import Foundation
import SwiftData

/// Offline-Grade in der lokalen Queue. Wird beim Reconnect der Reihe nach
/// an `POST /reviews/:cardId/:subIndex/grade` gesendet — mit dem
/// **originalen** `reviewedAt`-Timestamp, damit der Server-FSRS
/// korrekt rechnet.
@Model
final class PendingGrade {
    @Attribute(.unique) var id: String
    var cardId: String
    var subIndex: Int
    var ratingRaw: String
    var reviewedAt: Date
    var queuedAt: Date
    var lastTryAt: Date?
    var lastError: String?

    init(cardId: String, subIndex: Int, rating: Rating, reviewedAt: Date) {
        id = "\(cardId)-\(subIndex)-\(reviewedAt.timeIntervalSince1970)"
        self.cardId = cardId
        self.subIndex = subIndex
        ratingRaw = rating.rawValue
        self.reviewedAt = reviewedAt
        queuedAt = .now
    }

    var rating: Rating? {
        Rating(rawValue: ratingRaw)
    }
}