//Libraries
const express = require('express');
const multer = require('multer');
const mysql = require('mysql2');
const games = require('./model/games');
const developers = require('./model/developers');
const publishers = require('./model/publishers');
const {request, response} = require("express");
const {check, checkSchema, validationResult} = require("express-validator");
const path = require('path');
const cors = require('cors');

//Setup defaults for script
const app = express();
app.use(cors());
app.use(express.static('public'));
const storage = multer.diskStorage({
    //Logic where to upload files
    destination: function (request, file, callback) {
        callback(null, 'public/images/')
    },
    //Logic to name the file when uploaded
    filename: function (request, file, callback) {
        callback(null, file.originalname + '-' + Date.now() + path.extname(file.originalname))
    }
})
const upload = multer({
    storage: storage,
    //Validation for file upload
    fileFilter: (request, file, callback) => {
        const allowedFileMimeTypes = ["image/png", "image/jpg", "image/jpeg"];
        callback(null, allowedFileMimeTypes.includes(file.mimetype));
    }
});
const port = 8787;

//The * in app.* needs to match the method type of the request
app.get('/games', upload.none(),
    async (request, response) => {
        let result = {};
        try {
            result = await games.getAllGames(request.query);
        } catch (error) {
            return response
                .status(500) //Error code when something goes wrong with the server
                .setHeader('Access-Control-Allow-Origin', '*') //Prevent CORS error
                .json({message: 'Something went wrong with the server.'});
        }
        //Default response object
        response
            .setHeader('Access-Control-Allow-Origin', '*') //Prevent CORS error
            .json({'data': result});
    });

app.get('/games/:id', upload.none(),
    async (request, response) => {
        console.log("Getting data for game " + request.params.id);
        let result = {};
        try {
            result = await games.getGame(request.params.id);
        } catch (error) {
            return response
                .status(500)
                .setHeader('Access-Control-Allow-Origin', '*') //Prevent CORS error
                .json({message: 'Something went wrong with the server!'})
        }
        response
            .setHeader('Access-Control-Allow-Origin', '*') //Prevent CORS error
            .json({'data': result})
    });

app.get('/developers', upload.none(),
    async (request, response) => {
        let result = {};
        try {
            result = await developers.getDeveloperNames();
        } catch (error) {
            return response
                .status(500) //Error code when something goes wrong with the server
                .setHeader('Access-Control-Allow-Origin', '*') //Prevent CORS error
                .json({message: 'Something went wrong with the server.'});
        }
        //Default response object
        response
            .setHeader('Access-Control-Allow-Origin', '*') //Prevent CORS error
            .json({'data': result});
    });

app.get('/developers/:id', upload.none(),
    async (request, response) => {
        console.log("Getting data for developer " + request.params.id);
        let result = {};
        try {
            result = await developers.getDeveloper(request.params.id);
        } catch (error) {
            return response
                .status(500)
                .setHeader('Access-Control-Allow-Origin', '*') //Prevent CORS error
                .json({message: 'Something went wrong with the server!'})
        }
        response
            .setHeader('Access-Control-Allow-Origin', '*') //Prevent CORS error
            .json({'data': result})
    });

app.get('/publishers', upload.none(),
    async (request, response) => {
        let result = {};
        try {
            result = await publishers.getPublisherNames();
        } catch (error) {
            return response
                .status(500) //Error code when something goes wrong with the server
                .setHeader('Access-Control-Allow-Origin', '*') //Prevent CORS error
                .json({message: 'Something went wrong with the server.'});
        }
        //Default response object
        response
            .setHeader('Access-Control-Allow-Origin', '*') //Prevent CORS error
            .json({'data': result});
    });

app.get('/publishers/:id', upload.none(),
    async (request, response) => {
        console.log("Getting data for publisher " + request.params.id);
        let result = {};
        try {
            result = await publishers.getPublisher(request.params.id);
        } catch (error) {
            return response
                .status(500)
                .setHeader('Access-Control-Allow-Origin', '*') //Prevent CORS error
                .json({message: 'Something went wrong with the server!'})
        }
        response
            .setHeader('Access-Control-Allow-Origin', '*') //Prevent CORS error
            .json({'data': result})
    });

app.post('/games', upload.single('coverArt'),
    check('title', 'You must enter a title.').isLength({min: 3}),
    check('releaseDate', 'You must select a release date.').isDate(["YYYY-MM-DD"]),
    check('win', 'Invalid Windows option.').isIn([0, 1]),
    check('mac', 'Invalid MacOS option.').isIn([0, 1]),
    check('linux', 'Invalid Linux option.').isIn([0, 1]),
    check('shortDescription', 'You must enter a short description of a valid length.').isLength({min:5, max:300}),
    check('longDescription', 'You must enter a long description.').isLength({min:5}),
    checkSchema({
        'coverArt': {
            optional: true,
            custom: {
                options: (value, {req, path}) => !!req.file[path],
                errorMessage: 'Please upload an image file.',
            },
        },
    }),

    async (request, response) => {
        console.log(request.file);
        const errors = validationResult(request);
        if (!errors.isEmpty()) {
            return response
                .status(400)
                .setHeader('Access-Control-Allow-Origin', '*') //Prevent CORS error
                .json({
                    message: 'Request fields or files are invalid.',
                    errors: errors.array(),
                });
        } else {
            console.log(request.query);
            let result = {};
            try {
                result = await games.addNewGame(request.query, request.file.filename);
            } catch (error) {
                console.log(error);
                return response
                    .status(500) //Error code when something goes wrong with the server
                    .setHeader('Access-Control-Allow-Origin', '*') //Prevent CORS error
                    .json({message: 'Something went wrong with the server.'});
            }
            response
                .setHeader('Access-Control-Allow-Origin', '*') //Prevent CORS error
                .json({message: 'Game added successfully!'});
        }
    });

app.post('/developers', upload.none(),
    check('name', 'You must enter a name.').isLength({min: 3}),
    check('description', 'You must enter a description').isLength({min: 5}),
    check('homepage', 'You must enter a valid homepage URL.').isURL(),

    async (request, response) => {

        const errors = validationResult(request);
        if (!errors.isEmpty()) {
            return response
                .status(400)
                .setHeader('Access-Control-Allow-Origin', '*') //Prevent CORS error
                .json({
                    message: 'Request fields or files are invalid.',
                    errors: errors.array(),
                });
        } else {
            console.log(request.query);
            let result = {};
            try {
                result = await developers.addNewDeveloper(request.query);
            } catch (error) {
                console.log(error);
                return response
                    .status(500) //Error code when something goes wrong with the server
                    .setHeader('Access-Control-Allow-Origin', '*') //Prevent CORS error
                    .json({message: 'Something went wrong with the server.'});
            }
            response
                .setHeader('Access-Control-Allow-Origin', '*') //Prevent CORS error
                .json({message: 'Developer added successfully!'});
        }
    });

app.post('/publishers', upload.none(),
    check('name', 'You must enter a name.').isLength({min: 3}),
    check('description', 'You must enter a description').isLength({min: 5}),
    check('homepage', 'You must enter a valid homepage URL.').isURL(),

    async (request, response) => {

        const errors = validationResult(request);
        if (!errors.isEmpty()) {
            return response
                .status(400)
                .setHeader('Access-Control-Allow-Origin', '*') //Prevent CORS error
                .json({
                    message: 'Request fields or files are invalid.',
                    errors: errors.array(),
                });
        } else {
            console.log(request.query);
            let result = {};
            try {
                result = await publishers.addNewPublisher(request.query);
            } catch (error) {
                console.log(error);
                return response
                    .status(500) //Error code when something goes wrong with the server
                    .setHeader('Access-Control-Allow-Origin', '*') //Prevent CORS error
                    .json({message: 'Something went wrong with the server.'});
            }
            response
                .setHeader('Access-Control-Allow-Origin', '*') //Prevent CORS error
                .json({message: 'Publisher added successfully!'});
        }
    });

app.put('/games/:id', upload.single('coverArt'),
    check('title', 'You must enter a title.').isLength({min: 3}),
    check('releaseDate', 'You must select a release date.').isDate(["YYYY-MM-DD"]),
    check('win', 'Invalid Windows option.').isIn([0, 1]),
    check('mac', 'Invalid MacOS option.').isIn([0, 1]),
    check('linux', 'Invalid Linux option.').isIn([0, 1]),
    check('shortDescription', 'You must enter a description'),
    checkSchema({
        'coverArt': {
            optional: true,
            custom: {
                options: (value, {req, path}) => !!req.file[path],
                errorMessage: 'Please upload an image file.',
            },
        },
    }),

    async (request, response) => {

        const errors = validationResult(request);
        if (!errors.isEmpty()) {
            return response
                .status(400)
                .setHeader('Access-Control-Allow-Origin', '*') //Prevent CORS error
                .json({
                    message: 'Request fields or files are invalid.',
                    errors: errors.array(),
                });
        } else {
            console.log(request.query);
            let result = {};
            try {
                result = await games.editGame(request.query.id, request.query, request.file.filename);
            } catch (error) {
                console.log(error);
                return response
                    .status(500) //Error code when something goes wrong with the server
                    .setHeader('Access-Control-Allow-Origin', '*') //Prevent CORS error
                    .json({message: 'Something went wrong with the server.'});
            }
            response
                .setHeader('Access-Control-Allow-Origin', '*') //Prevent CORS error
                .json({message: 'Game added successfully!'});
        }
    });

app.delete('/games/:id', upload.none(),

    async (request, response) => {
        let result = {};
        try {
            result = await games.deleteGame(request.query.id);
        } catch (error) {
            console.log(error);
            return response
                .status(500) //Error code when something goes wrong with the server
                .setHeader('Access-Control-Allow-Origin', '*') //Prevent CORS error
                .json({message: 'Something went wrong with the server.'});
        }
        response
            .setHeader('Access-Control-Allow-Origin', '*') //Prevent CORS error
            .json({message: 'Game deleted successfully!'});

    });

app.listen(port, () => {
    console.log(`Application listening at http://localhost:${port}`);
})