const Collection = require('../../util/Collection.js');

class TransactionHandler {

    constructor(client) {

        this.client = client;
        this.transactions = new Collection();

    }

    _receive(message) {

        if(!message.transactionID) return undefined;
        const transaction = this.transactions.get(message.transactionID);
        
        if(!transaction) return undefined;
        
        if(message.error) transaction.reject(message.message);
        else transaction.resolve(message.result);

        this.transactions.delete(message.transactionID);

    }

    _send(message, options = {}) {

        return new Promise((resolve, reject) => {
            
            const id = this.transactionID;
            this.transactions.set(id, { id, resolve, reject } );

            process.send({ _storage: true, transactionID: id, ...message, ...options });

        });

    }

    get transactionID() {
        return `${[ this.client.shard.ids ]}-${Date.now().toString(36)}`;
    }

}

module.exports = TransactionHandler;