<?php
// This file is part of the Studyplan plugin for Moodle
//
// 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 <https://www.gnu.org/licenses/>.
/**
 * View study plans - teacher view and student view
 * @package    local_treestudyplan
 * @copyright  2023 P.M. Kuipers
 * @license    https://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

require_once("../../config.php");

use \local_treestudyplan\courseservice;

require_once($CFG->libdir.'/weblib.php');

$systemcontext = context_system::instance();

$PAGE->set_url("/local/treestudyplan/view-plan.php", array());
require_login();

// Figure out the context (category or system, based on either category or context parameter).
$categoryid = optional_param('categoryid', 0, PARAM_INT); // Category id.
$contextid = optional_param('contextid', 0, PARAM_INT); // Context id.
if ($categoryid > 0) {
    $studyplancontext = context_coursecat::instance($categoryid);

} else if ($contextid > 0) {
    $studyplancontext = context::instance_by_id($contextid);
    if (in_array($studyplancontext->contextlevel, [CONTEXT_SYSTEM, CONTEXT_COURSECAT])) {
        $categoryid = $studyplancontext->instanceid;
    } else {
        $studyplancontext = $systemcontext;
    }
} else {
    // If no context is selected, find the first available one.
    $availablecontexts = courseservice::list_accessible_categories_with_usage("view");
    $contextid = 1; // Fallback to system context.
    foreach ($availablecontexts as $ctx) {
        if ($ctx->count > 0) {
            $contextid = $ctx->ctxid;
            break;
        }
    }
    // Reload page with selected category.
    $url = new \moodle_url('/local/treestudyplan/view-plan.php', ["contextid" => $contextid]);
    header('Location: '.$url->out(false), true, 302);
    exit;
}

require_capability('local/treestudyplan:viewuserreports', $studyplancontext);
$contextname = $studyplancontext->get_context_name(false, false);

$PAGE->set_pagelayout('base');
$PAGE->set_context($studyplancontext);
$PAGE->set_title(get_string('view_plan', 'local_treestudyplan')." - ".$contextname);
$PAGE->set_heading(get_string('view_plan', 'local_treestudyplan')." - ".$contextname);

if ($studyplancontext->id > 1) {
    navigation_node::override_active_url(new moodle_url('/course/index.php', ['categoryid' => $categoryid ]));
    $PAGE->navbar->add(get_string('view_plan', 'local_treestudyplan'));
}

// Load javascripts and specific css.
$PAGE->requires->css(new moodle_url($CFG->wwwroot.'/local/treestudyplan/css/bootstrap-vue/bootstrap-vue.css'));
if($CFG->debugdeveloper){
    $PAGE->requires->css(new moodle_url($CFG->wwwroot.'/local/treestudyplan/css/devstyles.css'));
}
$PAGE->requires->js_call_amd('local_treestudyplan/page-view-plan', 'init', [$studyplancontext->id, $categoryid]);

/**
 * Shortcut function to provide translations
 *
 * @param mixed $str Translation key
 * @param null|string[] $param Parameters to pass to translation
 * @param string $plugin Location to search for translation strings
 * @return string Translation of key
 */
function t($str, $param = null, $plugin = 'local_treestudyplan') {
    print get_string($str, $plugin, $param);
}

print $OUTPUT->header();
?>
<div id='root'>
    <div class='vue-loader' v-show='false'>
        <div class="spinner-border text-primary" role="status">
            <span class="sr-only">Loading...</span>
        </div>
    </div>
    <div v-cloak>
        <div v-if='!activestudyplan && usedcontexts' class='ml-3 mb-3'>
            <b-form-select text='<?php print($contextname);?>' :value="contextid">
                <b-form-select-option v-for='ctx in usedcontexts' :key='ctx.id' :value="ctx.context_id" @click='switchContext(ctx)'
                    :active="ctx.context_id == contextid" :class="(ctx.studyplancount > 0) ? 'font-weight-bold' : ''"
                ><span v-for="(p, i) in ctx.category.path"><span v-if="i>0"> / </span>{{ p }}</span>
                 <span>({{ ctx.studyplancount }})</span></b-form-select-option>
            </b-form-select>
        </div>
        <h3 v-else><?php print $contextname; ?></h3>
        <div class="m-buttonbar" style="margin-bottom: 1em;">
            <a href='#' v-if='displayedstudyplan' @click.prevent='closeStudyplan'
                ><i style='font-size: 150%;' class='fa fa-chevron-left'></i> <?php t('back');?></a>
            <span v-if='displayedstudyplan'><?php t("studyplan_select"); ?></span>&nbsp;
            <b-form-select v-if='displayedstudyplan' lazy :text='dropdown_title' :value='displayedstudyplan.id'>
                <b-form-select-option
                    v-for='(studyplan, planindex) in studyplans'
                    :key='studyplan.id'
                    @click='selectStudyplan(studyplan)'
                    :value='studyplan.id'
                    >{{ studyplan.name }}</b-form-select-option>
            </b-form-select>&nbsp;
            <b-button variant='primary' v-b-toggle.toolbox-sidebar
                ><?php t('selectstudent_btn') ?></b-button>
        </div>
        <div class='t-studyplan-container'>
            <h2 v-if='displayedstudyplan&& selectedstudent'
                >{{selectedstudent.firstname}} {{selectedstudent.lastname}} - {{displayedstudyplan.name}}</h2>
            <h2 v-else-if='displayedstudyplan'><?php t("showoverview"); ?> - {{displayedstudyplan.name}}</h2>
            <r-studyplan v-if='!loadingstudyplan && displayedstudyplan'
                         v-model='displayedstudyplan' :teachermode='!selectedstudent'
                ></r-studyplan>
            <div v-else-if='loadingstudyplan' class="spinner-border text-primary" role="status">
                <span class="sr-only">Loading...</span>
            </div>
            <div v-else class='t-studyplan-notselected'>
                <p><?php t("studyplan_noneselected"); ?></p>
                <b-card-group deck>
                    <s-studyplan-card
                        v-for='(studyplan, planindex) in studyplans'
                        :key='studyplan.id'
                        v-model='studyplans[planindex]'
                        open
                        @open='selectStudyplan(studyplan)'
                        ></s-studyplan-card>
                </b-card-group>
            </div>
        </div>
        <b-sidebar
            id="toolbox-sidebar"
            right
            shadow
            title='<?php t("selectstudent")?>'
        >
            <div class='m-2'><?php t("selectstudent_details")?></div>
            <b-list-group v-if="associatedstudents">
                <b-list-group-item :active="! selectedstudent"
                        button
                        variant="primary"
                        @click='showOverview()'
                    >
                        <?php t("showoverview"); ?>
                </b-list-group-item>
                <b-list-group-item v-for="student in associatedstudents" :key="student.id"
                    :active="selectedstudent && student.id == selectedstudent.id"
                    button
                    @click='showStudentView(student)'
                >
                    {{student.firstname}} {{student.lastname}}
                </b-list-group-item>
            </b-list-group>
        </b-sidebar>
    </div>
</div>
<?php

print $OUTPUT->footer();