using System.Net;
using System.Net.Http;
using System.Net.Sockets;
using QuickIP.Client.Models;

namespace QuickIP.Client.Services;

public sealed class AgentApiService
{
    public async Task<HealthCheckResult> CheckHealthAsync(string baseAddress, string password, string localIPv4, CancellationToken cancellationToken = default)
    {
        try
        {
            using var handler = new SocketsHttpHandler();
            if (!string.IsNullOrWhiteSpace(localIPv4))
            {
                handler.ConnectCallback = async (context, token) =>
                {
                    var socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
                    socket.Bind(new IPEndPoint(IPAddress.Parse(localIPv4), 0));
                    await socket.ConnectAsync(context.DnsEndPoint, token);
                    return new NetworkStream(socket, ownsSocket: true);
                };
            }

            using var client = new HttpClient(handler) { BaseAddress = new Uri(baseAddress), Timeout = TimeSpan.FromSeconds(5) };
            client.DefaultRequestHeaders.Add("X-Admin-Password", password);

            using var response = await client.GetAsync("/api/health", cancellationToken);
            return new HealthCheckResult
            {
                Success = response.IsSuccessStatusCode,
                StatusCode = (int)response.StatusCode,
                Message = response.IsSuccessStatusCode
                    ? "HTTP 健康检查通过。"
                    : $"HTTP 健康检查返回状态码 {(int)response.StatusCode}。",
            };
        }
        catch (Exception ex)
        {
            return new HealthCheckResult
            {
                Success = false,
                StatusCode = null,
                Message = ex.Message,
            };
        }
    }
}