<?php

namespace App\Filament\Widgets;

use Filament\Widgets\ChartWidget;

class ProductionLineStopChart extends ChartWidget
{
    protected static ?string $heading = 'Production Line Stop Chart';

    protected static ?string $maxHeight = '250px';

    protected function getData(): array
    {
        $activeFilter = $this->filter;
        $selectedPlant = session('selected_plant');
        $selectedLine = session('selected_line');

        if (!$selectedPlant || !$selectedLine)
        {
            return [
                'datasets' => [],
                'labels' => [],
            ];
        }

        // Set time range based on active filter
        if ($activeFilter === 'yesterday') {
            $startDate = now()->subDay()->setTime(8, 0, 0);
            $endDate = now()->setTime(8, 0, 0);
        } elseif ($activeFilter === 'this_week') {
            $startDate = now()->startOfWeek()->setTime(8, 0, 0);
            $endDate = now()->endOfWeek()->addDay()->setTime(8, 0, 0);
        } elseif ($activeFilter === 'this_month') {
            $startDate = now()->startOfMonth();
            $endDate = now()->endOfMonth();
        } else {
            $startDate = now()->setTime(8, 0, 0);
            $endDate = now()->copy()->addDay()->setTime(8, 0, 0);
        }

        // Fetch stop reason data
       // treats minutes as a visual decimal (e.g., 15 mins = 0.15)
        $query = \DB::table('production_line_stops')
        ->join('line_stops as ls', 'production_line_stops.linestop_id', '=', 'ls.id')
        ->join('lines', 'production_line_stops.line_id', '=', 'lines.id')
        ->join('plants', 'production_line_stops.plant_id', '=', 'plants.id')
        ->select(
            'ls.code',
            'ls.reason',
                        \DB::raw("
                SUM(production_line_stops.stop_hour) as total_stop_hours,
                SUM(production_line_stops.stop_min) as total_stop_minutes
            ")
          )
        ->when($selectedPlant, fn($q) => $q->where('plants.id', $selectedPlant))
        ->when($selectedLine, fn($q) => $q->where('lines.id', $selectedLine))
        ->whereBetween('production_line_stops.created_at', [$startDate, $endDate])
        ->groupBy('ls.code', 'ls.reason')
        //->orderByDesc('total_hours')
        ->get();

        // Handle empty data gracefully
        if ($query->isEmpty()) {
            return [
                'datasets' => [[
                    'label' => 'Line Stop Reasons',
                    'data' => [1],
                    'backgroundColor' => ['rgba(200, 200, 200, 0.4)'],
                    'borderColor' => ['rgba(200, 200, 200, 1)'],
                    'borderWidth' => 1,
                ]],
                'labels' => ['No Data'],
            ];
        }

        $labels = [];
        $data = [];
        $backgroundColors = [];
        $borderColors = [];

        foreach ($query as $row) {
        // --- STOP TIME (HH.MM format) ---
            $stopHours = $row->total_stop_hours;
            $stopMinutes = $row->total_stop_minutes;
            $visualTotal = $stopHours + ($stopMinutes / 100); // e.g., 0.15 (15 mins), 1.30 (1h 30m)

            // --- RUNTIME (HH.MM format) ---
            // 1. Convert stop time to total minutes
            $totalStopMinutes = ($stopHours * 60) + $stopMinutes;// Using 60 for minutes conversion

            // Calculate remaining minutes (1440 = 24 hours)
            $remainingMinutes = 1440 - $totalStopMinutes;

            // Convert back to "HH.MM" format (e.g., 22.59 = 22 hours 59 minutes)
            $runtimeHours = floor($remainingMinutes / 60);
            $runtimeMinutes = $remainingMinutes % 60;
            $runtime = $runtimeHours + ($runtimeMinutes / 100); // Remaining hours correctly calculated

            // Labels for stop and runtime
            $stopLabel = $row->code . ' - ' . $row->reason . ' (Stop)';
            $runtimeLabel = $row->code . ' - ' . $row->reason . ' (Runtime)';

            // Red bar = visual format using stop time
            $labels[] = $stopLabel;
            $data[] = $visualTotal;
            $backgroundColors[] = 'rgba(255, 99, 132, 0.7)';
            $borderColors[] = 'rgba(255, 99, 132, 1)';

            // Green bar = correct runtime math
            $labels[] = $runtimeLabel;
            $data[] = $runtime;
            $backgroundColors[] = 'rgba(75, 192, 75, 0.4)';
            $borderColors[] = 'rgba(75, 192, 75, 1)';
        }

        return [
            'datasets' => [[
                'label' => 'Line Stop Durations (hrs)',
                'data' => $data,
                'backgroundColor' => $backgroundColors,
                'borderColor' => $borderColors,
                'borderWidth' => 1,
            ]],
            'labels' => $labels,
        ];
    }


    protected function getType(): string
    {
        return 'doughnut';
    }

    protected function getFilters(): ?array
    {
        return [
            'today' => 'Today',
            'yesterday' => 'Yesterday',
            'this_week'=> 'This Week',
            'this_month'=> 'This Month',
        ];
    }

    public static function canView(): bool
    {
        // Only show on HourlyProduction page
        return request()->routeIs('filament.pages.production-line-stop-count');
    }
}