import { GraphQLClient } from 'graphql-request';
import { Variables } from 'graphql-request/dist/types';

import Config from '../config';
import { ConfigStoreService } from '../services';

class GraphQLService {
    protected client: GraphQLClient;
    constructor() {
        this.client = new GraphQLClient(Config.SERVER_URL);
    }

    public async query(query: string, variables?: Variables): Promise<any> {
        this.setHeader();
        return this.client.request(query, variables);
    }

    public async mutation(mutation: string, variables?: Variables) {
        this.setHeader();
        return this.client.request(mutation, variables);
    }

    public getToken() {
        return ConfigStoreService.get('token');
    }

    private setHeader() {
        const token = this.getToken();
        if (token) {
            this.client.setHeader('Authorization', `Bearer ${token}`);
        }
    }
}

export default new GraphQLService();