Add logging with .env support

.gitignore

@@ -5,3 +5,4 @@ dist/
 *.pyc
 __pycache__/
 *.spec
+*.log

src/main.py

@@ -1,4 +1,5 @@
 import csv
+import logging
 import os
 import tkinter as tk
 from tkinter import messagebox, ttk
@@ -7,6 +8,9 @@ import matplotlib.pyplot as plt
 import pandas as pd
 from matplotlib.backends.backend_tkagg import FigureCanvasTkAgg
 
+import sys
+from dotenv import load_dotenv
+
 
 class MedTrackerApp:
     def __init__(self, root):
@@ -17,7 +21,24 @@ class MedTrackerApp:
         # self.root.iconbitmap("app_icon.ico")
         # self.root.geometry("800x600")
 
+        if len(sys.argv) > 1:
+            script_name = sys.argv[0]
+            first_argument = sys.argv[1]
+
+            if logger.level == logging.DEBUG:
+                logger.debug(f"Script name: {script_name}")
+                logger.debug(f"First argument: {first_argument}")
+
+            if os.path.exists(first_argument):
+                self.filename = first_argument
+                logger.info(f"Using data file: {first_argument}")
+            else:
                 self.filename = "thechart_data.csv"
+                logger.warning(
+                    f"Data file {first_argument} does not exist."
+                    f" Using default file: {self.filename}"
+                )
+
         self.initialize_csv()
 
         main_frame = ttk.Frame(self.root, padding="10")
@@ -489,6 +510,7 @@ class MedTrackerApp:
     def update_graph(self, df: pd.DataFrame) -> None:
         self.ax.clear()
         if not df.empty:
+            df["date"] = pd.to_datetime(df["date"])
             df = df.sort_values(by="date")
             df.set_index(keys="date", inplace=True)
             self.ax.plot(
@@ -515,7 +537,31 @@ class MedTrackerApp:
         self.canvas.draw()
 
 
+def setup_logging() -> logging.Logger:
+    load_dotenv()
+    log_file = os.getenv("LOG_FILE", "/tmp/thechart.log")
+    if not os.path.exists(os.path.dirname(log_file)):
+        os.makedirs(os.path.dirname(log_file), exist_ok=True)
+
+    log_level = os.getenv("LOG_LEVEL", "INFO").upper()
+    if log_level not in ["DEBUG", "INFO", "WARNING", "ERROR", "CRITICAL"]:
+        log_level = "DEBUG"
+
+    logging.basicConfig(
+        level=getattr(logging, log_level),
+        format="%(asctime)s - %(levelname)s - %(message)s",
+        handlers=[
+            logging.FileHandler(log_file),
+            logging.StreamHandler(sys.stdout),
+        ],
+    )
+    logger = logging.getLogger()
+
+    return logger
+
+
 if __name__ == "__main__":
+    logger = setup_logging()
     root = tk.Tk()
     app = MedTrackerApp(root)
     root.mainloop()