from tea3.pretty_print import pretty_print
from tea3.tea3model import Tea3Model
from tea3.variable_search import run_exhaustive


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 number.")
            continue
        if lo <= value <= hi:
            return value
        print(f"Value must be between {lo} and {hi} (inclusive).")


def prompt_choice(message: str, choices: set[int]) -> int:
    choices_str = ", ".join(map(str, sorted(choices)))
    while True:
        raw = input(message).strip()
        try:
            value = int(raw)
        except ValueError:
            print("Please enter a number.")
            continue
        if value in choices:
            return value
        print(f"Value must be one of: {choices_str}")


def run_classic_cli():
    print("\nR registers are indexed 0–7; bits within each register are 0–7.")
    print("Enter -1 to print all registers, or all bits.")

    steps = prompt_int("How many steps do you want to run? (1–100): ", 1, 100)
    reg = prompt_int("Which R register do you want to inspect? (-1 or 0–7): ", -1, 7)
    bit = prompt_int("Which bit of that register?              (-1 or 0–7): ", -1, 7)

    print("-" * 50)

    model = Tea3Model()

    for i in range(steps):
        model.step()
        print(f"\n[Step {i + 1}]")

        regs = range(8) if reg == -1 else [reg]
        bits = range(8) if bit == -1 else [bit]

        for r in regs:
            for b in bits:
                poly = model.R_bits[r][b]
                print(f"R_bits[{r}][{b}] =")
                print(pretty_print(poly))
                print()

    print("\n" + "=" * 50)
    print("Done.")

def run_exhaustive_cli():
    print("\nR registers are indexed 0–7; bits within each register are 0–7.")
    print("Enter -1 to print all bits in the chosen register.")

    steps = prompt_int("How many steps? (1–100): ", 1, 100)
    target_reg = prompt_int("Target register (0–7): ", 0, 7)
    target_bit = prompt_int("Target bit (-1 or 0–7): ", -1, 7)

    print("-" * 50)
    run_exhaustive(steps, target_reg, target_bit)

    print("\n" + "=" * 50)
    print("Done.")



def main():
    print("=" * 50)
    print(" Tea3 Model ")
    print("=" * 50)

    print("\nChoose a mode:")
    print("  1) Classic inspection")
    print("  2) Exhaustive variable-change search")

    mode = prompt_choice("Your choice (1 or 2): ", {1, 2})

    if mode == 1:
        run_classic_cli()
    else:
        run_exhaustive_cli()


main()