<?php

namespace App\Filament\Resources;

use App\Filament\Resources\PlanTierResource\Pages\CreatePlanTier;
use App\Filament\Resources\PlanTierResource\Pages\EditPlanTier;
use App\Filament\Resources\PlanTierResource\Pages\ListPlanTiers;
use App\Models\PlanTier;
use Filament\Actions\BulkActionGroup;
use Filament\Actions\CreateAction;
use Filament\Actions\DeleteAction;
use Filament\Actions\DeleteBulkAction;
use Filament\Actions\EditAction;
use Filament\Forms;
use Filament\Resources\Resource;
use Filament\Schemas\Components\Grid;
use Filament\Schemas\Schema;
use Filament\Support\Icons\Heroicon;
use Filament\Tables;
use Filament\Tables\Table;
use Illuminate\Database\Eloquent\Builder;
use Illuminate\Support\Facades\Log;

class PlanTierResource extends Resource
{
    protected static ?string $model = PlanTier::class;

    protected static string|null|\BackedEnum $navigationIcon = Heroicon::OutlinedServerStack;

    protected static string|null|\UnitEnum $navigationGroup = 'Subscription Management';

    protected static ?int $navigationSort = 3;

    public static function form(Schema $schema): Schema
    {
        return $schema
            ->schema([
                Grid::make(2)->schema([
                    Forms\Components\TextInput::make('name')
                        ->label('Tier Name')
                        ->required()
                        ->maxLength(255)
                        ->helperText('e.g., Basic, Pro, Enterprise'),

                    Forms\Components\TextInput::make('sort_order')
                        ->label('Sort Order')
                        ->numeric()
                        ->default(0)
                        ->helperText('Display order in hierarchy'),
                ]),

                Forms\Components\Textarea::make('description')
                    ->label('Description')
                    ->rows(3)
                    ->maxLength(500)
                    ->helperText('Describe this tier level'),

                Forms\Components\Select::make('parent_tier_id')
                    ->label('Parent Tier')
                    ->relationship('parentTier', 'name')
                    ->nullable()
                    ->searchable()
                    ->helperText('Optional parent tier for hierarchical structure'),

                Forms\Components\KeyValue::make('metadata')
                    ->label('Metadata')
                    ->keyLabel('Key')
                    ->valueLabel('Value')
                    ->reorderable()
                    ->addable()
                    ->deletable()
                    ->helperText('Additional tier metadata'),
            ]);
    }

    public static function table(Table $table): Table
    {
        return $table
            ->columns([
                Tables\Columns\TextColumn::make('name')
                    ->label('Tier Name')
                    ->searchable()
                    ->sortable(),

                Tables\Columns\TextColumn::make('parentTier.name')
                    ->label('Parent Tier')
                    ->badge()
                    ->color('info')
                    ->placeholder('Root Tier')
                    ->sortable(),

                Tables\Columns\TextColumn::make('description')
                    ->label('Description')
                    ->limit(50)
                    ->searchable(),

                Tables\Columns\TextColumn::make('sort_order')
                    ->label('Order')
                    ->sortable()
                    ->alignCenter(),

                Tables\Columns\TextColumn::make('plans_count')
                    ->label('Plans')
                    ->counts('plans')
                    ->badge()
                    ->color('primary')
                    ->sortable(false),
            ])
            ->filters([
                Tables\Filters\SelectFilter::make('parent_tier_id')
                    ->label('Parent Tier')
                    ->relationship('parentTier', 'name')
                    ->searchable()
                    ->placeholder('All tiers'),

                Tables\Filters\Filter::make('has_parent')
                    ->label('Has Parent')
                    ->query(fn (Builder $query): Builder => $query->whereNotNull('parent_tier_id'))
                    ->toggle(),

                Tables\Filters\Filter::make('is_root')
                    ->label('Root Tiers Only')
                    ->query(fn (Builder $query): Builder => $query->whereNull('parent_tier_id'))
                    ->toggle(),
            ])
            ->recordActions([
                EditAction::make(),
                DeleteAction::make()
                    ->before(function (PlanTier $record) {
                        // Prevent deletion if tier has child tiers or plans
                        if ($record->childTiers()->exists()) {
                            Log::error('Cannot delete tier that has child tiers');
                        }
                        if ($record->plans()->exists()) {
                            Log::error('Cannot delete tier that has plans assigned');
                        }
                    }),
            ])
            ->toolbarActions([
                BulkActionGroup::make([
                    DeleteBulkAction::make()
                        ->before(function ($records) {
                            foreach ($records as $record) {
                                if ($record->childTiers()->exists()) {
                                    Log::error('Cannot delete tiers that have child tiers');
                                }
                                if ($record->plans()->exists()) {
                                    Log::error('Cannot delete tiers that have plans assigned');
                                }
                            }
                        }),
                ]),
            ])
            ->emptyStateActions([
                CreateAction::make(),
            ])
            ->defaultSort('sort_order', 'asc');
    }

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

    public static function getPages(): array
    {
        return [
            'index' => ListPlanTiers::route('/'),
            'create' => CreatePlanTier::route('/create'),
            'edit' => EditPlanTier::route('/{record}/edit'),
        ];
    }

    public static function getNavigationBadge(): ?string
    {
        return static::getModel()::count();
    }

    public static function getNavigationBadgeColor(): ?string
    {
        return 'info';
    }
}