<?php

namespace App\Filament\Widgets;

use App\Models\Department;
use App\Models\Feedback;
use Filament\Widgets\StatsOverviewWidget as BaseWidget;
use Filament\Widgets\StatsOverviewWidget\Stat;

class AvgProcessingTimeWidget extends BaseWidget
{
    protected function getStats(): array
    {
        $user = auth()->user();

        $query = Feedback::query()
            ->whereNotNull('assigned_to')
            ->whereNotNull('updated_at');

        if ($user->hasRole('manager') && ! $user->hasRole('admin')) {
            $deptIds = Department::where('manager_id', $user->id)->pluck('id');
            $query->whereIn('current_department_id', $deptIds);
        }

        $totalResolved = (clone $query)->whereIn('status', ['resolved', 'closed'])->count();

        $avgMinutes = (clone $query)
            ->whereIn('status', ['resolved', 'closed'])
            ->selectRaw('AVG(strftime("%s", updated_at) - strftime("%s", created_at)) / 60 as avg_minutes')
            ->value('avg_minutes');

        $totalPending = (clone $query)->whereNotIn('status', ['resolved', 'closed'])->count();

        $escalatedCount = (clone $query)->where('is_escalated', true)->count();

        $avgDisplay = $avgMinutes ? round($avgMinutes) . ' min' : 'N/A';
        $avgDescription = $avgMinutes
            ? 'Avg time from creation to resolution'
            : 'No resolved tickets yet';

        return [
            Stat::make('Resolved Tickets', (string) $totalResolved)
                ->description('Total resolved/closed tickets')
                ->descriptionIcon('heroicon-m-check-circle')
                ->color('success')
                ->chart([7, 3, 4, 5, 6, 8, $totalResolved]),

            Stat::make('Avg Processing Time', $avgDisplay)
                ->description($avgDescription)
                ->descriptionIcon('heroicon-m-clock')
                ->color('info'),

            Stat::make('Pending Tickets', (string) $totalPending)
                ->description('Still in progress')
                ->descriptionIcon('heroicon-m-arrow-path')
                ->color('warning')
                ->chart([3, 5, 4, 6, 5, 4, $totalPending]),

            Stat::make('Escalated', (string) $escalatedCount)
                ->description('Tickets marked as escalated')
                ->descriptionIcon('heroicon-m-exclamation-triangle')
                ->color('danger'),
        ];
    }

    public static function canView(): bool
    {
        return auth()->user()?->hasPermissionTo('view-dashboard-widgets') ?? false;
    }
}