<?php

namespace RoosterLMS\Commerce;

use RoosterLMS\Domain\Actor;
use RoosterLMS\Domain\Authorize;
use RoosterLMS\Domain\DomainError;
use RoosterLMS\Domain\ErrorCode;
use RoosterLMS\Domain\Services;
use RoosterLMS\Enrolment\GrantSource;

defined( 'ABSPATH' ) || exit;

final class CourseOfferHandler implements OfferHandler {

	public function target(): OfferTarget {
		return OfferTarget::COURSE;
	}

	public function validate( int $target_id, array $scope_ids ): void {
		if ( null === Services::course_repo()->get( $target_id ) ) {
			DomainError::raise( ErrorCode::INVALID, array( 'reason' => 'target' ) );
		}
		if ( array() !== $scope_ids ) {
			DomainError::raise( ErrorCode::INVALID, array( 'reason' => 'scope' ) );
		}
	}

	public function authorize( int $target_id, Actor $actor ): void {
		$course = Services::course_repo()->get( $target_id );
		if ( null === $course ) {
			DomainError::raise( ErrorCode::NOT_FOUND );
		}
		Authorize::edit_post( $actor, $course->home_post_id );
	}

	public function on_sale( Offer $offer, \DateTimeImmutable $now ): bool {
		$course = Services::course_repo()->get( $offer->target_id );
		return null !== $course && $course->is_active() && \RoosterLMS\CourseInfo\ComingSoon::enrolment_open( $course, $now->setTimezone( new \DateTimeZone( 'UTC' ) )->format( 'Y-m-d H:i:s' ) );
	}

	public function grant( Offer $offer, SaleLine $line, Actor $actor ): SaleGrant {
		$flags  = Services::capacity()->has_place_locked( $offer->target_id, $line->user_id ) ? 0 : Sale::FLAG_OVERSOLD;
		$result = Services::grants()->grant( 0, $line->user_id, $offer->target_id, GrantSource::PURCHASE, $actor );
		Services::grant_scope()->clear( $result->grant_id, $actor );
		$until = $offer->access_until( '' !== $line->paid_at ? $line->paid_at : \RoosterLMS\Data\Transaction::now() );
		Services::grants()->apply_expiry( $result, $until );
		return new SaleGrant( array( $result->grant_id ), 0, $until, $flags );
	}

	public function end( Offer $offer, Sale $sale, Actor $actor ): void {
		Services::sales()->reconcile_course_access( $sale->user_id, $offer->target_id, $actor );
	}
}