<?php

declare(strict_types=1);

namespace Pcm\IconBundle\DependencyInjection;

use Symfony\Component\Config\Definition\Builder\ArrayNodeDefinition;
use Symfony\Component\Config\Definition\Builder\TreeBuilder;
use Symfony\Component\Config\Definition\ConfigurationInterface;

class Configuration implements ConfigurationInterface
{
    public const DEFAULT_SIZE = 32;
    public const DEFAULT_COLOUR = 'primary';

    public function getConfigTreeBuilder(): TreeBuilder
    {
        $treeBuilder = new TreeBuilder('pcm_icon');
        $this->addValidationRules($treeBuilder->getRootNode());

        return $treeBuilder;
    }

    private function addValidationRules(ArrayNodeDefinition $rootNode): void
    {
        // I've split the tree up like this because Intelephense was crying.
        // Plus I think it's a little easier to read.

        $rootNode
            ->children()
                ->arrayNode('default')
                    ->addDefaultsIfNotSet()
                    ->children()
                        ->scalarNode('colour')->defaultValue(self::DEFAULT_COLOUR)->end()
                        ->integerNode('size')->defaultValue(self::DEFAULT_SIZE)->end()
                    ->end()
                ->end()
            ->end()
        ;

        $rootNode
            ->children()
                ->arrayNode('directories')
                    ->validate()
                        ->ifEmpty()
                        ->thenInvalid("Directories cannot be empty!")
                    ->end()
                    ->scalarPrototype()
                        ->validate()
                            ->ifTrue(fn($path) => !is_dir($path))
                            ->thenInvalid('%s is not a directory!')
                        ->end()
                    ->end()
                ->end()
            ->end()
        ;

        $rootNode
            ->children()
                ->arrayNode('colours')
                    ->validate()
                        ->ifEmpty()
                        ->thenInvalid('Colours cannot be empty!')
                    ->end()

                    ->arrayPrototype()
                        ->normalizeKeys(false) # Don't normalize hyphens into underscores etc
                        ->children()
                            ->scalarNode('fill')->isRequired()->end()
                            ->scalarNode('stroke')->isRequired()->end()
                            ->scalarNode('fill-hover')->isRequired()->end()
                            ->scalarNode('stroke-hover')->isRequired()->end()
                            ->scalarNode('fill-group-hover')->isRequired()->end()
                            ->scalarNode('stroke-group-hover')->isRequired()->end()
                        ->end()
                    ->end()
                ->end()
            ->end()
        ;
    }
}