hqland-app/app/Filament/Resources/Payments/Schemas/PaymentForm.php

<?php

namespace App\Filament\Resources\Payments\Schemas;

use App\Models\PaymentScheduleItem;
use Filament\Forms\Components\DatePicker;
use Filament\Forms\Components\KeyValue;
use Filament\Forms\Components\Select;
use Filament\Forms\Components\TextInput;
use Filament\Schemas\Components\Section;
use Filament\Schemas\Components\Grid;
use Filament\Schemas\Schema;
use Filament\Schemas\Components\Utilities\Set;

class PaymentForm
{
    public static function configure(Schema $schema): Schema
    {
        return $schema
            ->components([
                Grid::make(3)
                    ->schema([
                        Section::make('Thông tin phiếu thu')
                            ->columnSpan(2)
                            ->columns(2)
                            ->schema([
                                Select::make('contract_id')
                                    ->label('Hợp đồng')
                                    ->relationship('contract', 'contract_number')
                                    ->searchable()
                                    ->preload()
                                    ->required()
                                    ->live()
                                    ->afterStateUpdated(function (Set $set) {
                                        $set('schedule_item_id', null);
                                    }),

                                Select::make('schedule_item_id')
                                    ->label('Đợt thanh toán')
                                    ->placeholder('Để trống nếu là tạm ứng / không đối soát đợt')
                                    ->options(function (callable $get) {
                                        $contractId = $get('contract_id');
                                        if (! $contractId) {
                                            return [];
                                        }

                                        return PaymentScheduleItem::query()
                                            ->whereHas('schedule', fn ($q) => $q->where('contract_id', $contractId))
                                            ->get()
                                            ->mapWithKeys(function ($item) {
                                                $label = 'Đợt '.$item->installment_no.' - '.$item->type;
                                                if ($item->amount) {
                                                    $label .= ' ('.number_format($item->amount).' VNĐ)';
                                                }

                                                return [$item->id => $label];
                                            });
                                    })
                                    ->searchable(),

                                TextInput::make('amount')
                                    ->label('Số tiền thu')
                                    ->numeric()
                                    ->prefix('VND')
                                    ->required()
                                    ->live(onBlur: true)
                                    ->helperText(function ($component) {
                                        $data = $component->getContainer()->getRawState();
                                        $contractId = $data['contract_id'] ?? null;
                                        $scheduleItemId = $data['schedule_item_id'] ?? null;

                                        if (! $contractId) {
                                            return 'Vui lòng chọn hợp đồng trước.';
                                        }

                                        $contract = \App\Models\Contract::find($contractId);
                                        if (! $contract) {
                                            return null;
                                        }

                                        if ($scheduleItemId) {
                                            $item = PaymentScheduleItem::find($scheduleItemId);
                                            if ($item) {
                                                $paid = $contract->payments()
                                                    ->where('schedule_item_id', $scheduleItemId)
                                                    ->when($component->getRecord() instanceof \App\Models\Payment, fn ($q, $r) => $q->where('id', '!=', $r->id))
                                                    ->sum('amount');
                                                $remaining = (float) $item->amount - (float) $paid;

                                                return 'Công nợ đợt này: '.number_format($remaining).' VNĐ';
                                            }
                                        }

                                        return 'Công nợ HĐ còn lại: '.number_format($contract->remaining_amount).' VNĐ';
                                    })
                                    ->rules([
                                        function ($component) {
                                            return function (string $attribute, $value, \Closure $fail) use ($component) {
                                                $data = $component->getContainer()->getRawState();
                                                $contractId = $data['contract_id'] ?? null;
                                                $scheduleItemId = $data['schedule_item_id'] ?? null;

                                                if (! $contractId || ! is_numeric($value)) {
                                                    return;
                                                }

                                                $contract = \App\Models\Contract::find($contractId);
                                                if (! $contract) {
                                                    return;
                                                }

                                                $maxAmount = null;

                                                if ($scheduleItemId) {
                                                    $item = PaymentScheduleItem::find($scheduleItemId);
                                                    if ($item) {
                                                        $paid = $contract->payments()
                                                            ->where('schedule_item_id', $scheduleItemId)
                                                            ->when($component->getRecord() instanceof \App\Models\Payment, fn ($q, $r) => $q->where('id', '!=', $r->id))
                                                            ->sum('amount');
                                                        $maxAmount = (float) $item->amount - (float) $paid;
                                                    }
                                                } else {
                                                    $maxAmount = (float) $contract->remaining_amount;
                                                }

                                                if ($maxAmount !== null && (float) $value > $maxAmount) {
                                                    $fail('Số tiền thu không được vượt quá '.number_format($maxAmount).' VNĐ.');
                                                }
                                            };
                                        },
                                    ]),

                                DatePicker::make('paid_date')
                                    ->label('Ngày thu')
                                    ->required()
                                    ->default(now()),

                                TextInput::make('receipt_number')
                                    ->label('Số phiếu thu / Mã giao dịch'),

                                Select::make('method')
                                    ->label('Phương thức thanh toán')
                                    ->options([
                                        'Chuyển khoản' => 'Chuyển khoản',
                                        'Tiền mặt' => 'Tiền mặt',
                                        'Thẻ' => 'Thẻ',
                                        'Khác' => 'Khác',
                                    ])
                                    ->default('Chuyển khoản')
                                    ->required(),

                                Select::make('collected_by')
                                    ->label('Ngườ thu')
                                    ->relationship('collector', 'name')
                                    ->searchable()
                                    ->preload()
                                    ->default(auth()->id())
                                    ->required(),
                            ]),

                        Section::make('Bổ sung')
                            ->columnSpan(1)
                            ->schema([
                                KeyValue::make('metadata')
                                    ->label('Dữ liệu bổ sung (nếu có)')
                                    ->keyLabel('Thông tin')
                                    ->valueLabel('Giá trị'),
                            ]),
                    ]),
            ]);
    }
}