/**
 * Created by rain on 2015/11/11.
 */
/**
 * Use orm - sequelize
 * will be replace by dc implements.
 */
"use strict";

const compose = require('koa-compose');
const Sequelize = require('sequelize');


module.exports = function (app, config) {
    //load orm when start.
    //so insert model when start.
    let orm = new Sequelize(config.url, config.opts);
    let dc = {};
    dc.orm = orm;
    dc.ORM = Sequelize;
    dc.models = {};
    //export dc to app global;
    app.fs = app.fs || {};
    app.fs.dc = dc;
    if (Array.isArray(config.models)) {
        config.models.forEach(function (e) {
            //is function?
            e(dc);
        });
    }
    return function *(ctx, next) {
        //wrap orm and ORM
        ctx.fs = ctx.fs || {};
        ctx.fs.dc = dc;
        yield next();
    };
};