<?php
    require_once __DIR__ . '/includes/db_connect.php';

    header('Content-Type: application/json');

	$stmt = $pdo->query("SELECT kk.id,
								vorderseite,
								rueckseite,
								farbe,
								name
							FROM karteikarte kk
							JOIN kategorie k ON k.id = kk.kategorie_id;");
	$karteikarten = $stmt->fetchAll(PDO::FETCH_ASSOC);

/*WITH zeile AS (
	SELECT d.id,
			d.wort,
			k.name,
			i.wort AS italienisch,
			i.farbe_id AS farbe,
			ROW_NUMBER() OVER (PARTITION BY d.wort ORDER BY i.id) AS rn
	FROM deutsch d
	JOIN italienisch i ON i.deutsch_id = d.id
	JOIN kategorie k ON k.id = d.kategorie_id
)
SELECT id,
		wort,
		name,
    	MAX(CASE WHEN rn = 1 THEN italienisch END) AS wort_1,
    	MAX(CASE WHEN rn = 1 THEN farbe END) AS farbe_1,
    	MAX(CASE WHEN rn = 2 THEN italienisch END) AS wort_2,
    	MAX(CASE WHEN rn = 2 THEN farbe END) AS farbe_2,
    	MAX(CASE WHEN rn = 3 THEN italienisch END) AS wort_3,
    	MAX(CASE WHEN rn = 3 THEN farbe END) AS farbe_3,
    	MAX(CASE WHEN rn = 4 THEN italienisch END) AS wort_4,
    	MAX(CASE WHEN rn = 4 THEN farbe END) AS farbe_4,
    	MAX(CASE WHEN rn = 5 THEN italienisch END) AS wort_5,
    	MAX(CASE WHEN rn = 5 THEN farbe END) AS farbe_5
FROM zeile
GROUP BY id, wort, name
ORDER BY wort;*/

	echo json_encode($karteikarten);