const express = require("express");

const bodyParser = require("body-parser");

const ejs = require("ejs");

const mongoose = require("mongoose");

const app = express();

app.set('view engine', 'ejs');

app.use(bodyParser.urlencoded({

    extended: true

}));

app.use(express.static("public"));

mongoose.connect("mongodb://localhost:27017/wikiDB", {useNewUrlParser: true});

const articleSchema = {

    title: String,

    content: String

};

const Article = mongoose.model("Article", articleSchema);

// Requests Targeting All Routes

app.route("/articles")

.get(function(req, res) {

    Article.find()

        .then((foundArticles) => {

            mongoose.connection.close();

            foundArticles.forEach(function(foundArticle) {

                // console.log(foundArticle);

                res.send(foundArticles);

            })

        })

        .catch(function(err) {

            console.log(err);

        })

})

.post(function(req, res) {

    const newArticle = new Article({

        title: req.body.title,

        content: req.body.content

    });

    newArticle.save()

        .then(function() {

            res.send("Successfully added a new article.");

        })

        .catch(function(err) {

            console.log(err);

        })

})

.delete(function(req, res) {

    Article.deleteMany()

        .then(() => {

            res.send("Successfully deleted the document.");

        })

        .catch(function(err) {

            console.log(err);

        })

});

// Requests Targeting Specific Routes

app.route("/articles/:articleTitle")

.get(function(req, res) {

    const title = req.params.articleTitle;

    Article.find({title})

        .then((foundArticle)  => {

            res.send(foundArticle);

        })

        .catch(function(err) {

            console.log(err);

        })

})

// It won't allow the contents of the database to be overwritten.

.put(function(req, res) {

    Article.replaceOne({ title: req.params.articleTitle },

        {

          title: req.body.title,

          content: req.body.content,

        })

        .then(() => {

            res.send("Successfully updated article.");

        })

        .catch(function(err) {

            console.log(err);

        })

})

app.listen(3000, function() {

    console.log("Server started on port 3000!");

});

{

    "_id" : ObjectId("6517a22854d8425f4e613d9e"),

    "title" : "REST",

    "content" : "REST is short for REpresentational State Transfer. It's an architectural style for designing APIs."

}

app.route("/articles/:articleTitle")

.put((req, res) => {

  const title = req.params.articleTitle;

  Article.updateOne({

    title

  }, {

    title: req.body.title,

    content: req.body.content,

  })

  .then(() => {

    res.send("Successfully updated article.");

  })

  .catch(function(err) {

    console.log(err);

  });

})