import { Client, Databases, Account, Query } from "appwrite";
import { DateTime } from "luxon";

class AppwriteService {
    databaseId = 'lifetracker-db';
    collectionId = "ryan";
    constructor() {
        this.appwrite = new Client().setEndpoint("http://ryanpandya.com:8080/v1").setProject("lifetracker")
        this.database = new Databases(this.appwrite);
        this.account = new Account(this.appwrite);
    }

    subscribe = (callback) => {
        return this.appwrite.subscribe('databases.lifetracker-db.collections.ryan.documents', callback);
            // "databases.${this.databaseId}.collections.${this.collectionId}.documents", callback);
      }      

    addEntry = async ({ date, hours, mood, comments }) => {
        await this.database.createDocument(this.databaseId, this.collectionId, 
            date,
            { date: new Date(date), hours: hours, mood: mood, comments: comments });
    }

    deleteEntry = async (entryId) => {
        await this.database.deleteDocument(this.databaseId, this.collectionId, entryId);
    }

    updateEntry = async ({ date, hours, mood, comments }) => {
        var hours = JSON.parse("[" + hours + "]")
        await this.database.updateDocument(this.databaseId, this.collectionId, 
            date,
            { date: new Date(date), hours: hours, mood: mood, comments: comments });
    }

    getUser = async () => {
        return await this.account.get();
    }

    login = async () => {
        await this.account.createAnonymousSession();
        return await this.getUser();
    }

    getEntries = async (date=null, numEntries=null) => {
        if(date == null){
            date = DateTime.fromObject({
                year: DateTime.now().toFormat("y"),
                month: 1,
                day: 2
              });
        }
        else{
            date = DateTime.fromISO(date);
        }

        var firstEntry = (await this.database.listDocuments(
            this.databaseId, this.collectionId,
            [Query.orderAsc("date"),Query.limit(1)])
        ).documents[0];
        var referenceDate = DateTime.fromISO(firstEntry.date).toUTC();

        var offset = Math.floor(date.diff(referenceDate).as("days")) - 1;

        if (numEntries == null) {
            numEntries = Math.floor(DateTime.now().diff(referenceDate).as("days")) + 7;
        }

        return (await this.database.listDocuments(
            this.databaseId, this.collectionId,
            [
                Query.orderAsc("date"),
                Query.offset(offset),
                Query.limit(numEntries)
            ]
        )
        ).documents;
    }

    logout = () => {
        return this.appwrite.account.deleteSession('current');
    }
}

export default new AppwriteService()