/*Canopy - The next generation of stoner streaming software
Copyright (C) 2024-2026 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/>.*/

//NPM Imports
const {mongoose} = require('mongoose');

//Local Imports
const config = require('./../../config.json');
const package = require('../../package.json');
const tokeSchema = require('./tokebot/tokeSchema');
const loggerUtils = require('./../utils/loggerUtils');

/**
 * DB Schema for single document for keeping track of server stats
 */
const statSchema = new mongoose.Schema({
    //This does NOT handle deleted accounts/channels. Use userModel.estimatedDocumentCount() for number of active users.
    userCount: {
        type: mongoose.SchemaTypes.Number,
        required: true,
        default: 0
    },
    channelCount: {
        type: mongoose.SchemaTypes.Number,
        required: true,
        default: 0
    },
    launchCount: {
        type: mongoose.SchemaTypes.Number,
        required: true,
        default: 0
    },
    firstLaunch: {
        type: mongoose.SchemaTypes.Date,
        required: true,
        default: new Date()
    },
    version:{
        type: mongoose.SchemaTypes.String,
        default: "<0.2.0"
    }
});

//statics

/**
 * Set placeholder variable to hold cached firstLaunch date from stat document
 */
statSchema.statics.firstLaunch = null;

/**
 * Get's servers sole stat document from the DB
 * @returns {Mongoose.Document} Server's sole statistics document
 */
statSchema.statics.getStats = async function(){
    //Get the first document we find
    var stats = await this.findOne({});

    if(stats){
        //If the current listed version doesnt match current running version
        if(stats.version != package.version){
            //Update stat version
            stats.version = package.version;
            //Save stat document
            await stats.save();
        }

        //If we found something then the statistics document exist and this is it,
        //So long as no one else has fucked with the database it should be the only one. (is this forshadowing for a future bug?)
        return stats;
    }else{
        //Otherwise this is the first launch of the install, say hello
        console.log("First launch detected! Initializing statistics document in Database!");

        //create and save the statistics document
        stats = await this.create({});

        //Update stat version
        stats.version = package.version;

        //Save stat document
        await stats.save();

        //live up to the name of the function
        return stats;
    }
}

/**
 * Increments Lunach count upon server launch and prints out amount of launches since server initialization
 */
statSchema.statics.incrementLaunchCount = async function(){
    //get our statistics document
    const stats = await this.getStats();

    //increment counter and save
    stats.launchCount++;
    stats.save();

    //Cache first launch
    this.firstLaunch = stats.firstLaunch;

    //print bootup message to console.
    loggerUtils.welcomeWagon(stats.launchCount, stats.firstLaunch, tokeSchema.count);
}

/**
 * Increments user count upon new user registration
 * @returns {Number} Number of users before count was incremented
 */
statSchema.statics.incrementUserCount = async function(){
    //get our statistics document
    const stats = await this.getStats();
    //temporarily keep old count so we can return it for the users ID 
    const oldCount = stats.userCount;

    //increment counter and save
    stats.userCount++;
    stats.save();

    //return the count from beggining of function for user ID
    return oldCount;
}

/**
 * Increments channel count upon new channel registration
 * @returns {Number} Number of channels before count was incremented
 */
statSchema.statics.incrementChannelCount = async function(){
    //get our statistics document
    const stats = await this.getStats();
    //temporarily keep old count so we can return it for the channel ID 
    const oldCount = stats.channelCount;

    //increment counter and save
    stats.channelCount++;
    stats.save();

    //return the count from beggining of function for channel ID
    return oldCount;
}

module.exports = mongoose.model("statistics", statSchema);