<?php

use App\Enumerators\SessionElement;
use App\Wrappers\DatabaseInteractions;
use App\Wrappers\SessionWrapper;
use App\Wrappers\SQLQueryBuilderWrapper;

require_once __DIR__ . "/../../../vendor/autoload.php";

if(!SessionWrapper::Get(target: SessionElement::IS_LOGGED_IN))
{
    die();
}

$ratingValue = 0;
if($_GET['type'] == "LIKE")
    $ratingValue = 1;
elseif($_GET['type'] == "DISLIKE")
    $ratingValue = -1;
else
    die();

$db = new DatabaseInteractions();

$tuneDetails = $db->RunOneSelect(
    queryBuilder: SQLQueryBuilderWrapper::SELECT_ONE(
        table: 'Tunes',
        id: $_GET['tune-id']
    )
);

$existingRating = $db->RunSelect(
    queryBuilder: SQLQueryBuilderWrapper::SELECT(
        table: 'TuneRatings',
    )
        ->where(cond: 'CreatedBy=:__user_id__')
        ->where(cond: 'TuneID=:__tune_id__')
        ->bindValue(name: '__user_id__', value: SessionWrapper::Get(target: SessionElement::USER_ID))
        ->bindValue(name: '__tune_id__', value: $_GET['tune-id'])
);

if(sizeof($existingRating) == 0)
{
    $db->RunInsert(
        queryBuilder: SQLQueryBuilderWrapper::INSERT(
            table: 'TuneRatings'
        )
            ->set(col: 'CreatedBy', value: ':__user_id__')
            ->set(col: 'TuneID', value: ':__tune_id__')
            ->set(col: 'Rating', value: ':__rating__')
            ->bindValue(name: '__user_id__', value: SessionWrapper::Get(target: SessionElement::USER_ID))
            ->bindValue(name: '__tune_id__', value: $_GET['tune-id'])
            ->bindValue(name: '__rating__', value: $ratingValue)
    );
}
elseif(sizeof($existingRating) == 1)
{
    $db->RunUpdate(
        queryBuilder: SQLQueryBuilderWrapper::UPDATE(
            table: 'TuneRatings'
        )
            ->set(col: 'Rating', value: ':__rating__')
            ->where(cond: 'CreatedBy=:__user_id__')
            ->where(cond: 'TuneID=:__tune_id__')
            ->bindValue(name: '__user_id__', value: SessionWrapper::Get(target: SessionElement::USER_ID))
            ->bindValue(name: '__tune_id__', value: $_GET['tune-id'])
            ->bindValue(name: '__rating__', value: $ratingValue)
    );
}

$tuneRatings = $db->RunSelect(
    queryBuilder: SQLQueryBuilderWrapper::SELECT(
        table: 'TuneRatings',
    )
        ->cols(cols: [
            'SUM(CASE WHEN T.Rating = 1 THEN 1 ELSE 0 END) AS Likes',
            'SUM(CASE WHEN T.Rating = -1 THEN 1 ELSE 0 END) AS Dislikes',
        ])
        ->where(cond: 'TuneID=:__tune_id__')
        ->bindValue(name: '__tune_id__', value: $_GET['tune-id'])
);

echo json_encode([
    "LikeCount" => $tuneRatings[0]["Likes"],
    "DislikeCount" => $tuneRatings[0]["Dislikes"],
]);

die();