const express = require('express');
const mongoose = require('mongoose');
const app = express();
const cors = require('cors');

app.use(cors(), express.json());

const port = process.env.PORT || 5000;
const MONGO_IP_ADDRESS = '192.168.100.102';

mongoose.connect(`mongodb://${MONGO_IP_ADDRESS}/storage`, {useNewUrlParser: true});
const db = mongoose.connection;

db.on('error', console.error.bind(console, 'connection error:'));
db.once('open', function() {
    console.log(`connected to mongodb: ${MONGO_IP_ADDRESS}`);
});




/*------------MODELS------------*/
//create schema
var itemSchema = new mongoose.Schema({
    id: String,
    name: String,
    description: String,
    quantity: Number
});

var boxSchema = new mongoose.Schema({
    id: String,
    name: String,
    description: String,
    item: [itemSchema],
});

//compile schema into model
var Box = mongoose.model('box', boxSchema, 'box');
var Item = mongoose.model('item', itemSchema, 'item');
/*------------/MODELS------------*/

/*------------CONTROLLER------------*/
app.listen(port, () => console.log(`Listening on port ${port}`));

// get all boxes
app.get('/box', async (request, response) => {
    const boxes = await getAllBoxes();
    response.send(boxes);
});

// create box
app.post('/box', async (request, response) => {
    await Box.create(request.body);
    const updatedBoxes = await getAllBoxes();
    response.send(updatedBoxes);
});
//edit box
app.put('/box/:id', async (request, response) => {
    const id = request.params.id;
    await Box.updateOne({_id: id},{ $set: request.body});
    const updatedBoxes = await getAllBoxes();
    response.send(updatedBoxes);
});
//delete box
app.delete('/box/:id', async (request, response) => {
    await Box.deleteOne({_id: request.params.id});
    const updatedBoxes = await getAllBoxes();
    console.log(updatedBoxes);
    response.send(updatedBoxes);
});

//create item
app.post('/box/:id/item', async (request, response) => {
    const id = request.params.id;
    const query = {_id: id};
    await Box.updateOne(query, {
        $push: { item: request.body }
    });
    const updatedBox = await getBox(id);
    response.send(updatedBox);
});
//edit item
app.put('/box/:boxId/item/:itemId', async (request, response) => {
    const boxID = request.params.boxId;
    const itemID = request.params.itemId;
    await Box.updateOne({ 'item._id': itemID }, {
        $set: { item: request.body }
    })
    const updatedBox = await getBox(boxID);
    response.send(updatedBox);
});
//delete item
app.delete('/box/:boxId/item/:itemId', async (request, response) => {
    const boxID = request.params.boxId;
    const itemID = request.params.itemId;
    await Box.update({ _id: boxID }, { $pull: { item: { _id: itemID } } });
    const box = await getBox(boxID);
    response.send(box);
});


/*------------/CONTROLLER------------*/

const getAllBoxes = async (queryParameters) => {
    queryParameters = queryParameters ?? {};
    const data = await Box.find(queryParameters);
    return data;
}

const getBox = async (id) => {
    const data = await Box.findById(id);
    return data;
}