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

function getZodiacSign($month, $day) {
    $signs = [
        ['name' => "摩羯座", 'start' => [12, 22], 'end' => [1, 19]],
        ['name' => "水瓶座", 'start' => [1, 20], 'end' => [2, 18]],
        ['name' => "双鱼座", 'start' => [2, 19], 'end' => [3, 20]],
        ['name' => "白羊座", 'start' => [3, 21], 'end' => [4, 19]],
        ['name' => "金牛座", 'start' => [4, 20], 'end' => [5, 20]],
        ['name' => "双子座", 'start' => [5, 21], 'end' => [6, 20]],
        ['name' => "巨蟹座", 'start' => [6, 21], 'end' => [7, 22]],
        ['name' => "狮子座", 'start' => [7, 23], 'end' => [8, 22]],
        ['name' => "处女座", 'start' => [8, 23], 'end' => [9, 22]],
        ['name' => "天秤座", 'start' => [9, 23], 'end' => [10, 22]],
        ['name' => "天蝎座", 'start' => [10, 23], 'end' => [11, 21]],
        ['name' => "射手座", 'start' => [11, 22], 'end' => [12, 21]]
    ];

    foreach ($signs as $sign) {
        if (
            ($month == $sign['start'][0] && $day >= $sign['start'][1]) ||
            ($month == $sign['end'][0] && $day <= $sign['end'][1])
        ) {
            return $sign['name'];
        }
    }
    return "未知";
}

function getChineseZodiac($year) {
    $animals = ["鼠", "牛", "虎", "兔", "龙", "蛇", "马", "羊", "猴", "鸡", "狗", "猪"];
    return $animals[($year - 4) % 12];
}

if ($_SERVER['REQUEST_METHOD'] === 'POST' && isset($_POST['birthdate'])) {
    $birthdate = new DateTime($_POST['birthdate']);
    $year = (int)$birthdate->format('Y');
    $month = (int)$birthdate->format('n');
    $day = (int)$birthdate->format('j');

    $zodiac = getZodiacSign($month, $day);
    $chineseZodiac = getChineseZodiac($year);

    echo json_encode([
        'zodiac' => $zodiac,
        'chineseZodiac' => $chineseZodiac
    ]);
} else {
    echo json_encode(['error' => '无效的请求']);
}