import { MongoClient } from "mongodb";

main()

async function main() {
    const client = await connectToDatabase()
    const newPatch = await fetchLatestPatch()
    
    console.log("Latest patch is: " + newPatch)

    const newDate = new Date()
    if(!(await compareLatestSavedPatch(client, newPatch, newDate))) {
        downloadAssets()
    }

    await client.close()
}


async function fetchLatestPatch() {
    const url = "https://ddragon.leagueoflegends.com/api/versions.json"
    const patchDataResponse = await fetch(url);
    const patchData = await patchDataResponse.json();
    const patch : string = patchData[0];
    return patch;
}

async function connectToDatabase() {
    // Create a MongoClient with a MongoClientOptions object to set the Stable API version
    let uri = `mongodb://${process.env.MONGO_USER}:${process.env.MONGO_PASS}@${process.env.MONGO_HOST}`
    if(process.env.MONGO_URI != undefined && process.env.MONGO_URI != null && process.env.MONGO_URI != "") {
        uri = process.env.MONGO_URI
    }
    const client = new MongoClient(uri)
    await client.connect()
    return client
}

async function compareLatestSavedPatch(client: MongoClient, newPatch : string, newDate : Date) {
    const database = client.db("patches")
    const patches = database.collection("patches")
    const latestPatch = await patches.find().limit(1).sort({date:-1}).next()
    
    console.log("Latest patch in database is: " + latestPatch.patch)
    
    if(latestPatch.patch != newPatch) {
        await patches.insertOne({patch:newPatch, date:newDate})
        return false
    }

    return true
}

async function downloadAssets() {

}