<?php
// This file is part of Moodle - http://moodle.org/
//
// Moodle is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Moodle is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.

namespace theme_eadtraining\output;

use context_system;
use core_course\external\course_summary_exporter;
use core_message\api;
use core_message\helper;
use Exception;
use moodle_url;
use html_writer;
use theme_eadtraining\eadtrainingnavbar;
use user_picture;

/**
 * Renderers to align Moodle's HTML with that expected by Bootstrap
 *
 * @package   theme_eadtraining
 * @copyright 2025 Eduardo Kraus {@link https://eduardokraus.com}
 * @copyright based on work by 2012 Bas Brands, www.basbrands.nl
 * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */
class core_renderer extends \core_renderer {

    /**
     * Returns HTML to display a "Turn editing on/off" button in a form.
     *
     * @param moodle_url $url The URL + params to send through when clicking the button
     * @param string $method
     * @return string HTML the button
     * @throws Exception
     */
    public function edit_button(moodle_url $url, string $method = "post") {
        if ($this->page->theme->haseditswitch) {
            return;
        }
        $url->param("sesskey", sesskey());
        if ($this->page->user_is_editing()) {
            $url->param("edit", "off");
            $editstring = get_string("turneditingoff");
        } else {
            $url->param("edit", "on");
            $editstring = get_string("turneditingon");
        }
        $button = new \single_button($url, $editstring, $method, \single_button::BUTTON_PRIMARY);
        return $this->render_single_button($button);
    }

    /**
     * Renders the "breadcrumb" for all pages in boost.
     *
     * @return string the HTML for the navbar.
     * @throws Exception
     */
    public function navbar(): string {
        $newnav = new eadtrainingnavbar($this->page);
        return $this->render_from_template("core/navbar", $newnav);
    }

    /**
     * Renders the context header for the page.
     *
     * @param array $headerinfo Heading information.
     * @param int $headinglevel What 'h' level to make the heading.
     *
     * @return string A rendered context header.
     *
     * @throws Exception
     */
    public function context_header($headerinfo = null, $headinglevel = 1): string {
        global $DB, $USER, $CFG;
        require_once("{$CFG->dirroot}/user/lib.php");
        $context = $this->page->context;
        $imagedata = null;
        $userbuttons = null;

        // Make sure to use the heading if it has been set.
        if (isset($headerinfo["heading"])) {
            $heading = $headerinfo["heading"];
        } else {
            $heading = $this->page->heading;
        }

        // The user context currently has images and buttons. Other contexts may follow.
        if ((isset($headerinfo["user"]) || $context->contextlevel == CONTEXT_USER) && $this->page->pagetype !== "my-index") {
            if (isset($headerinfo["user"])) {
                $user = $headerinfo["user"];
            } else {
                // Look up the user information if it is not supplied.
                $user = $DB->get_record("user", ["id" => $context->instanceid]);
            }

            // If the user context is set, then use that for capability checks.
            if (isset($headerinfo["usercontext"])) {
                $context = $headerinfo["usercontext"];
            }

            // Only provide user information if the user is the current user, or a user which the current user can view.
            // When checking user_can_view_profile(), either:
            // If the page context is course, check the course context (from the page object) or;
            // If page context is NOT course, then check across all courses.
            $course = ($this->page->context->contextlevel == CONTEXT_COURSE) ? $this->page->course : null;

            if (user_can_view_profile($user, $course)) {
                // Use the user's full name if the heading isn't set.
                if (empty($heading)) {
                    $heading = fullname($user);
                }

                $imagedata = $this->user_picture($user, ["size" => 100]);

                // Check to see if we should be displaying a message button.
                if (!empty($CFG->messaging) && has_capability("moodle/site:sendmessage", $context)) {
                    $userbuttons = [
                        "messages" => [
                            "buttontype" => "message",
                            "title" => get_string("message", "message"),
                            "url" => new moodle_url("/message/index.php", ["id" => $user->id]),
                            "image" => "t/message",
                            "linkattributes" => helper::messageuser_link_params($user->id),
                            "page" => $this->page,
                        ],
                    ];

                    if ($USER->id != $user->id) {
                        $iscontact = api::is_contact($USER->id, $user->id);
                        $isrequested = api::get_contact_requests_between_users($USER->id, $user->id);
                        $contacturlaction = "";
                        $linkattributes = helper::togglecontact_link_params(
                            $user,
                            $iscontact,
                            true,
                            !empty($isrequested),
                        );
                        // If the user is not a contact.
                        if (!$iscontact) {
                            if ($isrequested) {
                                // We just need the first request.
                                $requests = array_shift($isrequested);
                                if ($requests->userid == $USER->id) {
                                    // If the user has requested to be a contact.
                                    $contacttitle = "contactrequestsent";
                                } else {
                                    // If the user has been requested to be a contact.
                                    $contacttitle = "waitingforcontactaccept";
                                }
                                $linkattributes = array_merge($linkattributes, [
                                    "class" => "disabled",
                                    "tabindex" => "-1",
                                ]);
                            } else {
                                // If the user is not a contact and has not requested to be a contact.
                                $contacttitle = "addtoyourcontacts";
                                $contacturlaction = "addcontact";
                            }
                            $contactimage = "t/addcontact";
                        } else {
                            // If the user is a contact.
                            $contacttitle = "removefromyourcontacts";
                            $contacturlaction = "removecontact";
                            $contactimage = "t/removecontact";
                        }
                        $userbuttons["togglecontact"] = [
                            "buttontype" => "togglecontact",
                            "title" => get_string($contacttitle, "message"),
                            "url" => new moodle_url("/message/index.php", [
                                "user1" => $USER->id,
                                "user2" => $user->id,
                                $contacturlaction => $user->id,
                                "sesskey" => sesskey(),
                            ]),
                            "image" => $contactimage,
                            "linkattributes" => $linkattributes,
                            "page" => $this->page,
                        ];
                    }

                    $this->page->requires->string_for_js("changesmadereallygoaway", "moodle");
                }
            } else {
                $heading = null;
            }
        }

        $prefix = null;
        if ($context->contextlevel == CONTEXT_MODULE) {
            if ($this->page->course->format === "singleactivity") {
                $heading = format_string($this->page->course->fullname, true, ["context" => $context]);
            } else {
                $heading = $this->page->cm->get_formatted_name();
                $iconurl = $this->page->cm->get_icon_url();
                $iconclass = $iconurl->get_param("filtericon") ? "" : "nofilter";
                $iconattrs = [
                    "class" => "icon activityicon $iconclass",
                    "aria-hidden" => "true",
                ];
                $imagedata = html_writer::img($iconurl->out(false), "", $iconattrs);
                $purposeclass = plugin_supports("mod", $this->page->activityname, FEATURE_MOD_PURPOSE);
                $purposeclass .= " activityiconcontainer icon-size-6";
                $purposeclass .= " modicon_" . $this->page->activityname;
                $isbranded = component_callback("mod_" . $this->page->activityname, "is_branded", [], false);
                $imagedata = html_writer::tag("div", $imagedata, ["class" => $purposeclass . ($isbranded ? " isbranded" : "")]);
                if (!empty($USER->editing)) {
                    $prefix = get_string("modulename", $this->page->activityname);
                }
            }
        }

        $contextheader = new \context_header($heading, $headinglevel, $imagedata, $userbuttons, $prefix);
        return $this->render($contextheader);
    }

    /**
     * See if this is the first view of the current cm in the session if it has fake blocks.
     *
     * (We track up to 100 cms so as not to overflow the session.)
     * This is done for drawer regions containing fake blocks so we can show blocks automatically.
     *
     * @return boolean true if the page has fakeblocks and this is the first visit.
     */
    public function firstview_fakeblocks(): bool {
        global $SESSION;

        $firstview = false;
        if ($this->page->cm) {
            if (!$this->page->blocks->region_has_fakeblocks("side-pre")) {
                return false;
            }
            if (!property_exists($SESSION, "firstview_fakeblocks")) {
                $SESSION->firstview_fakeblocks = [];
            }
            if (array_key_exists($this->page->cm->id, $SESSION->firstview_fakeblocks)) {
                $firstview = false;
            } else {
                $SESSION->firstview_fakeblocks[$this->page->cm->id] = true;
                $firstview = true;
                if (count($SESSION->firstview_fakeblocks) > 100) {
                    array_shift($SESSION->firstview_fakeblocks);
                }
            }
        }
        return $firstview;
    }

    /**
     * Wrapper for header elements.
     *
     * @return string HTML to display the main header.
     * @throws Exception
     */
    public function full_header() {
        global $DB, $CFG;

        $pagetype = $this->page->pagetype;
        $homepage = get_home_page();

        $homepagetype = null;
        // Add a special case since /my/courses is a part of the /my subsystem.
        if ($homepage == HOMEPAGE_MY || $homepage == HOMEPAGE_MYCOURSES) {
            $homepagetype = "my-index";
        } else {
            if ($homepage == HOMEPAGE_SITE) {
                $homepagetype = "site-index";
            }
        }
        if ($this->page->include_region_main_settings_in_header_actions() && !$this->page->blocks->is_block_present("settings")) {
            // Only include the region main settings if the page has requested it and it doesn't already have
            // the settings block on it. The region main settings are included in the settings block and
            // duplicating the content causes behat failures.
            $this->page->add_header_action(
                html_writer::div(
                    $this->region_main_settings_menu(),
                    "d-print-none",
                    ["id" => "region-main-settings-menu"]
                )
            );
        }

        $header = new \stdClass();
        $header->settingsmenu = $this->context_header_settings_menu();
        $header->contextheader = $this->context_header();
        $header->hasnavbar = empty($this->page->layout_options["nonavbar"]);
        $header->navbar = $this->navbar();
        $header->pageheadingbutton = $this->page_heading_button();
        $header->courseheader = $this->course_header();
        $header->headeractions = $this->page->get_header_actions();
        if (!empty($pagetype) && !empty($homepagetype) && $pagetype == $homepagetype) {
            $header->welcomemessage = \core_user::welcome_message();
        }

        $courseid = $this->page->course->id;

        $header->hasnavbarcourse = false;
        $header->hasbannercourse = false;
        $hasuri = strpos($_SERVER["REQUEST_URI"], "course/view.php") || strpos($_SERVER["REQUEST_URI"], "course/section.php");
        if ($hasuri) {
            $showcoursesummary = get_config("theme_eadtraining", "course_summary_banner");
            $showcoursesummarycourse = get_config("theme_eadtraining", "course_summary_banner_{$courseid}");
            if ($showcoursesummarycourse !== false) {
                $showcoursesummary = $showcoursesummarycourse;
            }

            if ($showcoursesummary) {
                if ($showcoursesummary == 1) {
                    $header->hasnavbarcourse = true;
                    $header->categoryname = $DB->get_field("course_categories", "name", ["id" => $this->page->course->category]);
                    $header->overviewfiles = $this->get_course_image();

                    if (has_capability("moodle/category:manage", $this->page->context)) {
                        $cache = \cache::make("theme_eadtraining", "course_cache");
                        $cachekey = "header_details_{$this->page->course->id}";
                        if ($cache->has($cachekey)) {
                            $header->details = json_decode($cache->get($cachekey));
                        } else {
                            $header->details = $this->get_details();
                            $cache->set($cachekey, json_encode($header->details));
                        }
                    }
                }
                if ($showcoursesummary == 2) {
                    $bannerfileurl = $this->get_course_image();
                    if ($bannerfileurl) {
                        $header->categoryname =
                            $DB->get_field("course_categories", "name", ["id" => $this->page->course->category]);
                        $header->hasbannercourse = true;
                        $header->banner_course_file_url = $bannerfileurl;
                    }
                }
            }

            $header->hasnosumary = !$header->hasbannercourse && !$header->hasnavbarcourse;

            if (has_capability("moodle/site:config", $this->page->context)) {
                $url = "{$CFG->wwwroot}/theme/eadtraining/quickstart/course-banner.php?courseid={$courseid}";
                $header->headeractions_banner_course_edithref = $url;
                $header->headeractions_banner_courseid = $courseid;
                $header->headeractions_banner_course_edit = true;
            }
        }

        return $this->render_from_template("theme_eadtraining/core/full_header", $header);
    }

    /**
     * get_details
     * @return array
     * @throws Exception
     */
    private function get_details() {
        global $DB;

        $decsep = get_string("decsep", "langconfig");
        $thousandssep = get_string("thousandssep", "langconfig");
        $details = [];

        // Students.
        $sql = "
            SELECT COUNT(DISTINCT userid)
              FROM {role_assignments}
             WHERE roleid    = 5
               AND contextid = :contextid";
        $total = $DB->get_field_sql($sql, ["contextid" => $this->page->context->id]);
        $details[] = [
            "id" => "users",
            "icon" => "fa-users fa-fw",
            "link" => false,
            "number" => number_format($total, 0, $decsep, $thousandssep),
            "text" => get_string("details-users", "theme_eadtraining"),
        ];

        // Teachers.
        $sql = "
            SELECT u.id, u.picture, u.firstname, u.lastname, u.firstnamephonetic, u.lastnamephonetic,
                   u.middlename, u.alternatename, u.imagealt, u.email
              FROM {role_assignments} ra
              JOIN {user}              u ON u.id = ra.userid
             WHERE ra.roleid    IN(3,4)
               AND ra.contextid = :contextid";
        $teachers = $DB->get_records_sql($sql, ["contextid" => $this->page->context->id]);
        if (count($teachers)) {
            $teachershtml = "";
            foreach ($teachers as $teacher) {
                // URL da imagem de perfil.
                $userpicture = new user_picture($teacher);
                $userpicture->size = 1; // 1 = small, 0 = large.
                $imgurl = $userpicture->get_url($this->page)->out(false);

                $name = fullname($teacher);
                $teachershtml .= "<div><img class='teacher-icon' src='{$imgurl}' alt='{$name}'></div>";
            }
            $details[] = [
                "id" => "teachers",
                "icon" => "fa fa-graduation-cap fa-fw",
                "link" => false,
                "number" => "<div class='d-flex'>{$teachershtml}</div>",
                "text" => get_string("details-teachers", "theme_eadtraining"),
            ];
        }

        // Completo e em progresso.
        $sql = "
            SELECT DISTINCT ra.userid, cc.timecompleted
              FROM {role_assignments}   ra
         LEFT JOIN {course_completions} cc ON cc.userid = ra.userid
                                          AND cc.course = :courseid
             WHERE ra.contextid = :contextid";
        $users = $DB->get_records_sql($sql, [
            "contextid" => $this->page->context->id,
            "courseid" => $this->page->course->id,
        ]);

        // Separa por status.
        $completaram = 0;
        $emprogresso = 0;

        foreach ($users as $user) {
            if (!empty($user->timecompleted)) {
                $completaram++;
            } else {
                $emprogresso++;
            }
        }

        $details[] = [
            "id" => "emprogresso",
            "icon" => "fa fa-spinner fa-fw",
            "link" => false,
            "number" => number_format($emprogresso, 0, $decsep, $thousandssep),
            "text" => get_string("details-emprogresso", "theme_eadtraining"),
        ];
        $details[] = [
            "id" => "completaram",
            "icon" => "fa fa-user-slash fa-fw",
            "link" => false,
            "number" => number_format($completaram, 0, $decsep, $thousandssep),
            "text" => get_string("details-completaram", "theme_eadtraining"),
        ];

        // Usuários que nunca acessaram.
        $sql = "
            SELECT COUNT(DISTINCT ra.userid) AS total
              FROM {role_assignments} ra
         LEFT JOIN {user_lastaccess}  la ON la.userid = ra.userid
             WHERE ra.contextid = :contextid
               AND la.timeaccess IS NULL";
        $total = $DB->get_field_sql($sql, ["contextid" => $this->page->context->id]);
        $details[] = [
            "id" => "not-access",
            "icon" => "fa fa-user-slash fa-fw",
            "link" => false,
            "number" => number_format($total, 0, $decsep, $thousandssep),
            "text" => get_string("details-not-access", "theme_eadtraining"),
        ];

        return $details;
    }

    /**
     * get_course_image
     *
     * @return false|string
     * @throws Exception
     */
    public function get_course_image() {
        $course = ($this->page->context->contextlevel == CONTEXT_COURSE) ? $this->page->course : null;
        if (!$course) {
            return false;
        }
        $bannerfileurl = theme_eadtraining_setting_file_url("banner_course_file_{$course->id}");
        if ($bannerfileurl) {
            return $bannerfileurl->out();
        }
        $bannerfileurl = theme_eadtraining_setting_file_url("banner_course_file");

        if ($bannerfileurl) {
            return $bannerfileurl->out();
        }

        if ($course) {
            return course_summary_exporter::get_course_image($course);
        }

        return false;
    }

    /**
     * Whether we should display the logo in the navbar.
     *
     * We will when there are no main logos, and we have compact logo.
     *
     * @return bool
     * @throws Exception
     */
    public function should_display_navbar_logo() {
        $logo = $this->get_compact_logo_url();
        return !empty($logo);
    }

    /**
     * Return the site's compact logo URL, if any.
     *
     * @param int $maxwidth The maximum width, or null when the maximum width does not matter.
     * @param int $maxheight The maximum height, or null when the maximum height does not matter.
     *
     * @return moodle_url|false
     *
     * @throws Exception
     */
    public function get_compact_logo_url($maxwidth = 300, $maxheight = 300) {
        static $return = null;
        if ($return !== null) {
            return $return;
        }

        $callbacks = get_plugins_with_function("theme_eadtraining_get_logo");
        foreach ($callbacks as $plugintype => $plugins) {
            foreach ($plugins as $plugin => $callback) {
                $urllogo = $callback();

                if ($urllogo) {
                    return $return = $urllogo->out(false);
                }
            }
        }

        $logo = get_config("core_admin", "logocompact");
        if (empty($logo)) {
            return $return = false;
        }

        // Hide the requested size in the file path.
        $filepath = ((int)$maxwidth . "x" . (int)$maxheight) . "/";

        // Use $CFG->themerev to prevent browser caching when the file changes.
        return $return = moodle_url::make_pluginfile_url(
            context_system::instance()->id,
            "core_admin",
            "logocompact",
            $filepath,
            theme_get_revision(),
            $logo
        );
    }

    /**
     * Get the course pattern image URL.
     *
     * @param int $courseid course id
     * @return string URL of the course pattern image in SVG format
     * @throws Exception
     */
    public function get_default_image_for_courseid($courseid): string {
        $animate = get_config("theme_eadtraining", "svg_animate");
        $imageid = "svg-courseid-{$courseid}-" . uniqid();
        $this->page->requires->js_call_amd("theme_eadtraining/default_image", "generateimage", [$imageid, $courseid, $animate]);

        $imagesvg = "<svg xmlns='http://www.w3.org/2000/svg' id={$imageid}></svg>";
        return "data:image/svg+xml;utf8,{$imagesvg}";
    }

    /**
     * Brandcolor background menu class
     * @return string
     * @throws Exception
     */
    public function brandcolor_background_menu_class() {
        $background = get_config("theme_eadtraining", "brandcolor_background_menu");
        return $background ? "brandcolor-background" : "";
    }
}
