//
//  SettingsNetworkView 2.swift
//  punchnet
//
//  Created by 安礼成 on 2026/3/19.
//
import SwiftUI

struct SettingsNetworkView: View {
    @Environment(UserContext.self) var userContext: UserContext
    @State private var selectedExitNode: UserContext.NetworkSession.ExitNode?
    
    var body: some View {
        ScrollView(.vertical, showsIndicators: false) {
            VStack(alignment: .leading, spacing: 24) {
                
                // MARK: - 网络连接配置
                networkSectionHeader(title: "连接设置", icon: "wifi.router.fill")
                
                if let networkSession = userContext.networkSession {
                    VStack(spacing: 0) {
//                        // 默认网络项
//                        NetworkRow(title: "默认网络", value: state.selectedNetwork.name) {
//                            Menu {
//                                ForEach(state.networks, id: \.id) { network in
//                                    Button(network.name) {
//                                        self.state.selectedNetwork = network
//                                    }
//                                }
//                            } label: {
//                                actionLabel(text: "切换")
//                            }
//                            .buttonStyle(.plain)
//                        }
//                        
//                        Divider().padding(.leading, 16)
                        
                        // 出口节点项
                        NetworkRow(title: "出口节点", value: selectedExitNode?.nodeName ?? "") {
                            Menu {
                                ForEach(networkSession.exitNodes, id: \.uuid) { node in
                                    Button {
                                        self.selectedExitNode = node
                                    } label: {
                                        Text(node.nodeName)
                                    }
                                }
                            } label: {
                                actionLabel(text: "更改")
                            }
                            .buttonStyle(.plain)
                        }
                        
                    }
                    .background(Color.primary.opacity(0.03))
                    .cornerRadius(12)
                    .overlay(RoundedRectangle(cornerRadius: 12).stroke(Color.primary.opacity(0.05), lineWidth: 1))
                }
                
                // MARK: - 授权与安全
                networkSectionHeader(title: "授权状态", icon: "checkmark.shield.fill")
                
                VStack(spacing: 0) {
                    StatusRow(title: "当前状态", value: "有效", valueColor: .green)
                    
                    Divider()
                        .padding(.leading, 16)
                    
                    StatusRow(title: "有效期", value: "临时 (至断开连接)", valueColor: .secondary)
                }
                .background(Color.primary.opacity(0.03))
                .cornerRadius(12)
                
                // MARK: - 外部操作
                HStack(spacing: 16) {
                    Button {
                        
                    } label: {
                        Label("进入管理平台", systemImage: "arrow.up.right.app")
                            .font(.subheadline.bold())
                    }
                    .buttonStyle(.borderedProminent)
                    .controlSize(.large)
                    
                    Button {
                        
                    } label: {
                        Text("查看诊断详情")
                    }
                    .buttonStyle(.bordered)
                    .controlSize(.large)
                }
                .padding(.top, 8)
            }
            .padding(32)
            .frame(maxWidth: 600, alignment: .leading)
        }
    }
    
    // MARK: - 辅助组件
    
    private func networkSectionHeader(title: String, icon: String) -> some View {
        HStack {
            Image(systemName: icon)
                .foregroundColor(.blue)
                .font(.system(size: 14, weight: .semibold))
            
            Text(title)
                .font(.system(size: 15, weight: .bold))
                .foregroundColor(.secondary)
        }
        .padding(.leading, 4)
    }
    
    private func actionLabel(text: String) -> some View {
        Text(text)
            .font(.subheadline)
            .padding(.horizontal, 10)
            .padding(.vertical, 4)
            .background(Capsule().fill(Color.blue.opacity(0.1)))
            .foregroundColor(.blue)
    }
}

// MARK: - 通用行组件
struct NetworkRow<Content: View>: View {
    let title: String
    let value: String
    let action: () -> Content
    
    init(title: String, value: String, @ViewBuilder action: @escaping () -> Content) {
        self.title = title
        self.value = value
        self.action = action
    }
    
    var body: some View {
        HStack {
            VStack(alignment: .leading, spacing: 4) {
                Text(title).font(.caption).foregroundColor(.secondary)
                Text(value).font(.system(size: 15, weight: .medium))
            }
            Spacer()
            action()
        }
        .padding(16)
    }
}

struct StatusRow: View {
    let title: String
    let value: String
    let valueColor: Color
    
    var body: some View {
        HStack {
            Text(title)
                .font(.system(size: 14))
                .foregroundColor(.primary.opacity(0.8))
            
            Spacer()
            Text(value)
                .font(.system(size: 14, weight: .medium))
                .foregroundColor(valueColor)
        }
        .padding(16)
    }
}

// MARK: - 预览辅助
#Preview {
    SettingsNetworkView()
        .environment(UserContext()) // 确保环境中存在 UserContext
}