import SwiftUI

struct SlideInModal<Content: View>: View {
    @Binding var isPresented: Bool
    let onDismiss: () -> Void
    let content: () -> Content
    
    // 动画配置 - 更慢的动画
    private let animation = Animation.spring(
        response: 0.8,  // 增加响应时间使动画更慢
        dampingFraction: 1,  // 减少阻尼系数使弹跳更明显
        blendDuration: 0.8 // 增加混合时间使过渡更平滑
    )
    
    var body: some View {
        ZStack(alignment: .leading) {
            // 遮罩背景
            if isPresented {
                Color.clear
                    .contentShape(Rectangle())
                    .edgesIgnoringSafeArea(.all)
                    .transition(.opacity)
                    .zIndex(1)
                    .onTapGesture {
                        withAnimation(animation) {
                            isPresented = false
                            onDismiss()
                        }
                    }
                
                // 添加一个额外的容器来承载阴影
                ZStack(alignment: .leading) {
                    // 弹窗内容
                    VStack(spacing: 0) {
                        // 顶部安全区域占位
                        Color.clear
                            .frame(height: UIApplication.shared.windows.first?.safeAreaInsets.top ?? 0)
                        
                        // 内容区域
                        content()
                            .frame(maxWidth: .infinity, maxHeight: .infinity)
                            .padding(.bottom, UIApplication.shared.windows.first?.safeAreaInsets.bottom ?? 0)
                    }
                    .frame(width: UIScreen.main.bounds.width * 0.8)
                    .frame(maxHeight: .infinity)
                    .background(Color(.systemBackground))
                    .edgesIgnoringSafeArea(.vertical)
                }
                // 在这里应用阴影
                .background(
                    RoundedRectangle(cornerRadius: 0)
                        .fill(Color(.systemBackground))
                        .shadow(
                            color: .black.opacity(0.3),
                            radius: 10,
                            x: 5,
                            y: 0
                        )
                )
                .offset(x: isPresented ? 0 : -UIScreen.main.bounds.width)
                .zIndex(2)
                .transition(.move(edge: .leading))
                .animation(animation, value: isPresented)
            }
        }
        .frame(maxWidth: .infinity, maxHeight: .infinity, alignment: .leading)
        .edgesIgnoringSafeArea(.all)
    }
}