<?php namespace DaveJamesMiller\Breadcrumbs;

class Manager {

    protected $currentRoute;
    protected $generator;
    protected $view;

    protected $callbacks = [];
    protected $viewName;
    protected $currentRouteManual;

    public function __construct(CurrentRoute $currentRoute, Generator $generator, View $view)
    {
        $this->generator    = $generator;
        $this->currentRoute = $currentRoute;
        $this->view         = $view;
    }

    public function register($name, $callback)
    {
        if (isset($this->callbacks[$name]))
            throw new Exception("Breadcrumb name \"{$name}\" has already been registered");
        $this->callbacks[$name] = $callback;
    }

    public function exists($name = null)
    {
        if (is_null($name)) {
            try {
                list($name) = $this->currentRoute->get();
            } catch (Exception $e) {
                return false;
            }
        }

        return isset($this->callbacks[$name]);
    }

    public function generate($name = null)
    {
        if (is_null($name))
            list($name, $params) = $this->currentRoute->get();
        else
            $params = array_slice(func_get_args(), 1);

        return $this->generator->generate($this->callbacks, $name, $params);
    }

    public function generateArray($name, $params = [])
    {
        return $this->generator->generate($this->callbacks, $name, $params);
    }

    public function generateIfExists($name = null)
    {
        if (is_null($name)) {
            try {
                list($name, $params) = $this->currentRoute->get();
            } catch (Exception $e) {
                return [];
            }
        } else {
            $params = array_slice(func_get_args(), 1);
        }

        if (!$this->exists($name))
            return [];

        return $this->generator->generate($this->callbacks, $name, $params);
    }

    public function generateIfExistsArray($name, $params = [])
    {
        if (!$this->exists($name))
            return [];

        return $this->generator->generate($this->callbacks, $name, $params);
    }

    /**
     * @deprecated Since 3.0.0
     * @see generateIfExistsArray
     */
    public function generateArrayIfExists()
    {
        return call_user_func_array([$this, 'generateIfExistsArray'], func_get_args());
    }

    public function render($name = null)
    {
        if (is_null($name))
            list($name, $params) = $this->currentRoute->get();
        else
            $params = array_slice(func_get_args(), 1);

        $breadcrumbs = $this->generator->generate($this->callbacks, $name, $params);

        return $this->view->render($this->viewName, $breadcrumbs);
    }

    public function renderArray($name, $params = [])
    {
        $breadcrumbs = $this->generator->generate($this->callbacks, $name, $params);

        return $this->view->render($this->viewName, $breadcrumbs);
    }

    public function renderIfExists($name = null)
    {
        if (is_null($name)) {
            try {
                list($name, $params) = $this->currentRoute->get();
            } catch (Exception $e) {
                return '';
            }
        } else {
            $params = array_slice(func_get_args(), 1);
        }

        if (!$this->exists($name))
            return '';

        $breadcrumbs = $this->generator->generate($this->callbacks, $name, $params);

        return $this->view->render($this->viewName, $breadcrumbs);
    }

    public function renderIfExistsArray($name, $params = [])
    {
        if (!$this->exists($name))
            return '';

        $breadcrumbs = $this->generator->generate($this->callbacks, $name, $params);

        return $this->view->render($this->viewName, $breadcrumbs);
    }

    /**
     * @deprecated Since 3.0.0
     * @see renderIfExistsArray
     */
    public function renderArrayIfExists()
    {
        return call_user_func_array([$this, 'renderIfExistsArray'], func_get_args());
    }

    public function setCurrentRoute($name)
    {
        $params = array_slice(func_get_args(), 1);

        $this->currentRoute->set($name, $params);
    }

    public function setCurrentRouteArray($name, $params = [])
    {
        $this->currentRoute->set($name, $params);
    }

    public function clearCurrentRoute()
    {
        $this->currentRoute->clear();
    }

    public function setView($view)
    {
        $this->viewName = $view;
    }

}