/*

 *  Document   : be_comp_chat.js

 *  Author     : pixelcave

 *  Description: Custom JS code used in Chat Page

 */



// Helper variables

let lWindow, lHeader, lFooter, cContainer, cHeight, cHead, cTalk, cPeople, cform, cTimeout;



// Message Classes

let classesMsgBase      = 'rounded font-w600 p-10 mb-10 animated fadeIn',

    classesMsgSelf      = 'ml-50 bg-primary-lighter text-primary-darker',

    classesMsgOther     = 'mr-50 bg-body-light',

    classesMsgHeader    = 'font-size-sm font-italic text-muted text-center mt-20 mb-10';



class BeCompChat {

    /*

     * Init chat

     *

     */

    static initChat() {

        let self = this;



        // Set variables

        lWindow    = jQuery(window);

        lHeader    = jQuery('#page-header');

        lFooter    = jQuery('#page-footer');

        cContainer = jQuery('.js-chat-container');

        cHeight    = cContainer.data('chat-height');

        cHead      = jQuery('.js-chat-head');

        cTalk      = jQuery('.js-chat-talk');

        cPeople    = jQuery('.js-chat-people');

        cform      = jQuery('.js-chat-form');



        // Chat height mode ('auto' for full height, number for specific height in pixels)

        switch (cHeight) {

            case 'auto':

                // Init chat windows' height to full available (also on browser resize or orientation change)

                jQuery(window).on('resize.cb.chat orientationchange.cb.chat', e => {

                    clearTimeout(cTimeout);



                    cTimeout = setTimeout(e => {

                        self.initChatWindows();

                    }, 150);

                }).triggerHandler('resize.cb.chat');

                break;

            default:

                // Init chat windows' height with a specific height

                self.initChatWindows(cHeight);

        }



        // Enable scroll lock to chat talk and people window

        cTalk.scrollLock('enable');



        if (cPeople.length) {

            cPeople.scrollLock('enable');

        }



        // Init form submission

        jQuery('form', cform).on('submit', e => {

            // Stop form submission

            e.preventDefault();



            // Get chat input

            let chatInput = jQuery('.js-chat-input', jQuery(e.currentTarget));



            // Add message

            self.chatAddMessage(chatInput.data('target-chat-id'), chatInput.val(), 'self', chatInput);

        });

    }



    /*

     * Init chat windows' height

     *

     */

    static initChatWindows(customHeight) {

        let cHeightFinal;



        // If height is specified

        if (customHeight) {

            cHeightFinal = parseInt(customHeight);

        } else {

            // Calculate height

            cHeightFinal = lWindow.height() -

                (lHeader.length ? lHeader.outerHeight() : 0) -

                (lFooter.length ? lFooter.outerHeight() : 0) -

                (parseInt(cContainer.css('padding-top')) + parseInt(cContainer.css('padding-bottom'))) -

                cHead.outerHeight();

        }



        // Add a minimum height

        if (cHeightFinal < 200) {

            cHeightFinal = 200;

        }



        // Set height to chat windows (+ people window if exists)

        cTalk.css('height', cHeightFinal - cform.outerHeight());



        if (cPeople.length) {

            cPeople.css('height', cHeightFinal);

        }

    }



    /*

     * Add a header message to a chat window

     *

     */

    static chatAddHeader(chatId, chatMsg) {

        // Get chat window

        let chatWindow = jQuery('.js-chat-talk[data-chat-id="' + chatId + '"]');



        // If time header and chat window exists

        if (chatMsg && chatWindow.length) {

            chatWindow.append('<div class="' + classesMsgHeader + '">'

                    + jQuery('<div />').text(chatMsg).html()

                    + '</div>');



            // Scroll the message list to the bottom

            chatWindow.animate({ scrollTop: chatWindow[0].scrollHeight }, 150);

        }

    }



    /*

     * Add a message to a chat window

     *

     */

    static chatAddMessage(chatId, chatMsg, chatMsgLevel, chatInput) {

        // Get chat window

        let chatWindow = jQuery('.js-chat-talk[data-chat-id="' + chatId + '"]');



        // If message and chat window exists

        if (chatMsg && chatWindow.length) {

            // Post it to its related window (if message level is 'self', make it stand out)

            chatWindow.append('<div class="' + classesMsgBase + ' ' + ((chatMsgLevel === 'self') ? classesMsgSelf : classesMsgOther) + '">'

                    + jQuery('<div />').text(chatMsg).html()

                    + '</div>');



            // Scroll the message list to the bottom

            chatWindow.animate({ scrollTop: chatWindow[0].scrollHeight }, 150);



            // If input is set, reset it

            if (chatInput) {

                chatInput.val('');

            }

        }

    }



    /*

     * Init functionality

     *

     */

    static init() {

        this.initChat();

    }



    /*

     * Add time header

     *

     */

    static addHeader(chatId, chatMsg) {

        this.chatAddHeader(chatId, chatMsg);

    }



    /*

     * Add message

     *

     */

    static addMessage(chatId, chatMsg, chatMsgLevel) {

        this.chatAddMessage(chatId, chatMsg, chatMsgLevel, false);

    }

}



// Initialize when page loads

jQuery(() => {

    BeCompChat.init();

    window.BeCompChat = BeCompChat;

});