import { env } from 'cloudflare:workers';
import { recentAleCommands,recentAleEvents } from '@/core/ale-store';

type SafeWorldEvent={
 id:number;
 at:string;
 kind:string;
 name?:string;
 zone?:string;
 level?:number;
 isBot?:boolean;
};

function safeEvent(event:{id:number;at:string;kind:string;payload:unknown}):SafeWorldEvent{
 const payload=(event.payload&&typeof event.payload==='object'?event.payload:{}) as Record<string,unknown>;
 const out:SafeWorldEvent={id:event.id,at:event.at,kind:event.kind};
 if(typeof payload.name==='string')out.name=payload.name.slice(0,40);
 const zone=typeof payload.zoneName==='string'?payload.zoneName:typeof payload.zone==='string'?payload.zone:undefined;
 if(zone)out.zone=zone.slice(0,120);
 if(typeof payload.level==='number'&&Number.isFinite(payload.level))out.level=payload.level;
 if(typeof payload.isBot==='boolean')out.isBot=payload.isBot;
 return out;
}

export async function GET(){
 try{
  const [events,commands]=await Promise.all([
   recentAleEvents(env.DB!,80),
   recentAleCommands(env.DB!,30)
  ]);
  const newest=events[0];
  const now=Date.now();
  const lastEventAt=newest?.at??null;
  const ageMs=lastEventAt?Math.max(0,now-Date.parse(lastEventAt)):null;
  const recentWindow=events.filter(e=>now-Date.parse(e.at)<5*60_000);
  return Response.json({
   ok:true,
   ale:{
    lastEventAt,
    ageMs,
    activeRecently:recentWindow.length>0,
    bridgeReady:events.some(e=>e.kind==='bridge.ready')
   },
   playerbots:{
    observedBots:new Set(recentWindow.flatMap(e=>{
     const p=(e.payload&&typeof e.payload==='object'?e.payload:{}) as Record<string,unknown>;
     if(p.isBot!==true)return [];
     if(typeof p.characterGuid==='number')return [`guid:${p.characterGuid}`];
     if(typeof p.name==='string'&&p.name.trim())return [`name:${p.name.toLowerCase()}`];
     return [];
    })).size
   },
   commands:{
    pending:commands.filter(c=>c.status==='pending').length,
    dispatched:commands.filter(c=>c.status==='dispatched').length,
    completed:commands.filter(c=>c.status==='completed').length,
    failed:commands.filter(c=>c.status==='failed').length
   },
   events:events.slice(0,30).map(safeEvent)
  },{headers:{'Cache-Control':'no-store'}});
 }catch{
  return Response.json({
   ok:false,
   ale:{lastEventAt:null,ageMs:null,activeRecently:false,bridgeReady:false},
   playerbots:{observedBots:0},
   commands:{pending:0,dispatched:0,completed:0,failed:0},
   events:[]
  },{status:200,headers:{'Cache-Control':'no-store'}});
 }
}