/*Canopy - The next generation of stoner streaming software
Copyright (C) 2024-2025 Rainbownapkin and the TTN Community

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as
published by the Free Software Foundation, either version 3 of the
License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU Affero General Public License for more details.

You should have received a copy of the GNU Affero General Public License
along with this program.  If not, see <https://www.gnu.org/licenses/>.*/

/**
 * Class for handling incoming Private Messages for the entire client
 */
class pmHandler{
    /**
     * Instantiates a new Private Message Handler object
     * @param {channel} client - Parent client Management Object
     */
    constructor(client){
        /**
         * Parent client management object
         */
        this.client = client;

        /**
         * PM Icon in the main chat bar
         */
        this.pmIcon = document.querySelector('#chat-panel-pm-icon');

        /**
         * List of PM Sessions
         */
        this.seshList = new Map();

        this.defineListeners();
        this.setupInput();
    }

    /**
     * Defines network related event listeners for PM Handler
     */
    defineListeners(){
        this.client.pmSocket.on("message", this.handlePM.bind(this));
        this.client.pmSocket.on("sent", this.handlePM.bind(this));
    }

    /**
     * Defines inpet related event listeners for PM handler
     */
    setupInput(){
        this.pmIcon.addEventListener("click", ()=>{this.client.cPanel.setActivePanel(new pmPanel(client))});
    }

    /**
     * Handles received Private Messages from the PM service on the server, organizing it into the proper session from the sesh list
     * Or creating a new sesh where a matching one does not a exist
     * @param {object} data - Private Message data from the server
     */
    handlePM(data){
        //Store whether or not current message has been consumed by an existing sesh
        let consumed = false;

        const nameObj = pmHandler.genSeshName(data);

        //Create members array from scratch to avoid changing the input data for further processing
        const members = nameObj.recipients;

        //For each existing sesh
        for(const seshEntry of this.seshList){
            //Pull sesh object from map entry
            const sesh = seshEntry[1];

            //If currently checked sesh ID matches calculated message sesh id
            if(sesh.id == nameObj.name){
                //Dump collected message into the matching session
                sesh.messages.push(data);

                //Add sesh to sesh map
                this.seshList.set(sesh.id, sesh);

                //Let the rest of the method know that we've consumed this message
                consumed = true;
            }
        }

        //If we made it through the loop without consuming the message
        if(!consumed){
            //Generate a new sesh
            const sesh = new pmSesh(data, client);

            //Add it to the sesh list
            this.seshList.set(sesh.id, sesh);
        }
    }

    static genSeshName(message){
        const recipients = [];

        //Manually iterate through recipients
        for(const member of message.recipients){
            //check to make sure we're not adding ourselves
            if(member != client.user.user){
                //Copy relevant array members by value instead of reference
                recipients.push(member);
            }
        }

        //If this wasn't our message
        if(message.user != client.user.user){
            //Push sender onto members list
            recipients.push(message.user);
        }

        //Sort recipients
        recipients.sort();

        return {
            name: recipients.join(', '),
            recipients
        }
    }
}

/**
 * Class which represents an existing Private Messaging session between two or more users
 */
class pmSesh{
    /**
     * Instatiates a new pmSession object
     * @param {Object} message - Initial Private Message object from server that initiated the session
     */
    constructor(message, client){
         /**
         * Parent client management object
         */
        this.client = client;       

        const nameObj = pmHandler.genSeshName(message);

        /**
         * Members of session excluding the currently logged in user
         */
        this.recipients = nameObj.recipients

        /**
         * Name of the chat sesh, named after out-going recipients
         */
        this.id = nameObj.name;

        /**
         * Array containing all session messages
         */
        this.messages = (message.msg == "" || message.msg == null) ? [] : [message];
    }
}