import SwiftUI

/// 登录守卫占位:未登录时显示,点按弹出登录页。登录成功后 session 变化,父视图自动切走。
struct LoginRequiredView: View {
    var message: String = "登录后查看"
    @Environment(SessionStore.self) private var session
    @State private var showLogin = false

    var body: some View {
        VStack(spacing: 20) {
            Image(systemName: "person.crop.circle.badge.questionmark")
                .font(.system(size: 60))
                .foregroundStyle(AppColors.gray400)

            Text(message)
                .foregroundStyle(.secondary)
                .multilineTextAlignment(.center)
                .padding(.horizontal, 40)

            Button {
                showLogin = true
            } label: {
                Text("登录 / 注册")
                    .font(.headline)
                    .frame(maxWidth: .infinity)
                    .padding(.vertical, 14)
                    .background(AppColors.primary)
                    .foregroundStyle(.black)
                    .clipShape(RoundedRectangle(cornerRadius: 12))
            }
            .padding(.horizontal, 40)
        }
        .frame(maxWidth: .infinity, maxHeight: .infinity)
        .sheet(isPresented: $showLogin) {
            LoginView().environment(session)
        }
    }
}