<?php
// api/foto.php v2.0
// ============================================================
// API Upload & Kelola Foto Rumah + GPS Geo-tagging
// ============================================================
require_once __DIR__ . '/../includes/config.php';

header('Access-Control-Allow-Origin: *');
header('Access-Control-Allow-Methods: GET, POST, DELETE, OPTIONS');
header('Access-Control-Allow-Headers: Content-Type');
if ($_SERVER['REQUEST_METHOD'] === 'OPTIONS') exit;

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

// Pastikan folder upload ada
if (!is_dir(UPLOAD_DIR)) mkdir(UPLOAD_DIR, 0755, true);

switch ($method) {

    // ════════════════════════════════════════════════════════
    // GET – Ambil daftar foto per penduduk
    // ════════════════════════════════════════════════════════
    case 'GET':
        $pendudukId = $_GET['penduduk_id'] ?? null;
        if (!$pendudukId) {
            header('Content-Type: application/json');
            jsonResponse(['success' => false, 'error' => 'penduduk_id diperlukan'], 400);
        }
        $stmt = $db->prepare("
            SELECT f.*, u.nama AS nama_petugas
            FROM foto_rumah f
            LEFT JOIN users u ON u.id = f.diambil_oleh
            WHERE f.penduduk_id = ?
            ORDER BY f.is_primary DESC, f.created_at ASC
        ");
        $stmt->execute([$pendudukId]);
        header('Content-Type: application/json');
        jsonResponse(['success' => true, 'data' => $stmt->fetchAll()]);
        break;

    // ════════════════════════════════════════════════════════
    // POST – Upload foto baru
    // ════════════════════════════════════════════════════════
    case 'POST':
        header('Content-Type: application/json');
        $pendudukId = (int)($_POST['penduduk_id'] ?? 0);
        if (!$pendudukId) jsonResponse(['success' => false, 'error' => 'penduduk_id diperlukan'], 400);

        // Cek penduduk ada
        $cek = $db->prepare("SELECT id FROM penduduk_miskin WHERE id = ?");
        $cek->execute([$pendudukId]);
        if (!$cek->fetch()) jsonResponse(['success' => false, 'error' => 'Data penduduk tidak ditemukan'], 404);

        if (!isset($_FILES['foto']) || $_FILES['foto']['error'] !== UPLOAD_ERR_OK) {
            $errCode = $_FILES['foto']['error'] ?? 'no_file';
            jsonResponse(['success' => false, 'error' => "Upload gagal (kode: $errCode)"], 400);
        }

        $file     = $_FILES['foto'];
        $tmpPath  = $file['tmp_name'];
        $origName = $file['name'];
        $fileSize = $file['size'];

        // Validasi ukuran
        if ($fileSize > MAX_FOTO_SIZE) {
            jsonResponse(['success' => false, 'error' => 'Ukuran file maksimal 5 MB'], 413);
        }

        // Validasi ekstensi & MIME type
        $ext     = strtolower(pathinfo($origName, PATHINFO_EXTENSION));
        $finfo   = finfo_open(FILEINFO_MIME_TYPE);
        $mime    = finfo_file($finfo, $tmpPath);
        finfo_close($finfo);
        $allowedMime = ['image/jpeg','image/png','image/webp'];
        if (!in_array($ext, ALLOWED_EXT) || !in_array($mime, $allowedMime)) {
            jsonResponse(['success' => false, 'error' => 'Format file tidak didukung (jpg/png/webp)'], 415);
        }

        // Generate nama file unik
        $newName  = 'foto_' . $pendudukId . '_' . time() . '_' . bin2hex(random_bytes(4)) . '.' . $ext;
        $destPath = UPLOAD_DIR . $newName;
        $relPath  = UPLOAD_URL . $newName;

        if (!move_uploaded_file($tmpPath, $destPath)) {
            jsonResponse(['success' => false, 'error' => 'Gagal menyimpan file'], 500);
        }

        // Cek apakah ini foto pertama → jadikan primary
        $countStmt = $db->prepare("SELECT COUNT(*) FROM foto_rumah WHERE penduduk_id = ?");
        $countStmt->execute([$pendudukId]);
        $isPrimary = ($countStmt->fetchColumn() == 0) ? 1 : 0;

        // Koordinat GPS dari POST (dari browser Geolocation atau EXIF)
        $latFoto  = isset($_POST['lat_foto'])  && $_POST['lat_foto']  !== '' ? (float)$_POST['lat_foto']  : null;
        $lngFoto  = isset($_POST['lng_foto'])  && $_POST['lng_foto']  !== '' ? (float)$_POST['lng_foto']  : null;
        $accuracy = isset($_POST['accuracy_meter']) && $_POST['accuracy_meter'] !== '' ? (float)$_POST['accuracy_meter']
                  : (isset($_POST['accuracy']) && $_POST['accuracy'] !== '' ? (float)$_POST['accuracy'] : null);

        // Jika user set is_primary = 1, nonaktifkan primary lain dulu
        $isPrimaryReq = isset($_POST['is_primary']) && (int)$_POST['is_primary'] === 1;
        if ($isPrimaryReq) {
            $db->prepare("UPDATE foto_rumah SET is_primary = 0 WHERE penduduk_id = ?")
               ->execute([$pendudukId]);
            $isPrimary = 1;
        }

        // diambil_oleh: support field name lama (user_id) dan baru (diambil_oleh)
        $diambilOleh = $_POST['diambil_oleh'] ?? $_POST['user_id'] ?? null;

        $db->prepare("
            INSERT INTO foto_rumah (penduduk_id, file_path, lat_foto, lng_foto, accuracy_meter, is_primary, ukuran_kb, keterangan, diambil_oleh)
            VALUES (?,?,?,?,?,?,?,?,?)
        ")->execute([
            $pendudukId,
            $relPath,
            $latFoto,
            $lngFoto,
            $accuracy,
            $isPrimary,
            (int)round($fileSize / 1024),
            $_POST['keterangan'] ?? null,
            $diambilOleh ? (int)$diambilOleh : null,
        ]);

        $newId = (int)$db->lastInsertId();
        jsonResponse([
            'success'   => true,
            'id'        => $newId,
            'file_path' => $relPath,
            'is_primary'=> $isPrimary,
            'message'   => 'Foto berhasil diupload',
        ]);
        break;

    // ════════════════════════════════════════════════════════
    // DELETE – Hapus foto
    // ════════════════════════════════════════════════════════
    case 'DELETE':
        header('Content-Type: application/json');
        $id = (int)($_GET['id'] ?? 0);
        if (!$id) jsonResponse(['success' => false, 'error' => 'ID diperlukan'], 400);

        $stmt = $db->prepare("SELECT * FROM foto_rumah WHERE id = ?");
        $stmt->execute([$id]);
        $foto = $stmt->fetch();
        if (!$foto) jsonResponse(['success' => false, 'error' => 'Foto tidak ditemukan'], 404);

        // Hapus file fisik
        $filePath = __DIR__ . '/../' . $foto['file_path'];
        if (file_exists($filePath)) @unlink($filePath);

        $db->prepare("DELETE FROM foto_rumah WHERE id = ?")->execute([$id]);

        // Jika foto yang dihapus adalah primary, set foto lain jadi primary
        if ($foto['is_primary']) {
            $next = $db->prepare("SELECT id FROM foto_rumah WHERE penduduk_id = ? ORDER BY created_at ASC LIMIT 1");
            $next->execute([$foto['penduduk_id']]);
            $nextFoto = $next->fetch();
            if ($nextFoto) {
                $db->prepare("UPDATE foto_rumah SET is_primary = 1 WHERE id = ?")->execute([$nextFoto['id']]);
            }
        }

        jsonResponse(['success' => true, 'message' => 'Foto berhasil dihapus']);
        break;

    default:
        header('Content-Type: application/json');
        jsonResponse(['success' => false, 'error' => 'Method tidak diizinkan'], 405);
}