<?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/>.

/**
 * format_topics related unit tests
 *
 * @package    format_topics
 * @copyright  2015 Marina Glancy
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */

defined('MOODLE_INTERNAL') || die();

global $CFG;
require_once($CFG->dirroot . '/course/lib.php');

/**
 * format_topics related unit tests
 *
 * @package    format_topics
 * @copyright  2015 Marina Glancy
 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */
class format_topics_testcase extends advanced_testcase {

    public function test_update_course_numsections() {
        global $DB;
        $this->resetAfterTest(true);

        $generator = $this->getDataGenerator();

        $course = $generator->create_course(array('numsections' => 10, 'format' => 'topics'),
            array('createsections' => true));
        $generator->create_module('assign', array('course' => $course, 'section' => 7));

        $this->setAdminUser();

        $this->assertEquals(11, $DB->count_records('course_sections', array('course' => $course->id)));

        // Change the numsections to 8, last two sections did not have any activities, they should be deleted.
        update_course((object)array('id' => $course->id, 'numsections' => 8));
        $this->assertEquals(9, $DB->count_records('course_sections', array('course' => $course->id)));
        $this->assertEquals(9, count(get_fast_modinfo($course)->get_section_info_all()));

        // Change the numsections to 5, section 8 should be deleted but section 7 should remain as it has activities.
        update_course((object)array('id' => $course->id, 'numsections' => 6));
        $this->assertEquals(8, $DB->count_records('course_sections', array('course' => $course->id)));
        $this->assertEquals(8, count(get_fast_modinfo($course)->get_section_info_all()));
        $this->assertEquals(6, course_get_format($course)->get_course()->numsections);
    }

    /**
     * Tests for format_topics::get_section_name method with default section names.
     */
    public function test_get_section_name() {
        global $DB;
        $this->resetAfterTest(true);

        // Generate a course with 5 sections.
        $generator = $this->getDataGenerator();
        $numsections = 5;
        $course = $generator->create_course(array('numsections' => $numsections, 'format' => 'topics'),
            array('createsections' => true));

        // Get section names for course.
        $coursesections = $DB->get_records('course_sections', array('course' => $course->id));

        // Test get_section_name with default section names.
        $courseformat = course_get_format($course);
        foreach ($coursesections as $section) {
            // Assert that with unmodified section names, get_section_name returns the same result as get_default_section_name.
            $this->assertEquals($courseformat->get_default_section_name($section), $courseformat->get_section_name($section));
        }
    }

    /**
     * Tests for format_topics::get_section_name method with modified section names.
     */
    public function test_get_section_name_customised() {
        global $DB;
        $this->resetAfterTest(true);

        // Generate a course with 5 sections.
        $generator = $this->getDataGenerator();
        $numsections = 5;
        $course = $generator->create_course(array('numsections' => $numsections, 'format' => 'topics'),
            array('createsections' => true));

        // Get section names for course.
        $coursesections = $DB->get_records('course_sections', array('course' => $course->id));

        // Modify section names.
        $customname = "Custom Section";
        foreach ($coursesections as $section) {
            $section->name = "$customname $section->section";
            $DB->update_record('course_sections', $section);
        }

        // Requery updated section names then test get_section_name.
        $coursesections = $DB->get_records('course_sections', array('course' => $course->id));
        $courseformat = course_get_format($course);
        foreach ($coursesections as $section) {
            // Assert that with modified section names, get_section_name returns the modified section name.
            $this->assertEquals($section->name, $courseformat->get_section_name($section));
        }
    }

    /**
     * Tests for format_topics::get_default_section_name.
     */
    public function test_get_default_section_name() {
        global $DB;
        $this->resetAfterTest(true);

        // Generate a course with 5 sections.
        $generator = $this->getDataGenerator();
        $numsections = 5;
        $course = $generator->create_course(array('numsections' => $numsections, 'format' => 'topics'),
            array('createsections' => true));

        // Get section names for course.
        $coursesections = $DB->get_records('course_sections', array('course' => $course->id));

        // Test get_default_section_name with default section names.
        $courseformat = course_get_format($course);
        foreach ($coursesections as $section) {
            if ($section->section == 0) {
                $sectionname = get_string('section0name', 'format_topics');
                $this->assertEquals($sectionname, $courseformat->get_default_section_name($section));
            } else {
                $sectionname = get_string('sectionname', 'format_topics') . ' ' . $section->section;
                $this->assertEquals($sectionname, $courseformat->get_default_section_name($section));
            }
        }
    }

    /**
     * Test web service updating section name
     */
    public function test_update_inplace_editable() {
        global $CFG, $DB, $PAGE;
        require_once($CFG->dirroot . '/lib/external/externallib.php');

        $this->resetAfterTest();
        $user = $this->getDataGenerator()->create_user();
        $this->setUser($user);
        $course = $this->getDataGenerator()->create_course(array('numsections' => 5, 'format' => 'topics'),
            array('createsections' => true));
        $section = $DB->get_record('course_sections', array('course' => $course->id, 'section' => 2));

        // Call webservice without necessary permissions.
        try {
            core_external::update_inplace_editable('format_topics', 'sectionname', $section->id, 'New section name');
            $this->fail('Exception expected');
        } catch (moodle_exception $e) {
            $this->assertEquals('Course or activity not accessible. (Not enrolled)',
                    $e->getMessage());
        }

        // Change to teacher and make sure that section name can be updated using web service update_inplace_editable().
        $teacherrole = $DB->get_record('role', array('shortname' => 'editingteacher'));
        $this->getDataGenerator()->enrol_user($user->id, $course->id, $teacherrole->id);

        $res = core_external::update_inplace_editable('format_topics', 'sectionname', $section->id, 'New section name');
        $res = external_api::clean_returnvalue(core_external::update_inplace_editable_returns(), $res);
        $this->assertEquals('New section name', $res['value']);
        $this->assertEquals('New section name', $DB->get_field('course_sections', 'name', array('id' => $section->id)));
    }

    /**
     * Test callback updating section name
     */
    public function test_inplace_editable() {
        global $DB, $PAGE;

        $this->resetAfterTest();
        $user = $this->getDataGenerator()->create_user();
        $course = $this->getDataGenerator()->create_course(array('numsections' => 5, 'format' => 'topics'),
            array('createsections' => true));
        $teacherrole = $DB->get_record('role', array('shortname' => 'editingteacher'));
        $this->getDataGenerator()->enrol_user($user->id, $course->id, $teacherrole->id);
        $this->setUser($user);

        $section = $DB->get_record('course_sections', array('course' => $course->id, 'section' => 2));

        // Call callback format_topics_inplace_editable() directly.
        $tmpl = component_callback('format_topics', 'inplace_editable', array('sectionname', $section->id, 'Rename me again'));
        $this->assertInstanceOf('core\output\inplace_editable', $tmpl);
        $res = $tmpl->export_for_template($PAGE->get_renderer('core'));
        $this->assertEquals('Rename me again', $res['value']);
        $this->assertEquals('Rename me again', $DB->get_field('course_sections', 'name', array('id' => $section->id)));

        // Try updating using callback from mismatching course format.
        try {
            $tmpl = component_callback('format_weeks', 'inplace_editable', array('sectionname', $section->id, 'New name'));
            $this->fail('Exception expected');
        } catch (moodle_exception $e) {
            $this->assertEquals(1, preg_match('/^Can not find data record in database/', $e->getMessage()));
        }
    }
}