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<?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/>.

declare(strict_types=1);

namespace core_reportbuilder\local\helpers;

use advanced_testcase;
use invalid_parameter_exception;
use core_cohort\reportbuilder\audience\cohortmember;
use core_reportbuilder_generator;
use core_reportbuilder\local\models\schedule as model;
use core_reportbuilder\reportbuilder\audience\manual;
use core_user\reportbuilder\datasource\users;

/**
 * Unit tests for the schedule helper class
 *
 * @package     core_reportbuilder
 * @covers      \core_reportbuilder\local\helpers\schedule
 * @copyright   2021 Paul Holden <paulh@moodle.com>
 * @license     http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
 */
class schedule_test extends advanced_testcase {

    /**
     * Test create schedule
     */
    public function test_create_schedule(): void {
        $this->resetAfterTest();
        $this->setAdminUser();

        /** @var core_reportbuilder_generator $generator */
        $generator = $this->getDataGenerator()->get_plugin_generator('core_reportbuilder');
        $report = $generator->create_report(['name' => 'My report', 'source' => users::class]);

        $timescheduled = time() + DAYSECS;
        $schedule = schedule::create_schedule((object) [
            'name' => 'My schedule',
            'reportid' => $report->get('id'),
            'format' => 'csv',
            'subject' => 'Hello',
            'message' => 'Hola',
            'timescheduled' => $timescheduled,
        ]);

        $this->assertEquals('My schedule', $schedule->get('name'));
        $this->assertEquals($report->get('id'), $schedule->get('reportid'));
        $this->assertEquals('csv', $schedule->get('format'));
        $this->assertEquals('Hello', $schedule->get('subject'));
        $this->assertEquals('Hola', $schedule->get('message'));
        $this->assertEquals($timescheduled, $schedule->get('timescheduled'));
        $this->assertEquals($timescheduled, $schedule->get('timenextsend'));
    }

    /**
     * Test update schedule
     */
    public function test_update_schedule(): void {
        $this->resetAfterTest();
        $this->setAdminUser();

        /** @var core_reportbuilder_generator $generator */
        $generator = $this->getDataGenerator()->get_plugin_generator('core_reportbuilder');
        $report = $generator->create_report(['name' => 'My report', 'source' => users::class]);
        $schedule = $generator->create_schedule(['reportid' => $report->get('id'), 'name' => 'My schedule']);

        // Update some record properties.
        $record = $schedule->to_record();
        $record->name = 'My updated schedule';
        $record->timescheduled = 1861340400; // 25/12/2028 07:00 UTC.

        $schedule = schedule::update_schedule($record);
        $this->assertEquals($record->name, $schedule->get('name'));
        $this->assertEquals($record->timescheduled, $schedule->get('timescheduled'));
    }

    /**
     * Test update invalid schedule
     */
    public function test_update_schedule_invalid(): void {
        $this->resetAfterTest();
        $this->setAdminUser();

        /** @var core_reportbuilder_generator $generator */
        $generator = $this->getDataGenerator()->get_plugin_generator('core_reportbuilder');
        $report = $generator->create_report(['name' => 'My report', 'source' => users::class]);

        $this->expectException(invalid_parameter_exception::class);
        $this->expectExceptionMessage('Invalid schedule');
        schedule::update_schedule((object) ['id' => 42, 'reportid' => $report->get('id')]);
    }

    /**
     * Test toggle schedule
     */
    public function test_toggle_schedule(): void {
        $this->resetAfterTest();
        $this->setAdminUser();

        /** @var core_reportbuilder_generator $generator */
        $generator = $this->getDataGenerator()->get_plugin_generator('core_reportbuilder');
        $report = $generator->create_report(['name' => 'My report', 'source' => users::class]);
        $schedule = $generator->create_schedule(['reportid' => $report->get('id'), 'name' => 'My schedule']);

        // Disable the schedule.
        schedule::toggle_schedule($report->get('id'), $schedule->get('id'), false);
        $schedule = $schedule->read();
        $this->assertFalse($schedule->get('enabled'));

        // Enable the schedule.
        schedule::toggle_schedule($report->get('id'), $schedule->get('id'), true);
        $schedule = $schedule->read();
        $this->assertTrue($schedule->get('enabled'));
    }

    /**
     * Test toggle invalid schedule
     */
    public function test_toggle_schedule_invalid(): void {
        $this->resetAfterTest();
        $this->setAdminUser();

        /** @var core_reportbuilder_generator $generator */
        $generator = $this->getDataGenerator()->get_plugin_generator('core_reportbuilder');
        $report = $generator->create_report(['name' => 'My report', 'source' => users::class]);

        $this->expectException(invalid_parameter_exception::class);
        $this->expectExceptionMessage('Invalid schedule');
        schedule::toggle_schedule($report->get('id'), 42, true);
    }

    /**
     * Test delete schedule
     */
    public function test_delete_schedule(): void {
        $this->resetAfterTest();
        $this->setAdminUser();

        /** @var core_reportbuilder_generator $generator */
        $generator = $this->getDataGenerator()->get_plugin_generator('core_reportbuilder');
        $report = $generator->create_report(['name' => 'My report', 'source' => users::class]);
        $schedule = $generator->create_schedule(['reportid' => $report->get('id'), 'name' => 'My schedule']);

        $scheduleid = $schedule->get('id');

        schedule::delete_schedule($report->get('id'), $scheduleid);
        $this->assertFalse($schedule::record_exists($scheduleid));
    }

    /**
     * Test delete invalid schedule
     */
    public function test_delete_schedule_invalid(): void {
        $this->resetAfterTest();
        $this->setAdminUser();

        /** @var core_reportbuilder_generator $generator */
        $generator = $this->getDataGenerator()->get_plugin_generator('core_reportbuilder');
        $report = $generator->create_report(['name' => 'My report', 'source' => users::class]);

        $this->expectException(invalid_parameter_exception::class);
        $this->expectExceptionMessage('Invalid schedule');
        schedule::delete_schedule($report->get('id'), 42);
    }

    /**
     * Test getting schedule report users (those in matching audience)
     */
    public function test_get_schedule_report_users(): void {
        $this->resetAfterTest();

        /** @var core_reportbuilder_generator $generator */
        $generator = $this->getDataGenerator()->get_plugin_generator('core_reportbuilder');
        $report = $generator->create_report(['name' => 'My report', 'source' => users::class]);

        // Create cohort, with some members.
        $cohort = $this->getDataGenerator()->create_cohort();
        $cohortuserone = $this->getDataGenerator()->create_user(['firstname' => 'Zoe', 'lastname' => 'Zebra']);
        cohort_add_member($cohort->id, $cohortuserone->id);
        $cohortusertwo = $this->getDataGenerator()->create_user(['firstname' => 'Henrietta', 'lastname' => 'Hamster']);
        cohort_add_member($cohort->id, $cohortusertwo->id);

        // Create a third user, to be added manually.
        $manualuserone = $this->getDataGenerator()->create_user(['firstname' => 'Bob', 'lastname' => 'Badger']);

        $audiencecohort = $generator->create_audience([
            'reportid' => $report->get('id'),
            'classname' => cohortmember::class,
            'configdata' => ['cohorts' => [$cohort->id]],
        ]);

        $audiencemanual = $generator->create_audience([
            'reportid' => $report->get('id'),
            'classname' => manual::class,
            'configdata' => ['users' => [$manualuserone->id]],
        ]);

        // Now create our schedule.
        $schedule = $generator->create_schedule([
            'reportid' => $report->get('id'),
            'name' => 'My schedule',
            'audiences' => json_encode([
                $audiencecohort->get_persistent()->get('id'),
                $audiencemanual->get_persistent()->get('id'),
            ]),
        ]);

        $users = schedule::get_schedule_report_users($schedule);
        $this->assertEquals([
            'Bob',
            'Henrietta',
            'Zoe',
        ], array_column($users, 'firstname'));

        // Now delete one of our users, ensure they are no longer returned.
        delete_user($manualuserone);

        $users = schedule::get_schedule_report_users($schedule);
        $this->assertEquals([
            'Henrietta',
            'Zoe',
        ], array_column($users, 'firstname'));
    }

    /**
     * Test getting schedule report row count
     */
    public function test_get_schedule_report_count(): void {
        $this->resetAfterTest();

        /** @var core_reportbuilder_generator $generator */
        $generator = $this->getDataGenerator()->get_plugin_generator('core_reportbuilder');
        $report = $generator->create_report(['name' => 'My report', 'source' => users::class]);
        $schedule = $generator->create_schedule(['reportid' => $report->get('id'), 'name' => 'My schedule']);

        // There is only one row in the report (the only user on the site).
        $count = schedule::get_schedule_report_count($schedule);
        $this->assertEquals(1, $count);
    }

    /**
     * Data provider for {@see test_get_schedule_report_file}
     *
     * @return string[]
     */
    public function get_schedule_report_file_format(): array {
        return [
            ['csv'],
            ['excel'],
            ['html'],
            ['json'],
            ['ods'],
            ['pdf'],
        ];
    }

    /**
     * Test getting schedule report exported file, in each supported format
     *
     * @param string $format
     *
     * @dataProvider get_schedule_report_file_format
     */
    public function test_get_schedule_report_file(string $format): void {
        $this->resetAfterTest();
        $this->setAdminUser();

        /** @var core_reportbuilder_generator $generator */
        $generator = $this->getDataGenerator()->get_plugin_generator('core_reportbuilder');
        $report = $generator->create_report(['name' => 'My report', 'source' => users::class]);
        $schedule = $generator->create_schedule(['reportid' => $report->get('id'), 'name' => 'My schedule', 'format' => $format]);

        // There is only one row in the report (the only user on the site).
        $file = schedule::get_schedule_report_file($schedule);
        $this->assertGreaterThan(64, $file->get_filesize());
    }

    /**
     * Data provider for {@see test_should_send_schedule}
     *
     * @return array[]
     */
    public function should_send_schedule_provider(): array {
        $time = time();

        // We just need large offsets for dates in the past/future.
        $yesterday = $time - DAYSECS;
        $tomorrow = $time + DAYSECS;

        return [
            'Disabled' => [[
                'enabled' => false,
            ], false],
            'Time scheduled in the past' => [[
                'recurrence' => model::RECURRENCE_NONE,
                'timescheduled' => $yesterday,
            ], true],
            'Time scheduled in the past, already sent prior to schedule' => [[
                'recurrence' => model::RECURRENCE_NONE,
                'timescheduled' => $yesterday,
                'timelastsent' => $yesterday - HOURSECS,
            ], true],
            'Time scheduled in the past, already sent on schedule' => [[
                'recurrence' => model::RECURRENCE_NONE,
                'timescheduled' => $yesterday,
                'timelastsent' => $yesterday,
            ], false],
            'Time scheduled in the future' => [[
                'recurrence' => model::RECURRENCE_NONE,
                'timescheduled' => $tomorrow,
            ], false],
            'Time scheduled in the future, already sent prior to schedule' => [[
                'recurrence' => model::RECURRENCE_NONE,
                'timelastsent' => $yesterday,
                'timescheduled' => $tomorrow,
            ], false],
            'Next send in the past' => [[
                'recurrence' => model::RECURRENCE_DAILY,
                'timescheduled' => $yesterday,
                'timenextsend' => $yesterday,
            ], true],
            'Next send in the future' => [[
                'recurrence' => model::RECURRENCE_DAILY,
                'timescheduled' => $yesterday,
                'timenextsend' => $tomorrow,
            ], false],
        ];
    }

    /**
     * Test for whether a schedule should be sent
     *
     * @param array $properties
     * @param bool $expected
     *
     * @dataProvider should_send_schedule_provider
     */
    public function test_should_send_schedule(array $properties, bool $expected): void {
        $this->resetAfterTest();

        /** @var core_reportbuilder_generator $generator */
        $generator = $this->getDataGenerator()->get_plugin_generator('core_reportbuilder');
        $report = $generator->create_report(['name' => 'My report', 'source' => users::class]);

        $schedule = $generator->create_schedule(['reportid' => $report->get('id'), 'name' => 'My schedule'] + $properties);

        // If "Time next send" is specified, then override calculated value.
        if (array_key_exists('timenextsend', $properties)) {
            $schedule->set('timenextsend', $properties['timenextsend']);
        }

        $this->assertEquals($expected, schedule::should_send_schedule($schedule));
    }

    /**
     * Data provider for {@see test_calculate_next_send_time}
     *
     * @return array[]
     */
    public function calculate_next_send_time_provider(): array {
        $timescheduled = 1635865200; // Tue Nov 02 2021 15:00:00 GMT+0000.
        $timenow = 1639846800; // Sat Dec 18 2021 17:00:00 GMT+0000.

        return [
            'No recurrence' => [model::RECURRENCE_NONE, $timescheduled, $timenow, $timescheduled],
            'Recurrence, time scheduled in future' => [model::RECURRENCE_DAILY, $timenow + DAYSECS, $timenow, $timenow + DAYSECS],
            // Sun Dec 19 2021 15:00:00 GMT+0000.
            'Daily recurrence' => [model::RECURRENCE_DAILY, $timescheduled, $timenow, 1639926000],
            // Mon Dec 20 2021 15:00:00 GMT+0000.
            'Weekday recurrence' => [model::RECURRENCE_WEEKDAYS, $timescheduled, $timenow, 1640012400],
            // Tue Dec 21 2021 15:00:00 GMT+0000.
            'Weekly recurrence' => [model::RECURRENCE_WEEKLY, $timescheduled, $timenow, 1640098800],
            // Sun Jan 02 2022 15:00:00 GMT+0000.
            'Monthy recurrence' => [model::RECURRENCE_MONTHLY, $timescheduled, $timenow, 1641135600],
            // Wed Nov 02 2022 15:00:00 GMT+0000.
            'Annual recurrence' => [model::RECURRENCE_ANNUALLY, $timescheduled, $timenow, 1667401200],
         ];
    }

    /**
     * Test for calculating next schedule send time
     *
     * @param int $recurrence
     * @param int $timescheduled
     * @param int $timenow
     * @param int $expected
     *
     * @dataProvider calculate_next_send_time_provider
     */
    public function test_calculate_next_send_time(int $recurrence, int $timescheduled, int $timenow, int $expected): void {
        $this->resetAfterTest();

        /** @var core_reportbuilder_generator $generator */
        $generator = $this->getDataGenerator()->get_plugin_generator('core_reportbuilder');
        $report = $generator->create_report(['name' => 'My report', 'source' => users::class]);

        $schedule = $generator->create_schedule([
            'reportid' => $report->get('id'),
            'name' => 'My schedule',
            'recurrence' => $recurrence,
            'timescheduled' => $timescheduled,
            'timenow' => $timenow,
        ]);

        $this->assertEquals($expected, schedule::calculate_next_send_time($schedule, $timenow));
    }
}