<?php

namespace App\Http\Controllers;

use App\Models\AuditLog;
use Illuminate\Http\Request;

class AdminAuditLogController extends Controller
{
    public function index(Request $request)
    {
        $query = AuditLog::query()->with('user');

        $search = $request->string('search')->toString();
        $action = $request->string('action')->toString();
        $userId = $request->integer('user_id');
        $start = $request->date('start_date');
        $end = $request->date('end_date');

        if ($search) {
            $query->where(function ($q) use ($search) {
                $q->where('action', 'like', "%{$search}%")
                    ->orWhere('metadata', 'like', "%{$search}%");
            });
        }

        if ($action) {
            $query->where('action', $action);
        }

        if ($userId) {
            $query->where('user_id', $userId);
        }

        if ($start) {
            $query->whereDate('created_at', '>=', $start);
        }

        if ($end) {
            $query->whereDate('created_at', '<=', $end);
        }

        $logs = $query->orderByDesc('created_at')->paginate(25)->withQueryString();

        $actions = AuditLog::select('action')->distinct()->orderBy('action')->pluck('action');
        $users = AuditLog::with('user')->whereNotNull('user_id')->select('user_id')->distinct()->get()->map(function ($log) {
            return $log->user;
        })->filter();
        $auditableTypes = AuditLog::select('auditable_type')->distinct()->whereNotNull('auditable_type')->orderBy('auditable_type')->pluck('auditable_type');

        return view('admin.audit.index', [
            'logs' => $logs,
            'search' => $search,
            'actionFilter' => $action,
            'userFilter' => $userId,
            'startDate' => $start,
            'endDate' => $end,
            'actions' => $actions,
            'users' => $users,
            'auditableTypes' => $auditableTypes,
        ]);
    }

    public function export(Request $request)
    {
        $query = AuditLog::query()->with('user');

        if ($search = $request->string('search')->toString()) {
            $query->where(function ($q) use ($search) {
                $q->where('action', 'like', "%{$search}%")
                    ->orWhere('metadata', 'like', "%{$search}%");
            });
        }

        if ($action = $request->string('action')->toString()) {
            $query->where('action', $action);
        }

        if ($userId = $request->integer('user_id')) {
            $query->where('user_id', $userId);
        }

        if ($start = $request->date('start_date')) {
            $query->whereDate('created_at', '>=', $start);
        }

        if ($end = $request->date('end_date')) {
            $query->whereDate('created_at', '<=', $end);
        }

        return response()->stream(function () use ($query) {
            $handle = fopen('php://output', 'w');
            fputcsv($handle, ['Timestamp', 'User', 'Action', 'Metadata']);

            $query->orderByDesc('created_at')->chunk(500, function ($logs) use ($handle) {
                foreach ($logs as $log) {
                    fputcsv($handle, [
                        $log->created_at,
                        $log->user?->email ?? 'System',
                        $log->action,
                        json_encode($log->metadata, JSON_UNESCAPED_UNICODE),
                    ]);
                }
            });

            fclose($handle);
        }, 200, [
            'Content-Type' => 'text/csv',
            'Content-Disposition' => 'attachment; filename="audit-logs-'.now()->format('Ymd_His').'.csv"',
        ]);
    }
}