From 173e938c49d5e6e598bf00b43406f2456065a073 Mon Sep 17 00:00:00 2001
From: Charles Le Maux <charles.le-maux@epitech.eu>
Date: Tue, 8 Oct 2024 13:33:37 +0200
Subject: [PATCH] [+] Benchmarking solution for database queries

---
 Database/Benchmark.cs | 150 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 150 insertions(+)
 create mode 100644 Database/Benchmark.cs

diff --git a/Database/Benchmark.cs b/Database/Benchmark.cs
new file mode 100644
index 0000000..ec709ef
--- /dev/null
+++ b/Database/Benchmark.cs
@@ -0,0 +1,150 @@
+using System.Diagnostics;
+using Faker;
+using Microsoft.EntityFrameworkCore;
+
+namespace Simple_API.Database;
+
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+
+public class Benchmark (Database context)
+{
+    
+    private readonly HashSet<string> _usedFirstNames = new HashSet<string>();
+    private readonly HashSet<string> _usedLastNames = new HashSet<string>();
+
+    public async Task<TimeSpan> GenerateRandomUsersAsync(int numberOfUsers)
+    {
+        var random = new Random();
+        var users = new List<User>();
+
+        for (int i = 0; i < numberOfUsers; i++)
+        {
+            var firstName = GenerateRandomFirstName();
+            var lastName = GenerateRandomLastName();
+            var email = $"{firstName.ToLower()}.{lastName.ToLower()}@hub-harmony.fr";
+            var phoneNumber = $"+33 6 {GenerateRandomPhoneNumber()}";
+            var birthday = GenerateRandomBirthday(random);
+            var password = GenerateRandomPassword();
+
+            var uniqueId = await DatabaseUtils.GenerateUniqueIdAsync(context);
+
+            var user = new User
+            {
+                Id = uniqueId,
+                FirstName = firstName,
+                LastName = lastName,
+                Email = email,
+                Password = LightCrypto.HashPassword(password),
+                Birthday = birthday,
+                PhoneNumber = phoneNumber,
+                CreatedAt = DateTime.UtcNow,
+                IsAdmin = false
+            };
+
+            users.Add(user);
+        }
+
+        var watch = Stopwatch.StartNew();
+        TimeSpan time;
+
+        try
+        {
+            await context.Users.AddRangeAsync(users);
+            await context.SaveChangesAsync();
+        }
+        catch (DbUpdateException e)
+        {
+            throw new Exception($"Error: Could not create users. {e.Message}");
+        }
+        catch (Exception ex)
+        {
+            throw new Exception($"Error: Could not create users. {ex.Message}");
+        }
+        finally
+        {
+            watch.Stop();
+            time = watch.Elapsed;
+        }
+        return time;
+    }
+    
+    private string GenerateRandomFirstName()
+    {
+        string name;
+        do
+        {
+            name = Name.First();
+        } while (_usedFirstNames.Contains(name));
+
+        _usedFirstNames.Add(name);
+        return name;
+    }
+
+    private string GenerateRandomLastName()
+    {
+        string name;
+        do
+        {
+            name = Name.Last();
+        } while (_usedLastNames.Contains(name));
+
+        _usedLastNames.Add(name);
+        return name;
+    }
+
+    private string GenerateRandomPhoneNumber()
+    {
+        Random random = new Random();
+        return string.Join("", Enumerable.Range(0, 8).Select(_ => random.Next(0, 10).ToString()));
+    }
+
+    private DateTime GenerateRandomBirthday(Random random)
+    {
+        int year = random.Next(DateTime.Now.Year - 80, DateTime.Now.Year);
+        int month = random.Next(1, 13);
+        int day;
+
+        if (month == 2)
+        {
+            day = random.Next(1, 29);
+        }
+        else if (month == 4 || month == 6 || month == 9 || month == 11)
+        {
+            day = random.Next(1, 31);
+        }
+        else
+        {
+            day = random.Next(1, 32);
+        }
+
+        return new DateTime(year, month, day);
+    }
+
+    private string GenerateRandomPassword()
+    {
+        const string lowerChars = "abcdefghijklmnopqrstuvwxyz";
+        const string upperChars = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
+        const string digits = "0123456789";
+        const string specialChars = "@$!%*?&";
+
+        Random random = new Random();
+        
+        char[] passwordChars = new char[12];
+        
+        passwordChars[0] = lowerChars[random.Next(lowerChars.Length)];
+        passwordChars[1] = upperChars[random.Next(upperChars.Length)];
+        passwordChars[2] = digits[random.Next(digits.Length)];
+        passwordChars[3] = specialChars[random.Next(specialChars.Length)];
+
+        for (int i = 4; i < passwordChars.Length; i++)
+        {
+            string allChars = lowerChars + upperChars + digits + specialChars;
+            passwordChars[i] = allChars[random.Next(allChars.Length)];
+        }
+
+        return new string(passwordChars.OrderBy(x => random.Next()).ToArray());
+    }
+}
\ No newline at end of file