<?php

namespace App\Http\Controllers\Admin\System;

use App\Http\Controllers\Controller;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\File;
use Inertia\Inertia;
use Inertia\Response;

class LogController extends Controller
{
    public function index(Request $request): Response
    {
        $logFiles = $this->getLogFiles();

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

        if (! $selectedFile || ! in_array($selectedFile, $logFiles)) {
            $selectedFile = $logFiles[0] ?? null;
        }

        $logs = $selectedFile ? $this->parseLogFile($selectedFile) : [];

        return Inertia::render('admin/system/logs/index', [
            'logFiles' => $logFiles,
            'selectedFile' => $selectedFile,
            'logs' => $logs,
        ]);
    }

    private function getLogFiles(): array
    {
        $path = storage_path('logs');
        if (! File::exists($path)) {
            return [];
        }

        $files = File::files($path);

        return collect($files)
            ->map(fn($file) => $file->getFilename())
            ->filter(fn($filename) => str_ends_with($filename, '.log'))
            ->sortDesc()
            ->take(10)
            ->values()
            ->toArray();
    }

    private function parseLogFile($filename): array
    {
        $path = storage_path("logs/{$filename}");
        if (! File::exists($path)) {
            return [];
        }

        $content = File::get($path);

        $pattern = '/^\[(\d{4}-\d{2}-\d{2} \d{2}:\d{2}:\d{2})\] (\w+)\.(\w+): ([\s\S]*?)(?=\n^\[\d{4}-\d{2}-\d{2} \d{2}:\d{2}:\d{2}\]|$)/m';

        preg_match_all($pattern, $content, $matches, PREG_SET_ORDER);

        $logs = [];
        foreach ($matches as $index => $match) {
            $logs[] = [
                'id' => $index,
                'timestamp' => $match[1],
                'env' => $match[2],
                'level' => strtoupper($match[3]),
                'message' => trim($match[4]),
            ];
        }

        return array_reverse($logs);
    }
}