// Test Observable //

import mongoose, { Model } from "mongoose";
import { Subject, map } from "rxjs";
const used = process.memoryUsage();

let MongooseConnection: mongoose.Connection
let connectionStatus = 0

let mongoStorage: any = {
    type: `MongoDB`,
    url: `mongodb://192.168.100.59:27017/fromEnzo`
}

let data: any[] = []

// Conect to designated storage destination
async function connectMongo(storage: Storage) {
    return new Promise((resolve, reject) => {
        try {
            console.log(`Connecting to ${storage.url}`)
            MongooseConnection = mongoose.createConnection(storage.url)
            connectionStatus = 1
            resolve(connectionStatus)
        }
        catch (error) {
            connectionStatus = 0
            console.error('An error occurred while connecting to the database:', error);
            setTimeout(() => {
                connectMongo(storage).then(() => {
                    resolve(connectionStatus)
                })
                console.log(`Reconnecting...`)
            }, 3000);
        }
    })
}

async function getMongoData(storage: Storage) {
    return new Promise<any>(async (resolve, reject) => {
        await connectMongo(storage);
        const Message: Model<any> = MongooseConnection.model('Message', require('../types/message.schema'));
        try {
            data = await Message.find().limit(10000) 
            resolve(data)
        } catch (err) {
            console.error(err);
        }
    })
}


let testSubject: Subject<any> = new Subject()

getMongoData(mongoStorage).then((data) => {
    data.forEach(element => {
        testSubject.next(element)
        // console.log(`Memory usage: ${used.heapUsed / 1024 / 1024} MB`);
    })
})

let count = 0

testSubject.subscribe({
    next: (e) => {
        count++
        console.log(count)
    }
});

let pipedObs = testSubject.pipe(
    map((element) => {
        let finalResponse: any = {
            message: 'Piped element'
        }
        return finalResponse
    })
)

pipedObs.subscribe(element => {
    count ++
    console.log(element.message + count)
})