<?php

// Tangkap semua output PHP (termasuk error/warning) sebelum header dikirim
ob_start();

// Tampilkan semua error ke buffer, bukan langsung ke browser
ini_set('display_errors', 1);
error_reporting(E_ALL);

// Set header JSON di awal
header('Content-Type: application/json');

// Tangkap fatal error dan kembalikan sebagai JSON
register_shutdown_function(function () {
    $error = error_get_last();
    if ($error && in_array($error['type'], [E_ERROR, E_PARSE, E_CORE_ERROR, E_COMPILE_ERROR])) {
        ob_clean();
        echo json_encode([
            'success' => false,
            'message' => 'PHP Fatal Error: ' . $error['message'] . ' (line ' . $error['line'] . ')'
        ]);
    }
});

// Tangkap exception yang tidak tertangkap
set_exception_handler(function ($e) {
    ob_clean();
    echo json_encode([
        'success' => false,
        'message' => 'Exception: ' . $e->getMessage()
    ]);
    exit;
});

// Cek apakah config.php ada
if (!file_exists(__DIR__ . '/config.php')) {
    echo json_encode([
        'success' => false,
        'message' => 'File config.php tidak ditemukan di: ' . __DIR__
    ]);
    exit;
}

include 'config.php';

// Buang output apapun yang tidak sengaja tercetak sebelum JSON (misal warning PHP)
ob_clean();

$action = $_GET['action'] ?? '';

// ============================================================
// Helper Upload Foto
// ============================================================
function uploadFoto($fileKey)
{
    if (
        !isset($_FILES[$fileKey]) ||
        $_FILES[$fileKey]['error'] !== UPLOAD_ERR_OK
    ) {
        return null;
    }

    $uploadDir = 'uploads/';

    if (!is_dir($uploadDir)) {
        mkdir($uploadDir, 0777, true);
    }

    $ext = strtolower(pathinfo($_FILES[$fileKey]['name'], PATHINFO_EXTENSION));

    $allowed = ['jpg', 'jpeg', 'png', 'webp'];

    if (!in_array($ext, $allowed)) {
        return null;
    }

    $filename = uniqid('img_', true) . '.' . $ext;
    $destination = $uploadDir . $filename;

    if (move_uploaded_file($_FILES[$fileKey]['tmp_name'], $destination)) {
        return $filename;
    }

    return null;
}

// ============================================================
// GET DATA
// ============================================================
if ($action === 'get_data') {

    $roadsResult  = $conn->query("SELECT * FROM roads ORDER BY id DESC");
    $parcelsResult = $conn->query("SELECT * FROM parcels ORDER BY id DESC");
    $damagedResult = $conn->query("SELECT * FROM damaged_roads ORDER BY id DESC");

    if (!$roadsResult || !$parcelsResult || !$damagedResult) {
        echo json_encode([
            'success' => false,
            'message' => 'Query gagal: ' . $conn->error
        ]);
        exit;
    }

    $roads   = $roadsResult->fetch_all(MYSQLI_ASSOC);
    $parcels = $parcelsResult->fetch_all(MYSQLI_ASSOC);
    $damaged = $damagedResult->fetch_all(MYSQLI_ASSOC);

    foreach ($roads as &$row) {
        $row['foto_url'] = !empty($row['foto'])
            ? 'uploads/' . $row['foto']
            : null;
    }

    foreach ($parcels as &$row) {
        $row['foto_url'] = !empty($row['foto'])
            ? 'uploads/' . $row['foto']
            : null;
    }

    foreach ($damaged as &$row) {
        $row['foto_url'] = !empty($row['foto'])
            ? 'uploads/' . $row['foto']
            : null;
    }

    echo json_encode([
        'success' => true,
        'roads' => $roads,
        'parcels' => $parcels,
        'damaged_roads' => $damaged
    ]);

    exit;
}

// ============================================================
// SEARCH
// ============================================================
if ($action === 'search') {

    $keyword = $_GET['q'] ?? '';
    $keyword = $conn->real_escape_string($keyword);
    $like = "%{$keyword}%";

    $roadsSearch  = $conn->query("
        SELECT
            id,
            name,
            status,
            length_m AS measure,
            'road' AS type
        FROM roads
        WHERE name LIKE '$like'
           OR status LIKE '$like'
    ");

    $parcelsSearch = $conn->query("
        SELECT
            id,
            name,
            status,
            area_sqm AS measure,
            'parcel' AS type
        FROM parcels
        WHERE name LIKE '$like'
           OR status LIKE '$like'
    ");

    $damagedSearch = $conn->query("
        SELECT
            id,
            name,
            status,
            description AS measure,
            'damaged' AS type
        FROM damaged_roads
        WHERE name LIKE '$like'
           OR status LIKE '$like'
           OR description LIKE '$like'
    ");

    if (!$roadsSearch || !$parcelsSearch || !$damagedSearch) {
        echo json_encode([
            'success' => false,
            'message' => 'Query pencarian gagal: ' . $conn->error
        ]);
        exit;
    }

    $roads   = $roadsSearch->fetch_all(MYSQLI_ASSOC);
    $parcels = $parcelsSearch->fetch_all(MYSQLI_ASSOC);
    $damaged = $damagedSearch->fetch_all(MYSQLI_ASSOC);

    $results = array_merge(
        $roads,
        $parcels,
        $damaged
    );

    echo json_encode([
        'success' => true,
        'data' => $results
    ]);

    exit;
}

// ============================================================
// GET ONE
// ============================================================
if ($action === 'get_one') {

    $id = (int)($_GET['id'] ?? 0);
    $type = $_GET['type'] ?? '';

    switch ($type) {

        case 'road':
            $table = 'roads';
            break;

        case 'parcel':
            $table = 'parcels';
            break;

        case 'damaged':
            $table = 'damaged_roads';
            break;

        default:
            echo json_encode([
                'success' => false,
                'message' => 'Tipe tidak valid'
            ]);
            exit;
    }

    $result = $conn->query(
        "SELECT * FROM $table WHERE id = $id"
    );

    $row = $result->fetch_assoc();

    if ($row) {
        $row['foto_url'] = !empty($row['foto'])
            ? 'uploads/' . $row['foto']
            : null;
    }

    echo json_encode([
        'success' => true,
        'data' => $row
    ]);

    exit;
}

// ============================================================
// SAVE DATA
// ============================================================
if ($action === 'save') {

    $id = isset($_POST['id'])
        ? (int)$_POST['id']
        : 0;

    $type = $_POST['type'] ?? '';

    $name = $conn->real_escape_string($_POST['name'] ?? '');
    $status = $conn->real_escape_string($_POST['status'] ?? '');
    $geom = $conn->real_escape_string($_POST['geom'] ?? '');
    $measure = $conn->real_escape_string($_POST['measure'] ?? '');
    $description = $conn->real_escape_string($_POST['description'] ?? '');

    $newFoto = uploadFoto('foto');

    if ($type === 'road') {

        if ($id > 0) {

            $fotoSql = $newFoto
                ? ", foto='$newFoto'"
                : "";

            $sql = "
                UPDATE roads
                SET
                    name='$name',
                    status='$status',
                    length_m='$measure',
                    geom='$geom'
                    $fotoSql
                WHERE id=$id
            ";

        } else {

            $fotoVal = $newFoto
                ? "'$newFoto'"
                : "NULL";

            $sql = "
                INSERT INTO roads
                (
                    name,
                    status,
                    length_m,
                    geom,
                    foto
                )
                VALUES
                (
                    '$name',
                    '$status',
                    '$measure',
                    '$geom',
                    $fotoVal
                )
            ";
        }

    } elseif ($type === 'parcel') {

        if ($id > 0) {

            $fotoSql = $newFoto
                ? ", foto='$newFoto'"
                : "";

            $sql = "
                UPDATE parcels
                SET
                    name='$name',
                    status='$status',
                    area_sqm='$measure',
                    geom='$geom'
                    $fotoSql
                WHERE id=$id
            ";

        } else {

            $fotoVal = $newFoto
                ? "'$newFoto'"
                : "NULL";

            $sql = "
                INSERT INTO parcels
                (
                    name,
                    status,
                    area_sqm,
                    geom,
                    foto
                )
                VALUES
                (
                    '$name',
                    '$status',
                    '$measure',
                    '$geom',
                    $fotoVal
                )
            ";
        }

    } elseif ($type === 'damaged') {

        if ($id > 0) {

            $fotoSql = $newFoto
                ? ", foto='$newFoto'"
                : "";

            $sql = "
                UPDATE damaged_roads
                SET
                    name='$name',
                    status='$status',
                    description='$description',
                    geom='$geom'
                    $fotoSql
                WHERE id=$id
            ";

        } else {

            $fotoVal = $newFoto
                ? "'$newFoto'"
                : "NULL";

            $sql = "
                INSERT INTO damaged_roads
                (
                    name,
                    status,
                    description,
                    geom,
                    foto
                )
                VALUES
                (
                    '$name',
                    '$status',
                    '$description',
                    '$geom',
                    $fotoVal
                )
            ";
        }

    } else {

        echo json_encode([
            'success' => false,
            'message' => 'Tipe data tidak valid'
        ]);

        exit;
    }

    if ($conn->query($sql)) {

        echo json_encode([
            'success' => true,
            'message' => 'Data berhasil disimpan',
            'id' => $id > 0 ? $id : $conn->insert_id
        ]);

    } else {

        echo json_encode([
            'success' => false,
            'message' => $conn->error
        ]);
    }

    exit;
}

// ============================================================
// DELETE DATA
// ============================================================
if ($action === 'delete') {

    $id = (int)($_POST['id'] ?? 0);
    $type = $_POST['type'] ?? '';

    switch ($type) {

        case 'road':
            $table = 'roads';
            break;

        case 'parcel':
            $table = 'parcels';
            break;

        case 'damaged':
            $table = 'damaged_roads';
            break;

        default:
            echo json_encode([
                'success' => false,
                'message' => 'Tipe tidak valid'
            ]);
            exit;
    }

    $check = $conn->query(
        "SELECT foto FROM $table WHERE id=$id"
    );

    if ($check && $check->num_rows > 0) {

        $row = $check->fetch_assoc();

        if (
            !empty($row['foto']) &&
            file_exists('uploads/' . $row['foto'])
        ) {
            unlink('uploads/' . $row['foto']);
        }
    }

    if ($conn->query(
        "DELETE FROM $table WHERE id=$id"
    )) {

        echo json_encode([
            'success' => true,
            'message' => 'Data berhasil dihapus'
        ]);

    } else {

        echo json_encode([
            'success' => false,
            'message' => $conn->error
        ]);
    }

    exit;
}

// ============================================================
// ACTION TIDAK DITEMUKAN
// ============================================================

echo json_encode([
    'success' => false,
    'message' => 'Action tidak ditemukan'
]);