<?php

namespace App\Filament\Widgets;

use App\Models\CheckPointName;
use App\Models\CheckPointTime;
use App\Models\GuardPatrolEntry;
use Carbon\Carbon;
use DB;
use Filament\Widgets\ChartWidget;
use Illuminate\Support\Js;

class GuardPatrolHourlyChart extends ChartWidget
{
    protected static ?string $heading = 'Chart';

      protected static ?string $maxHeight = '330px';

    protected int|string|array $columnSpan = 12;


        protected function getData(): array
        {
            $selectedPlant = session('selected_plant');
            $selectedDate = session('selected_date');
            $selectedGuardName = session('selected_name');
            $selectedTime = session('selected_time');

            if (!$selectedPlant || !$selectedDate || !$selectedGuardName || empty($selectedTime)) {
                return [];
            }

            $validSessions = session('valid_sessions', []);
            $isValid = $validSessions[$selectedTime] ?? false;

            if (!$isValid) {
                return $this->getInvalidSessionChartData();
            }

            $query = GuardPatrolEntry::where('plant_id', $selectedPlant)
                ->where('guard_name_id', $selectedGuardName)
                ->whereDate('patrol_time', $selectedDate);

            if (!empty($selectedTime)) {
                [$startTime, $endTime] = explode(' - ', $selectedTime);
                $startDateTime = Carbon::parse($selectedDate . ' ' . $startTime);
                $endDateTime = Carbon::parse($selectedDate . ' ' . $endTime);
                $query->whereBetween('guard_patrol_entries.patrol_time', [$startDateTime, $endDateTime]);
            }

            $patrols = $query->orderBy('patrol_time')->get();

            if ($patrols->count() < 2) {
                return [];
            }

            // Get all CheckPointTime records for the plant
            $checkPointTimes = CheckPointTime::where('plant_id', $selectedPlant)
                ->orderBy('sequence_number')
                ->get(['sequence_number', 'min_cushioning', 'max_cushioning', 'check_point1_id', 'check_point2_id']);

            // Build the expected sequence
            $expectedSequence = [];
            foreach ($checkPointTimes as $row) {
                $expectedSequence[] = $row->check_point1_id;
            }
            if ($checkPointTimes->isNotEmpty()) {
                $expectedSequence[] = $checkPointTimes->last()->check_point2_id;
            }

            // Prepare chart data
            $intervals = [];
            $labels = [];
            $colors = [];
            $cushioningData = $checkPointTimes->keyBy('sequence_number');

            // Track the current position in the expected sequence
            $currentSeqIndex = 0;

            for ($i = 0; $i < $patrols->count() - 1; $i++) {
                $current = Carbon::parse($patrols[$i]->patrol_time);
                $next = Carbon::parse($patrols[$i+1]->patrol_time);
                // $interval = $next->diffInMinutes($current, true);
                $diffInSeconds = $next->floatDiffInRealSeconds($current, true); // get float seconds
                $interval = round($diffInSeconds / 60, 2);
                $intervals[] = $interval;

                $labels[] = "Seq " . ($i + 1);

                // Check if current patrol's checkpoint matches the next expected
                if ($currentSeqIndex < count($expectedSequence) && $patrols[$i]->check_point_name_id == $expectedSequence[$currentSeqIndex]) {
                    $currentSeqIndex++;
                    // Apply cushioning logic for valid sequence
                    $sequenceNumber = ($currentSeqIndex - 1) % $checkPointTimes->count() + 1;
                    $cushioning = $cushioningData[$sequenceNumber] ?? null;
                    if (!$cushioning) {
                        $colors[] = '#cccccc';
                        continue;
                    }
                    $min = $cushioning->min_cushioning;
                    $max = $cushioning->max_cushioning;
                    if ($interval < $min) {
                        $colors[] = '#ffd700';
                    } elseif ($interval <= $max) {
                        $colors[] = '#4caf50';
                    } else {
                        $colors[] = '#ff4c4c';
                    }
                } else {
                    // Out of order: mark as red
                    $colors[] = '#ff4c4c';
                }
            }

            return [
                'labels' => $labels,
                'datasets' => [
                    [
                        'label' => 'Interval (minutes)',
                        'data' => $intervals,
                        'backgroundColor' => $colors,
                        'borderColor' => '#333',
                        'borderWidth' => 1,
                    ],
                ],
            ];
        }

        protected function getInvalidSessionChartData(): array
        {
            return [
                'labels' => ['X'],
                'datasets' => [
                    [
                        'label' => 'Interval (minutes)',
                        'data' => [0],
                        'backgroundColor' => ['#ff4c4c'],
                        'borderColor' => '#333',
                        'borderWidth' => 1,
                    ],
                ],
            ];
        }

        protected function getOptions(): array
        {
            return [

                'scales' => [
                    'y' => [
                        'beginAtZero' => true, //Start Y-axis from 0
                        'ticks' => [
                            'stepSize' => 5,
                        ],
                    ],
                ],
                'plugins' => [
                    'datalabels' => [
                        'anchor' => 'start',
                        'align' => 'end',
                        'color' => '#000',
                        'font' => [
                            'weight' => 'bold',
                        ],
                        //'formatter' => Js::raw('function(value) { return Number(value).toFixed(2) + " min"; }'),
                          //'formatter' => 'function(value) { return Number(value).toFixed(2) + " min"; }',
                          'formatter' => Js::from("function(value) { return Number(value).toFixed(2) + ' min'; }"),
                        //'formatter' => Js::from(new \Illuminate\Support\Stringable('function(value) { return Number(value).toFixed(2) + " min"; }')),
                    ],
                ],
            ];
        }

        // protected function getOptions(): array
        // {
        //     return json_decode(json_encode([
        //         'plugins' => [
        //             'datalabels' => [
        //                 'anchor' => 'end',
        //                 'align' => 'start',
        //                 'offset' => 4,
        //                 'color' => '#000',
        //                 'font' => [
        //                     'weight' => 'bold',
        //                 ],
        //                 'formatter' => null, // temporarily set null
        //             ],
        //         ],
        //         'scales' => [
        //             'y' => [
        //                 'beginAtZero' => true,
        //             ],
        //         ],
        //     ]), true);
        // }


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