<?php
header('Content-Type: application/json; charset=utf-8');

// Home Assistant 설정
$HA_URL   = "https://ha.seoul.chaegeon.com/api";   // 또는 http://IP:8123/api
$HA_TOKEN = "REDACTED_HA_TOKEN";         // HA 장기 토큰
$ENTITY   = "switch.keompyuteo";                      // 제어할 스위치 엔티티명

function haRequest($method, $endpoint, $data = null) {
    global $HA_URL, $HA_TOKEN;

    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $HA_URL . $endpoint);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_CUSTOMREQUEST, strtoupper($method));

    $headers = [
        "Authorization: Bearer $HA_TOKEN",
        "Content-Type: application/json"
    ];
    curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);

    if ($data) {
        curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($data));
    }

    $response = curl_exec($ch);
    curl_close($ch);

    return json_decode($response, true);
}

/*
--------------------------------------------
 1) 상태 확인 요청 (/api.php?status=1)
--------------------------------------------
*/
if (isset($_GET['status'])) {
    $state = haRequest("GET", "/states/$ENTITY");

    if (!$state || !isset($state["state"])) {
        echo json_encode(["result" => "error"]);
        exit;
    }

    echo json_encode([
        "result" => "ok",
        "state"  => $state["state"]   // "on" or "off"
    ]);
    exit;
}

/*
--------------------------------------------
 2) 스위치 켜기 요청 (POST)
--------------------------------------------
*/
if ($_SERVER["REQUEST_METHOD"] === "POST") {
    $res = haRequest("POST", "/services/switch/turn_on", [
        "entity_id" => $ENTITY
    ]);

    echo json_encode(["result" => "sent"]);
    exit;
}

echo json_encode(["result" => "invalid_request"]);