<?php

class Tips extends Extension
{
    public function onDatabaseUpgrade(DatabaseUpgradeEvent $event)
    {
        global $config, $database;

        if ($config->get_int("ext_tips_version") < 1) {
            $database->create_table("tips", "
					id SCORE_AIPK,
					enable SCORE_BOOL NOT NULL DEFAULT SCORE_BOOL_N,
					image TEXT NOT NULL,
					text TEXT NOT NULL,
					");

            $database->execute(
                "
					INSERT INTO tips (enable, image, text)
					VALUES (?, ?, ?)",
                ["Y", "coins.png", "Do you like this extension? Please support us for developing new ones. <a href=\"https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=8235933\" target=\"_blank\">Donate through paypal</a>."]
            );

            $config->set_int("ext_tips_version", 1);
            log_info("tips", "extension installed");
        }
    }

    public function onPageRequest(PageRequestEvent $event)
    {
        global $page, $user;

        $this->getTip();

        if ($event->page_matches("tips") && $user->can(Permissions::TIPS_ADMIN)) {
            switch ($event->get_arg(0)) {
                case "list":
                    $this->manageTips();
                    $this->getAll();
                    break;
                case "save":
                    if ($user->check_auth_token()) {
                        $this->saveTip();
                        $page->set_mode(PageMode::REDIRECT);
                        $page->set_redirect(make_link("tips/list"));
                    }
                    break;
                case "status":
                    // FIXME: HTTP GET CSRF
                    $tipID = int_escape($event->get_arg(1));
                    $this->setStatus($tipID);
                    $page->set_mode(PageMode::REDIRECT);
                    $page->set_redirect(make_link("tips/list"));
                    break;
                case "delete":
                    // FIXME: HTTP GET CSRF
                    $tipID = int_escape($event->get_arg(1));
                    $this->deleteTip($tipID);
                    $page->set_mode(PageMode::REDIRECT);
                    $page->set_redirect(make_link("tips/list"));
                    break;
            }
        }
    }

    public function onPageSubNavBuilding(PageSubNavBuildingEvent $event)
    {
        global $user;
        if ($event->parent==="system") {
            if ($user->can(Permissions::TIPS_ADMIN)) {
                $event->add_nav_link("tips", new Link('tips/list'), "Tips Editor");
            }
        }
    }

    public function onUserBlockBuilding(UserBlockBuildingEvent $event)
    {
        global $user;
        if ($user->can(Permissions::TIPS_ADMIN)) {
            $event->add_link("Tips Editor", make_link("tips/list"));
        }
    }

    private function manageTips()
    {
        $data_href = get_base_href();
        $url = $data_href."/ext/tips/images/";

        $dirPath = dir('./ext/tips/images');
        $images = [];
        while (($file = $dirPath->read()) !== false) {
            if ($file[0] != ".") {
                $images[] = trim($file);
            }
        }
        $dirPath->close();
        sort($images);

        $this->theme->manageTips($url, $images);
    }

    private function saveTip()
    {
        global $database;

        $enable = isset($_POST["enable"]) ? "Y" : "N";
        $image = html_escape($_POST["image"]);
        $text = $_POST["text"];

        $database->execute(
            "
				INSERT INTO tips (enable, image, text)
				VALUES (?, ?, ?)",
            [$enable, $image, $text]
        );
    }

    private function getTip()
    {
        global $database;

        $data_href = get_base_href();
        $url = $data_href."/ext/tips/images/";

        $tip = $database->get_row("SELECT * ".
                "FROM tips ".
                "WHERE enable = 'Y' ".
                "ORDER BY RAND() ".
                "LIMIT 1");

        if ($tip) {
            $this->theme->showTip($url, $tip);
        }
    }

    private function getAll()
    {
        global $database;

        $data_href = get_base_href();
        $url = $data_href."/ext/tips/images/";

        $tips = $database->get_all("SELECT * FROM tips ORDER BY id ASC");

        $this->theme->showAll($url, $tips);
    }

    private function setStatus(int $tipID)
    {
        global $database;

        $tip = $database->get_row("SELECT * FROM tips WHERE id = ? ", [int_escape($tipID)]);

        if (bool_escape($tip['enable'])) {
            $enable = "N";
        } else {
            $enable = "Y";
        }

        $database->execute("UPDATE tips SET enable = ? WHERE id = ?", [$enable, int_escape($tipID)]);
    }

    private function deleteTip(int $tipID)
    {
        global $database;
        $database->execute("DELETE FROM tips WHERE id = ?", [int_escape($tipID)]);
    }
}