<?php

namespace App\Filament\Resources\DonationResource\Pages;

use App\Filament\Resources\DonationResource;
use App\Models\Donation;
use Filament\Resources\Components\Tab;
use Filament\Resources\Pages\ListRecords;
use Illuminate\Database\Eloquent\Builder;

class ListDonations extends ListRecords
{
    protected static string $resource = DonationResource::class;

    public function getHeading(): string
    {
        return 'Donations';
    }

    public function getSubheading(): string
    {
        $todayCount = Donation::whereHas('donationConfirmation', fn ($q) => $q->whereNotNull('confirmed_at'))
            ->whereDate('created_at', today())
            ->count();
        $todayAmount = Donation::whereHas('donationConfirmation', fn ($q) => $q->whereNotNull('confirmed_at'))
            ->whereDate('created_at', today())
            ->sum('amount') / 100;

        return "Today: {$todayCount} confirmed (£" . number_format($todayAmount, 0) . ")";
    }

    public function getTabs(): array
    {
        $incompleteCount = Donation::whereDoesntHave('donationConfirmation', fn ($q) => $q->whereNotNull('confirmed_at'))
            ->where('created_at', '>=', now()->subDays(7))
            ->count();

        $recurring = Donation::where('reoccurrence', '!=', -1)
            ->whereHas('donationConfirmation', fn ($q) => $q->whereNotNull('confirmed_at'))
            ->count();

        // Use whereIn with subquery instead of whereHas to avoid null model crash
        // during Filament tab initialization (modifyQueryUsing gets a builder with no model)
        $confirmedSubquery = fn (Builder $q) => $q->whereIn(
            'donations.id',
            fn ($sub) => $sub->select('donation_id')
                ->from('donation_confirmations')
                ->whereNotNull('confirmed_at')
        );

        $unconfirmedSubquery = fn (Builder $q) => $q->whereNotIn(
            'donations.id',
            fn ($sub) => $sub->select('donation_id')
                ->from('donation_confirmations')
                ->whereNotNull('confirmed_at')
        );

        return [
            'today' => Tab::make('Today')
                ->icon('heroicon-o-clock')
                ->modifyQueryUsing(fn (Builder $q) => $confirmedSubquery($q)
                    ->whereDate('created_at', today())
                ),

            'all_confirmed' => Tab::make('All Confirmed')
                ->icon('heroicon-o-check-circle')
                ->modifyQueryUsing(fn (Builder $q) => $confirmedSubquery($q)),

            'incomplete' => Tab::make('Incomplete')
                ->icon('heroicon-o-exclamation-triangle')
                ->badge($incompleteCount > 0 ? $incompleteCount : null)
                ->badgeColor('danger')
                ->modifyQueryUsing(fn (Builder $q) => $unconfirmedSubquery($q)
                    ->where('created_at', '>=', now()->subDays(7))
                ),

            'zakat' => Tab::make('Zakat')
                ->icon('heroicon-o-star')
                ->modifyQueryUsing(fn (Builder $q) => $confirmedSubquery($q)
                    ->whereIn('donations.id', fn ($sub) => $sub->select('donation_id')
                        ->from('donation_preferences')
                        ->where('is_zakat', true))
                ),

            'gift_aid' => Tab::make('Gift Aid')
                ->icon('heroicon-o-gift')
                ->modifyQueryUsing(fn (Builder $q) => $confirmedSubquery($q)
                    ->whereIn('donations.id', fn ($sub) => $sub->select('donation_id')
                        ->from('donation_preferences')
                        ->where('is_gift_aid', true))
                ),

            'recurring' => Tab::make('Recurring')
                ->icon('heroicon-o-arrow-path')
                ->badge($recurring > 0 ? $recurring : null)
                ->badgeColor('info')
                ->modifyQueryUsing(fn (Builder $q) => $confirmedSubquery($q)
                    ->where('reoccurrence', '!=', -1)
                ),

            'everything' => Tab::make('Everything')
                ->icon('heroicon-o-squares-2x2'),
        ];
    }

    public function getDefaultActiveTab(): string | int | null
    {
        return 'today';
    }
}