Initial commit to new repository

src/AxCopilot/Services/UsageStatisticsService.cs

@@ -0,0 +1,212 @@
+using System.IO;
+using System.Text.Json;
+using AxCopilot.Models;
+
+namespace AxCopilot.Services;
+
+/// <summary>
+/// 일별 사용 통계를 기록하고 조회합니다.
+/// 저장 위치: %APPDATA%\AxCopilot\stats\YYYY-MM-DD.json
+/// 30일 초과 파일은 자동 삭제(롤링).
+/// </summary>
+internal static class UsageStatisticsService
+{
+    private static readonly string _statsDir = Path.Combine(
+        Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData),
+        "AxCopilot", "stats");
+
+    private static DailyUsageStats _today = new();
+    private static bool _initialized;
+    private static readonly object _lock = new();
+    private const int RetentionDays = 30;
+
+    // ─── 공개 API ────────────────────────────────────────────────────────────
+
+    public static void RecordLauncherOpen()
+    {
+        EnsureInitialized();
+        lock (_lock) { _today.LauncherOpens++; }
+        _ = SaveTodayAsync();
+    }
+
+    public static void RecordCommandUsage(string commandKey)
+    {
+        if (string.IsNullOrWhiteSpace(commandKey)) return;
+        EnsureInitialized();
+        lock (_lock)
+        {
+            _today.CommandUsage.TryGetValue(commandKey, out var cur);
+            _today.CommandUsage[commandKey] = cur + 1;
+        }
+        _ = SaveTodayAsync();
+    }
+
+    public static void AddActiveSeconds(int seconds)
+    {
+        if (seconds <= 0) return;
+        EnsureInitialized();
+        lock (_lock) { _today.ActiveSeconds += seconds; }
+        _ = SaveTodayAsync();
+    }
+
+    /// <summary>당일 기록된 PC 활성 시간(초)을 반환합니다. 재시작 전 누적분 포함.</summary>
+    public static int GetTodayActiveSeconds()
+    {
+        EnsureInitialized();
+        lock (_lock) { return _today.ActiveSeconds; }
+    }
+
+    /// <summary>AX Agent 대화를 탭별로 기록합니다.</summary>
+    public static void RecordChat(string tab)
+    {
+        if (string.IsNullOrWhiteSpace(tab)) tab = "Chat";
+        EnsureInitialized();
+        lock (_lock)
+        {
+            _today.ChatCounts.TryGetValue(tab, out var cur);
+            _today.ChatCounts[tab] = cur + 1;
+        }
+        _ = SaveTodayAsync();
+    }
+
+    /// <summary>토큰 사용량을 기록합니다.</summary>
+    public static void RecordTokens(int promptTokens, int completionTokens)
+    {
+        if (promptTokens <= 0 && completionTokens <= 0) return;
+        EnsureInitialized();
+        lock (_lock)
+        {
+            _today.PromptTokens += promptTokens;
+            _today.CompletionTokens += completionTokens;
+            _today.TotalTokens += promptTokens + completionTokens;
+        }
+        _ = SaveTodayAsync();
+    }
+
+    /// <summary>최근 <paramref name="days"/>일치 통계를 날짜 오름차순으로 반환합니다.</summary>
+    public static List<DailyUsageStats> GetStats(int days = 30)
+    {
+        EnsureInitialized();
+        var result = new List<DailyUsageStats>();
+        var today  = DateTime.Today;
+
+        for (int i = days - 1; i >= 0; i--)
+        {
+            var date    = today.AddDays(-i);
+            var dateStr = date.ToString("yyyy-MM-dd");
+
+            if (dateStr == _today.Date)
+            {
+                DailyUsageStats snapshot;
+                lock (_lock) { snapshot = CloneToday(); }
+                result.Add(snapshot);
+                continue;
+            }
+
+            var path = GetFilePath(dateStr);
+            if (File.Exists(path))
+            {
+                try
+                {
+                    var json = File.ReadAllText(path);
+                    var stat = JsonSerializer.Deserialize<DailyUsageStats>(json);
+                    if (stat != null) result.Add(stat);
+                    else result.Add(new DailyUsageStats { Date = dateStr });
+                }
+                catch { result.Add(new DailyUsageStats { Date = dateStr }); }
+            }
+            else
+            {
+                result.Add(new DailyUsageStats { Date = dateStr });
+            }
+        }
+
+        return result;
+    }
+
+    // ─── 내부 ────────────────────────────────────────────────────────────────
+
+    private static void EnsureInitialized()
+    {
+        if (_initialized) return;
+        lock (_lock)
+        {
+            if (_initialized) return;
+            try
+            {
+                Directory.CreateDirectory(_statsDir);
+                var todayStr = DateTime.Today.ToString("yyyy-MM-dd");
+                var path     = GetFilePath(todayStr);
+
+                if (File.Exists(path))
+                {
+                    var json = File.ReadAllText(path);
+                    var stat = JsonSerializer.Deserialize<DailyUsageStats>(json);
+                    _today = stat ?? new DailyUsageStats { Date = todayStr };
+                }
+                else
+                {
+                    _today = new DailyUsageStats { Date = todayStr };
+                }
+
+                PurgeOldFiles();
+            }
+            catch (Exception ex)
+            {
+                LogService.Warn($"통계 서비스 초기화 실패: {ex.Message}");
+                _today = new DailyUsageStats { Date = DateTime.Today.ToString("yyyy-MM-dd") };
+            }
+            _initialized = true;
+        }
+    }
+
+    private static void PurgeOldFiles()
+    {
+        try
+        {
+            var cutoff = DateTime.Today.AddDays(-RetentionDays);
+            foreach (var file in Directory.GetFiles(_statsDir, "????-??-??.json"))
+            {
+                var name = Path.GetFileNameWithoutExtension(file);
+                if (DateTime.TryParse(name, out var fileDate) && fileDate < cutoff)
+                    File.Delete(file);
+            }
+        }
+        catch (Exception ex)
+        {
+            LogService.Warn($"통계 파일 정리 실패: {ex.Message}");
+        }
+    }
+
+    private static async Task SaveTodayAsync()
+    {
+        try
+        {
+            DailyUsageStats snapshot;
+            lock (_lock) { snapshot = CloneToday(); }
+
+            var path = GetFilePath(snapshot.Date);
+            var json = JsonSerializer.Serialize(snapshot, new JsonSerializerOptions { WriteIndented = false });
+            await File.WriteAllTextAsync(path, json);
+        }
+        catch (Exception ex)
+        {
+            LogService.Warn($"통계 저장 실패: {ex.Message}");
+        }
+    }
+
+    private static DailyUsageStats CloneToday() => new()
+    {
+        Date             = _today.Date,
+        LauncherOpens    = _today.LauncherOpens,
+        ActiveSeconds    = _today.ActiveSeconds,
+        CommandUsage     = new Dictionary<string, int>(_today.CommandUsage),
+        ChatCounts       = new Dictionary<string, int>(_today.ChatCounts),
+        TotalTokens      = _today.TotalTokens,
+        PromptTokens     = _today.PromptTokens,
+        CompletionTokens = _today.CompletionTokens,
+    };
+
+    private static string GetFilePath(string dateStr)
+        => Path.Combine(_statsDir, $"{dateStr}.json");
+}