import subprocess
from typing import Final

import diceplayer.dice.dice_input as dice_input

from pathlib import Path

from diceplayer.config import DiceConfig


DICE_FLAG_LINE: Final[int] = -2
DICE_END_FLAG: Final[str] = "End of simulation"


class DiceWrapper:
    def __init__(self, dice_config: DiceConfig, working_directory: Path):
        self.dice_config = dice_config
        self.working_directory = working_directory

    def run(self, dice_config: dice_input.BaseConfig) -> None:
        input_path = dice_config.write(self.working_directory)
        output_path = input_path.parent / (input_path.name + ".out")

        with open(output_path, "w") as outfile, open(input_path, "r") as infile:
            exit_status = subprocess.call(
                self.dice_config.progname, stdin=infile, stdout=outfile
            )

        if exit_status != 0:
            raise RuntimeError(f"Dice simulation failed with exit status {exit_status}")

        with open(output_path, "r") as outfile:
            line = outfile.readlines()[DICE_FLAG_LINE]
            if line.strip() == DICE_END_FLAG:
                return

        raise RuntimeError(f"Dice simulation failed with exit status {exit_status}")

    def extract_results(self) -> dict:
        return {}