diff --git a/main.py b/main.py
index 6d6a203..e422f2a 100644
--- a/main.py
+++ b/main.py
@@ -1,11 +1,27 @@
 import argparse
+import importlib
+import pathlib
+import pytest
+
+import util.reader as reader
 
 FIRST_EVENT = 2015
 LAST_EVENT = 2015
 
-def main(day: int, event: int, test: bool = False) -> str:
-    print("Called main...")
-    return f"Day {day} of event {event} processing [Test: {test}]"
+def main(day: int, event: int, part: int, output_format: str, test: bool = False) -> str:
+    if test:
+        pytest_args = [f"tests/{event}/test_day{day}.py"]
+        exit_code = pytest.main(pytest_args)
+        return f"Pytest exited with code {exit_code}"
+    else:
+        solution = importlib.import_module(f"solution.ev{event}")
+        data_path = pathlib.Path(f"input/{event}/Day{day}")
+        data = reader.parse_datafile(data_file=data_path, output_format=output_format)
+        func_name = f"{day}"
+        if func_name in solution.function_map:
+            return solution.function_map[func_name](data=data, part=part)
+        else:
+            return f"Function {func_name} not found"
 
 
 if __name__ == "__main__":
@@ -26,6 +42,18 @@ if __name__ == "__main__":
         type=int,
         choices=range(FIRST_EVENT, LAST_EVENT + 1)
     )
+    parser.add_argument(
+        "-f",
+        "--format",
+        type=str,
+        choices=['string', 'list', 'int_list'],
+        default='string',
+        required=False,
+    )
     args = parser.parse_args()
 
-    print(main(day=args.day, event=args.event, test=args.test))
+    if not args.test:
+        print(f"Part 1: {main(day=args.day, event=args.event, part=1, output_format=args.format, test=args.test)}")
+        print(f"Part 2: {main(day=args.day, event=args.event, part=2, output_format=args.format, test=args.test)}")
+    else:
+        print(f"{main(day=args.day, event=args.event, part=0, output_format=args.format, test=args.test)}")