import mariadb from 'mariadb';
import { Handler } from './defaultHandler';
import { Query } from './query';
import { onAction, primaryData } from './types';


export class DB {
    //pool:mariadb.Pool;
    constructor(/*{ host, user, password, database, connectionLimit = 5 }*/) {
        //this.pool = mariadb.createPool({ host, user, password, database, connectionLimit, multipleStatements: true });
    }
    async query(query: Query) {
        //return this.pool.query(query);
    }
    getHandler() {
        return Handler;
    }

    newTable(name: string) {
        return new Table(name);
    }
}

export class Attribute {
    name: string;
    constructor(name: string) {
        this.name = name;
    }
    serialize() {
        return this.toString();
    }
    toString() {
        return this.name;
    }
}


export class Table {
    dbLangTableName: string;
    dbLangTableAttributes: { [key: string]: Attribute; } = {};
    [key: string]: Attribute | any
    constructor(name: string) {
        this.dbLangTableName = name;
    }
    serialize() {
        return this.toString();
    }
    toString() {
        return this.dbLangTableName;
    }
    addAttribute(name: string, ops: {
        unique?: boolean,
        A_I?: boolean,
        default?: primaryData,
        notNull?: boolean
        primaryKey?: boolean,
        foreginKey?: {
            link: Attribute,
            onDelete?: onAction,
            onUpdate?: onAction
        }
    }, noErrorOnNameConflict = false) {
        let attr = new Attribute(name);
        this.dbLangTableAttributes[name] = attr;
        if (["serialize", "toString", "addAttribute", "dbLangTableName", "dbLangTableAttributes"].includes(name)) {
            if (!noErrorOnNameConflict) throw new Error("You cannot name Attribute like Methode of this Table!");
        } else {
            this[name] = attr;
        }
        return attr;
    }
}

export * from './funcs';
export { onAction };