<?php

namespace RoosterLMS\Commerce;

defined( 'ABSPATH' ) || exit;

final class Offer {

	public function __construct(
		public readonly int $id,
		public readonly int $product_id,
		public readonly int $variation_id,
		public readonly OfferTarget $target_type,
		public readonly int $target_id,
		public readonly array $scope_ids,
		public readonly OfferWindow $window,
		public readonly int $grace_min,
		public readonly ?int $access_days,
		public readonly int $seats_per_qty,
		public readonly OfferState $state,
		public readonly string $created_at,
		public readonly string $updated_at
	) {}

	public static function from_row( array $r ): self {
		$scope = json_decode( (string) ( $r['scope_ids'] ?? '' ), true );
		return new self(
			(int) $r['id'],
			(int) $r['product_id'],
			(int) $r['variation_id'],
			OfferTarget::tryFrom( (int) $r['target_type'] ) ?? OfferTarget::COURSE,
			(int) $r['target_id'],
			is_array( $scope ) ? array_values( array_map( 'intval', $scope ) ) : array(),
			OfferWindow::tryFrom( (int) $r['sale_window'] ) ?? OfferWindow::ALWAYS,
			(int) $r['grace_min'],
			null === $r['access_days'] ? null : (int) $r['access_days'],
			max( 1, (int) $r['seats_per_qty'] ),
			OfferState::tryFrom( (int) $r['state'] ) ?? OfferState::PAUSED,
			(string) $r['created_at'],
			(string) $r['updated_at']
		);
	}

	public function is_course_based(): bool {
		return in_array( $this->target_type, array( OfferTarget::COURSE, OfferTarget::SECTIONS, OfferTarget::LESSON ), true );
	}

	public function access_until( string $paid_at ): ?string {
		if ( null === $this->access_days || $this->access_days <= 0 ) {
			return null;
		}
		return gmdate( 'Y-m-d H:i:s', (int) strtotime( $paid_at . ' UTC' ) + $this->access_days * DAY_IN_SECONDS );
	}
}