Add stats for kaigen

src/Managing.Api/Controllers/DataController.cs

@@ -1,9 +1,12 @@
 using Managing.Application.Abstractions;
 using Managing.Application.Abstractions.Services;
 using Managing.Application.Hubs;
+using Managing.Application.ManageBot.Commands;
 using Managing.Application.Workers.Abstractions;
+using Managing.Api.Models.Responses;
 using Managing.Domain.Candles;
 using Managing.Domain.Statistics;
+using MediatR;
 using Microsoft.AspNetCore.Authorization;
 using Microsoft.AspNetCore.Mvc;
 using Microsoft.AspNetCore.SignalR;
@@ -16,7 +19,6 @@ namespace Managing.Api.Controllers;
 /// Requires authorization for access.
 /// </summary>
 [ApiController]
-[Authorize]
 [Route("[controller]")]
 public class DataController : ControllerBase
 {
@@ -25,6 +27,7 @@ public class DataController : ControllerBase
     private readonly ICacheService _cacheService;
     private readonly IStatisticService _statisticService;
     private readonly IHubContext<CandleHub> _hubContext;
+    private readonly IMediator _mediator;
 
     /// <summary>
     /// Initializes a new instance of the <see cref="DataController"/> class.
@@ -34,18 +37,21 @@ public class DataController : ControllerBase
     /// <param name="cacheService">Service for caching data.</param>
     /// <param name="statisticService">Service for statistical analysis.</param>
     /// <param name="hubContext">SignalR hub context for real-time communication.</param>
+    /// <param name="mediator">Mediator for handling commands and queries.</param>
     public DataController(
         IExchangeService exchangeService,
         IAccountService accountService,
         ICacheService cacheService,
         IStatisticService statisticService,
-        IHubContext<CandleHub> hubContext)
+        IHubContext<CandleHub> hubContext,
+        IMediator mediator)
     {
         _exchangeService = exchangeService;
         _accountService = accountService;
         _cacheService = cacheService;
         _statisticService = statisticService;
         _hubContext = hubContext;
+        _mediator = mediator;
     }
 
     /// <summary>
@@ -72,6 +78,7 @@ public class DataController : ControllerBase
     /// Retrieves the latest spotlight overview, using caching to enhance response times.
     /// </summary>
     /// <returns>A <see cref="SpotlightOverview"/> object containing spotlight data.</returns>
+    [Authorize]
     [HttpGet("Spotlight")]
     public ActionResult<SpotlightOverview> GetSpotlight()
     {
@@ -94,10 +101,110 @@ public class DataController : ControllerBase
     /// <param name="startDate">The start date for the candle data.</param>
     /// <param name="timeframe">The timeframe for the candle data.</param>
     /// <returns>A list of <see cref="Candle"/> objects.</returns>
+    [Authorize]
     [HttpGet("GetCandles")]
     public async Task<ActionResult<List<Candle>>> GetCandles(TradingExchanges exchange, Ticker ticker,
         DateTime startDate, Timeframe timeframe)
     {
         return Ok(await _exchangeService.GetCandlesInflux(exchange, ticker, startDate, timeframe));
     }
+
+    /// <summary>
+    /// Retrieves statistics about currently running bots and their change in the last 24 hours.
+    /// </summary>
+    /// <returns>A <see cref="StrategiesStatisticsViewModel"/> containing bot statistics.</returns>
+    [HttpGet("GetStrategiesStatistics")]
+    public async Task<ActionResult<StrategiesStatisticsViewModel>> GetStrategiesStatistics()
+    {
+        const string cacheKey = "StrategiesStatistics";
+        const string previousCountKey = "PreviousBotsCount";
+
+        // Check if the statistics are already cached
+        var cachedStats = _cacheService.GetValue<StrategiesStatisticsViewModel>(cacheKey);
+
+        if (cachedStats != null)
+        {
+            return Ok(cachedStats);
+        }
+
+        // Get active bots
+        var activeBots = await _mediator.Send(new GetActiveBotsCommand());
+        var currentCount = activeBots.Count;
+
+        // Get previous count from cache
+        var previousCount = _cacheService.GetValue<int>(previousCountKey);
+
+        // Calculate change - if no previous value, set current count as the change (all are new)
+        int change;
+        if (previousCount == 0)
+        {
+            // First time running - assume all bots are new (positive change)
+            change = currentCount;
+        }
+        else
+        {
+            // Calculate actual difference between current and previous count
+            change = currentCount - previousCount;
+        }
+
+        // Create the response
+        var botsStatistics = new StrategiesStatisticsViewModel
+        {
+            TotalStrategiesRunning = currentCount,
+            ChangeInLast24Hours = change
+        };
+
+        // Store current count for future comparison (with 24 hour expiration)
+        _cacheService.SaveValue(previousCountKey, currentCount, TimeSpan.FromHours(24));
+
+        // Cache the statistics for 5 minutes
+        _cacheService.SaveValue(cacheKey, botsStatistics, TimeSpan.FromMinutes(5));
+
+        return Ok(botsStatistics);
+    }
+
+    /// <summary>
+    /// Retrieves the top 3 performing strategies based on ROI.
+    /// </summary>
+    /// <returns>A <see cref="TopStrategiesViewModel"/> containing the top performing strategies.</returns>
+    [HttpGet("GetTopStrategies")]
+    public async Task<ActionResult<TopStrategiesViewModel>> GetTopStrategies()
+    {
+        const string cacheKey = "TopStrategies";
+        
+        // Check if the top strategies are already cached
+        var cachedStrategies = _cacheService.GetValue<TopStrategiesViewModel>(cacheKey);
+        
+        if (cachedStrategies != null)
+        {
+            return Ok(cachedStrategies);
+        }
+        
+        // Get active bots
+        var activeBots = await _mediator.Send(new GetActiveBotsCommand());
+        
+        // Calculate PnL for each bot once and store in a list of tuples
+        var botsWithPnL = activeBots
+            .Select(bot => new { Bot = bot, PnL = bot.GetProfitAndLoss() })
+            .OrderByDescending(item => item.PnL)
+            .Take(3)
+            .ToList();
+        
+        // Map to view model
+        var topStrategies = new TopStrategiesViewModel
+        {
+            TopStrategies = botsWithPnL
+                .Select(item => new StrategyPerformance
+                {
+                    StrategyName = item.Bot.Name,
+                    PnL = item.PnL
+                })
+                .ToList()
+        };
+        
+        // Cache the result for 10 minutes
+        _cacheService.SaveValue(cacheKey, topStrategies, TimeSpan.FromMinutes(10));
+        
+        return Ok(topStrategies);
+    }
 }