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<?php declare(strict_types=1);

namespace Automattic\WooCommerce\Vendor\League\Container\Definition;

use Automattic\WooCommerce\Vendor\League\Container\Argument\{
    ArgumentResolverInterface, ArgumentResolverTrait, ClassNameInterface, RawArgumentInterface
};
use Automattic\WooCommerce\Vendor\League\Container\ContainerAwareTrait;
use ReflectionClass;
use ReflectionException;

class Definition implements ArgumentResolverInterface, DefinitionInterface
{
    use ArgumentResolverTrait;
    use ContainerAwareTrait;

/**
     * @var string
     */
    protected $alias;

/**
     * @var mixed
     */
    protected $concrete;

/**
     * @var boolean
     */
    protected $shared = false;

/**
     * @var array
     */
    protected $tags = [];

/**
     * @var array
     */
    protected $arguments = [];

/**
     * @var array
     */
    protected $methods = [];

/**
     * @var mixed
     */
    protected $resolved;

/**
     * Constructor.
     *
     * @param string $id
     * @param mixed  $concrete
     */
    public function __construct(string $id, $concrete = null)
    {
        $concrete = $concrete ?? $id;

$this->alias    = $id;
        $this->concrete = $concrete;
    }

/**
     * {@inheritdoc}
     */
    public function addTag(string $tag) : DefinitionInterface
    {
        $this->tags[$tag] = true;

return $this;
    }

/**
     * {@inheritdoc}
     */
    public function hasTag(string $tag) : bool
    {
        return isset($this->tags[$tag]);
    }

/**
     * {@inheritdoc}
     */
    public function setAlias(string $id) : DefinitionInterface
    {
        $this->alias = $id;

return $this;
    }

/**
     * {@inheritdoc}
     */
    public function getAlias() : string
    {
        return $this->alias;
    }

/**
     * {@inheritdoc}
     */
    public function setShared(bool $shared = true) : DefinitionInterface
    {
        $this->shared = $shared;

return $this;
    }

/**
     * {@inheritdoc}
     */
    public function isShared() : bool
    {
        return $this->shared;
    }

/**
     * {@inheritdoc}
     */
    public function getConcrete()
    {
        return $this->concrete;
    }

/**
     * {@inheritdoc}
     */
    public function setConcrete($concrete) : DefinitionInterface
    {
        $this->concrete = $concrete;
        $this->resolved = null;

return $this;
    }

/**
     * {@inheritdoc}
     */
    public function addArgument($arg) : DefinitionInterface
    {
        $this->arguments[] = $arg;

return $this;
    }

/**
     * {@inheritdoc}
     */
    public function addArguments(array $args) : DefinitionInterface
    {
        foreach ($args as $arg) {
            $this->addArgument($arg);
        }

return $this;
    }

/**
     * {@inheritdoc}
     */
    public function addMethodCall(string $method, array $args = []) : DefinitionInterface
    {
        $this->methods[] = [
            'method'    => $method,
            'arguments' => $args
        ];

return $this;
    }

/**
     * {@inheritdoc}
     */
    public function addMethodCalls(array $methods = []) : DefinitionInterface
    {
        foreach ($methods as $method => $args) {
            $this->addMethodCall($method, $args);
        }

return $this;
    }

/**
     * {@inheritdoc}
     */
    public function resolve(bool $new = false)
    {
        $concrete = $this->concrete;

if ($this->isShared() && $this->resolved !== null && $new === false) {
            return $this->resolved;
        }

if (is_callable($concrete)) {
            $concrete = $this->resolveCallable($concrete);
        }

if ($concrete instanceof RawArgumentInterface) {
            $this->resolved = $concrete->getValue();

return $concrete->getValue();
        }

if ($concrete instanceof ClassNameInterface) {
            $concrete = $concrete->getClassName();
        }

if (is_string($concrete) && class_exists($concrete)) {
            $concrete = $this->resolveClass($concrete);
        }

if (is_object($concrete)) {
            $concrete = $this->invokeMethods($concrete);
        }

if (is_string($concrete) && $this->getContainer()->has($concrete)) {
            $concrete = $this->getContainer()->get($concrete);
        }

$this->resolved = $concrete;

return $concrete;
    }

/**
     * Resolve a callable.
     *
     * @param callable $concrete
     *
     * @return mixed
     */
    protected function resolveCallable(callable $concrete)
    {
        $resolved = $this->resolveArguments($this->arguments);

return call_user_func_array($concrete, $resolved);
    }

/**
     * Resolve a class.
     *
     * @param string $concrete
     *
     * @return object
     *
     * @throws ReflectionException
     */
    protected function resolveClass(string $concrete)
    {
        $resolved   = $this->resolveArguments($this->arguments);
        $reflection = new ReflectionClass($concrete);

return $reflection->newInstanceArgs($resolved);
    }

/**
     * Invoke methods on resolved instance.
     *
     * @param object $instance
     *
     * @return object
     */
    protected function invokeMethods($instance)
    {
        foreach ($this->methods as $method) {
            $args = $this->resolveArguments($method['arguments']);

/** @var callable $callable */
            $callable = [$instance, $method['method']];
            call_user_func_array($callable, $args);
        }

return $instance;
    }
}