cli

src/tea3/cli.py

@@ -0,0 +1,44 @@
+from tea3.pretty_print import pretty_print
+from tea3.tea3model import Tea3Model
+
+
+def prompt_int(message: str, lo: int, hi: int) -> int:
+    while True:
+        raw = input(message).strip()
+        try:
+            value = int(raw)
+        except ValueError:
+            print("Please enter a whole number.")
+            continue
+        if lo <= value <= hi:
+            return value
+        print(f"Value must be between {lo} and {hi} (inclusive).")
+
+
+def main() -> None:
+    print("=" * 50)
+    print(" Tea3 Model ")
+    print("=" * 50)
+
+    steps = prompt_int("\nHow many steps do you want to run? (1–100): ", 1, 100)
+
+    print("\nR registers are indexed 0–7; bits within each register are 0–7.")
+    reg = prompt_int("Which R register do you want to inspect? (0–7): ", 0, 7)
+    bit = prompt_int("Which bit of that register?           (0–7): ", 0, 7)
+
+    print(f"\nRunning {steps} step(s), watching R[{reg}][{bit}]")
+    print("-" * 50)
+
+    model = Tea3Model(max_steps=steps)
+
+    for i in range(steps):
+        model.step()
+        poly = model.R_bits[reg][bit]
+        print(f"\n[Step {i}]  R_bits[{reg}][{bit}] =")
+        print(pretty_print(poly))
+
+    print("\n" + "=" * 50)
+    print("Done.")
+
+
+main()