import SwiftUI

struct LoginView: View {
    @EnvironmentObject var authManager: AuthManager
    @State private var email = ""
    @State private var password = ""
    @State private var isLoading = false
    @State private var errorMessage = ""

    var body: some View {
        ZStack {
            LinearGradient(colors: [Color(hex: "1a1a2e"), Color(hex: "16213e")], startPoint: .top, endPoint: .bottom)
                .ignoresSafeArea()
            VStack(spacing: 32) {
                VStack(spacing: 8) {
                    Text("🫀").font(.system(size: 60))
                    Text("Pulse Health").font(.largeTitle.bold()).foregroundColor(.white)
                    Text("Персональный дашборд здоровья").font(.subheadline).foregroundColor(.white.opacity(0.6))
                }.padding(.top, 60)
                VStack(spacing: 16) {
                    TextField("Email", text: $email)
                        .keyboardType(.emailAddress).autocapitalization(.none)
                        .padding().background(Color.white.opacity(0.1)).cornerRadius(12).foregroundColor(.white)
                    SecureField("Пароль", text: $password)
                        .padding().background(Color.white.opacity(0.1)).cornerRadius(12).foregroundColor(.white)
                    if !errorMessage.isEmpty {
                        Text(errorMessage).foregroundColor(.red).font(.caption)
                    }
                    Button(action: login) {
                        if isLoading { ProgressView().tint(.white) }
                        else { Text("Войти").font(.headline).foregroundColor(.black) }
                    }
                    .frame(maxWidth: .infinity).padding()
                    .background(Color(hex: "00d4aa")).cornerRadius(12).disabled(isLoading)
                }.padding(.horizontal, 24)
                Spacer()
            }
        }
    }

    func login() {
        isLoading = true; errorMessage = ""
        Task {
            do {
                let response = try await APIService.shared.login(email: email, password: password)
                let profile = try await APIService.shared.getProfile(token: response.token)
                await MainActor.run {
                    authManager.login(token: response.token, name: response.user.name, apiKey: profile.apiKey ?? "")
                }
            } catch {
                await MainActor.run { errorMessage = error.localizedDescription; isLoading = false }
            }
        }
    }
}