import Foundation

// Example shared models for Watch-optimized data

struct Workout: Codable {
    let date: Date
    // Add other properties as needed
}

struct Preferences: Codable {
    let isPremium: Bool
    let appearance: Appearance
}

enum Appearance: Codable {
    case light, dark
}

// Shared model (iOS + watchOS)
struct FullUserProfile: Codable {
    let id: UUID
    let fullName: String
    let email: String
    let avatarURL: URL?
    let allWorkouts: [Workout]      // ← potentially huge
    let preferences: Preferences
    
    // Lightweight Watch version — computed
    var watchVersion: WatchUserProfile {
        WatchUserProfile(
            id: id,
            displayName: String(fullName.split(separator: " ").first ?? Substring(fullName)),
            hasAvatar: avatarURL != nil,
            recentWorkoutCount: allWorkouts.count,
            lastWorkoutDate: allWorkouts.last?.date,
            showPremiumBadge: preferences.isPremium,
            darkModeEnabled: preferences.appearance == .dark
        )
    }
}

struct WatchUserProfile: Codable, Sendable {
    let id: UUID
    let displayName: String
    let hasAvatar: Bool
    let recentWorkoutCount: Int
    let lastWorkoutDate: Date?
    let showPremiumBadge: Bool
    let darkModeEnabled: Bool
}

// Example usage on phone (commented out)
// let profile = FullUserProfile(...) // full heavy object
// let watchData = try JSONEncoder().encode(profile.watchVersion)
// WCSession.default.updateApplicationContext(["profile": watchData])

// Alternative: WatchRepresentable protocol
public protocol WatchRepresentable {
    associatedtype WatchVersion: Codable, Sendable
    var watchVersion: WatchVersion { get }
}