<?php

use PHPUnit\Framework\TestCase;

/**
 * Tests for modules-available/exams/page.inc.php using SQLite DB and stubs.
 *
 */
class ExamsPageTest extends TestCase
{
	protected function setUp(): void
	{
		Database::resetSchema();
		Render::reset();
		Message::reset();
		User::reset();
		$_GET = $_POST = $_REQUEST = [];
		// Use real Location
		$GLOBALS['__TEST_USE_REAL_CLASSES'] = ['Location'];
		require_once __DIR__ . '/../../../modules-available/locations/inc/location.inc.php';
		require_once __DIR__ . '/../../../modules-available/exams/inc/exams.inc.php';
		require_once __DIR__ . '/../../../modules-available/exams/page.inc.php';
		// Logged in
		User::$loggedIn = true;
		User::$id = 1;
	}

	private function seedBasicExamAndLecture(int $locationId, string $examDesc = 'Exam 1'): void
	{
		$now = time();
		Database::exec('INSERT INTO exams (examid, lectureid, autologin, starttime, endtime, description) VALUES (100, :l, :a, :s, :e, :d)', [
			'l' => 'LEC-1', 'a' => '', 's' => $now - 3600, 'e' => $now + 3600, 'd' => $examDesc
		]);
		Database::exec('INSERT INTO exams_x_location (examid, locationid) VALUES (100, :lid)', ['lid' => $locationId]);
		Database::exec('INSERT INTO sat_user (userid, firstname, lastname, email) VALUES (1, "T", "U", "t@u")');
		Database::exec('INSERT INTO sat_lecture (lectureid, ownerid, displayname, starttime, endtime, isexam, isenabled) VALUES (:id, 1, :n, :ls, :le, 1, 1)', [
			'id' => 'LEC-1', 'n' => 'Lecture 1', 'ls' => $now - 7200, 'le' => $now + 7200
		]);
		Database::exec('INSERT INTO sat_lecture_x_location (lectureid, locationid) VALUES (:id, :lid)', ['id' => 'LEC-1', 'lid' => $locationId]);
	}

	public function testShowRendersListsAndVisWithPermissions(): void
	{
		// Permissions: view on all, edit only for location 2
		User::$permissions = ['exams.view' => true, 'exams.edit' => true];
		User::$allowedLocations = [2];
		$this->seedBasicExamAndLecture(2, 'My Exam');

		$_GET = ['action' => 'show'];
		$_REQUEST = $_GET;
		$page = new Page_Exams('exams');
		$page->preprocess();
		$page->render();

		$names = array_column(Render::$templates, 'name');
		$this->assertContains('page-main-heading', $names);
		$this->assertContains('page-exams', $names);
		$this->assertContains('page-exams-vis', $names);

		// Find page-exams-vis payload and verify JSON fields decode
		$vis = null; foreach (Render::$templates as $t) { if ($t['name'] === 'page-exams-vis') { $vis = $t; break; } }
		$this->assertNotNull($vis);
		$data = $vis['data'];
		$items = json_decode($data['exams_json'], true);
		$groups = json_decode($data['rooms_json'], true);
		$this->assertIsArray($items);
		$this->assertIsArray($groups);
		$this->assertNotEmpty($items);
		$this->assertNotEmpty($groups);
		$groupIds = array_column($groups, 'id');
		$this->assertContains(2, $groupIds);
	}

	public function testShowFiltersByViewLocationsAndDisablesEditWhenCannotEditAll(): void
	{
		// User can view location 2 but cannot edit location 3
		User::$permissions = ['exams.view' => true, 'exams.edit' => false];
		User::$allowedLocations = [2];
		$this->seedBasicExamAndLecture(3, 'Other Exam');

		$_GET = ['action' => 'show'];
		$_REQUEST = $_GET;
		$page = new Page_Exams('exams');
		$page->preprocess();
		$page->render();

		// page-exams rows payload should mark edit disabled when user lacks edit perms for locations
		$tpl = null;
		foreach (Render::$templates as $t) {
			if ($t['name'] === 'page-exams') {
				$tpl = $t;
				break;
			}
		}
		$this->assertNotNull($tpl);
		$rows = $tpl['data']['exams'] ?? [];
		if (!empty($rows)) {
			$this->assertArrayHasKey('edit', $rows[0]);
			$this->assertSame('disabled', $rows[0]['edit']['disabled'] ?? '');
		}
	}
}