Preparing for the History query

WotBlitzStatisticsPro.Common/Model/AccountInfoHistoryResponse.cs

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+using System;
+
+namespace WotBlitzStatisticsPro.Common.Model
+{
+    /// <summary>
+    /// Information about player statistics history
+    /// </summary>
+    public class AccountInfoHistoryResponse
+    {
+        ///<summary>
+        /// Player account identifier
+        ///</summary>
+        public long AccountId { get; set; }
+
+        ///<summary>
+        /// Account creation date
+        ///</summary>
+        public DateTime CreatedAt { get; set; }
+
+        ///<summary>
+        /// Player's nick
+        ///</summary>
+        public string Nickname { get; set; }
+
+        /// <summary>
+        /// Overall statistics since account creation
+        /// </summary>
+        public ShortStatistics OverallAccountStatistics { get; set; }
+
+        /// <summary>
+        /// Statistics for period
+        /// </summary>
+        public ShortStatistics PeriodAccountStatistics { get; set; }
+
+        /// <summary>
+        /// Difference between start and end of the period
+        /// </summary>
+        public StatisticsDifference PeriodDifference { get; set; }
+
+        /// <summary>
+        /// The detailed history
+        /// </summary>
+        public StatisticsDifference[] StatisticsHistory { get; set; }
+    }
+}

WotBlitzStatisticsPro.Common/Model/ShortStatistics.cs

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+using System;
+
+namespace WotBlitzStatisticsPro.Common.Model
+{
+    /// <summary>
+    /// Short statistics info
+    /// </summary>
+    public class ShortStatistics
+    {
+        ///<summary>
+        /// Last battle time
+        ///</summary>
+        public DateTime LastBattleTime { get; set; }
+
+        ///<summary>
+        /// Battles count
+        ///</summary>
+        public long Battles { get; set; }
+
+        /// <summary>
+        /// Average tier
+        /// </summary>
+        public double AvgTier { get; set; }
+
+        /// <summary>
+        /// Wn7 coefficient
+        /// </summary>
+        public double Wn7 { get; set; }
+
+        /// <summary>
+        /// Player's win rate
+        /// </summary>
+        public decimal WinRate { get; set; }
+
+        /// <summary>
+        /// Player's average damage
+        /// </summary>
+        public decimal AvgDamage { get; set; }
+
+        /// <summary>
+        /// Player's average XP
+        /// </summary>
+        public decimal AvgXp { get; set; }
+
+    }
+}

WotBlitzStatisticsPro.Common/Model/StatisticsDifference.cs

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+using System;
+
+namespace WotBlitzStatisticsPro.Common.Model
+{
+    /// <summary>
+    /// The difference between current statistics state and previous
+    /// </summary>
+    public class StatisticsDifference
+    {
+        ///<summary>
+        /// Last battle time
+        ///</summary>
+        public DateTime LastBattleTime { get; set; }
+
+        ///<summary>
+        /// Difference in Battles count
+        ///</summary>
+        public StatisticsDifferenceItem<long> Battles { get; set; }
+
+        /// <summary>
+        /// Difference in Average tier
+        /// </summary>
+        public StatisticsDifferenceItem<double> AvgTier { get; set; }
+
+        /// <summary>
+        /// Difference in Wn7 coefficient
+        /// </summary>
+        public StatisticsDifferenceItem<double> Wn7 { get; set; }
+
+        /// <summary>
+        /// Difference in Player's win rate
+        /// </summary>
+        public StatisticsDifferenceItem<decimal> WinRate { get; set; }
+
+        /// <summary>
+        /// Difference in Player's average damage
+        /// </summary>
+        public StatisticsDifferenceItem<decimal> AvgDamage { get; set; }
+
+        /// <summary>
+        /// Difference in Player's average XP
+        /// </summary>
+        public StatisticsDifferenceItem<decimal> AvgXp { get; set; }
+
+    }
+}

WotBlitzStatisticsPro.Common/Model/StatisticsDifferenceItem.cs

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+namespace WotBlitzStatisticsPro.Common.Model
+{
+    /// <summary>
+    /// Represents the difference of one statistics parameter
+    /// </summary>
+    public class StatisticsDifferenceItem<T> where T: struct
+    {
+        /// <summary>
+        /// The current value of statistics item
+        /// </summary>
+        public T CurrentValue { get; set; }
+
+        /// <summary>
+        /// The difference between current and previous value
+        /// </summary>
+        public T? Difference { get; set; }
+    }
+}