using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Linq;
using System.Reflection;
using System.Text;
using DTS.Common.Storage;

// ReSharper disable RedundantEmptyDefaultSwitchBranch

// ReSharper disable once CheckNamespace
namespace DTS.Slice.Users.UserSettings
{
    /// <summary>
    /// user specific properties, stored in db
    /// 
    /// these are all the user specific settings we are storing in the db currently as generic settings
    /// we have a few user specific settings like last used hardware that are stored in other places, that maybe
    /// should be stored here as well
    /// 
    /// it's possible to retrieve all the settings at once (more efficient, only one db query), or retrieve settings individually
    /// one by one using the static accessors
    /// each setting has a default specified both in code and in the db.
    /// when retrieving a setting we fall back to the default if a user specific value is not found
    /// if the default setting in the db is not found, we can further fall back to the default specified in code
    /// 
    /// in the db we have a table that lists all the settings with their fall back default value
    /// we have a separate table that stores the user specific values for any of those settings, which may or may not match the fall
    /// back default value
    /// 
    /// the data should always be stored in invariant form in the db
    /// DisplayName, Description attributes translate so the properties can be displayed in a property grid
    /// </summary>
    public class UserHistory
    {

        #region properties

        [CategoryAttributeEx(PropertyEnums.PropertyCategories.UserHistory)]
        [PropertyId(PropertyEnums.PropertyIds.UsersCurrentTestSetup)]
        [DescriptionAttributeEx(PropertyEnums.PropertyIds.UsersCurrentTestSetup)]
        [DisplayAttributeEx(PropertyEnums.PropertyIds.UsersCurrentTestSetup)]
        [DefaultValue("")]
        [ReadOnly(true)]
        public string UsersCurrentTestSetup { get; set; }

        [CategoryAttributeEx(PropertyEnums.PropertyCategories.UserHistory)]
        [PropertyId(PropertyEnums.PropertyIds.LastRunTestSetup)]
        [DescriptionAttributeEx(PropertyEnums.PropertyIds.LastRunTestSetup)]
        [DisplayAttributeEx(PropertyEnums.PropertyIds.LastRunTestSetup)]
        [DefaultValue("")]
        [ReadOnly(true)]
        public string LastRunTestSetup { get; set; }

        [CategoryAttributeEx(PropertyEnums.PropertyCategories.UserHistory)]
        [PropertyId(PropertyEnums.PropertyIds.LastUsedSampleRate)]
        [DescriptionAttributeEx(PropertyEnums.PropertyIds.LastUsedSampleRate)]
        [DisplayAttributeEx(PropertyEnums.PropertyIds.LastUsedSampleRate)]
        [DefaultValue(20000D)]
        [ReadOnly(true)]
        public double LastUsedSampleRate { get; set; }

        [CategoryAttributeEx(PropertyEnums.PropertyCategories.UserHistory)]
        [PropertyId(PropertyEnums.PropertyIds.ApplySensorDataToBlankChannels)]
        [DescriptionAttributeEx(PropertyEnums.PropertyIds.ApplySensorDataToBlankChannels)]
        [DisplayAttributeEx(PropertyEnums.PropertyIds.ApplySensorDataToBlankChannels)]
        [DefaultValue(true)]
        [ReadOnly(true)]
        public bool ApplySensorDataToBlankChannels { get; set; }

        [CategoryAttributeEx(PropertyEnums.PropertyCategories.UserHistory)]
        [PropertyId(PropertyEnums.PropertyIds.ApplyHardwareAssignmentInHardwareDisco)]
        [DescriptionAttributeEx(PropertyEnums.PropertyIds.ApplyHardwareAssignmentInHardwareDisco)]
        [DisplayAttributeEx(PropertyEnums.PropertyIds.ApplyHardwareAssignmentInHardwareDisco)]
        [DefaultValue(true)]
        [ReadOnly(true)]
        [Browsable(false)]
        public bool ApplyHardwareAssignmentInHardwareDisco { get; set; }

        [CategoryAttributeEx(PropertyEnums.PropertyCategories.UserHistory)]
        [PropertyId(PropertyEnums.PropertyIds.ShowOptionsWhenApplyingSensorToBlankChannel)]
        [DescriptionAttributeEx(PropertyEnums.PropertyIds.ShowOptionsWhenApplyingSensorToBlankChannel)]
        [DisplayAttributeEx(PropertyEnums.PropertyIds.ShowOptionsWhenApplyingSensorToBlankChannel)]
        [DefaultValue(true)]
        [ReadOnly(true)]
        public bool ShowOptionsWhenApplyingSensorToBlankChannel { get; set; }

        #endregion properties

        #region Static Methods
        /// <summary>
        /// this function is designed to create any missing property settings if needed
        /// this might happen if the database table was just created for instance
        /// it will create defaults for all the settings in the db, and also settings for all users
        /// currently it's used by DataPRO.App
        /// </summary>
        public static void CreateAnyMissingUserHistory()
        {
            //get a list of all known properties
            var userHistory = new UserHistory();
            var properties = userHistory.GetType().GetProperties();
            var needToBeAdded = new Dictionary<int, PropertyInfo>();

            foreach (var property in properties)
            {
                var id = PropertyIdAttribute.GetPropertyId(property);
                needToBeAdded[id] = property;
            }
            //find if the property already exists in the db, if so, no need to add...
            using (var sql = DbOperations.GetSQLCommand(true))
            {
                try
                {
                    sql.CommandText = "SELECT [PropertyId] from [DefaultProperties]";
                    using (var ds = DbOperations.Connection.QueryDataSet(sql))
                    {
                        foreach (DataRow row in ds.Tables[0].Rows)
                        {
                            var id = Convert.ToInt32(row["PropertyId"]);
                            if (needToBeAdded.ContainsKey(id))
                            {
                                needToBeAdded.Remove(id);
                            }
                        }
                    }
                }
                finally
                {
                    sql.Connection.Dispose();
                }
            }
            //if we have nothing to add, we are all done
            if (needToBeAdded.Values.Count <= 0) return;

            //otherwise add the defaults
            using (var sql = DbOperations.GetSQLCommand(true))
            {
                try
                {
                    var sb = new StringBuilder();
                    sb.Append(DbOperations.BEGIN_STATEMENT);

                    using (var needToBeAddedEnumerator = needToBeAdded.GetEnumerator())
                    {
                        var iIndex = 0;
                        while (needToBeAddedEnumerator.MoveNext())
                        {
                            var currentProperty = needToBeAddedEnumerator.Current.Value;
                            sb.AppendFormat(
                                "INSERT INTO [DefaultProperties] ([PropertyId],[PropertyName],[DefaultValue]) VALUES (@1_{0}, @2_{0}, @3_{0});",
                                iIndex);
                            DbOperations.CreateParam(sql, string.Format("@1_{0}", iIndex), SqlDbType.Int,
                                PropertyIdAttribute.GetPropertyId(currentProperty));
                            DbOperations.CreateParam(sql, string.Format("@2_{0}", iIndex), SqlDbType.NVarChar,
                                PropertyIdAttribute.GetPropertyIdEnum(currentProperty).ToString());
                            DbOperations.CreateParam(sql, string.Format("@3_{0}", iIndex), SqlDbType.NVarChar,
                                TestSetupDefaults.GetDefaultValueAsString(currentProperty));
                            iIndex++;
                        }
                    }

                    sb.Append(DbOperations.COMMIT_STATEMENT);
                    sql.CommandText = sb.ToString();
                    DbOperations.Connection.ExecuteCommand(sql);
                }
                finally
                {
                    sql.Connection.Dispose();
                }
            }
            //finally add settings for any users we have currently
            TestSetupDefaults.CreateMissingUserSettingProperties(needToBeAdded.Values.ToArray());
        }

        #endregion

        #region methods

        #endregion
    }
}