using Newtonsoft.Json;
using Newtonsoft.Json.Converters;
using Serilog.Events;
using System;
using System.Collections.Generic;
using System.Linq;
using TINK.Model.Connector;
using TINK.Services.BluetoothLock;
using TINK.Model.Services.CopriApi.ServerUris;
using TINK.Model.Services.Geolocation;
using TINK.Settings;
using TINK.ViewModel.Map;
using TINK.ViewModel.Settings;

namespace TINK.Model.Settings
{
    public static class JsonSettingsDictionary
    {
        /// <summary>Title of the settings file.</summary>
        public const string SETTINGSFILETITLE = "Setting.Json";

        /// <summary> Key of the app version entry. </summary>
        public const string APPVERIONKEY = "AppVersion";

        /// <summary> Key of the app version entry. </summary>
        public const string SHOWWHATSNEWKEY = "ShowWhatsNew";

        /// <summary> Key of the app version entry. </summary>
        public const string EXPIRESAFTER = "ExpiresAfter";

        /// <summary> Key of the connect timeout. </summary>
        public const string CONNECTTIMEOUT = "ConnectTimeout";

        /// <summary> Key of the logging level entry. </summary>
        public const string MINLOGGINGLEVELKEY = "MinimumLoggingLevel";

        /// <summary> Key of the logging level entry. </summary>
        public const string ISREPORTLEVELVERBOSEKEY = "IsReportLevelVerbose";

        /// <summary> Key of the center to ... entry. </summary>
        public const string CENTERMAPTOCURRENTLOCATION = "CenterMapToCurrentLocation";

        public const string LOGTOEXTERNALFOLDER = "LogToExternalFolder";

        public const string THEMEKEY = "Theme";

        public const string ISSITECACHINGON = "IsSiteCachingOn";

        /// <summary> Gets a nullable value.</summary>
        /// <param name="settingsJSON">Dictionary to get value from.</param>
        public static T? GetNullableEntry<T>(
            string keyName,
            Dictionary<string, string> settingsJSON) where T : struct
        {
            if (!settingsJSON.TryGetValue(keyName, out string boolText)
                || string.IsNullOrEmpty(boolText))
            {
                // File holds no entry.
                return null;
            }

            return JsonConvert.DeserializeObject<T>(boolText);
        }

        /// <summary> Gets a value to type class.</summary>
        /// <param name="settingsJSON">Dictionary to get value from.</param>
        public static T GetEntry<T>(
            string keyName,
            Dictionary<string, string> settingsJSON) where T : class
        {
            if (!settingsJSON.TryGetValue(keyName, out string boolText)
                || string.IsNullOrEmpty(boolText))
            {
                // File holds no entry.
                return null;
            }

            return JsonConvert.DeserializeObject<T>(boolText);
        }

        /// <summary> Sets a nullable.</summary>
        /// <param name="entry">Entry to add to dictionary.</param>
        /// <param name="keyName">Key to use for value. </param>
        /// <param name="targetDictionary">Dictionary to set value to.</param>
        public static Dictionary<string, string> SetEntry<T>(T entry, string keyName, IDictionary<string, string> targetDictionary)
        {
            // Set value.
            if (targetDictionary == null)
                throw new Exception($"Writing entry value {keyName} to dictionary failed. Dictionary must not be null.");

            return targetDictionary.Union(new Dictionary<string, string>
            {
                { keyName, JsonConvert.SerializeObject(entry) }
            }).ToDictionary(key => key.Key, value => value.Value);
        }

        /// <summary> Sets the timeout to apply when connecting to bluetooth lock.</summary>
        /// <param name="targetDictionary">Dictionary to write information to.</param>
        /// <param name="connectTimeout">Connect timeout value.</param>
        public static Dictionary<string, string> SetConnectTimeout(
            this IDictionary<string, string> targetDictionary, 
            TimeSpan connectTimeout)
        {
            if (targetDictionary == null)
                throw new Exception("Writing conntect timeout info failed. Dictionary must not be null.");

            return targetDictionary.Union(new Dictionary<string, string>
            {
                { CONNECTTIMEOUT, JsonConvert.SerializeObject(connectTimeout, new JavaScriptDateTimeConverter()) }
            }).ToDictionary(key => key.Key, value => value.Value);
        }
        /// <summary> Sets the uri of the active copri host. </summary>
        /// <param name="settingsJSON">Dictionary holding parameters from JSON.</param>
        public static Dictionary<string, string> SetCopriHostUri(this IDictionary<string, string> p_oTargetDictionary, string p_strNextActiveUriText)
        {
            if (p_oTargetDictionary == null)
                throw new Exception("Writing copri host uri to dictionary failed. Dictionary must not be null.");

            return p_oTargetDictionary.Union(new Dictionary<string, string>
            {
                { typeof(CopriServerUriList).ToString(), JsonConvert.SerializeObject(p_strNextActiveUriText) },
            }).ToDictionary(key => key.Key, value => value.Value);
        }

        /// <summary> Gets the timeout to apply when connecting to bluetooth lock.</summary>
        /// <param name="settingsJSON">Dictionary to get information from.</param>
        /// <returns>Connect timeout value.</returns>
        public static TimeSpan? GetConnectTimeout(Dictionary<string, string> settingsJSON)
        {
            if (!settingsJSON.TryGetValue(CONNECTTIMEOUT, out string connectTimeout)
                || string.IsNullOrEmpty(connectTimeout))
            {
                // File holds no entry.
                return null;
            }

            return JsonConvert.DeserializeObject<TimeSpan>(connectTimeout, new JavaScriptDateTimeConverter());
        }
        /// <summary> Gets the logging level.</summary>
        /// <param name="settingsJSON">Dictionary to get logging level from.</param>
        /// <returns>Logging level</returns>
        public static Uri GetCopriHostUri(this IDictionary<string, string> settingsJSON)
        {
            // Get uri of corpi server.
            if (!settingsJSON.TryGetValue(typeof(CopriServerUriList).ToString(), out string uriText)
                || string.IsNullOrEmpty(uriText))
            {
                // File holds no entry.
                return null;
            }


            return JsonConvert.DeserializeObject<Uri>(uriText);
        }

        /// <summary> Sets the version of the app. </summary>
        /// <param name="settingsJSON">Dictionary holding parameters from JSON.</param>
        public static Dictionary<string, string> SetAppVersion(this IDictionary<string, string> p_oTargetDictionary, Version p_strAppVersion)
        {
            if (p_oTargetDictionary == null)
                throw new Exception("Writing copri host uri to dictionary failed. Dictionary must not be null.");

            return p_oTargetDictionary.Union(new Dictionary<string, string>
            {
                {APPVERIONKEY , JsonConvert.SerializeObject(p_strAppVersion, new VersionConverter()) },
            }).ToDictionary(key => key.Key, value => value.Value);
        }

        /// <summary> Gets the app versions.</summary>
        /// <param name="settingsJSON">Dictionary to get logging level from.</param>
        /// <returns>Logging level</returns>
        public static Version GetAppVersion(this IDictionary<string, string> settingsJSON)
        {
            // Get the version of the app which wrote the settings file.
            if (!settingsJSON.TryGetValue(APPVERIONKEY, out string l_oAppVersion)
                || string.IsNullOrEmpty(l_oAppVersion))
            {
                // File holds no entry.
                return null;
            }

            return l_oAppVersion.TrimStart().StartsWith("\"")
                ? JsonConvert.DeserializeObject<Version>(l_oAppVersion, new VersionConverter())
                : Version.Parse(l_oAppVersion); // Format used up to version 3.0.0.115
        }


        /// <summary> Sets whether polling is on or off and the periode if polling is on. </summary>
        /// <param name="settingsJSON">Dictionary to write entries to.</param>
        public static Dictionary<string, string> SetPollingParameters(this IDictionary<string, string> p_oTargetDictionary, PollingParameters p_oPollingParameter)
        {
            if (p_oTargetDictionary == null)
                throw new Exception("Writing polling parameters to dictionary failed. Dictionary must not be null.");

            return p_oTargetDictionary.Union(new Dictionary<string, string>
            {
                { $"{typeof(PollingParameters).Name}_{typeof(TimeSpan).Name}", JsonConvert.SerializeObject(p_oPollingParameter.Periode) },
                { $"{typeof(PollingParameters).Name}_{typeof(bool).Name}", JsonConvert.SerializeObject(p_oPollingParameter.IsActivated) },
            }).ToDictionary(key => key.Key, value => value.Value);
        }

        /// <summary> Get whether polling is on or off and the periode if polling is on. </summary>
        /// <param name="settingsJSON">Dictionary holding parameters from JSON.</param>
        /// <returns>Polling parameters.</returns>
        public static PollingParameters GetPollingParameters(this IDictionary<string, string> settingsJSON)
        {
            // Check if dictionary contains entry for periode.
            if (settingsJSON.TryGetValue($"{typeof(PollingParameters).Name}_{typeof(TimeSpan).Name}", out string l_strPeriode)
                && settingsJSON.TryGetValue($"{typeof(PollingParameters).Name}_{typeof(bool).Name}", out string l_strIsActive)
                && !string.IsNullOrEmpty(l_strPeriode)
                && !string.IsNullOrEmpty(l_strIsActive))
            {
                return new PollingParameters(
                    JsonConvert.DeserializeObject<TimeSpan>(l_strPeriode),
                    JsonConvert.DeserializeObject<bool>(l_strIsActive));

            }

            return null;
        }

        /// <summary> Saves object to file. </summary>
        /// <param name="p_SettingsList">Settings to save.</param>
        public static void Serialize(string p_strSettingsFileFolder, IDictionary<string, string> p_SettingsList)
        {
            // Save settings to file.
            var l_oText = JsonConvert.SerializeObject(p_SettingsList, Formatting.Indented);
            var l_oFolder = p_strSettingsFileFolder;
            System.IO.File.WriteAllText($"{l_oFolder}{System.IO.Path.DirectorySeparatorChar}{SETTINGSFILETITLE}", l_oText);
        }

        /// <summary> Gets TINK app settings form xml- file. </summary>
        /// <param name="p_strSettingsDirectory">Directory to read settings from.</param>
        /// <returns>Dictionary of settings.</returns>
        public static Dictionary<string, string> Deserialize(string p_strSettingsDirectory)
        {
            var l_oFileName = $"{p_strSettingsDirectory}{System.IO.Path.DirectorySeparatorChar}{SETTINGSFILETITLE}";

            if (!System.IO.File.Exists(l_oFileName))
            {
                // File is empty. Nothing to read.
                return new Dictionary<string, string>(); ;
            }

            var l_oJSONFile = System.IO.File.ReadAllText(l_oFileName);

            if (string.IsNullOrEmpty(l_oJSONFile))
            {
                // File is empty. Nothing to read.
                return new Dictionary<string, string>();
            }

            // Load setting file.
            return JsonConvert.DeserializeObject<Dictionary<string, string>>(l_oJSONFile);
        }

        /// <summary> Gets the logging level.</summary>
        /// <param name="settingsJSON">Dictionary to get logging level from.</param>
        /// <returns>Logging level.</returns>
        public static LogEventLevel? GetMinimumLoggingLevel(
            Dictionary<string, string> settingsJSON)
        {
            // Get logging level.
            if (!settingsJSON.TryGetValue(MINLOGGINGLEVELKEY, out string l_strLevel)
                || string.IsNullOrEmpty(l_strLevel))
            {
                // File holds no entry.
                return null;
            }

            return (LogEventLevel)int.Parse(JsonConvert.DeserializeObject<string>(l_strLevel));
        }

        /// <summary> Gets a value indicating whether report level is verbose or not.</summary>
        /// <param name="settingsJSON">Dictionary to get value from.</param>
        public static bool? GetIsReportLevelVerbose(Dictionary<string, string> settingsJSON) => GetNullableEntry<bool>(ISREPORTLEVELVERBOSEKEY, settingsJSON);

        /// <summary> Sets a value indicating whether  report level is verbose or not.</summary>
        /// <param name="settingsJSON">Dictionary to get value from.</param>
        public static Dictionary<string, string> SetIsReportLevelVerbose(this IDictionary<string, string> targetDictionary, bool isReportLevelVerbose)
            => SetEntry(isReportLevelVerbose, ISREPORTLEVELVERBOSEKEY, targetDictionary);


        /// <summary> Sets the logging level.</summary>
        /// <param name="settingsJSON">Dictionary to get logging level from.</param>
        public static Dictionary<string, string> SetMinimumLoggingLevel(this IDictionary<string, string> p_oTargetDictionary, LogEventLevel p_oLevel)
        {
            // Set logging level.
            if (p_oTargetDictionary == null)
                throw new Exception("Writing logging level to dictionary failed. Dictionary must not be null.");

            return p_oTargetDictionary.Union(new Dictionary<string, string>
            {
                { MINLOGGINGLEVELKEY, JsonConvert.SerializeObject((int)p_oLevel) }
            }).ToDictionary(key => key.Key, value => value.Value);
        }

        /// <summary> Gets the version of app when whats new was shown.</summary>
        /// <param name="settingsJSON">Dictionary to get logging level from.</param>
        /// <returns>Version of the app.</returns>
        public static Version GetWhatsNew(Dictionary<string, string> settingsJSON)
        {
            // Get logging level.
            if (!settingsJSON.TryGetValue(SHOWWHATSNEWKEY, out string l_strWhatsNewVersion)
                || string.IsNullOrEmpty(l_strWhatsNewVersion))
            {
                // File holds no entry.
                return null;
            }

            return JsonConvert.DeserializeObject<Version>(l_strWhatsNewVersion, new VersionConverter());
        }

        /// <summary> Sets the version of app when whats new was shown.</summary>
        /// <param name="settingsJSON">Dictionary to get information from.</param>
        public static Dictionary<string, string> SetWhatsNew(this IDictionary<string, string> p_oTargetDictionary, Version p_oAppVersion)
        {
            // Set logging level.
            if (p_oTargetDictionary == null)
                throw new Exception("Writing WhatsNew info failed. Dictionary must not be null.");

            return p_oTargetDictionary.Union(new Dictionary<string, string>
            {
                { SHOWWHATSNEWKEY, JsonConvert.SerializeObject(p_oAppVersion, new VersionConverter()) }
            }).ToDictionary(key => key.Key, value => value.Value);
        }

        /// <summary> Gets the expires after value.</summary>
        /// <param name="settingsJSON">Dictionary to get expries after value from.</param>
        /// <returns>Expires after value.</returns>
        public static TimeSpan? GetExpiresAfter(Dictionary<string, string> settingsJSON)
        {
            if (!settingsJSON.TryGetValue(EXPIRESAFTER, out string expiresAfter)
                || string.IsNullOrEmpty(expiresAfter))
            {
                // File holds no entry.
                return null;
            }

            return JsonConvert.DeserializeObject<TimeSpan>(expiresAfter, new JavaScriptDateTimeConverter());
        }

        /// <summary> Sets the the expiration time.</summary>
        /// <param name="settingsJSON">Dictionary to write information to.</param>
        public static Dictionary<string, string> SetExpiresAfter(this IDictionary<string, string> p_oTargetDictionary, TimeSpan expiresAfter)
        {
            if (p_oTargetDictionary == null)
                throw new Exception("Writing ExpiresAfter info failed. Dictionary must not be null.");

            return p_oTargetDictionary.Union(new Dictionary<string, string>
            {
                { EXPIRESAFTER, JsonConvert.SerializeObject(expiresAfter, new JavaScriptDateTimeConverter()) }
            }).ToDictionary(key => key.Key, value => value.Value);
        }

        /// <summary> Sets the active lock service name. </summary>
        /// <param name="targetDictionary">Dictionary holding parameters from JSON.</param>
        public static Dictionary<string, string> SetActiveLockService(this  IDictionary<string, string> targetDictionary, string activeLockService)
        {
            if (targetDictionary == null)
                throw new Exception("Writing active lock service name to dictionary failed. Dictionary must not be null.");

            return targetDictionary.Union(new Dictionary<string, string>
            {
                { typeof(ILocksService).Name, activeLockService },
            }).ToDictionary(key => key.Key, value => value.Value);
        }

        /// <summary> Gets the active lock service name.</summary>
        /// <param name="settingsJSON">Dictionary to get logging level from.</param>
        /// <returns>Active lock service name.</returns>
        public static string GetActiveLockService(this IDictionary<string, string> settingsJSON)
        {
            // Get uri of corpi server.
            if (!settingsJSON.TryGetValue(typeof(ILocksService).Name, out string activeLockService)
                || string.IsNullOrEmpty(activeLockService))
            {
                // File holds no entry.
                return null;
            }

            if (activeLockService == "TINK.Services.BluetoothLock.BLE.LockItByScanService")
            {
                // Name of this service was switched.
                return typeof(TINK.Services.BluetoothLock.BLE.LockItByScanServicePolling).FullName;
            }

            return activeLockService;
        }

        /// <summary> Sets the active Geolocation service name. </summary>
        /// <param name="targetDictionary">Dictionary holding parameters from JSON.</param>
        public static Dictionary<string, string> SetActiveGeolocationService(
            this IDictionary<string, string> targetDictionary,
            string activeGeolocationService)
        {
            if (targetDictionary == null)
                throw new Exception("Writing active geolocation service name to dictionary failed. Dictionary must not be null.");

            return targetDictionary.Union(new Dictionary<string, string>
            {
                { typeof(IGeolocation).Name, activeGeolocationService },
            }).ToDictionary(key => key.Key, value => value.Value);
        }

        /// <summary> Gets the active Geolocation service name.</summary>
        /// <param name="settingsJSON">Dictionary to get name of geolocation service from.</param>
        /// <returns>Active lock service name.</returns>
        public static string GetActiveGeolocationService(this IDictionary<string, string> settingsJSON)
        {
            // Get uri of corpi server.
            if (!settingsJSON.TryGetValue(typeof(IGeolocation).Name, out string activeGeolocationService)
                || string.IsNullOrEmpty(activeGeolocationService))
            {
                // File holds no entry.
                return null;
            }

            return activeGeolocationService;
        }

        /// <summary> Gets a value indicating whether to center the map to location or not.</summary>
        /// <param name="settingsJSON">Dictionary to get value from.</param>
        public static bool? GetCenterMapToCurrentLocation(Dictionary<string, string> settingsJSON) => GetNullableEntry<bool>(CENTERMAPTOCURRENTLOCATION, settingsJSON);

        /// <summary> Sets a value indicating whether to center the map to location or not.</summary>
        /// <param name="settingsJSON">Dictionary to get value from.</param>
        public static Dictionary<string, string> SetCenterMapToCurrentLocation(this IDictionary<string, string> targetDictionary, bool centerMapToCurrentLocation)
            => SetEntry(centerMapToCurrentLocation, CENTERMAPTOCURRENTLOCATION, targetDictionary);

        /// <summary> Gets whether to store logging data on SD card or not.</summary>
        /// <param name="settingsJSON">Dictionary to get value from.</param>
        public static bool? GetLogToExternalFolder(Dictionary<string, string> settingsJSON) => GetNullableEntry<bool>(LOGTOEXTERNALFOLDER, settingsJSON);

        /// <summary> Gets full class name of active theme.</summary>
        /// <param name="settingsJSON">Dictionary to get value from.</param>
        public static string GetActiveTheme(Dictionary<string, string> settingsJSON) => GetEntry<string>(THEMEKEY, settingsJSON);

        /// <summary> Gets a value indicating whether site caching is on or off.</summary>
        /// <param name="settingsJSON">Dictionary to get value from.</param>
        public static bool? GetIsSiteCachingOn(Dictionary<string, string> settingsJSON) => GetNullableEntry<bool>(ISSITECACHINGON, settingsJSON);

        /// <summary> Sets whether to store logging data on SD card or not.</summary>
        /// <param name="settingsJSON">Dictionary to get value from.</param>
        public static Dictionary<string, string> SetLogToExternalFolder(this IDictionary<string, string> targetDictionary, bool useSdCard) => SetEntry(useSdCard, LOGTOEXTERNALFOLDER, targetDictionary);

        /// <summary> Sets active theme.</summary>
        /// <param name="targetDictionary">Dictionary to set value to.</param>
        public static Dictionary<string, string> SetActiveTheme(this IDictionary<string, string> targetDictionary, string theme) => SetEntry(theme, THEMEKEY, targetDictionary);

        /// <summary> Sets whether site caching is on or off.</summary>
        /// <param name="settingsJSON">Dictionary to get value from.</param>
        public static Dictionary<string, string> SetIsSiteCachingOn(this IDictionary<string, string> targetDictionary, bool useSdCard) => SetEntry(useSdCard, ISSITECACHINGON, targetDictionary);
        
        /// <summary> Gets the map page filter. </summary>
        /// <param name="settings">Settings objet to load from.</param>
        public static IGroupFilterMapPage GetGroupFilterMapPage(this IDictionary<string, string> settings)
        {
            var l_oKeyName = "FilterCollection_MapPageFilter";
            if (settings == null || !settings.ContainsKey(l_oKeyName))
            {
                return null;
            }

            return new GroupFilterMapPage(JsonConvert.DeserializeObject<IDictionary<string, FilterState>>(settings[l_oKeyName]));
        }

        public static IDictionary<string, string> SetGroupFilterMapPage(
            this IDictionary<string, string> settings,
            IDictionary<string, FilterState> p_oFilterCollection)
        {
            if (settings == null
                || p_oFilterCollection == null
                || p_oFilterCollection.Count < 1)
            {
                return settings;
            }

            settings["FilterCollection_MapPageFilter"] = JsonConvert.SerializeObject(p_oFilterCollection);
            return settings;
        }

        /// <summary> Gets the settings filter. </summary>
        /// <param name="settings">Settings objet to load from.</param>
        public static IGroupFilterSettings GetGoupFilterSettings(this IDictionary<string, string> settings)
        {
            var l_oKeyName = "FilterCollection";
            if (settings == null || !settings.ContainsKey(l_oKeyName))
            {
                return null;
            }

            var legacyFilterCollection = new GroupFilterSettings(JsonConvert.DeserializeObject<IDictionary<string, FilterState>>(settings[l_oKeyName]));

            // Process legacy entries.
            var updatedFilterCollection = legacyFilterCollection.Where(x => x.Key.ToUpper() != "TINK.SMS" && x.Key.ToUpper() != "TINK.COPRI").ToDictionary(x => x.Key, x => x.Value);
            if (legacyFilterCollection.Count() <= updatedFilterCollection.Count())
            {
                // No legacy entries "INK.SMS" or "TINK.COPRI" found.
                return legacyFilterCollection;
            }

            var list = updatedFilterCollection.ToList();

            updatedFilterCollection.Add(
                "TINK",
                legacyFilterCollection.Any(x => x.Key.ToUpper() == "TINK.COPRI") ? legacyFilterCollection.FirstOrDefault(x => x.Key.ToUpper() == "TINK.COPRI").Value : FilterState.Off);

            return new GroupFilterSettings(updatedFilterCollection);
        }

        public static IDictionary<string, string> SetGroupFilterSettings(
            this IDictionary<string, string> settings,
            IDictionary<string, FilterState> p_oFilterCollection)
        {
            if (settings == null
                || p_oFilterCollection == null
                || p_oFilterCollection.Count < 1)
            {
                return settings;
            }

            settings["FilterCollection"] = JsonConvert.SerializeObject(p_oFilterCollection);
            return settings;
        }
    }
}