<?php

namespace App\Filament\Widgets;

use Filament\Widgets\ChartWidget;

class ItemOverview extends ChartWidget
{
    protected static ?string $heading = 'Hourly Production';

   // protected int|string|array $columnSpan = 'full';
    protected int|string|array $columnSpan = 12;

    protected static ?string $maxHeight = '350px';

    protected $listeners = ['filtersUpdated' => '$refresh'];

    protected function getData(): array
{
    $activeFilter = $this->filter;

    $selectedPlant = session('selected_plant') ?? session('select_plant');
    $selectedLine = session('selected_line') ?? session('select_line');


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

    if ($activeFilter === 'yesterday') {
        $startDate = now()->subDay()->startOfDay();
        $endDate = now()->subDay()->endOfDay();
        $groupBy = 'EXTRACT(HOUR FROM production_quantities.created_at)';
    }
    else if ($activeFilter === 'this_week') {
        $startDate = now()->startOfWeek();  // Monday 12:00 AM
        $endDate = now()->endOfWeek();      // Sunday 11:59 PM
        $groupBy = 'EXTRACT(DOW FROM production_quantities.created_at)'; // Group by day of week
    }
    else if ($activeFilter === 'this_month') {
        $startDate = now()->startOfMonth();
        $endDate = now()->endOfMonth();
        $groupBy = "FLOOR((EXTRACT(DAY FROM production_quantities.created_at) - 1) / 7) + 1";
    }
    else
    {
        $startDate = now()->startOfDay();
        $endDate = now()->endOfDay();
        $groupBy = 'EXTRACT(HOUR FROM production_quantities.created_at)';
    }

    $query = \DB::table('production_quantities')
        ->join('plants', 'production_quantities.plant_id', '=', 'plants.id') //inner join
        ->join('lines', 'production_quantities.line_id', '=', 'lines.id')
        ->selectRaw("$groupBy AS time_unit, count(*) AS total_quantity")
        ->whereBetween('production_quantities.created_at', [$startDate, $endDate])
        ->when($selectedPlant, function ($q) use ($selectedPlant) {
            return $q->where('plants.id', $selectedPlant);
        })
        ->when($selectedLine, function ($q) use ($selectedLine) {
            return $q->where('lines.id', $selectedLine);
        })

        ->groupByRaw($groupBy)
        ->orderByRaw($groupBy)
        ->pluck('total_quantity', 'time_unit')
        ->toArray();
        if ($activeFilter === 'this_month') {
            $weeksCount = ceil($endDate->day / 7); // Calculate total weeks dynamically
            $allWeeks = array_fill(1, $weeksCount, 0); // Initialize all weeks with 0
            $data = array_replace($allWeeks, $query);  // Fill missing weeks with 0

            // Generate dynamic week labels
            $labels = [];
            for ($i = 1; $i <= $weeksCount; $i++) {
                $weekStart = $startDate->copy()->addDays(($i - 1) * 7)->format('d M');
                $weekEnd = $startDate->copy()->addDays($i * 7 - 1)->min($endDate)->format('d M');
                $labels[] = "Week $i ($weekStart - $weekEnd)";
            }

            $orderedData = array_values($data);
        }
        else if ($activeFilter === 'this_week') {
            // Correct week labels: ['Mon', 'Tue', ..., 'Sun']
            $labels = ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun'];

            // Initialize default data for all 7 days
            $data = array_fill(0, 7, 0);

            // Fill in data from query results
            foreach ($query as $dow => $count) {
                $data[$dow] = $count;
            }

            // Ensure days are ordered from Monday to Sunday
            $orderedData = [
                $data[1] ?? 0, // Monday
                $data[2] ?? 0, // Tuesday
                $data[3] ?? 0, // Wednesday
                $data[4] ?? 0, // Thursday
                $data[5] ?? 0, // Friday
                $data[6] ?? 0, // Saturday
                $data[0] ?? 0, // Sunday (move to last)
            ];
        }
        else
        {
        // Hourly data (same as before)
        $allHours = array_fill(0, 24, 0);
        $data = array_replace($allHours, $query);

        // Shift hours for proper display (8 AM to 7 AM)
        $shiftedKeys = array_merge(range(8, 23), range(0, 8));
        $orderedData = array_map(fn($hour) => $data[$hour], $shiftedKeys);

        // Labels: ["8 AM", "9 AM", ..., "7 AM"]
        $labels = array_map(fn ($hour) => date("g A", strtotime("$hour:00")), $shiftedKeys);
    }

    return [
        'datasets' => [
            [
                'label' => match ($activeFilter) {
                    'this_week' => "Daily Production This Week",
                    'this_month' => "Weekly Production This Month", // Updated Label
                    'yesterday' => "Yesterday's Hourly Production",
                    default => "Today's Hourly Production",
                },
                'data' => $orderedData,
                'borderColor' => 'rgba(75, 192, 192, 1)',
                'backgroundColor' => 'rgba(75, 192, 192, 0.2)',
                'fill' => false,
                'tension' => 0.3,
            ],
        ],
        'labels' => $labels,
    ];
}

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

    // protected function getContent(): string
    // {
    //     return '<div style="height: 100%;">' . $this->chart->render() . '</div>';
    // }
    // protected function getContent(): string
    // {
    //     return <<<HTML
    //         <div id="chart-container" style="height: 100vh; width: 100%;">
    //             {$this->chart->render()}
    //         </div>
    //     HTML;
    // }


    protected function getOptions(): array
    {
        return [

            'scales' => [
                'y' => [
                    'beginAtZero' => true,
                    'ticks' => [
                        'stepSize' => 0.5,
                    ],
                ],
            ],

            // 'scales' => [
            //     'y' => [
            //         'beginAtZero' => true, //Start Y-axis from 0
            //         'ticks' => [
            //             'stepSize' => 0.5,
            //         ],
            //     ],
            // ],
        ];
    }

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