<?php
// api/rumah_ibadah.php
// CRUD API untuk Rumah Ibadah

require_once __DIR__ . '/../includes/config.php';

header('Content-Type: application/json; charset=utf-8');
header('Access-Control-Allow-Origin: *');
header('Access-Control-Allow-Methods: GET, POST, PUT, DELETE, OPTIONS');
header('Access-Control-Allow-Headers: Content-Type');

if ($_SERVER['REQUEST_METHOD'] === 'OPTIONS') exit;

$method = $_SERVER['REQUEST_METHOD'];
$db = getDB();

switch ($method) {

    // ── GET semua rumah ibadah + summary penduduk
    case 'GET':
        $id = $_GET['id'] ?? null;

        if ($id) {
            $stmt = $db->prepare("
                SELECT ri.*,
                    COUNT(pm.id) as jumlah_kk,
                    COALESCE(SUM(pm.jumlah_anggota), 0) as total_jiwa
                FROM rumah_ibadah ri
                LEFT JOIN penduduk_miskin pm ON pm.rumah_ibadah_id = ri.id
                WHERE ri.id = ?
                GROUP BY ri.id
            ");
            $stmt->execute([$id]);
            $row = $stmt->fetch();
            if ($row) jsonResponse(['success' => true, 'data' => $row]);
            else jsonResponse(['success' => false, 'error' => 'Not found'], 404);
        }

        $rows = $db->query("
            SELECT ri.*,
                COUNT(pm.id) as jumlah_kk,
                COALESCE(SUM(pm.jumlah_anggota), 0) as total_jiwa
            FROM rumah_ibadah ri
            LEFT JOIN penduduk_miskin pm ON pm.rumah_ibadah_id = ri.id
            GROUP BY ri.id
            ORDER BY ri.nama ASC
        ")->fetchAll();
        jsonResponse(['success' => true, 'data' => $rows]);
        break;

    // ── POST buat rumah ibadah baru
    case 'POST':
        $input = getInput();
        $required = ['nama', 'lat', 'lng'];
        foreach ($required as $field) {
            if (empty($input[$field])) {
                jsonResponse(['success' => false, 'error' => "Field '$field' wajib diisi"], 400);
            }
        }

        $stmt = $db->prepare("
            INSERT INTO rumah_ibadah (nama, jenis, alamat, pic, no_wa, lat, lng, radius)
            VALUES (?, ?, ?, ?, ?, ?, ?, ?)
        ");
        $stmt->execute([
            trim($input['nama']),
            $input['jenis'] ?? 'masjid',
            $input['alamat'] ?? '',
            $input['pic'] ?? '',
            $input['no_wa'] ?? '',
            (float)$input['lat'],
            (float)$input['lng'],
            (int)($input['radius'] ?? 500),
        ]);

        $newId = (int)$db->lastInsertId();
        reassignAll();

        $stmt2 = $db->prepare("SELECT * FROM rumah_ibadah WHERE id = ?");
        $stmt2->execute([$newId]);
        jsonResponse(['success' => true, 'data' => $stmt2->fetch(), 'message' => 'Rumah ibadah berhasil ditambahkan']);
        break;

    // ── PUT update rumah ibadah
    case 'PUT':
        $input = getInput();
        $id = $input['id'] ?? $_GET['id'] ?? null;
        if (!$id) jsonResponse(['success' => false, 'error' => 'ID diperlukan'], 400);

        $fields = [];
        $values = [];
        $allowed = ['nama', 'jenis', 'alamat', 'pic', 'no_wa', 'lat', 'lng', 'radius'];
        foreach ($allowed as $f) {
            if (isset($input[$f])) {
                $fields[] = "$f = ?";
                $values[] = ($f === 'lat' || $f === 'lng') ? (float)$input[$f] :
                            ($f === 'radius' ? (int)$input[$f] : trim($input[$f]));
            }
        }
        if (empty($fields)) jsonResponse(['success' => false, 'error' => 'Tidak ada data yang diupdate'], 400);

        $values[] = $id;
        $db->prepare("UPDATE rumah_ibadah SET " . implode(', ', $fields) . " WHERE id = ?")->execute($values);
        
        // Radius berubah → reassign semua
        if (isset($input['radius']) || isset($input['lat']) || isset($input['lng'])) {
            reassignAll();
        }

        $stmt = $db->prepare("SELECT * FROM rumah_ibadah WHERE id = ?");
        $stmt->execute([$id]);
        jsonResponse(['success' => true, 'data' => $stmt->fetch(), 'message' => 'Berhasil diupdate']);
        break;

    // ── DELETE hapus rumah ibadah
    case 'DELETE':
        $id = $_GET['id'] ?? getInput()['id'] ?? null;
        if (!$id) jsonResponse(['success' => false, 'error' => 'ID diperlukan'], 400);

        // Lepas referensi penduduk
        $db->prepare("UPDATE penduduk_miskin SET rumah_ibadah_id = NULL, jarak_ke_ibadah = NULL WHERE rumah_ibadah_id = ?")
           ->execute([$id]);
        $db->prepare("DELETE FROM rumah_ibadah WHERE id = ?")->execute([$id]);
        
        reassignAll();
        jsonResponse(['success' => true, 'message' => 'Berhasil dihapus']);
        break;

    default:
        jsonResponse(['success' => false, 'error' => 'Method tidak diizinkan'], 405);
}