import sqlite3 from'sqlite3'
import { open } from 'sqlite'


/**
 * Manager for handling the sqlite database
 */
export default class SqliteManager{

    constructor(){}

    async init(){
        sqlite3.verbose()
        await open({filename: './database/loginbase.db', driver: sqlite3.Database}).then(
            (db) => {
                console.log('[SQLITE] Connected to the loginbase database.');
                db.run("CREATE TABLE IF NOT EXISTS users (email TEXT PRIMARY KEY, password TEXT)");
                console.log('[SQLITE] Created users table if it didnt exist.');
                db.run("CREATE TABLE IF NOT EXISTS handlers (topic TEXT, message TEXT, requestUrl TEXT)");
                console.log('[SQLITE] Created handlers table if it didnt exist.');
                this.database = db
                this.ready = true
          })
    }

    async getUser(email){
        const result = await this.database.get('SELECT * FROM users WHERE email = ?', email)
        console.log('[SQLITE] Got user from database ['+JSON.stringify(result.email)+'].')
        return result
    }
    
    async addUser(email, password){
        try{
            await this.database.run(`INSERT INTO users(email, password) VALUES(:email, :password)`, {':email': email, ':password':password});
            console.log("[SQLITE] Inserted new user("+email+").")
            return true
        }catch(err){
            console.log("[SQLITE] Failed inserting new user("+email+"): "+err)
            return false
        }
    }

    async getHandlers(){
        const result = await this.database.all('SELECT * FROM handlers')
        console.log('[SQLITE] Got handlers from database ['+JSON.stringify(result)+'].')
        return result
    }

    async addHandler(topic, message, requestUrl){
        try{
            await this.database.run(`INSERT INTO handlers(topic, message, requestUrl) VALUES(:topic, :message, :requestUrl)`, {':topic': topic, ':message':message, ':requestUrl': requestUrl});
            console.log("[SQLITE] Inserted new handler [topic: "+topic+", message: "+message+", requestUrl: "+requestUrl+"].")
            return true
        }catch(err){
            console.log("[SQLITE] Failed inserting new handler [topic: "+topic+", message: "+message+", requestUrl: "+requestUrl+"].")
            return false
        }
    }

    async removeHandler(topic, message, requestUrl){
        const result = await this.database.run('DELETE FROM handlers WHERE topic = :topic AND message = :message AND requestUrl = :requestUrl', {':topic': topic, ':message': message, ':requestUrl': requestUrl})
        if(result.changes>=1){
            console.log("[SQLITE] Deleted message handler [topic: "+topic+", message: "+message+", requestUrl: "+requestUrl+"].")
        }else{
            console.log("[SQLITE] Failed deleting message handler [topic: "+topic+", message: "+message+", requestUrl: "+requestUrl+"].")
        }
        return result
    }


}