generate realistic data

Maui.DataGrid.Sample/Utils/DummyDataProvider.cs

@@ -7,50 +7,64 @@ namespace Maui.DataGrid.Sample.Utils;
 
 internal static class DummyDataProvider
 {
-    private static List<Team>? _realTeams;
+    private static readonly List<Team> RealTeams = LoadTeamsFromResource();
 
     public static List<Team> GetTeams(int numberOfCopies = 1)
     {
-        if (_realTeams == null)
+        if (numberOfCopies == 1)
         {
-            var assembly = typeof(DummyDataProvider).GetTypeInfo().Assembly;
+            return RealTeams;
+        }
 
-            using var stream = assembly.GetManifestResourceStream("Maui.DataGrid.Sample.teams.json")
-                ?? throw new FileNotFoundException("Could not load teams.json");
+        return GenerateRandomTeams(numberOfCopies);
+    }
 
-            using var reader = new StreamReader(stream);
-            var json = reader.ReadToEnd();
+    private static List<Team> LoadTeamsFromResource()
+    {
+        var assembly = typeof(DummyDataProvider).GetTypeInfo().Assembly;
 
-            _realTeams = JsonSerializer.Deserialize<List<Team>>(json)
-                ?? throw new InvalidOperationException("Could not deserialize teams.json");
-        }
+        using var stream = assembly.GetManifestResourceStream("Maui.DataGrid.Sample.teams.json")
+            ?? throw new FileNotFoundException("Could not load teams.json");
 
-        if (numberOfCopies == 1)
-        {
-            return _realTeams;
-        }
+        using var reader = new StreamReader(stream);
+        var json = reader.ReadToEnd();
+
+        return JsonSerializer.Deserialize<List<Team>>(json)
+            ?? throw new InvalidOperationException("Could not deserialize teams.json");
+    }
 
-        var teams = new List<Team>(_realTeams);
+    private static List<Team> GenerateRandomTeams(int numberOfCopies)
+    {
+        var teams = new List<Team>(RealTeams);
 
         for (var i = 0; i < numberOfCopies; i++)
         {
-            foreach (var realTeam in _realTeams)
+            foreach (var realTeam in RealTeams)
             {
+                var totalGames = RandomNumberGenerator.GetInt32(72, 83); // Total games in a season
+                var won = RandomNumberGenerator.GetInt32(20, Math.Min(60, totalGames)); // Random wins between 20 and the lesser of 60 or total games
+                var lost = totalGames - won; // Losses are the remaining games
+                var homeWins = RandomNumberGenerator.GetInt32(10, Math.Min(won, totalGames / 2)); // Home wins between 10 and half of total games or total wins
+                var roadWins = won - homeWins; // Road wins are the remaining wins
+                var last10Wins = RandomNumberGenerator.GetInt32(0, Math.Min(10, won)); // Wins in the last 10 games, but not more than total wins
+                var streakResult = (GameResult)RandomNumberGenerator.GetInt32(0, 2); // Random streak result (Win or Loss)
+                var streakLength = Math.Min(10, streakResult == GameResult.Won ? won : lost); // Streak length between 0 and 10, but not more than total wins or losses
+
                 var randomTeam = new Team
                 {
                     Name = $"{realTeam.Name} {i}",
-                    Won = RandomNumberGenerator.GetInt32(0, 50),
-                    Lost = RandomNumberGenerator.GetInt32(0, 50),
-                    Percentage = Math.Round(RandomDouble() * 100) / 100,
+                    Won = won,
+                    Lost = lost,
+                    Percentage = (double)won / totalGames,
                     Conf = $"{realTeam.Conf} {RandomNumberGenerator.GetInt32(1, 10)}",
                     Div = $"{realTeam.Div} {RandomNumberGenerator.GetInt32(1, 10)}",
-                    Home = $"{RandomNumberGenerator.GetInt32(1, 10)}",
-                    Road = $"{RandomNumberGenerator.GetInt32(1, 10)}",
-                    Last10 = $"{RandomNumberGenerator.GetInt32(1, 10)}",
+                    Home = $"{homeWins}-{(totalGames / 2) - homeWins}", // Home record
+                    Road = $"{roadWins}-{(totalGames / 2) - roadWins}", // Road record
+                    Last10 = $"{last10Wins}-{10 - last10Wins}", // Last 10 games record
                     Streak = new Streak
                     {
-                        Result = (GameResult)RandomNumberGenerator.GetInt32(0, 2),
-                        NumStreak = RandomNumberGenerator.GetInt32(0, 10),
+                        Result = streakResult,
+                        NumStreak = streakLength,
                     },
                     Logo = realTeam.Logo,
                 };
@@ -61,6 +75,4 @@ public static List<Team> GetTeams(int numberOfCopies = 1)
 
         return teams;
     }
-
-    private static double RandomDouble() => (double)RandomNumberGenerator.GetInt32(int.MaxValue) / int.MaxValue;
 }