import http from 'node:http';
import {appendFileSync,writeFileSync} from 'node:fs';

const port=Number(process.env.PORT||3000);
const token=process.env.ALE_BRIDGE_TOKEN||'ci-bridge-token';
const file=process.env.CAPTURE_FILE||'/tmp/ale-capture.jsonl';
let probeSent=false;
writeFileSync(file,'');

function log(kind,payload){
 appendFileSync(file,JSON.stringify({at:new Date().toISOString(),kind,payload})+'\n');
}

function authorized(req){
 return req.headers.authorization===`Bearer ${token}`;
}

function read(req){
 return new Promise((resolve,reject)=>{
  let body='';
  req.setEncoding('utf8');
  req.on('data',c=>{body+=c;if(body.length>100000){reject(new Error('too large'));req.destroy();}});
  req.on('end',()=>resolve(body));
  req.on('error',reject);
 });
}

const probe=`local __command_id="ci-probe"
local function __stringify(v)
 if v==nil then return "nil" end
 return tostring(v)
end
local __ok,__result=pcall(function()
 local core=tostring(GetCoreName())
 local version=tostring(GetCoreVersion())
 local lua=tostring(GetLuaEngine())
 local players=tostring(GetPlayerCount())
 local pb="unknown"
 if type(GetRandomPlayerbotMgr)=="function" then
  local ok,mgr=pcall(GetRandomPlayerbotMgr)
  pb=ok and (mgr and "available" or "nil") or "error"
 end
 return "core="..core.."|version="..version.."|lua="..lua.."|players="..players.."|playerbots="..pb
end)
AzerothAIComplete(__command_id,__ok,__stringify(__result))
`;

const server=http.createServer(async(req,res)=>{
 try{
  if(req.url==='/health'){
   res.writeHead(200,{'content-type':'application/json'});
   return res.end(JSON.stringify({ok:true,probeSent}));
  }
  if(!authorized(req)){
   res.writeHead(401);
   return res.end('unauthorized');
  }
  if(req.method==='GET'&&req.url==='/api/bridge/ale/poll'){
   log('poll',{probeSent});
   if(!probeSent){
    probeSent=true;
    res.writeHead(200,{'content-type':'text/plain; charset=utf-8','x-azerothai-command':'ci-probe'});
    return res.end(probe);
   }
   res.writeHead(204);
   return res.end();
  }
  if(req.method==='POST'&&req.url==='/api/bridge/ale/event'){
   const body=await read(req);
   let parsed;try{parsed=JSON.parse(body);}catch{parsed={raw:body};}
   log('event',parsed);
   res.writeHead(200,{'content-type':'application/json'});
   return res.end('{"ok":true}');
  }
  if(req.method==='POST'&&req.url==='/api/bridge/ale/result'){
   const body=await read(req);
   let parsed;try{parsed=JSON.parse(body);}catch{parsed={raw:body};}
   log('result',parsed);
   res.writeHead(200,{'content-type':'application/json'});
   return res.end('{"ok":true}');
  }
  res.writeHead(404);res.end('not found');
 }catch(e){
  log('server-error',{message:e instanceof Error?e.message:String(e)});
  res.writeHead(500);res.end('error');
 }
});

server.listen(port,'0.0.0.0',()=>console.log(`ALE capture server listening on ${port}`));