import Foundation
import SwiftData

// CloudKit-compatible (2.0): no unique constraints, inline defaults everywhere.
@Model
final class Dish {
    var id: UUID = UUID()
    var name: String = ""
    var descriptionText: String?
    var tagIds: [UUID] = []
    var createdAt: Date = Date()
    var isPriority: Bool = false

    /// Optional ingredient lines (one per entry, e.g. "200g spaghetti").
    /// Populated lazily — manually or via on-device generation — and only for
    /// the dishes a user actually shops for. Never required to create a dish.
    var ingredients: [String] = []

    /// Optional dish photo. Stored outside the main store to keep it light and
    /// CloudKit-friendly.
    @Attribute(.externalStorage) var photoData: Data?

    /// Fixed-slot rule ("tortilla every Friday dinner"): when both are set,
    /// autocomplete pins this dish to that weekday+meal before filling the
    /// rest of the week. 0=Monday … 6=Sunday, matching `MealSlot.dayOfWeek`.
    var fixedDayOfWeek: Int?
    var fixedMealType: String?

    init(
        id: UUID = UUID(),
        name: String,
        descriptionText: String? = nil,
        tagIds: [UUID] = [],
        createdAt: Date = Date(),
        isPriority: Bool = false,
        ingredients: [String] = [],
        photoData: Data? = nil,
        fixedDayOfWeek: Int? = nil,
        fixedMealType: String? = nil
    ) {
        self.id = id
        self.name = name
        self.descriptionText = descriptionText
        self.tagIds = tagIds
        self.createdAt = createdAt
        self.isPriority = isPriority
        self.ingredients = ingredients
        self.photoData = photoData
        self.fixedDayOfWeek = fixedDayOfWeek
        self.fixedMealType = fixedMealType
    }
}

extension Dish {
    static func stableSortedForDisplay(_ dishes: [Dish]) -> [Dish] {
        dishes.sorted { lhs, rhs in
            if lhs.createdAt != rhs.createdAt {
                return lhs.createdAt > rhs.createdAt
            }
            return lhs.id.uuidString < rhs.id.uuidString
        }
    }
}