 !important;
+}
diff --git a/erpnext/www/book-appointment/index.html b/erpnext/www/book-appointment/index.html
index b705f9e..b915484 100644
--- a/erpnext/www/book-appointment/index.html
+++ b/erpnext/www/book-appointment/index.html
@@ -2,69 +2,60 @@
 
 {% block title %}{{ _("Book Appointment") }}{% endblock %}
 
+{% block script %}
+    <script src="assets/js/moment-bundle.min.js"></script>
+    <script src="book-appointment/index.js"></script>
+{% endblock %}
+
 {% block page_content %}
 <div class="container">
     <!-- title: Book an appointment -->
-    <div id="select-date">
+    <div id="select-date-time">
         <div class="text-center mb-5">
             <h3>Book an appointment</h3>
-            <p class="lead">Select the date and your timezone</p>
+            <p class="lead text-muted">Select the date and your timezone</p>
         </div>
         <div class="row justify-content-center mt-3">
-            <div class="col-md-4 align-self-center ">
-                <form name="myform">
-                    <input type="date" onchange="validate_date()" name="appointment-date" id="appointment-date"
-                        class="form-control mt-3">
-                    <select name="appointment-timezone" id="appointment-timezone" class="form-control mt-3">
+            <div class="col-md-6 align-self-center ">
+                <div class="row">
+                    <input type="date" oninput="on_date_or_timezone_select()" name="appointment-date" id="appointment-date"
+                        class="form-control mt-3 col-md m-3">
+                    <select name="appointment-timezone" oninput="on_date_or_timezone_select()" id="appointment-timezone" class="form-control mt-3 col-md">
                     </select>
-                </form>
-                <button class="form-control mt-3 btn btn-dark" id="next-button" onclick="navigate_to_time_select()">
-                    Next
-                </button>
-            </div>
-        </div>
-    </div>
-
-    <!--Select Time Slot-->
-    <div id="select-time">
-        <div class="text-center mb-5">
-            <h3>Pick A Time Slot</h3>
-            <p class="lead">Selected date is <span class="date-span">Date Span</span></p>
-        </div>
-        <div class="mt-3 justify-content-center">
-            <div class="row" id="timeslot-container">
-                
-            </div>
-            <div class="row justify-content-center">
-                <div class="col-md-4 align-self-center">
-                    <button class="form-control mt-5 btn btn-dark" onclick="initialise_enter_details()">
-                        Next
-                    </button>
                 </div>
             </div>
         </div>
-    </div>
-
-    <!--Enter Details-->
-    <div id="enter-details">
-        <div class="text-center mb-5">
-            <h3>Add details</h3>
-            <p class="lead">Selected date is <span class="date-span">Date Span</span> at <span class="time-span"> time </span></p>
+        <div class="row mt-3" id="timeslot-container" >
+            
         </div>
         <div class="row justify-content-center mt-3">
-            <div class="col-md-4 align-items-center">
-                <input class="form-control mt-3" type="text" name="customer_name" id="customer_name" placeholder="Your Name"
-                    required>
-                <input class="form-control mt-3" type="tel" name="customer_number" id="customer_number"
-                    placeholder="Contact Number" required>
-                <input class="form-control mt-3" type="text" name="customer_skype" id="customer_skype" placeholder="Skype"
-                    required>
-                <textarea class="form-control mt-3" name="customer_notes" id="customer_notes" cols="30" rows="10"
-                    placeholder="Notes"></textarea>
-                <button class="btn btn-primary form-control mt-3" onclick="submit()">Submit</button>
+            <div class="col-md-4">
+                <button class="btn btn-primary form-control" id="next-button">Next</button>
             </div>
         </div>
     </div>
 </div>
+<!--Enter Details-->
+<div id="enter-details">
+    <div class="text-center mb-5">
+        <h3>Add details</h3>
+        <p class="lead">Selected date is <span class="date-span"></span> at <span class="time-span">
+            </span></p>
+    </div>
+    <div class="row justify-content-center mt-3">
+        <div class="col-md-4 align-items-center">
+            <input class="form-control mt-3" type="text" name="customer_name" id="customer_name" placeholder="Your Name"
+                required>
+            <input class="form-control mt-3" type="tel" name="customer_number" id="customer_number"
+                placeholder="Contact Number" required>
+            <input class="form-control mt-3" type="text" name="customer_skype" id="customer_skype" placeholder="Skype"
+                required>
+            <textarea class="form-control mt-3" name="customer_notes" id="customer_notes" cols="30" rows="10"
+                placeholder="Notes"></textarea>
+            <button class="btn btn-primary form-control mt-3" onclick="submit()" id="submit-button">Submit</button>
+        </div>
+    </div>
+</div>
+</div>
 
 {% endblock %}
\ No newline at end of file
diff --git a/erpnext/www/book-appointment/index.js b/erpnext/www/book-appointment/index.js
index e1a2338..bb21ddf 100644
--- a/erpnext/www/book-appointment/index.js
+++ b/erpnext/www/book-appointment/index.js
@@ -2,47 +2,35 @@
 frappe.ready(() => {
     initialise_select_date()
 })
-var holiday_list = [];
+window.holiday_list = [];
 
-function navigator(page_no) {
-    let select_date_div = document.getElementById('select-date');
-    select_date_div.style.display = 'none';
-    let select_time_div = document.getElementById('select-time');
-    select_time_div.style.display = 'none';
-    let contact_details_div = document.getElementById('enter-details');
-    contact_details_div.style.display = 'none';
-    let page;
-    switch (page_no) {
-        case 1: page = select_date_div; break;
-        case 2: page = select_time_div; break;
-        case 3: page = contact_details_div; break;
-    }
-    page.style.display = 'block'
+async function initialise_select_date() {
+    document.getElementById('enter-details').style.display = 'none';
+    await get_global_variables();
+    setup_date_picker();
+    setup_timezone_selector();
+    hide_next_button();
 }
 
-// Page 1
-async function initialise_select_date() {
-    navigator(1);
-    let timezones, settings;
-    settings = (await frappe.call({
+async function get_global_variables() {
+    window.appointment_settings = (await frappe.call({
         method: 'erpnext.www.book-appointment.index.get_appointment_settings'
     })).message
-    timezones = (await frappe.call({
+    window.timezones = (await frappe.call({
         method: 'erpnext.www.book-appointment.index.get_timezones'
     })).message;
-    holiday_list = (await frappe.call({
+    window.holiday_list = (await frappe.call({
         method: 'erpnext.www.book-appointment.index.get_holiday_list',
         args: {
-            'holiday_list_name': settings.holiday_list
+            'holiday_list_name': window.appointment_settings.holiday_list
         }
     })).message;
-    let date_picker = document.getElementById('appointment-date');
-    date_picker.max = holiday_list.to_date;
-    date_picker.min = holiday_list.from_date;
-    date_picker.value = (new Date()).toISOString().substr(0, 10);
+}
+
+function setup_timezone_selector() {
     let timezones_element = document.getElementById('appointment-timezone');
     var offset = new Date().getTimezoneOffset();
-    timezones.forEach(timezone => {
+    window.timezones.forEach(timezone => {
         var opt = document.createElement('option');
         opt.value = timezone.offset;
         opt.innerHTML = timezone.timezone_name;
@@ -51,56 +39,90 @@
     });
 }
 
-function validate_date() {
+function setup_date_picker() {
     let date_picker = document.getElementById('appointment-date');
-    if (date_picker.value === '') {
-        frappe.throw('Please select a date')
-    }
+    let today = new Date();
+    date_picker.min = today.toISOString().substr(0, 10);
+    date_picker.max = window.holiday_list.to_date;
 }
 
-// Page 2
-async function navigate_to_time_select() {
-    navigator(2);
-    timezone = document.getElementById('appointment-timezone').value
-    date = document.getElementById('appointment-date').value;
-    var date_spans = document.getElementsByClassName('date-span');
-    for (var i = 0; i < date_spans.length; i++) date_spans[i].innerHTML = date;
-    // date_span.addEventListener('click',initialise_select_date)
-    // date_span.style.color = '#5e64ff';
-    // date_span.style.textDecoration = 'underline';
-    // date_span.style.cursor = 'pointer';
-    var slots = (await frappe.call({
+function hide_next_button(){
+    let next_button = document.getElementById('next-button');
+    next_button.disabled = true;
+    next_button.onclick = ()=>{frappe.msgprint("Please select a date and time")};
+}
+
+function show_next_button(){
+    let next_button = document.getElementById('next-button');
+    next_button.disabled = false;
+    next_button.onclick = setup_details_page;
+}
+
+function on_date_or_timezone_select() {
+    let date_picker = document.getElementById('appointment-date');
+    let timezone = document.getElementById('appointment-timezone');
+    if (date_picker.value === '') {
+        clear_time_slots();
+        hide_next_button();
+        frappe.throw('Please select a date');
+    }
+    window.selected_date = date_picker.value;
+    window.selected_timezone = timezone.value;
+    update_time_slots(date_picker.value, timezone.value);
+}
+
+async function get_time_slots(date, timezone) {
+    debugger
+    let slots = (await frappe.call({
         method: 'erpnext.www.book-appointment.index.get_appointment_slots',
         args: {
             date: date,
             timezone: timezone
         }
     })).message;
-    let timeslot_container = document.getElementById('timeslot-container');
-    console.log(slots)
-    if (slots.length <= 0) {
-        let message_div = document.createElement('p');
+    return slots;
+}
 
+async function update_time_slots(selected_date, selected_timezone) {
+    let timeslot_container = document.getElementById('timeslot-container');
+    window.slots = await get_time_slots(selected_date, selected_timezone);
+    clear_time_slots();
+    if (window.slots.length <= 0) {
+        let message_div = document.createElement('p');
         message_div.innerHTML = "There are no slots available on this date";
         timeslot_container.appendChild(message_div);
+        return
     }
-    for (let i = 0; i < slots.length; i++) {
-        const slot = slots[i];
+    window.slots.forEach(slot => {
+        let start_time = new Date(slot.time)
         var timeslot_div = document.createElement('div');
         timeslot_div.classList.add('time-slot');
         timeslot_div.classList.add('col-md');
         if (!slot.availability) {
             timeslot_div.classList.add('unavailable')
         }
-        timeslot_div.innerHTML = slot.time.substr(11, 20);
+        timeslot_div.innerHTML = get_slot_layout(start_time);
         timeslot_div.id = slot.time.substr(11, 20);
+        timeslot_div.addEventListener('click', select_time);
         timeslot_container.appendChild(timeslot_div);
+    });
+    set_default_timeslot();
+    show_next_button();
+}
+
+function clear_time_slots() {
+    let timeslot_container = document.getElementById('timeslot-container');
+    while (timeslot_container.firstChild) {
+        timeslot_container.removeChild(timeslot_container.firstChild)
     }
-    set_default_timeslot()
-    let time_slot_divs = document.getElementsByClassName('time-slot');
-    for (var i = 0; i < time_slot_divs.length; i++) {
-        time_slot_divs[i].addEventListener('click', select_time);
-    }
+}
+
+function get_slot_layout(time) {
+    time = new Date(time)
+    let start_time_string = moment(time).format("LT");
+    let end_time = moment(time).add('1','hours');
+    let end_time_string = end_time.format("LT");
+    return `<span style="font-size: 1.2em;">${start_time_string}</span><br><span class="text-muted small">to ${end_time_string}</span>`;
 }
 
 function select_time() {
@@ -110,8 +132,10 @@
     try {
         selected_element = document.getElementsByClassName('selected')[0]
     } catch (e) {
+        debugger
         this.classList.add("selected")
     }
+    window.selected_time = this.id
     selected_element.classList.remove("selected");
     this.classList.add("selected");
 }
@@ -127,23 +151,23 @@
     }
 }
 
-function initialise_enter_details() {
-    navigator(3);
-    let time_div = document.getElementsByClassName('selected')[0];
-    let time_span = document.getElementsByClassName('time-span')[0];
-    time_span.innerHTML = time_div.id
+function setup_details_page(){
+    let page1 = document.getElementById('select-date-time');
+    let page2 = document.getElementById('enter-details');
+    page1.style.display = 'none';
+    page2.style.display = 'block';
+
+    let date_container = document.getElementsByClassName('date-span')[0];
+    let time_container = document.getElementsByClassName('time-span')[0];
+
+    date_container.innerHTML = new Date(window.selected_date).toLocaleDateString();
+    time_container.innerHTML = moment(window.selected_time,"HH:mm:ss").format("LT");
 }
 
 async function submit() {
-    var date = document.getElementById('appointment-date').value;
-    var time = document.getElementsByClassName('selected')[0].id;
-    contact = {};
-    contact.name = document.getElementById('customer_name').value;
-    contact.number = document.getElementById('customer_number').value;
-    contact.skype = document.getElementById('customer_skype').value;
-    contact.notes = document.getElementById('customer_notes').value;
-    console.log({ date, time, contact });
-    let abc = (await frappe.call({
+    // form validation here
+    form_validation();
+    let appointment = (await frappe.call({
         method: 'erpnext.www.book-appointment.index.create_appointment',
         args: {
             'date': date,
@@ -151,5 +175,20 @@
             'contact': contact
         }
     })).message;
-    console.log(abc)
+    frappe.msgprint(__('Appointment Created Successfully'));
+    let button = document.getElementById('submit-button');
+    button.disabled = true;
+    button.onclick = () => { console.log('This should never have happened') }
 } 
+
+function form_validation(){
+    var date = window.selected_date;
+    var time = document.getElementsByClassName('selected')[0].id;
+    contact = {};
+    contact.name = document.getElementById('customer_name').value;
+    contact.number = document.getElementById('customer_number').value;
+    contact.skype = document.getElementById('customer_skype').value;
+    contact.notes = document.getElementById('customer_notes').value;
+    window.contact = contact
+    console.log({ date, time, contact });
+}