<?php

namespace DeliciousBrains\WPMDB\Container\Invoker;

use DeliciousBrains\WPMDB\Container\Interop\Container\ContainerInterface;
use DeliciousBrains\WPMDB\Container\Interop\Container\Exception\NotFoundException;
use DeliciousBrains\WPMDB\Container\Invoker\Exception\NotCallableException;
/**
 * Resolves a callable from a container.
 *
 * @author Matthieu Napoli <matthieu@mnapoli.fr>
 */
class CallableResolver
{
    /**
     * @var ContainerInterface
     */
    private $container;
    public function __construct(ContainerInterface $container)
    {
        $this->container = $container;
    }
    /**
     * Resolve the given callable into a real PHP callable.
     *
     * @param callable|string|array $callable
     *
     * @return callable Real PHP callable.
     *
     * @throws NotCallableException
     */
    public function resolve($callable)
    {
        if (\is_string($callable) && \strpos($callable, '::') !== \false) {
            $callable = \explode('::', $callable, 2);
        }
        $callable = $this->resolveFromContainer($callable);
        if (!\is_callable($callable)) {
            throw NotCallableException::fromInvalidCallable($callable, \true);
        }
        return $callable;
    }
    /**
     * @param callable|string|array $callable
     * @return callable
     * @throws NotCallableException
     */
    private function resolveFromContainer($callable)
    {
        // Shortcut for a very common use case
        if ($callable instanceof \Closure) {
            return $callable;
        }
        $isStaticCallToNonStaticMethod = \false;
        // If it's already a callable there is nothing to do
        if (\is_callable($callable)) {
            $isStaticCallToNonStaticMethod = $this->isStaticCallToNonStaticMethod($callable);
            if (!$isStaticCallToNonStaticMethod) {
                return $callable;
            }
        }
        // The callable is a container entry name
        if (\is_string($callable)) {
            try {
                return $this->container->get($callable);
            } catch (NotFoundException $e) {
                throw NotCallableException::fromInvalidCallable($callable, \true);
            }
        }
        // The callable is an array whose first item is a container entry name
        // e.g. ['some-container-entry', 'methodToCall']
        if (\is_array($callable) && \is_string($callable[0])) {
            try {
                // Replace the container entry name by the actual object
                $callable[0] = $this->container->get($callable[0]);
                return $callable;
            } catch (NotFoundException $e) {
                if ($isStaticCallToNonStaticMethod) {
                    throw new NotCallableException(\sprintf('Cannot call %s::%s() because %s() is not a static method and "%s" is not a container entry', $callable[0], $callable[1], $callable[1], $callable[0]));
                }
                throw new NotCallableException(\sprintf('Cannot call %s on %s because it is not a class nor a valid container entry', $callable[1], $callable[0]));
            }
        }
        // Unrecognized stuff, we let it fail later
        return $callable;
    }
    /**
     * Check if the callable represents a static call to a non-static method.
     *
     * @param mixed $callable
     * @return bool
     */
    private function isStaticCallToNonStaticMethod($callable)
    {
        if (\is_array($callable) && \is_string($callable[0])) {
            list($class, $method) = $callable;
            $reflection = new \ReflectionMethod($class, $method);
            return !$reflection->isStatic();
        }
        return \false;
    }
}
