using System;
using System.Configuration;
using System.Diagnostics;
using System.IO;
using System.Net.Http;
using System.Threading;

namespace ivf_tl_Operate.Helpers
{
    /// <summary>
    /// operate 侧:确保 control 独立进程在运行。
    /// 探 /ping → 不在则 Process.Start 拉起 control.exe(命令行传账号)→ 轮询就绪。
    /// operate 是管理员、control 也是 requireAdministrator,拉起不再弹 UAC。
    /// </summary>
    public static class ControlProcessLauncher
    {
        private static readonly HttpClient _http = new HttpClient { Timeout = TimeSpan.FromSeconds(2) };

        public static int Port =>
            int.TryParse(ConfigurationManager.AppSettings["controlPort"], out var p) ? p : 38080;

        /// <summary>探活:control 的 /ping 是否可达。</summary>
        public static bool IsControlAlive()
        {
            try
            {
                var resp = _http.GetAsync($"http://127.0.0.1:{Port}/ping").GetAwaiter().GetResult();
                return resp.IsSuccessStatusCode;
            }
            catch { return false; }
        }

        /// <summary>
        /// 确保 control 在跑:已在→直接返回 true;不在→拉起并轮询就绪(最多 waitSeconds)。
        /// </summary>
        public static bool EnsureRunning(string account, string password, string cacheDisk,
            Action<string> log, int waitSeconds = 60)
        {
            log = log ?? (_ => { });
            if (IsControlAlive()) { log("control 已在运行,直接连接"); return true; }

            string exe = ResolveExePath();
            if (!File.Exists(exe)) { log("找不到 control.exe:" + exe); return false; }

            var psi = new ProcessStartInfo
            {
                FileName = exe,
                Arguments = $"--account={account} --password={password} --cacheDisk={cacheDisk} --port={Port}",
                UseShellExecute = true,   // requireAdministrator 进程需 ShellExecute 提权启动
                WindowStyle = ProcessWindowStyle.Hidden
            };
            try { Process.Start(psi); }
            catch (Exception ex) { log("拉起 control 失败:" + ex.Message); return false; }
            log("已拉起 control.exe,等待就绪…");

            for (int i = 0; i < waitSeconds; i++)
            {
                Thread.Sleep(1000);
                if (IsControlAlive()) { log("control 就绪"); return true; }
            }
            log("control 拉起后等待就绪超时");
            return false;
        }

        private static string ResolveExePath()
        {
            string rel = ConfigurationManager.AppSettings["controlExePath"]
                         ?? @"control\ivf_tl_ControlHost.exe";
            return Path.IsPathRooted(rel)
                ? rel
                : Path.Combine(AppDomain.CurrentDomain.BaseDirectory, rel);
        }
    }
}