<?php

class IndexTheme extends Themelet
{
    protected $page_number;
    protected $total_pages;
    protected $search_terms;

    public function set_page(int $page_number, int $total_pages, array $search_terms)
    {
        $this->page_number = $page_number;
        $this->total_pages = $total_pages;
        $this->search_terms = $search_terms;
    }

    public function display_intro(Page $page)
    {
        $text = "
<div style='text-align: left;'>
<p>The first thing you'll probably want to do is create a new account; note
that the first account you create will by default be marked as the board's
administrator, and any further accounts will be regular users.

<p>Once logged in you can play with the settings, install extra features,
and of course start organising your images :-)

<p>This message will go away once your first image is uploaded~
</div>
";
        $page->set_title("Welcome to Shimmie ".VERSION);
        $page->set_heading("Welcome to Shimmie");
        $page->add_block(new Block("Installation Succeeded!", $text, "main", 0));
    }

    /**
     * #param Image[] $images
     */
    public function display_page(Page $page, array $images)
    {
        $this->display_page_header($page, $images);

        $nav = $this->build_navigation($this->page_number, $this->total_pages, $this->search_terms);
        $page->add_block(new Block("Navigation", $nav, "left", 0));

        if (count($images) > 0) {
            $this->display_page_images($page, $images);
        } else {
            $this->display_error(404, "No Images Found", "No images were found to match the search criteria");
        }
    }

    /**
     * #param string[] $parts
     */
    public function display_admin_block(array $parts)
    {
        global $page;
        $page->add_block(new Block("List Controls", join("<br>", $parts), "left", 50));
    }


    /**
     * #param string[] $search_terms
     */
    protected function build_navigation(int $page_number, int $total_pages, array $search_terms): string
    {
        $prev = $page_number - 1;
        $next = $page_number + 1;

        $u_tags = url_escape(Tag::implode($search_terms));
        $query = empty($u_tags) ? "" : '/'.$u_tags;


        $h_prev = ($page_number <= 1) ? "Prev" : '<a href="'.make_link('post/list'.$query.'/'.$prev).'">Prev</a>';
        $h_index = "<a href='".make_link()."'>Index</a>";
        $h_next = ($page_number >= $total_pages) ? "Next" : '<a href="'.make_link('post/list'.$query.'/'.$next).'">Next</a>';

        $h_search_string = html_escape(Tag::implode($search_terms));
        $h_search_link = make_link();
        $h_search = "
			<p><form action='$h_search_link' method='GET'>
				<input type='search' name='search' value='$h_search_string' placeholder='Search' class='autocomplete_tags' autocomplete='off' />
				<input type='hidden' name='q' value='/post/list'>
				<input type='submit' value='Find' style='display: none;' />
			</form>
		";

        return $h_prev.' | '.$h_index.' | '.$h_next.'<br>'.$h_search;
    }

    /**
     * #param Image[] $images
     */
    protected function build_table(array $images, ?string $query): string
    {
        $h_query = html_escape($query);
        $table = "<div class='shm-image-list' data-query='$h_query'>";
        foreach ($images as $image) {
            $table .= $this->build_thumb_html($image);
        }
        $table .= "</div>";
        return $table;
    }

    /**
     * #param Image[] $images
     */
    protected function display_page_header(Page $page, array $images)
    {
        global $config;

        if (count($this->search_terms) == 0) {
            $page_title = $config->get_string('title');
        } else {
            $search_string = implode(' ', $this->search_terms);
            $page_title = html_escape($search_string);
            if (count($images) > 0) {
                $page->set_subheading("Page {$this->page_number} / {$this->total_pages}");
            }
        }
        if ($this->page_number > 1 || count($this->search_terms) > 0) {
            // $page_title .= " / $page_number";
        }

        $page->set_title($page_title);
        $page->set_heading($page_title);
    }

    /**
     * #param Image[] $images
     */
    protected function display_page_images(Page $page, array $images)
    {
        if (count($this->search_terms) > 0) {
            if ($this->page_number > 3) {
                // only index the first pages of each term
                $page->add_html_header('<meta name="robots" content="noindex, nofollow">');
            }
            $query = url_escape(implode(' ', $this->search_terms));
            $page->add_block(new Block("Images", $this->build_table($images, "#search=$query"), "main", 10, "image-list"));
            $this->display_paginator($page, "post/list/$query", null, $this->page_number, $this->total_pages, true);
        } else {
            $page->add_block(new Block("Images", $this->build_table($images, null), "main", 10, "image-list"));
            $this->display_paginator($page, "post/list", null, $this->page_number, $this->total_pages, true);
        }
    }
}