From 987d4023b0e79966b3b1aebf37039a90f9312518 Mon Sep 17 00:00:00 2001
From: Jonas Lima de Amorim <dev.amorim@outlook.com>
Date: Thu, 23 Jul 2026 18:45:45 -0300
Subject: [PATCH] feat(summary): add --output json/csv

---
 README.md                                     |  4 ++
 Timetracker.Console/Options/SummaryOptions.cs |  3 ++
 Timetracker.Console/Program.cs                | 50 +++++++++++++++----
 3 files changed, 48 insertions(+), 9 deletions(-)

diff --git a/README.md b/README.md
index ac59086..2d3bc43 100644
--- a/README.md
+++ b/README.md
@@ -211,6 +211,7 @@ Accepts the same period options as `list`.
 | `--to` | `-t` | no | End date (default: today) |
 | `--period` | `-p` | no | Specific month in `YYYY/MM` format |
 | `--work-item` | `-w` | no | Filter by Work Item ID |
+| `--output` | `-o` | no | Output format: `json` or `csv`. Defaults to a table |
 | `--today` | | no | Today |
 | `--yesterday` | | no | Yesterday |
 | `--week` | | no | Current week (Mon–Sun) |
@@ -222,6 +223,9 @@ Accepts the same period options as `list`.
 # Daily totals for the current week
 timetracker summary --week
 
+# Export the monthly breakdown as CSV
+timetracker summary --month --output csv > breakdown.csv
+
 # Current month
 timetracker summary --month
 
diff --git a/Timetracker.Console/Options/SummaryOptions.cs b/Timetracker.Console/Options/SummaryOptions.cs
index 5f13dce..f7208fd 100644
--- a/Timetracker.Console/Options/SummaryOptions.cs
+++ b/Timetracker.Console/Options/SummaryOptions.cs
@@ -34,4 +34,7 @@ public class SummaryOptions : IPeriodOptions
 
     [Option('w', "work-item", Required = false, HelpText = "Filter entries by Work Item ID.")]
     public int? WorkItemId { get; set; }
+
+    [Option('o', "output", Required = false, HelpText = "Output format: 'json' or 'csv'. Defaults to a table.")]
+    public string Output { get; set; }
 }
diff --git a/Timetracker.Console/Program.cs b/Timetracker.Console/Program.cs
index 4e7555b..6c83b9d 100644
--- a/Timetracker.Console/Program.cs
+++ b/Timetracker.Console/Program.cs
@@ -382,21 +382,53 @@ static async Task<int> SummaryAction(SummaryOptions opts, CancellationToken canc
 
     var totalHours = Math.Round(workLogs.Sum(x => x.Length) / 3600m, 2);
 
+    var days = workLogs
+        .GroupBy(x => x.TimeStamp.Date)
+        .OrderBy(g => g.Key)
+        .Select(g => new
+        {
+            Date = g.Key,
+            Hours = Math.Round(g.Sum(x => x.Length) / 3600m, 2),
+            Count = g.Count()
+        })
+        .ToList();
+
+    if (!string.IsNullOrEmpty(opts.Output))
+    {
+        switch (opts.Output.ToLowerInvariant())
+        {
+            case "json":
+                var payload = days.Select(d => new
+                {
+                    date = d.Date.ToString("yyyy/MM/dd"),
+                    weekday = d.Date.DayOfWeek.ToString(),
+                    hours = d.Hours,
+                    entries = d.Count
+                });
+                Console.WriteLine(JsonConvert.SerializeObject(payload, Formatting.Indented));
+                return 0;
+            case "csv":
+                Console.WriteLine("date,weekday,hours,entries");
+                foreach (var d in days)
+                    Console.WriteLine($"{d.Date:yyyy/MM/dd},{d.Date.DayOfWeek},{d.Hours},{d.Count}");
+                return 0;
+            default:
+                ConsoleHelper.WriteError($"Unknown output format '{opts.Output}'. Use 'json' or 'csv'.");
+                return 1;
+        }
+    }
+
     TableHelper.WriteMuted($"Summary from {from:yyyy/MM/dd} to {to:yyyy/MM/dd}:");
     Console.WriteLine();
 
     var table = TableHelper.NewTable("DATE", "WEEKDAY", "HOURS", "ENTRIES");
 
-    foreach (var day in workLogs.GroupBy(x => x.TimeStamp.Date).OrderBy(g => g.Key))
-    {
-        var dayHours = Math.Round(day.Sum(x => x.Length) / 3600m, 2);
-        var count = day.Count();
+    foreach (var d in days)
         table.AddRow(
-            $"{day.Key:yyyy/MM/dd}",
-            Markup.Escape(day.Key.DayOfWeek.ToString()),
-            $"{dayHours}h",
-            count.ToString());
-    }
+            $"{d.Date:yyyy/MM/dd}",
+            Markup.Escape(d.Date.DayOfWeek.ToString()),
+            $"{d.Hours}h",
+            d.Count.ToString());
 
     AnsiConsole.Write(table);