import SwiftUI

extension Color {
    init(hex: String) {
        let hex = hex.trimmingCharacters(in: CharacterSet.alphanumerics.inverted)
        var int: UInt64 = 0
        Scanner(string: hex).scanHexInt64(&int)
        let a, r, g, b: UInt64
        switch hex.count {
        case 3: (a, r, g, b) = (255, (int >> 8) * 17, (int >> 4 & 0xF) * 17, (int & 0xF) * 17)
        case 6: (a, r, g, b) = (255, int >> 16, int >> 8 & 0xFF, int & 0xFF)
        case 8: (a, r, g, b) = (int >> 24, int >> 16 & 0xFF, int >> 8 & 0xFF, int & 0xFF)
        default: (a, r, g, b) = (255, 0, 0, 0)
        }
        self.init(.sRGB, red: Double(r)/255, green: Double(g)/255, blue: Double(b)/255, opacity: Double(a)/255)
    }
}

@main
struct PulseApp: App {
    @StateObject private var authManager = AuthManager()

    var body: some Scene {
        WindowGroup {
            if authManager.isLoggedIn {
                MainTabView()
                    .environmentObject(authManager)
            } else {
                LoginView()
                    .environmentObject(authManager)
            }
        }
    }
}

class AuthManager: ObservableObject {
    @Published var isLoggedIn: Bool = false
    @Published var token: String = ""
    @Published var userName: String = ""
    @Published var userId: Int = 0
    @Published var healthApiKey: String = "health-cosmo-2026"

    init() {
        token = UserDefaults.standard.string(forKey: "pulseToken") ?? ""
        userName = UserDefaults.standard.string(forKey: "userName") ?? ""
        userId = UserDefaults.standard.integer(forKey: "userId")
        healthApiKey = UserDefaults.standard.string(forKey: "healthApiKey") ?? "health-cosmo-2026"
        isLoggedIn = !token.isEmpty
    }

    func login(token: String, user: UserInfo) {
        self.token = token
        self.userName = user.displayName
        self.userId = user.id
        UserDefaults.standard.set(token, forKey: "pulseToken")
        UserDefaults.standard.set(user.displayName, forKey: "userName")
        UserDefaults.standard.set(user.id, forKey: "userId")
        isLoggedIn = true
    }

    func logout() {
        token = ""; userName = ""; userId = 0
        UserDefaults.standard.removeObject(forKey: "pulseToken")
        UserDefaults.standard.removeObject(forKey: "userName")
        UserDefaults.standard.removeObject(forKey: "userId")
        isLoggedIn = false
    }
}