using AwInitilizer.Assist;
using Newtonsoft.Json;
using System;
using System.Collections.Generic;
using System.Collections.Specialized;
using System.IO;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;

namespace AwInitilizer.Procedure.WifRssiCheck
{
    public enum ErrorType
    {
        None,
        WifiModeDataNotFound,
        WifiModeNotClient,
        WifiRssiDataNotFound,
        WifiRssiLow,
    }

    public enum LogEvent
    {
        WifiRssi
    }

    public class WifRssiCheckProcedure : ProcedureBase
    {
        public ErrorType Error { get; set; } = ErrorType.None;

        private ProcedureLog.LogWriter<WifRssiCheckProcedure, LogEvent> LogWriter;

        private readonly static Dictionary<LogEvent, string> ReportDict = new Dictionary<LogEvent, string>()
        {
            { LogEvent.WifiRssi, "WifiRssi" }
        };

        private readonly static Dictionary<LogEvent, string> LogDict = new Dictionary<LogEvent, string>()
        {
            { LogEvent.WifiRssi, "Get Wifi Rssi : {0}" }
        };

        public WifRssiCheckProcedure() : base()
        {
            Name = "WiFi Rssi Check";
            Content = "Check Wifi Rssi Signal";

            LogWriter = new ProcedureLog.LogWriter<WifRssiCheckProcedure, LogEvent>(this)
            {
                ReportPair = ReportDict,
                LogPair = LogDict
            };
        }

        internal override async Task<bool> Run()
        {
            if (!UpdateData.SystemID.ModelName.Network.ToString().Contains("WiFi"))
            {
                LogWriter.Log("Wifi not supported, skip procedure");

                return true;
            }

            var checkResult = await CheckWifiRssi();
            return checkResult;
        }

        internal async Task<bool> CheckWifiRssi()
        {
            var rssi = await GetWifiRssi();
            LogWriter.Report(LogEvent.WifiRssi, rssi.ToString());
            if (rssi == 0)
            {
                return false;
            }
            else
            {
                var rssiCheckPass = rssi >= -80;
                if (rssiCheckPass)
                    return true;
                else
                {
                    Error = ErrorType.WifiRssiLow;
                    return false;
                }
            }
        }

        internal async Task<int> GetWifiRssi()
        {
            try
            {
                using (WebClientTimeout webClient = new WebClientTimeout())
                {
                    NameValueCollection parameters = new NameValueCollection();
                    parameters.Add("opt", "3");
                    webClient.QueryString = parameters;

                    using (Stream stream = await webClient.OpenReadTaskAsync($"https://{ServerIpAddress}/get_query_action.php"))
                    // 使用 StreamReader 讀取 stream 內的字元
                    using (StreamReader reader = new StreamReader(stream))
                    {
                        // 將 StreamReader 所讀到的字元轉為 string
                        string request = reader.ReadToEnd();
                        LogWriter.Log($"GetResponse:{request}", isDebugLog: true);

                        Regex rx_mode = new Regex("(WifiMode)\\\": ([0-9]*)");
                        var matches_mode = rx_mode.Matches(request);

                        if (matches_mode.Count != 0)
                        {
                            var match = matches_mode[0];
                            if (match.Groups.Count != 3)
                            {
                                Error = ErrorType.WifiModeDataNotFound;
                                return 0;
                            }
                            else
                            {
                                if (int.TryParse(match.Groups[2].Value, out var wifiMode))
                                {
                                    if (wifiMode != 1)
                                    {
                                        Error = ErrorType.WifiModeNotClient;
                                        return 0;
                                    }
                                }
                            }
                        }
                        else
                        {
                            Error = ErrorType.WifiModeDataNotFound;
                            return 0;
                        }

                        Regex rx = new Regex("(WifiRssi)\\\": (-?[0-9]*)");
                        var matches = rx.Matches(request);

                        if (matches.Count != 0)
                        {
                            var match = matches[0];
                            if (match.Groups.Count != 3)
                            {
                                Error = ErrorType.WifiRssiDataNotFound;
                                return 0;
                            }
                            else
                            {
                                if (int.TryParse(match.Groups[2].Value, out var rssiSignal))
                                {
                                    return rssiSignal;
                                }
                                Error = ErrorType.WifiRssiDataNotFound;
                                return 0;
                            }
                        }
                        else
                        {
                            Error = ErrorType.WifiRssiDataNotFound;
                            return 0;
                        }
                    }
                }
            }
            catch (Exception e)
            {
                Error = ErrorType.WifiRssiDataNotFound;

                LogWriter.Log("Get Wifi Rssi Failed");
                LogWriter.Log(e.Message, isDebugLog: true);

                return 0;
            }
        }
    }
}