import { spawn, ChildProcess } from "child_process";
import { ServerStartCommand } from "server-manager-shared";
import { SERVER_SCRIPT_PATH, SERVER_WORKING_DIRECTORY } from "./config";
import { getLogger } from "./logger";

const logger = getLogger("ProcessManager");


interface ServerProcess {


    id:string;

    name:string;

    port:number;

    queryPort:number;

    process:ChildProcess;

    started:number;

    alive:boolean;


    players:number;

    maxPlayers:number;


}



export class ProcessManager {



    private processes =
        new Map<string, ServerProcess>();






    startServer(data: ServerStartCommand){



        logger.debug(
            "Starte Game Server:",
            data.name
        );




        const args = [

            `-Port=${data.port}`,

            `-QueryPort=${data.queryPort}`,

            `-ServerName=${data.name}`

        ];





        const process = spawn(
            SERVER_SCRIPT_PATH,
            args,
            {
                cwd: SERVER_WORKING_DIRECTORY,
                stdio:"pipe",
                detached:true
            }
        );







        process.stdout?.on(
            "data",
            data=>{


                logger.debug(
                    `[${data.name}]`,
                    data.toString()
                );


            }

        );





        process.stderr?.on(

            "data",

            data=>{


                logger.error(

                    "SERVER ERROR:",
                    data.toString()

                );


            }

        );







        process.on("exit", code=>{


            const server =
                this.processes.get(data.serverId);



            if(server){


                logger.info(
                    "Server beendet:",
                    server.name,
                    code
                );


                this.processes.delete(
                    data.serverId
                );


            }


        });








        this.processes.set(

            data.serverId,

            {

                id:data.serverId,

                name:data.name,

                port:data.port,

                queryPort:data.queryPort,

                process,

                started:Date.now(),

                alive:true,


                players:0,

                maxPlayers:0

            }

        );






        logger.info(
            "Server gestartet:",
            {
                id:data.serverId,
                pid:process.pid
            }
        );



    }









    stopServer(id:string){



        const server =
            this.processes.get(id);




        if(!server){


            logger.warn(

                "Server nicht gefunden:",

                id

            );


            return;

        }






        logger.debug(
            "Stoppe Server:",
            server.name
        );





        process.kill(
            -server.process.pid!,
            "SIGTERM"
        );





    }








    getServers(){


        return Array.from(

            this.processes.values()

        );


    }

    getStatus(){


        return Array.from(
            this.processes.values()
        ).map(server => ({


            id:
                server.id,


            name:
                server.name,


            port:
                server.port,


            queryPort:
                server.queryPort,


            pid:
                server.process.pid,


            alive:
                server.alive,


            players:
                server.players,


            maxPlayers:
                server.maxPlayers,


            started:
                server.started


        }));


    }




}