<?php

/*
 * This file is part of the Pagerfanta package.
 *
 * (c) Pablo Díez <pablodip@gmail.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Pagerfanta\View;

use Pagerfanta\PagerfantaInterface;

/**
 * DefaultInterface.
 *
 * @author Pablo Díez <pablodip@gmail.com>
 *
 * @api
 */
class DefaultView implements ViewInterface
{
    /**
     * {@inheritdoc}
     */
    public function render(PagerfantaInterface $pagerfanta, $routeGenerator, array $options = array())
    {
        $options = array_merge(array(
            'proximity'          => 2,
            'previous_message'   => 'Previous',
            'next_message'       => 'Next',
            'css_disabled_class' => 'disabled',
            'css_dots_class'     => 'dots',
            'css_current_class'  => 'current',
        ), $options);

        $currentPage = $pagerfanta->getCurrentPage();

        $startPage = $currentPage - $options['proximity'];
        $endPage = $currentPage + $options['proximity'];

        if ($startPage < 1) {
            $endPage = min($endPage + (1 - $startPage), $pagerfanta->getNbPages());
            $startPage = 1;
        }
        if ($endPage > $pagerfanta->getNbPages()) {
            $startPage = max($startPage - ($endPage - $pagerfanta->getNbPages()), 1);
            $endPage = $pagerfanta->getNbPages();
        }

        $pages = array();

        // previous
        if ($pagerfanta->hasPreviousPage()) {
            $pages[] = array($pagerfanta->getPreviousPage(), $options['previous_message']);
        } else {
            $pages[] = sprintf('<span class="%s">%s</span>', $options['css_disabled_class'], $options['previous_message']);
        }

        // first
        if ($startPage > 1) {
            $pages[] = array(1, 1);
            if (3 == $startPage) {
                $pages[] = array(2, 2);
            } elseif (2 != $startPage) {
                $pages[] = sprintf('<span class="%s">...</span>', $options['css_dots_class']);
            }
        }

        // pages
        for ($page = $startPage; $page <= $endPage; $page++) {
            if ($page == $currentPage) {
                $pages[] = sprintf('<span class="%s">%s</span>', $options['css_current_class'], $page);
            } else {
                $pages[] = array($page, $page);
            }
        }

        // last
        if ($pagerfanta->getNbPages() > $endPage) {
            if ($pagerfanta->getNbPages() > ($endPage + 1)) {
                if ($pagerfanta->getNbPages() > ($endPage + 2)) {
                    $pages[] = sprintf('<span class="%s">...</span>', $options['css_dots_class']);
                } else {
                    $pages[] = array($endPage + 1, $endPage + 1);
                }
            }

            $pages[] = array($pagerfanta->getNbPages(), $pagerfanta->getNbPages());
        }

        // next
        if ($pagerfanta->hasNextPage()) {
            $pages[] = array($pagerfanta->getNextPage(), $options['next_message']);
        } else {
            $pages[] = sprintf('<span class="%s">%s</span>', $options['css_disabled_class'], $options['next_message']);
        }

        // process
        $pagesHtml = '';
        foreach ($pages as $page) {
            if (is_string($page)) {
                $pagesHtml .= $page;
            } else {
                $pagesHtml .= '<a href="'.$routeGenerator($page[0]).'">'.$page[1].'</a>';
            }
        }

        return '<nav>'.$pagesHtml.'</nav>';
    }

    /**
     * {@inheritdoc}
     */
    public function getName()
    {
        return 'default';
    }
}

/*

CSS:

.pagerfanta {
}

.pagerfanta a,
.pagerfanta span {
    display: inline-block;
    border: 1px solid blue;
    color: blue;
    margin-right: .2em;
    padding: .25em .35em;
}

.pagerfanta a {
    text-decoration: none;
}

.pagerfanta a:hover {
    background: #ccf;
}

.pagerfanta .dots {
    border-width: 0;
}

.pagerfanta .current {
    background: #ccf;
    font-weight: bold;
}

.pagerfanta .disabled {
    border-color: #ccf;
    color: #ccf;
}

COLORS:

.pagerfanta a,
.pagerfanta span {
    border-color: blue;
    color: blue;
}

.pagerfanta a:hover {
    background: #ccf;
}

.pagerfanta .current {
    background: #ccf;
}

.pagerfanta .disabled {
    border-color: #ccf;
    color: #cf;
}

*/