import SwiftUI

// MARK: - Tab 枚举
enum Tab: Int, CaseIterable {
    case feed = 0
    case me = 1
    
    var title: String {
        switch self {
        case .feed:
            return "动态"
        case .me:
            return "我的"
        }
    }
    
    var iconName: String {
        switch self {
        case .feed:
            return "sparkles"
        case .me:
            return "person"
        }
    }
    
    var selectedIconName: String {
        switch self {
        case .feed:
            return "sparkles"
        case .me:
            return "person.fill"
        }
    }
}

// MARK: - BottomTabView 组件
struct BottomTabView: View {
    @Binding var selectedTab: Tab
    
    var body: some View {
        HStack(spacing: 0) {
            ForEach(Tab.allCases, id: \.rawValue) { tab in
                Button(action: {
                    selectedTab = tab
                }) {
                    VStack(spacing: 4) {
                        Image(systemName: selectedTab == tab ? tab.selectedIconName : tab.iconName)
                            .font(.system(size: 20))
                            .foregroundColor(selectedTab == tab ? .purple : .gray)
                        
                        Text(tab.title)
                            .font(.caption2)
                            .foregroundColor(selectedTab == tab ? .purple : .gray)
                    }
                    .frame(maxWidth: .infinity)
                }
                .buttonStyle(PlainButtonStyle())
            }
        }
        .padding(.vertical, 12)
        .padding(.horizontal, 8)
        .background(
            .ultraThinMaterial,
            in: Rectangle()
        )
        .overlay(
            Rectangle()
                .frame(height: 0.5)
                .foregroundColor(.black.opacity(0.2)),
            alignment: .top
        )
    }
}