<?php

declare(strict_types=1);

namespace App\Http\Controllers;

use App\Models\OsurgInitial;
use App\Models\SyncLog;
use App\Services\SyncService;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Storage;

class SyncController extends Controller
{
    protected function verifyToken(Request $request): bool
    {
        $token = OsurgInitial::val('sync_token', config('sync.token'));
        return $token !== '' && $request->header('X-Sync-Token') === $token;
    }

    public function export(Request $request): JsonResponse
    {
        if (! $this->verifyToken($request)) {
            return response()->json(['error' => 'Unauthorized'], 401);
        }

        $since = (int) $request->query('since', 0);

        return response()->json([
            'last_sync_id' => SyncLog::lastSyncId(),
            'changes'      => SyncLog::changesSince($since),
        ]);
    }

    public function apply(Request $request): JsonResponse
    {
        if (! $this->verifyToken($request)) {
            return response()->json(['error' => 'Unauthorized'], 401);
        }

        set_time_limit(0);

        $service = SyncService::fromConfig();
        $report  = $service->applyChanges($request->input('changes', []));

        return response()->json(['report' => $report]);
    }

    public function downloadFile(Request $request): mixed
    {
        if (! $this->verifyToken($request)) {
            return response()->json(['error' => 'Unauthorized'], 401);
        }

        $path = $request->query('path');
        if (! $path || ! Storage::disk('public')->exists($path)) {
            return response()->json(['error' => 'File not found'], 404);
        }

        return Storage::disk('public')->download($path);
    }

    public function receiveFile(Request $request): JsonResponse
    {
        if (! $this->verifyToken($request)) {
            return response()->json(['error' => 'Unauthorized'], 401);
        }

        set_time_limit(0);

        $path = $request->input('path');
        $file = $request->file('file');

        if (! $path || ! $file) {
            return response()->json(['error' => 'Missing path or file'], 400);
        }

        $path = ltrim(str_replace(['..', '\\'], ['', '/'], $path), '/');

        Storage::disk('public')->put($path, file_get_contents($file->getRealPath()));

        return response()->json(['success' => true, 'path' => $path]);
    }
}