<?php

namespace App\Filament\Widgets;

use App\Models\InvoiceValidation;
use App\Models\Line;
use App\Models\Plant;
use DB;
use Filament\Widgets\ChartWidget;
use Illuminate\Support\Js;

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

    protected int|string|array $columnSpan = 12;

    protected $listeners = ['invoiceChart'];


    protected function getData(): array
    {
        $selectedPlant = session('selec_plant');
        $selectedInvoice = session('select_invoice');
        $activeFilter = $this->filter; // Assuming filter is passed and activeFilter can be 'yesterday', 'this_week', 'this_month'

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

        // Define the date range based on the active filter
        if ($activeFilter == 'yesterday') {
            $startDate = now()->subDay()->setTime(8, 0, 0);
            $endDate = now()->setTime(8, 0, 0);
            $groupBy = 'none'; // No grouping by hour
        } elseif ($activeFilter == 'this_week') {
            $startDate = now()->startOfWeek()->setTime(8, 0, 0);
            $endDate = now()->endOfWeek()->addDay()->setTime(8, 0, 0);
            $groupBy = 'day_of_week';
        } elseif ($activeFilter == 'this_month') {
            $startDate = now()->startOfMonth()->setTime(8, 0, 0);
            $endDate = now()->endOfMonth()->setTime(8, 0, 0);
            $groupBy = 'week_of_month';
        } else {
            $startDate = now()->setTime(8, 0, 0);
            $endDate = now()->copy()->addDay()->setTime(8, 0, 0);
            $groupBy = 'none'; // No grouping by hour
        }

        // Get the counts for Imported Invoices (unique invoice numbers) and Completed Invoices
        if ($selectedInvoice == 'individual_material')
        {
            $importedInvoicesCount = InvoiceValidation::where('plant_id', $selectedPlant)
                ->where('quantity', 1)
                ->whereBetween('created_at', [$startDate, $endDate]) // Filter by date range
                ->distinct('invoice_number') // Only distinct invoice numbers
                ->count('invoice_number');

                $completedInvoicesCount = InvoiceValidation::select('invoice_number')
                ->where('plant_id', $selectedPlant)
                ->where('quantity', 1)
                ->whereBetween('updated_at', [$startDate, $endDate])
                ->groupBy('invoice_number')
                ->havingRaw(
                    "COUNT(*) = SUM(CASE WHEN serial_number IS NOT NULL AND serial_number != '' THEN 1 ELSE 0 END)"
                )
                ->count();
        }
        elseif ($selectedInvoice == 'serial_invoice')
        {
            $importedInvoicesCount = InvoiceValidation::where('plant_id', $selectedPlant)
                ->whereNull('quantity')
                ->whereBetween('created_at', [$startDate, $endDate])
                ->distinct('invoice_number')
                ->count('invoice_number');

             $completedInvoicesCount = InvoiceValidation::select('invoice_number')
                ->where('plant_id', $selectedPlant)
                ->whereNull('quantity')
                ->whereBetween('updated_at', [$startDate, $endDate])
                ->groupBy('invoice_number')
                ->havingRaw(
                    "COUNT(*) = SUM(CASE WHEN scanned_status = 'Scanned' THEN 1 ELSE 0 END)"
                )
                ->count();

        }
        elseif ($selectedInvoice == 'bundle_material')
        {
            $importedInvoicesCount = InvoiceValidation::where('plant_id', $selectedPlant)
                ->where('quantity', '>', 1)
                ->whereBetween('created_at', [$startDate, $endDate]) // Filter by date range
                ->distinct('invoice_number') // Only distinct invoice numbers
                ->count('invoice_number');

            $completedInvoicesCount = InvoiceValidation::select('invoice_number')
                ->where('plant_id', $selectedPlant)
                ->where('quantity', '>', 1)
                ->whereBetween('updated_at', [$startDate, $endDate])
                ->groupBy('invoice_number')
                ->havingRaw(
                    "COUNT(*) = SUM(CASE WHEN serial_number IS NOT NULL AND serial_number != '' THEN 1 ELSE 0 END)"
                )
                ->count();
        }

        // Prepare the chart data
        $labels = []; // Labels for each bar
        $datasets = []; // Datasets for the chart

        if (in_array($activeFilter, ['yesterday'])) {
            $labels = ['Imported Invoice', 'Completed Invoice'];
            $datasets = [[
                'label' => 'Invoices',
                'data' => [$importedInvoicesCount, $completedInvoicesCount],
                'backgroundColor' => ['rgba(75, 192, 192, 1)', 'rgba(23, 211, 80, 1)'],
                'fill' => false,
            ]];
        }

        elseif ($activeFilter == 'this_week')
        {
            $daysOfWeek = ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun'];
            $importedInvoicesPerDay = array_fill(0, 7, 0);
            $completedInvoicesPerDay = array_fill(0, 7, 0);

            for ($index = 0; $index < 7; $index++) {
                $dayStart = now()->startOfWeek()->addDays($index)->setTime(8, 0, 0);
                $dayEnd = $dayStart->copy()->addDay()->setTime(8, 0, 0);

                $query = InvoiceValidation::where('plant_id', $selectedPlant);

                // Build completedQuery with only 'invoice_number' in select
                $completedQuery = InvoiceValidation::select('invoice_number')
                    ->where('plant_id', $selectedPlant);

                if ($selectedInvoice == 'individual_material')
                {
                    $query->where('quantity', 1)->whereBetween('created_at', [$dayStart, $dayEnd]);

                    $completedQuery->where('quantity', 1)
                        ->whereBetween('updated_at', [$dayStart, $dayEnd])
                        ->groupBy('invoice_number')
                        ->havingRaw(
                            "COUNT(*) = SUM(CASE WHEN serial_number IS NOT NULL AND serial_number != '' THEN 1 ELSE 0 END)"
                        );
                }
                elseif ($selectedInvoice == 'serial_invoice')
                {
                    $query->whereNull('quantity')->whereBetween('created_at', [$dayStart, $dayEnd]);

                    $completedQuery->whereNull('quantity')
                        ->whereBetween('updated_at', [$dayStart, $dayEnd])
                        ->groupBy('invoice_number')
                        ->havingRaw(
                            "COUNT(*) = SUM(CASE WHEN scanned_status = 'Scanned' THEN 1 ELSE 0 END)"
                        );
                }
                elseif ($selectedInvoice == 'bundle_material')
                {
                    $query->where('quantity', '>', 1)->whereBetween('created_at', [$dayStart, $dayEnd]);

                    $completedQuery->where('quantity', '>', 1)
                        ->whereBetween('updated_at', [$dayStart, $dayEnd])
                        ->groupBy('invoice_number')
                        ->havingRaw(
                            "COUNT(*) = SUM(CASE WHEN serial_number IS NOT NULL AND serial_number != '' THEN 1 ELSE 0 END)"
                        );
                }

                // Imported invoices count (distinct invoice_number)
                $importedInvoicesPerDay[$index] = $query->distinct('invoice_number')->count('invoice_number');

                $completedInvoicesPerDay[$index] = $completedQuery->count();
            }

            $labels = $daysOfWeek;
            $datasets = [
                [
                    'label' => 'Imported Invoices',
                    'data' => $importedInvoicesPerDay,
                    'backgroundColor' => 'rgba(75, 192, 192, 1)',
                ],
                [
                    'label' => 'Completed Invoices',
                    'data' => $completedInvoicesPerDay,
                    'backgroundColor' => 'rgba(23, 211, 80, 1)',
                ],
            ];
        }
        elseif ($activeFilter == 'this_month') {
            $startOfMonth = now()->startOfMonth()->setTime(8, 0, 0);
            $endOfMonth = now()->endOfMonth()->addDay()->setTime(8, 0, 0); // include full last day
            $monthName = $startOfMonth->format('M');

            // Prepare weekly labels like "May(1-7)", "May(8-14)", etc.
            $labels = [];
            $weekStart = $startOfMonth->copy();
            $importedInvoicesPerWeek = [];
            $completedInvoicesPerWeek = [];

            $weekIndex = 0;
            while ($weekStart < $endOfMonth) {
                $weekEnd = $weekStart->copy()->addDays(7);
                $startDay = $weekStart->format('j');
                $weekEndLimit = $weekEnd->copy()->subDay();
                $actualEnd = $weekEndLimit->greaterThan($endOfMonth) ? $endOfMonth : $weekEndLimit;
                $endDay = $actualEnd->format('j');

                $labels[] = "{$monthName}({$startDay}-{$endDay})";

                $queryImported = InvoiceValidation::where('plant_id', $selectedPlant)
                    ->whereBetween('created_at', [$weekStart, $weekEnd]);

                if ($selectedInvoice == 'individual_material')
                {
                    $queryImported->where('quantity', 1);
                }
                elseif ($selectedInvoice == 'serial_invoice')
                {
                    $queryImported->whereNull('quantity');
                }
                elseif ($selectedInvoice == 'bundle_material')
                {
                    $queryImported->where('quantity', '>', 1);
                }

                $importedInvoicesPerWeek[$weekIndex] = $queryImported->distinct('invoice_number')->count('invoice_number');

                // --- Completed ---
                $queryCompleted = InvoiceValidation::select('invoice_number')
                    ->where('plant_id', $selectedPlant)
                    ->whereBetween('updated_at', [$weekStart, $weekEnd]);

                if ($selectedInvoice == 'individual_material') {
                    $queryCompleted->where('quantity', 1)
                        ->groupBy('invoice_number')
                        ->havingRaw("COUNT(*) = SUM(CASE WHEN serial_number IS NOT NULL AND serial_number != '' THEN 1 ELSE 0 END)");
                } elseif ($selectedInvoice == 'serial_invoice') {
                    $queryCompleted->whereNull('quantity')
                        ->groupBy('invoice_number')
                        ->havingRaw("COUNT(*) = SUM(CASE WHEN scanned_status = 'Scanned' THEN 1 ELSE 0 END)");
                } elseif ($selectedInvoice == 'bundle_material') {
                    $queryCompleted->where('quantity', '>', 1)
                        ->groupBy('invoice_number')
                        ->havingRaw("COUNT(*) = SUM(CASE WHEN serial_number IS NOT NULL AND serial_number != '' THEN 1 ELSE 0 END)");
                }

                $completedInvoicesPerWeek[$weekIndex] = $queryCompleted->count();

                // Move to next week
                $weekStart = $weekEnd;
                $weekIndex++;
            }

            $datasets = [
                [
                    'label' => 'Imported Invoices',
                    'data' => $importedInvoicesPerWeek,
                    'backgroundColor' => 'rgba(75, 192, 192, 1)',
                ],
                [
                    'label' => 'Completed Invoices',
                    'data' => $completedInvoicesPerWeek,
                    'backgroundColor' => 'rgba(23, 211, 80, 1)',
                ],
            ];
        }


        // elseif ($activeFilter == 'this_month')
        // {
        //     $startOfMonth = now()->startOfMonth();
        //     $endOfMonth = now()->endOfMonth();
        //     $monthName = $startOfMonth->format('M');

        //     // Prepare weeks for the month
        //     $labels = [];
        //     $startDay = 1;
        //     $totalDays = $endOfMonth->day;

        //     while ($startDay <= $totalDays) {
        //         $endDay = min($startDay + 6, $totalDays);
        //         $labels[] = "{$monthName}({$startDay}-{$endDay})";
        //         $startDay += 7;
        //     }

        //     $importedInvoicesPerWeek = array_fill(0, count($labels), 0);
        //     $completedInvoicesPerWeek = array_fill(0, count($labels), 0);

        //     foreach ($labels as $index => $label) {
        //         $weekStart = now()->startOfMonth()->addDays(($index * 7))->setTime(8, 0, 0);
        //         $weekEnd = $weekStart->copy()->addDays(6)->setTime(8, 0, 0);

        //         $queryImported = DB::table('invoice_validations')->where('plant_id', $selectedPlant)->whereBetween('created_at', [$weekStart, $weekEnd]);
        //         $queryCompleted = DB::table('invoice_validations')->where('plant_id', $selectedPlant)->whereBetween('updated_at', [$weekStart, $weekEnd]);

        //         if ($selectedInvoice == 'individual_material') {
        //             $queryImported->where('quantity', 1);
        //             $queryCompleted->where('quantity', 1)
        //             ->whereNotNull('serial_number')
        //             ->where('serial_number','!=', '');
        //         } elseif ($selectedInvoice == 'serial_invoice') {
        //             $queryImported->whereNull('quantity');
        //             $queryCompleted->whereNull('quantity')
        //             ->where('scanned_status', 'Scanned');
        //         } elseif ($selectedInvoice == 'bundle_material') {
        //             $queryImported->where('quantity', '>', 1);
        //             $queryCompleted->where('quantity', '>', 1)
        //             ->whereNotNull('serial_number')
        //             ->where('serial_number','!=', '');
        //         }

        //         $importedInvoicesPerWeek[$index] = $queryImported->distinct('invoice_number')->count('invoice_number');
        //         $completedInvoicesPerWeek[$index] = $queryCompleted->distinct('invoice_number')->count('invoice_number');
        //     }

        //     $datasets = [
        //         [
        //             'label' => 'Imported Invoices',
        //             'data' => $importedInvoicesPerWeek,
        //             'backgroundColor' => 'rgba(75, 192, 192, 1)',
        //         ],
        //         [
        //             'label' => 'Completed Invoices',
        //             'data' => $completedInvoicesPerWeek,
        //             'backgroundColor' => 'rgba(23, 211, 80, 1)',
        //         ],
        //     ];
        // }
        else {
            $labels = ['Imported Invoice', 'Completed Invoice'];
            $datasets = [[
                'label' => 'Invoices',
                'data' => [$importedInvoicesCount, $completedInvoicesCount],
                'backgroundColor' => ['rgba(75, 192, 192, 1)', 'rgba(23, 211, 80, 1)'],
                'fill' => false,
            ]];
        }

        return [
            'datasets' => $datasets,
            'labels' => $labels,
        ];
    }


    protected function getType(): string
    {
        return 'bar';
    }
    public static function getDefaultName(): string
    {
        return 'invoice-chart';
    }

    // protected function getOptions(): array
    // {
    //     return [
    //         'scales' => [
    //             'y' => [
    //                 'beginAtZero' => true, //Start Y-axis from 0
    //                 'ticks' => [
    //                     'stepSize' => 1,
    //                 ],
    //             ],
    //         ],
    //     ];
    // }
    protected function getOptions(): array
    {
        return [
            //  'plugins' => [
            //         'datalabels' => [
            //             // 'anchor' => 'start',
            //             // 'align' => 'start',
            //             // 'offset' => 1,
            //                'anchor' => 'start',
            //                 'align' => 'start',
            //                 'offset' => 8,
            //             'color' => '#000',
            //             'font' => [
            //                 'weight' => 'bold',
            //             ],
            //             'formatter' => Js::from("function(value) { return Number(value); }"),
            //         ],
            //     ],
            'plugins' => [
                'datalabels' => false, // Disable datalabels plugin properly
            ],
            'scales' => [
                'y' => [
                    'beginAtZero' => true,
                    'ticks' => [
                        'stepSize' => 1,
                    ],
                ],
            ],
        ];
    }

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

    public static function canView(): bool
    {
      //  dd('Checking route:', request()->route()->getName());
        // to avoid showing the widget in other pages
        return request()->routeIs('filament.admin.pages.invoice-dashboard');
    }

}