Expand the ` Application ` class with argument parsing and subcommands for PDF export and theme management. Integrate command handling logic.

src/epstein/application.py

@@ -1,7 +1,50 @@
+import argparse
+import sys
+
 class Application:
     def __init__(self):
-        pass
+        self.args = self.__setup_args
+
+    @property
+    def __setup_args(self):
+        parser = argparse.ArgumentParser(prog="epstein",
+                                         description='Test for PDF Export Module for pilgrim')
+
+        subparsers = parser.add_subparsers(dest="command",required=True)
+        print_parser = subparsers.add_parser("print", help="generate the PDF file ")
+        print_parser.add_argument("-t", "--theme", required=True, help="Define the theme to use.")
+        print_parser.set_defaults(func=self.handle_print)
+
+
+        theme_parser = subparsers.add_parser("theme", help="Manage the themes")
+        theme_subparsers = theme_parser.add_subparsers(dest="theme_action", help="Actions for the themes" ,  required=True)
+
+        theme_create_parser = theme_subparsers.add_parser("create", help="Create a new theme")
+        theme_create_parser.add_argument("-n", "--name", required=True, help="Name of the theme")
+        theme_create_parser.set_defaults(func=self.handle_theme_create)
+
+        theme_list_parser = theme_subparsers.add_parser("list", help="List all the themes")
+        theme_list_parser.set_defaults(func=self.handle_theme_list)
+
+        if len(sys.argv) == 2 and sys.argv[1] == 'theme':
+            theme_parser.print_help(sys.stderr)
+            sys.exit(1)
+
+        if len(sys.argv) == 1:
+            parser.print_help(sys.stderr)
+            sys.exit(1)
+
+        return parser.parse_args()
+
+    def handle_print(self):
+        print("handle print")
+
+    def handle_theme_create(self):
+        print("handle theme create")
+
+    def handle_theme_list(self):
+        print("handle theme list")
 
     def run(self):
-        pass
+        self.args.func()
     

src/epstein/command.py

@@ -1,3 +1,5 @@
+import argparse
+
 from epstein.application import Application
 
 def main():