<?php

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use Inertia\Inertia;
use Spatie\Activitylog\Models\Activity;
use App\Models\User;
use Symfony\Component\HttpFoundation\StreamedResponse;

class ActivityLogController extends Controller
{
    public function index(Request $request)
    {
        $user = auth()->user();

        // Permission check
        if (!$user->can('manage-activity-logs')) {
            abort(403);
        }

        $query = Activity::with('causer')
            ->orderBy('created_at', 'desc');

        // Filter by module (log_name)
        if ($request->filled('module')) {
            $query->where('log_name', $request->module);
        }

        // Filter by user (causer)
        if ($request->filled('user_id')) {
            $query->where('causer_id', $request->user_id)
                  ->where('causer_type', User::class);
        }

        // Filter by event type
        if ($request->filled('event')) {
            $query->where('event', $request->event);
        }

        // Filter by date range
        if ($request->filled('date_from')) {
            $query->whereDate('created_at', '>=', $request->date_from);
        }
        if ($request->filled('date_to')) {
            $query->whereDate('created_at', '<=', $request->date_to);
        }

        // Search in description
        if ($request->filled('search')) {
            $search = $request->search;
            $query->where(function ($q) use ($search) {
                $q->where('description', 'like', "%{$search}%")
                  ->orWhere('properties', 'like', "%{$search}%");
            });
        }

        // Sorting
        $sortField = $request->get('sort', 'created_at');
        $sortDirection = $request->get('direction', 'desc');
        $allowedSorts = ['created_at', 'log_name', 'event', 'description'];
        if (in_array($sortField, $allowedSorts)) {
            $query->orderBy($sortField, $sortDirection === 'asc' ? 'asc' : 'desc');
        }

        $perPage = $request->get('per_page', 25);
        $activities = $query->paginate($perPage)->withQueryString();

        // Transform for frontend
        $activities->through(function ($activity) {
            return [
                'id' => $activity->id,
                'log_name' => $activity->log_name,
                'description' => $activity->description,
                'event' => $activity->event,
                'subject_type' => $activity->subject_type ? class_basename($activity->subject_type) : null,
                'subject_id' => $activity->subject_id,
                'causer' => $activity->causer ? [
                    'id' => $activity->causer->id,
                    'name' => $activity->causer->name,
                    'email' => $activity->causer->email,
                    'type' => $activity->causer->type ?? null,
                ] : null,
                'properties' => $activity->properties?->toArray() ?? [],
                'changes' => $activity->attribute_changes ?? null,
                'created_at' => $activity->created_at->toISOString(),
            ];
        });

        // Get available modules for filter dropdown
        $modules = Activity::select('log_name')
            ->distinct()
            ->whereNotNull('log_name')
            ->orderBy('log_name')
            ->pluck('log_name');

        // Get users for filter dropdown
        $users = User::select('id', 'name', 'email')
            ->whereIn('id', Activity::select('causer_id')->whereNotNull('causer_id')->distinct())
            ->orderBy('name')
            ->get();

        return Inertia::render('ActivityLogs/Index', [
            'activities' => $activities,
            'modules' => $modules,
            'users' => $users,
            'filters' => [
                'module' => $request->get('module', ''),
                'user_id' => $request->get('user_id', ''),
                'event' => $request->get('event', ''),
                'date_from' => $request->get('date_from', ''),
                'date_to' => $request->get('date_to', ''),
                'search' => $request->get('search', ''),
                'per_page' => $perPage,
            ],
        ]);
    }

    public function export(Request $request): StreamedResponse
    {
        $user = auth()->user();

        if (!$user->can('manage-activity-logs')) {
            abort(403);
        }

        $query = Activity::with('causer')
            ->orderBy('created_at', 'desc');

        if ($request->filled('module')) {
            $query->where('log_name', $request->module);
        }
        if ($request->filled('user_id')) {
            $query->where('causer_id', $request->user_id)
                  ->where('causer_type', User::class);
        }
        if ($request->filled('event')) {
            $query->where('event', $request->event);
        }
        if ($request->filled('date_from')) {
            $query->whereDate('created_at', '>=', $request->date_from);
        }
        if ($request->filled('date_to')) {
            $query->whereDate('created_at', '<=', $request->date_to);
        }
        if ($request->filled('search')) {
            $query->where('description', 'like', "%{$request->search}%");
        }

        $activities = $query->get();

        return response()->streamDownload(function () use ($activities) {
            $handle = fopen('php://output', 'w');

            // CSV header
            fputcsv($handle, [
                'Date/Time',
                'User',
                'Email',
                'Action',
                'Module',
                'Description',
                'Subject',
            ]);

            foreach ($activities as $activity) {
                fputcsv($handle, [
                    $activity->created_at->format('Y-m-d H:i:s'),
                    $activity->causer?->name ?? 'System',
                    $activity->causer?->email ?? '',
                    $activity->event ?? '',
                    $activity->log_name ?? '',
                    $activity->description,
                    $activity->subject_type ? class_basename($activity->subject_type) . ' #' . $activity->subject_id : '',
                ]);
            }

            fclose($handle);
        }, 'activity-logs-' . now()->format('Y-m-d') . '.csv', [
            'Content-Type' => 'text/csv',
        ]);
    }
}