<?php

declare(strict_types=1);

namespace App\Tests\Service;

use App\Entity\AccessCode;
use App\Entity\Booking;
use App\Entity\BookingSeries;
use App\Entity\Resource;
use App\Entity\ResourceGroup;
use App\Entity\User;
use App\Enum\CodeVisibility;
use App\Enum\RecurrenceRule;
use App\Enum\ResourceType;
use App\Model\SeriesResult;
use App\Model\TimeRange;
use App\Service\AuditLogger;
use Monolog\Handler\TestHandler;
use Monolog\LogRecord;
use Monolog\Logger;
use PHPUnit\Framework\TestCase;

/**
 * What the trail has to say, rather than that it says something: an audit record is only useful
 * if it names the holder and the resource, since the actor beside it is what makes an
 * administrator acting for somebody else visible at all.
 */
class AuditLoggerTest extends TestCase
{
    private TestHandler $handler;
    private AuditLogger $audit;

    protected function setUp(): void
    {
        $this->handler = new TestHandler();
        $this->audit = new AuditLogger(new Logger('audit', [$this->handler]));
    }

    public function testACreatedBookingIsRecordedWithItsHolderAndResource(): void
    {
        $this->audit->bookingCreated($this->booking());

        $record = $this->record();

        self::assertSame('Booking created.', $record->message);
        self::assertSame('holder@ep-reisen.de', $record->context['holder']);
        self::assertSame('D1', $record->context['resource']);
        self::assertSame('2026-09-18', $record->context['date']);
        self::assertSame('09:00-13:00', $record->context['time']);
    }

    public function testARescheduledBookingKeepsTheSpanItCameFrom(): void
    {
        $booking = $this->booking();
        $previous = $booking->getTimeRange();
        $booking->changeTime(TimeRange::fromMinutes(600, 900));

        $this->audit->bookingRescheduled($booking, $previous);

        $record = $this->record();

        self::assertSame('Booking rescheduled.', $record->message);
        self::assertSame('09:00-13:00', $record->context['previous_time']);
        self::assertSame('10:00-15:00', $record->context['time']);
    }

    /**
     * A series is one record, not one per occurrence -- otherwise a year of weekly bookings
     * buries every other event in the file.
     */
    public function testASeriesIsRecordedOnceWithTheDaysItCouldNotHave(): void
    {
        $series = new BookingSeries(
            $this->user(),
            $this->resource(),
            RecurrenceRule::WEEKLY,
            new \DateTimeImmutable('2026-09-18'),
            new \DateTimeImmutable('2026-10-02'),
            TimeRange::fromMinutes(540, 780),
        );

        $this->audit->seriesCreated(new SeriesResult($series, [$this->booking()], ['2026-09-25' => 'taken']));

        $records = $this->handler->getRecords();

        self::assertCount(1, $records);
        self::assertSame('Booking series created.', $records[0]->message);
        self::assertSame(1, $records[0]->context['bookings_created']);
        self::assertSame(['2026-09-25'], $records[0]->context['skipped_dates']);
    }

    /**
     * Ending a series can delete it, and Doctrine nulls the id of a deleted entity -- so the id
     * is passed in, and the record must use the one it was given.
     */
    public function testAnEndedSeriesIsRecordedWithTheIdItHadBeforeItWasDeleted(): void
    {
        $series = new BookingSeries(
            $this->user(),
            $this->resource(),
            RecurrenceRule::WEEKLY,
            new \DateTimeImmutable('2026-09-18'),
            new \DateTimeImmutable('2026-10-02'),
            TimeRange::fromMinutes(540, 780),
        );

        $this->audit->seriesEnded($series, 42, new \DateTimeImmutable('2026-09-25'), 2);

        $record = $this->record();

        self::assertSame(42, $record->context['series_id']);
        self::assertSame('2026-09-25', $record->context['ended_from']);
        self::assertSame(2, $record->context['bookings_removed']);
    }

    public function testRetiringAResourceIsRecordedAsTheTransitionItIs(): void
    {
        $resource = $this->resource();
        $resource->setGroup(new ResourceGroup(ResourceType::DESK, 'Room 1'));
        $resource->setActive(false);

        $this->audit->resourceUpdated($resource, true);

        $record = $this->record();

        self::assertSame('Resource updated.', $record->message);
        self::assertTrue($record->context['was_active']);
        self::assertFalse($record->context['active']);
        self::assertSame('Room 1', $record->context['group']);
    }

    public function testADeletedResourceIsRecordedWithHowManyBookingsWentWithIt(): void
    {
        $this->audit->resourceDeleted(7, 'D1', ResourceType::DESK, 3);

        $record = $this->record();

        self::assertSame('Resource deleted.', $record->message);
        self::assertSame(7, $record->context['resource_id']);
        self::assertSame(3, $record->context['bookings_deleted']);
    }

    public function testASignInAndASignOutAreBothRecordedAgainstTheAccount(): void
    {
        $this->audit->signedIn($this->user());
        $this->audit->signedOut($this->user());

        $records = $this->handler->getRecords();

        self::assertSame('User signed in.', $records[0]->message);
        self::assertSame('holder@ep-reisen.de', $records[0]->context['account']);
        self::assertSame('User signed out.', $records[1]->message);
        self::assertSame('holder@ep-reisen.de', $records[1]->context['account']);
    }

    /**
     * The one thing the trail must never carry. It is asserted rather than left to review,
     * because a helpful "log what changed" added later would leak every door code in the
     * building into a file that outlives the codes themselves.
     */
    public function testAnAccessCodeIsRecordedWithoutItsValue(): void
    {
        $code = new AccessCode('Aufzug', '4711', new \DateTimeImmutable('2026-10-01'));

        $this->audit->accessCodeCreated($code);
        $this->audit->accessCodeUpdated($code, true, CodeVisibility::ADMIN);
        $this->audit->accessCodeDeleted(7, 'Aufzug', CodeVisibility::EVERYONE);

        foreach ($this->handler->getRecords() as $record) {
            self::assertStringNotContainsString('4711', json_encode($record->context, \JSON_THROW_ON_ERROR));
        }

        $records = $this->handler->getRecords();
        self::assertSame('Aufzug', $records[0]->context['access_code']);
        self::assertSame('2026-10-01', $records[0]->context['valid_from']);
        self::assertSame('everyone', $records[0]->context['visibility']);
        self::assertTrue($records[1]->context['code_changed']);
        self::assertSame('admin', $records[1]->context['previous_visibility']);
        self::assertSame(7, $records[2]->context['access_code_id']);
    }

    private function record(): LogRecord
    {
        return $this->handler->getRecords()[0];
    }

    private function booking(): Booking
    {
        return new Booking(
            $this->user(),
            $this->resource(),
            new \DateTimeImmutable('2026-09-18'),
            TimeRange::fromMinutes(540, 780),
        );
    }

    private function user(): User
    {
        return new User('holder@ep-reisen.de', 'Holder');
    }

    private function resource(): Resource
    {
        return new Resource(ResourceType::DESK, 'D1');
    }
}