<?php
require_once '_inc.php';

header('Content-Type: application/json; charset=utf-8');

$output = [];

$hideOwnershipInfo = !empty($_GET['h']);

switch(filter_input(INPUT_GET, 't')) {
    case 'systems':
        $getSystems = $pdo->prepare(sprintf(
            '
                SELECT s.*, (
                    SELECT COUNT(`game_id`)
                    FROM `col_games`
                    WHERE `sys_id` = s.`sys_id`
                ) AS `sys_games`%s
                FROM `col_systems` AS s
            ',
            $hideOwnershipInfo
                ? ''
                : ',
                (
                    SELECT COUNT(`game_id`)
                    FROM `col_games_ownership`
                    WHERE `game_id` IN (
                        SELECT `game_id`
                        FROM `col_games`
                        WHERE `sys_id` = s.`sys_id`
                    )
                ) AS `sys_games_owned`'
        ));
        $getSystems->execute();
        $output = $getSystems->fetchAll(PDO::FETCH_ASSOC);
        break;

    case 'games':
        $sysId = filter_input(INPUT_GET, 'sys', FILTER_SANITIZE_NUMBER_INT);
        $showAllGames = $sysId === null;
        $getGames = $pdo->prepare(sprintf(
            '
                SELECT g.*%s
                FROM `col_games` AS g
                %s
            ',
            $hideOwnershipInfo
                ? ''
                : ', (
                    SELECT COUNT(`game_id`) > 0
                    FROM `col_games_ownership`
                    WHERE `game_id` = g.`game_id`
                ) AS `game_owned`',
            $showAllGames ? '' : 'WHERE `sys_id` = :sys'
        ));
        if(!$showAllGames)
            $getGames->bindValue('sys', $sysId);
        $getGames->execute();
        $output = $getGames->fetchAll(PDO::FETCH_ASSOC);
        break;
}

echo json_encode($output);