const db = require('../surreal');
const router = require('express').Router();

router.get('/', async (req, res) => {
    try{
        const homepage = await db.query(`SELECT * FROM homepage`);

        if(homepage.length == 0) return res.status(400).json({error: "Homepage does not exist"});

        const trending = homepage[0].trending;
        const mostLiked = homepage[0].mostLiked;
        const mostCommented = homepage[0].mostCommented;
        const mostSaved = homepage[0].mostSaved;

        const returnData = {
            trending: trending,
            mostLiked: mostLiked,
            mostCommented: mostCommented,
            mostSaved: mostSaved
        }

        res.status(200).json({returnData});
    }
    catch(err){
        console.log(err);
        res.status(500).json({error: "Internal server error"});
    }
});

router.get('/trending', async (req, res) => {
    try{
        const homepage = await db.query(`SELECT * FROM homepage`);

        if(homepage.length == 0) return res.status(400).json({error: "Homepage does not exist"});

        const trending = homepage[0].trending;

        res.status(200).json({trending});
    }
    catch(err){
        console.log(err);
        res.status(500).json({error: "Internal server error"});
    }
});

router.get('/mostLiked', async (req, res) => {
    try{
        const homepage = await db.query(`SELECT * FROM homepage`);

        if(homepage.length == 0) return res.status(400).json({error: "Homepage does not exist"});

        const mostLiked = homepage[0].mostLiked;

        res.status(200).json({mostLiked});
    }
    catch(err){
        console.log(err);
        res.status(500).json({error: "Internal server error"});
    }
});

router.get('/mostCommented', async (req, res) => {
    try{
        const homepage = await db.query(`SELECT * FROM homepage`);

        if(homepage.length == 0) return res.status(400).json({error: "Homepage does not exist"});

        const mostCommented = homepage[0].mostCommented;

        res.status(200).json({mostCommented});
    }
    catch(err){
        console.log(err);
        res.status(500).json({error: "Internal server error"});
    }
});

router.get('/mostSaved', async (req, res) => {
    try{
        const homepage = await db.query(`SELECT * FROM homepage`);

        if(homepage.length == 0) return res.status(400).json({error: "Homepage does not exist"});

        const mostSaved = homepage[0].mostSaved;

        res.status(200).json({mostSaved});
    }
    catch(err){
        console.log(err);
        res.status(500).json({error: "Internal server error"});
    }
});

router.get('/categories', async (req, res) => {
    try{
        const categories = await db.query(`SELECT name, description, count(posts) AS count FROM category`);

        if(categories.length == 0) return res.status(400).json({error: "Categories do not exist"});

        res.status(200).json({categories});
    }
    catch(err){
        console.log(err);
        res.status(500).json({error: "Internal server error"});
    }
});

router.get('/category/:name/', async (req, res) => {
    try{
        const name = req.params.name;

        const category = await db.query(`SELECT posts FROM category WHERE name = string::lowercase("${name}")`);
        //reverse the array so the latest posts are first
        category[0].posts.reverse();

        if(category.length == 0) return res.status(400).json({error: "Category does not exist"});

        postarray = []

        //select woth the id
        for(const id of category[0].posts){
            const post = await db.query(`SELECT title, date, viewcount, id, author FROM posts WHERE id = "posts:${id}"`);
            //remopve posts: from the id
            post[0].id = post[0].id.split(":")[1];
            postarray.push(post[0]);
        }

        res.status(200).json({postarray});
    }
    catch(err){
        console.log(err);
        res.status(500).json({error: "Internal server error"});
    }
});

router.get('/category/details/:name/', async (req, res) => {
    try{
        const name = req.params.name;

        const category = await db.query(`SELECT description FROM category WHERE name = string::lowercase("${name}")`);

        if(category.length == 0) return res.status(400).json({error: "Category does not exist"});

        res.status(200).json({description: category[0].description});
    }
    catch(err){
        console.log(err);
        res.status(500).json({error: "Internal server error"});
    }
});

module.exports = router;