<?php
header('Content-Type: application/json; charset=utf8');

$koneksi = mysqli_connect("103.163.103.117:9306", "pdam", "pdamwng1", "pdam_web");

if ($_SERVER['REQUEST_METHOD'] === 'GET'){
    $sql = "SELECT 
    DATE(created_at) AS tanggal,
    MAX(distance) AS nilai_tertinggi,
    MIN(distance) AS nilai_terendah
FROM 
    pdam_web.sensor_data
WHERE 
    device_name = 'Gandul'
    AND created_at >= CURDATE() - INTERVAL 7 DAY
GROUP BY 
    DATE(created_at)
ORDER BY 
    tanggal ASC;
";
    $query = mysqli_query($koneksi, $sql);
    $array_data = array();
    while ($data = mysqli_fetch_assoc($query))
    $array_data[] = $data;
}
echo json_encode($array_data);