import Foundation

/// Card-DTO. Wire-Format aus `wordeck/apps/api/src/lib/dto.ts:toCardDto`
/// und `wordeck/packages/wordeck-domain/src/schemas/card.ts`.
///
/// Seit Wordeck-Rebrand (2026-05-17) text-only — kein `media_refs`
/// mehr im Schema.
struct Card: Codable, Identifiable, Hashable {
    let id: String
    let deckId: String
    let userId: String
    let type: CardType
    let fields: [String: String]
    let contentHash: String?
    let createdAt: Date
    let updatedAt: Date

    enum CodingKeys: String, CodingKey {
        case id
        case deckId = "deck_id"
        case userId = "user_id"
        case type
        case fields
        case contentHash = "content_hash"
        case createdAt = "created_at"
        case updatedAt = "updated_at"
    }
}

/// Card-Type-Enum. Wordeck ist text-only (Rebrand 2026-05-17) —
/// `image-occlusion` und `audio-front` sind aus dem Schema raus.
enum CardType: String, Codable, CaseIterable {
    case basic
    case basicReverse = "basic-reverse"
    case cloze
    case typing
    case multipleChoice = "multiple-choice"
}

/// Vereinfachtes Card-Sub-Objekt aus `/reviews/due?deck_id=X`-Response.
/// Server liefert nur 4 Felder (id, deckId, type, fields) als Drizzle-
/// Joined-Subset — Achtung: `deckId` hier in **camelCase**, nicht
/// snake_case wie sonst.
struct ReviewCard: Codable, Hashable {
    let id: String
    let deckId: String
    let type: CardType
    let fields: [String: String]
}