import subprocess
import shlex


class MinecraftServerManager:
    allowed_properties: list[str] = ["difficulty", "gamemode", "force-gamemode", "hardcore", "generate-structures",
                                     "motd", "pvp", "online-mode", "max-players"]

    def __init__(self):
        self.servers: dict = {}
        self.servers_count: int = 0

    def start_server(self, server_directory: str, port: int,
                     java_executable='java', jar_file='server.jar', memory_size='2048M') -> int or None:

        if port in self.servers:
            return None

        command = f"{java_executable} -Xmx{memory_size} -Xms{memory_size} -jar {jar_file} > /dev/null"
        process = subprocess.Popen(shlex.split(command), cwd=server_directory, stdin=subprocess.PIPE)

        self.servers_count = len(self.servers) + 1
        self.servers[port] = {
            'process': process,
            'directory': server_directory,
            'port': port
        }
        return port

    def execute_server_command(self, port, command) -> bool:
        if port not in self.servers:
            return False
        process = self.servers[port]['process']
        process.stdin.write(command.encode('utf-8') + b'\n')
        process.stdin.flush()
        return True

    def stop_server(self, port: int) -> bool:
        if port not in self.servers:
            return False
        process = self.servers[port]['process']
        process.communicate(input=b"stop\n")
        del self.servers[port]
        return True

    def stop_server_forcefully(self, server_id) -> bool:
        if server_id not in self.servers:
            return False
        process = self.servers[server_id]['process']
        process.terminate()
        del self.servers[server_id]
        return True

    def get_servers(self):
        return self.servers.values()

    def get_server_id_by_port(self, port):
        for server_id, server_info in self.servers.items():
            if server_info['port'] == port:
                return server_id
        return None


if __name__ == "__main__":
    pass