<?php

namespace App\Filament\Resources\Contracts;

use App\Filament\Resources\Contracts\Pages;
use App\Models\Contract;
use App\Enums\NavigationGroup;
use App\Services\ContractScheduleService;
use Filament\Schemas\Schema;
use Filament\Resources\Resource;
use Filament\Tables;
use Filament\Tables\Table;
use App\Filament\Resources\Contracts\ContractResource\RelationManagers\ScheduleItemsRelationManager;
use App\Filament\Resources\Contracts\Schemas\ContractForm;

class ContractResource extends Resource
{
    protected static ?string $model = Contract::class;
    protected static string | \BackedEnum | null $navigationIcon = 'heroicon-o-document-text';
    protected static string | \UnitEnum | null $navigationGroup = NavigationGroup::TRANSACTION->value;
    protected static ?int $navigationSort = 4;

    protected static ?string $modelLabel = 'Hợp đồng';
    protected static ?string $pluralModelLabel = 'Hợp đồng';

    public static function form(Schema $schema): Schema
    {
        return ContractForm::configure($schema);
    }

    public static function table(Table $table): Table
    {
        return $table
            ->columns([
                Tables\Columns\TextColumn::make('contract_number')->label('Số HĐ')->searchable(),
                Tables\Columns\TextColumn::make('product.code')->label('Sản phẩm'),
                Tables\Columns\TextColumn::make('total_value')->label('Giá trị')->money('VND'),
                Tables\Columns\TextColumn::make('paid_amount')->label('Đã thu')->money('VND'),
                Tables\Columns\TextColumn::make('remaining_amount')->label('Còn lại')->money('VND'),
            ])
            ->actions([
                Tables\Actions\EditAction::make(),
                Tables\Actions\Action::make('generateSchedule')
                    ->label('Tạo lịch TT')
                    ->icon('heroicon-o-calendar-days')
                    ->color('warning')
                    ->requiresConfirmation()
                    ->modalHeading('Tạo lịch thanh toán')
                    ->modalDescription('Hành động này sẽ xóa lịch thanh toán cũ (nếu có) và tạo lại từ mẫu của dự án.')
                    ->action(function (Contract $record) {
                        try {
                            ContractScheduleService::generateFromTemplate($record);
                        } catch (\InvalidArgumentException $e) {
                            // Filament sẽ tự động hiển thị lỗi nếu throw ra trong action
                            throw $e;
                        }
                    })
                    ->visible(fn (Contract $record) => $record->signing_date !== null),
            ]);
    }

    public static function getRelations(): array { return [ScheduleItemsRelationManager::class]; }

    public static function getPages(): array
    {
        return [
            'index' => Pages\ListContracts::route('/'),
            'create' => Pages\CreateContract::route('/create'),
            'edit' => Pages\EditContract::route('/{record}/edit'),
        ];
    }
}