<?php
// api/laporan.php — Pelaporan Warga oleh Kontributor & Koordinator
header('Content-Type: application/json');
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') { http_response_code(204); exit; }

require_once '../config/db.php';
require_once 'middleware.php';

$method = $_SERVER['REQUEST_METHOD'];
if ($method === 'POST' && isset($_POST['_method'])) {
    $method = strtoupper($_POST['_method']);
}
$action = $_GET['action'] ?? '';

try {
    switch ($method) {

        // ── GET: List laporan ──────────────────────────────────────────────────
        case 'GET':
            $currentUser = requireAuth(['admin', 'petugas', 'koordinator', 'kontributor']);
            $role = $currentUser['role'];
            $userId = (int)$currentUser['id'];

            // Jika ada action=stats untuk admin dashboard
            if ($action === 'stats') {
                if (!in_array($role, ['admin', 'petugas'])) {
                    http_response_code(403);
                    echo json_encode(['success' => false, 'message' => 'Forbidden']);
                    exit;
                }
                $stmtStats = $pdo->query("
                    SELECT status, COUNT(*) as jumlah
                    FROM laporan_warga
                    GROUP BY status
                ");
                $stats = [];
                while ($r = $stmtStats->fetch(PDO::FETCH_ASSOC)) {
                    $stats[$r['status']] = (int)$r['jumlah'];
                }
                $stmtTotal = $pdo->query("SELECT COUNT(*) FROM laporan_warga");
                echo json_encode(['success' => true, 'stats' => $stats, 'total' => (int)$stmtTotal->fetchColumn()]);
                exit;
            }

            // Filter berdasarkan role
            $where = [];
            $params = [];

            // Jika ada action=get_petugas
            if ($action === 'get_petugas') {
                if (!in_array($role, ['admin', 'petugas'])) {
                    http_response_code(403); echo json_encode(['success' => false, 'message' => 'Forbidden']); exit;
                }
                $stmt = $pdo->query("SELECT username FROM users WHERE role = 'petugas' ORDER BY username ASC");
                $petugas = $stmt->fetchAll(PDO::FETCH_COLUMN);
                echo json_encode(['success' => true, 'petugas' => $petugas]);
                exit;
            }

            if ($role === 'kontributor') {
                // Kontributor hanya lihat laporan milik sendiri
                $where[] = 'lw.pelapor_id = ?';
                $params[] = $userId;
            } elseif ($role === 'koordinator') {
                // Koordinator lihat laporan dari wilayahnya + laporan milik sendiri
                $where[] = '(lw.pelapor_id = ? OR lw.koordinator_ibadah_id = ?)';
                $params[] = $userId;
                $params[] = !empty($currentUser['rumah_ibadah_id']) ? (int)$currentUser['rumah_ibadah_id'] : 0;
            } elseif ($role === 'petugas') {
                // Petugas hanya lihat laporan yang ditugaskan ke mereka
                $where[] = 'lw.ditugaskan_ke = ?';
                $params[] = $currentUser['username'];
            }
            // Admin: lihat semua

            // Filter status
            if (!empty($_GET['status'])) {
                $where[] = 'lw.status = ?';
                $params[] = $_GET['status'];
            }

            // Filter prioritas
            if (!empty($_GET['prioritas'])) {
                $where[] = 'lw.prioritas = ?';
                $params[] = $_GET['prioritas'];
            }

            $whereSql = $where ? 'WHERE ' . implode(' AND ', $where) : '';

            $sql = "
                SELECT
                    lw.*,
                    rw.nama_kepala_keluarga,
                    rw.kelurahan,
                    rw.kecamatan,
                    rw.kategori_kemiskinan,
                    rw.status_bantuan,
                    u.username AS pelapor_nama,
                    u.role AS pelapor_role
                FROM laporan_warga lw
                JOIN rumah_warga rw ON rw.id = lw.rumah_warga_id
                JOIN users u ON u.id = lw.pelapor_id
                $whereSql
                ORDER BY lw.created_at DESC
                LIMIT 100
            ";

            $stmt = $pdo->prepare($sql);
            $stmt->execute($params);
            $data = $stmt->fetchAll(PDO::FETCH_ASSOC);

            // Summary counts for filter badges
            $stmtSummary = $pdo->query("SELECT status, COUNT(*) as n FROM laporan_warga GROUP BY status");
            $summary = [];
            while ($r = $stmtSummary->fetch(PDO::FETCH_ASSOC)) {
                $summary[$r['status']] = (int)$r['n'];
            }

            $response = ['success' => true, 'data' => $data, 'summary' => $summary, 'total' => count($data)];
            
            // Sertakan list petugas jika user admin
            if ($role === 'admin' || $role === 'petugas') {
                $stmtP = $pdo->query("SELECT username FROM users WHERE role = 'petugas' ORDER BY username ASC");
                $response['petugas'] = $stmtP->fetchAll(PDO::FETCH_COLUMN);
            }

            echo json_encode($response);
            break;

        // ── POST: Buat laporan baru ──────────────────────────────────────────
        case 'POST':
            $currentUser = requireAuth(['koordinator', 'kontributor']);
            
            $input = json_decode(file_get_contents('php://input'), true) ?: $_POST;

            $rumahWargaId   = (int)($input['rumah_warga_id'] ?? 0);
            $jenisLaporan   = trim($input['jenis_laporan'] ?? '');
            $deskripsi      = trim($input['deskripsi'] ?? '');
            
            // Penentuan prioritas otomatis berdasarkan jenis laporan
            $prioritasMap = [
                'warga_meninggal' => 'tinggi',
                'warga_pindah'    => 'tinggi',
                'warga_mampu'     => 'tinggi',
                'data_ganda'      => 'sedang',
                'data_tidak_sesuai'=> 'sedang',
                'lainnya'         => 'rendah'
            ];
            $prioritas = $prioritasMap[$jenisLaporan] ?? 'sedang';

            if (!$rumahWargaId || !$jenisLaporan || !$deskripsi) {
                http_response_code(400);
                echo json_encode(['success' => false, 'message' => 'Data tidak lengkap: rumah_warga_id, jenis_laporan, dan deskripsi wajib diisi.']);
                exit;
            }

            // Cek warga ada
            $stmtCek = $pdo->prepare("SELECT id, nama_kepala_keluarga FROM rumah_warga WHERE id = ?");
            $stmtCek->execute([$rumahWargaId]);
            $warga = $stmtCek->fetch();
            if (!$warga) {
                http_response_code(404);
                echo json_encode(['success' => false, 'message' => 'Data warga tidak ditemukan.']);
                exit;
            }

            // Cek apakah laporan duplikat dalam 7 hari terakhir
            $stmtDupCheck = $pdo->prepare("
                SELECT id FROM laporan_warga
                WHERE rumah_warga_id = ? AND pelapor_id = ?
                AND status NOT IN ('selesai', 'ditolak')
                AND created_at >= DATE_SUB(NOW(), INTERVAL 7 DAY)
            ");
            $stmtDupCheck->execute([$rumahWargaId, $currentUser['id']]);
            if ($stmtDupCheck->fetch()) {
                http_response_code(409);
                echo json_encode(['success' => false, 'message' => 'Anda sudah membuat laporan untuk warga ini dalam 7 hari terakhir. Harap tunggu laporan sebelumnya diproses.']);
                exit;
            }

            $koordinatorIbadahId = !empty($currentUser['rumah_ibadah_id']) ? (int)$currentUser['rumah_ibadah_id'] : null;

            $stmtInsert = $pdo->prepare("
                INSERT INTO laporan_warga
                    (rumah_warga_id, pelapor_id, koordinator_ibadah_id, jenis_laporan, deskripsi, prioritas, status)
                VALUES (?, ?, ?, ?, ?, ?, 'pending')
            ");
            $stmtInsert->execute([
                $rumahWargaId,
                $currentUser['id'],
                $koordinatorIbadahId,
                $jenisLaporan,
                $deskripsi,
                $prioritas,
            ]);

            echo json_encode([
                'success' => true,
                'message' => 'Laporan berhasil dikirim. Admin akan meninjau laporan Anda segera.',
                'id' => $pdo->lastInsertId()
            ]);
            break;

        case 'PUT':
            $currentUser = requireAuth(['admin', 'petugas']);
            $input = json_decode(file_get_contents('php://input'), true);
            if (!$input) $input = $_POST;

            $id             = (int)($input['id'] ?? 0);
            $status         = $input['status'] ?? '';
            $catatanAdmin   = trim($input['catatan_admin'] ?? '');
            $ditugaskanKe   = trim($input['ditugaskan_ke'] ?? '');
            
            // Ambil dari old state
            $stmtDok = $pdo->prepare("SELECT dokumentasi FROM laporan_warga WHERE id = ?");
            $stmtDok->execute([$id]);
            $oldDok = $stmtDok->fetchColumn();
            
            $dokumentasi = trim($input['dokumentasi'] ?? $oldDok ?? '');
            
            // Handle file upload
            if (isset($_FILES['dokumentasi_file']) && $_FILES['dokumentasi_file']['error'] === UPLOAD_ERR_OK) {
                $uploadDir = '../uploads/dokumentasi/';
                if (!is_dir($uploadDir)) {
                    mkdir($uploadDir, 0755, true);
                }
                $ext = strtolower(pathinfo($_FILES['dokumentasi_file']['name'], PATHINFO_EXTENSION));
                $allowedExts = ['jpg', 'jpeg', 'png', 'pdf'];
                if (in_array($ext, $allowedExts)) {
                    $filename = 'dok_' . $id . '_' . time() . '.' . $ext;
                    $dest = $uploadDir . $filename;
                    if (move_uploaded_file($_FILES['dokumentasi_file']['tmp_name'], $dest)) {
                        $dokumentasi = 'uploads/dokumentasi/' . $filename;
                    }
                }
            }

            $allowedStatus = ['pending', 'ditinjau', 'diproses', 'selesai', 'ditolak'];
            if (!$id || !in_array($status, $allowedStatus)) {
                http_response_code(400);
                echo json_encode(['success' => false, 'message' => 'ID dan status valid wajib diisi.']);
                exit;
            }

            // Jika petugas, pastikan hanya bisa update dokumentasi, status, catatan. (ditugaskan_ke biarkan tetap)
            if ($currentUser['role'] === 'petugas') {
                $stmt = $pdo->prepare("
                    UPDATE laporan_warga
                    SET status = ?, catatan_admin = ?, dokumentasi = ?, updated_at = NOW()
                    WHERE id = ? AND ditugaskan_ke = ?
                ");
                $stmt->execute([$status, $catatanAdmin, $dokumentasi, $id, $currentUser['username']]);
            } else {
                // Admin bisa update semua
                $stmt = $pdo->prepare("
                    UPDATE laporan_warga
                    SET status = ?, catatan_admin = ?, ditugaskan_ke = ?, dokumentasi = ?, updated_at = NOW()
                    WHERE id = ?
                ");
                $stmt->execute([$status, $catatanAdmin, $ditugaskanKe ?: null, $dokumentasi, $id]);
            }

            $statusLabel = [
                'pending'   => 'Menunggu',
                'ditinjau'  => 'Sedang Ditinjau',
                'diproses'  => 'Sedang Diproses',
                'selesai'   => 'Selesai',
                'ditolak'   => 'Ditolak',
            ];

            echo json_encode([
                'success' => true,
                'message' => 'Laporan berhasil diperbarui ke status: ' . ($statusLabel[$status] ?? $status)
            ]);
            break;

        // ── DELETE: Hapus laporan (admin only) ──────────────────────────────
        case 'DELETE':
            $currentUser = requireAuth(['admin']);
            $id = (int)($_GET['id'] ?? 0);
            if (!$id) {
                $input = json_decode(file_get_contents('php://input'), true);
                $id = (int)($input['id'] ?? 0);
            }
            if (!$id) {
                http_response_code(400);
                echo json_encode(['success' => false, 'message' => 'ID laporan wajib diisi.']);
                exit;
            }
            $stmt = $pdo->prepare("DELETE FROM laporan_warga WHERE id = ?");
            $stmt->execute([$id]);
            echo json_encode(['success' => true, 'message' => 'Laporan berhasil dihapus.']);
            break;

        default:
            http_response_code(405);
            echo json_encode(['error' => 'Method not allowed']);
    }
} catch (Exception $e) {
    http_response_code(500);
    echo json_encode(['success' => false, 'message' => 'Kesalahan sistem: ' . $e->getMessage()]);
}