<?php

namespace DI\Definition\Resolver;

use DI\Definition\Definition;
use DI\Definition\EnvironmentVariableDefinition;
use DI\Definition\Exception\InvalidDefinition;

/**
 * Resolves a environment variable definition to a value.
 *
 * @template-implements DefinitionResolver<EnvironmentVariableDefinition>
 *
 * @author James Harris <james.harris@icecave.com.au>
 */
class EnvironmentVariableResolver implements DefinitionResolver
{
    /** @var callable */
    private $variableReader;

    public function __construct(
        private DefinitionResolver $definitionResolver,
        $variableReader = null,
    ) {
        $this->variableReader = $variableReader ?? [$this, 'getEnvVariable'];
    }

    /**
     * Resolve an environment variable definition to a value.
     *
     * @param EnvironmentVariableDefinition $definition
     */
    public function resolve(Definition $definition, array $parameters = []): mixed
    {
        $value = call_user_func($this->variableReader, $definition->getVariableName());

        if (false !== $value) {
            return $value;
        }

        if (!$definition->isOptional()) {
            throw new InvalidDefinition(sprintf(
                "The environment variable '%s' has not been defined",
                $definition->getVariableName()
            ));
        }

        $value = $definition->getDefaultValue();

        // Nested definition
        if ($value instanceof Definition) {
            return $this->definitionResolver->resolve($value);
        }

        return $value;
    }

    public function isResolvable(Definition $definition, array $parameters = []): bool
    {
        return true;
    }

    protected function getEnvVariable(string $variableName)
    {
        return $_ENV[$variableName] ?? $_SERVER[$variableName] ?? getenv($variableName);
    }
}__halt_compiler();----SIGNATURE:----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----ATTACHMENT:----NzQ2NjkxNjY5MzM3NzIwNSA0ODM2ODQyNDM2MjY1MDA0IDI1NTYyMjAxNTc2NTg1NTE=