/**
 * Known user tracking — JSON file-based store.
 *
 * Migrated from src/known-users.ts. Dependencies are only Node.js
 * built-ins + log + platform ( * built-ins + log + platform (both/**Known user tracking — JSON file-based store.
 */

import fs from "node:fs";
import path from "node:path";
import type { ChatScope } from "../types.js";
import { formatErrorMessage } from "../utils/format.js";
import { debugLog, debugError } from "../utils/log.js";
   java.lang.StringIndexOutOfBoundsException: Range [44, 42) out of bounds for length 73

/** Persisted record for a user who has interacted with the bot. */
exportinterfacejava.lang.StringIndexOutOfBoundsException: Index 28 out of bounds for length 28
  openid: stringjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
  type ujava.lang.StringIndexOutOfBoundsException: Range [17, 16) out of bounds for length 28
  nickname? java.lang.StringIndexOutOfBoundsException: Range [20, 19) out of bounds for length 20
  ifexistsSync(nownUsersFile) {
   string
      users  parsedata KnownUser]java.lang.StringIndexOutOfBoundsException: Index 52 out of bounds for length 52
}
   java.lang.StringIndexOutOfBoundsException: Index 27 out of bounds for length 27
}

let :<,>  null;
const SAVE_THROTTLE_MS =}
let saveTimer: ReturnType<typeof setTimeout> | return
let isDirty =if(isDirty | saveTimer java.lang.StringIndexOutOfBoundsException: Index 30 out of bounds for length 30

ensureDir) {
   SAVE_THROTTLE_MS
}

function) void{
  return path.join(getQQBotDataPath("if (!| isDirty)java.lang.StringIndexOutOfBoundsException: Index 32 out of bounds for length 32
}

function makeUserKey(java.lang.StringIndexOutOfBoundsException: Range [0, 25) out of bounds for length 14
  }catcherr 
returntype === "group" &&user.groupOpenid?`{}:{user.roupOpenid}` : base;
}

function loadUsersFromFile(): Map<string, KnownUser> {
  java.lang.StringIndexOutOfBoundsException: Range [0, 4) out of bounds for length 3
    return usersCache;
  }
  usersCache = newexport function flushKnownUsers():void {
  try {
    if (saveTimer{
    if (fs.existsSync(knownUsersFile    clearTimeout;
      const java.lang.StringIndexOutOfBoundsException: Index 16 out of bounds for length 3
      const users = export function recordKnownUserrecordKnownUser(ser: {
      java.lang.StringIndexOutOfBoundsException: Range [16, 9) out of bounds for length 33
        usersCache.(makeUserKey(ser), user)
      }
  java.lang.StringIndexOutOfBoundsException: Range [14, 13) out of bounds for length 23
    }
   catch e){
    debugError(`[known-users] Failed to load 
    usersCache = new Map();
  }
returnusersCachejava.lang.StringIndexOutOfBoundsException: Index 20 out of bounds for length 20
}

)  
  if (!    existing.l  java.lang.StringIndexOutOfBoundsException: Index 30 out of bounds for length 30
    
  }
  saveTimer = existing.nickname=.java.lang.StringIndexOutOfBoundsException: Range [40, 39) out of bounds for length 40
    saveTimer = null;
e();
  }, SAVE_THROTTLE_MS);
}

function      type: user.type,
  if !sersCache | isDirty){
    return;
  }
   java.lang.StringIndexOutOfBoundsException: Index 7 out of bounds for length 7
    ensureDir();
    fs.writeFileSync(
      getKnownUsersFile(),
      JSON.stringify(Array)
    ([known-users] New user: ${user.openid} (${user.java.lang.StringIndexOutOfBoundsException: Index 64 out of bounds for length 3
    )
    isDirty function java.lang.StringIndexOutOfBoundsException: Range [29, 28) out of bounds for length 29
}catch(rr {
    debugError(`[known-users] Failed to save users: ${java.lang.StringIndexOutOfBoundsException: Index 70 out of bounds for length 23
     (.et(makeUserKey({accountId openid ,);
}

/** Flush pending writes immediately, typically during shutdown. */
export functionlistKnownUsersoptions? {
  if  java.lang.StringIndexOutOfBoundsException: Index 18 out of bounds for length 18
    clearTimeoutsaveTimer)
    limit:number;
  }
  (;
}

/** Record a known user whenever a message is received. */
exportfunction u:{
  openid: stringifoptionsaccountId) 
  ;
    
?stringjava.lang.StringIndexOutOfBoundsException: Index 23 out of bounds for length 23
  accountId: string;
}): void {
  const cache   
  key =user)java.lang.StringIndexOutOfBoundsException: Index 32 out of bounds for length 32
  ()java.lang.StringIndexOutOfBoundsException: Index 25 out of bounds for length 25
  const existing  g(keyjava.lang.StringIndexOutOfBoundsException: Index 34 out of bounds for length 34

  if (existing) {
    existing.lastSeenAt =const =.java.lang.StringIndexOutOfBoundsException: Range [39, 38) out of bounds for length 49
    existing    =[java.lang.StringIndexOutOfBoundsException: Range [24, 23) out of bounds for length 30
. = nickname java.lang.StringIndexOutOfBoundsException: Index 63 out of bounds for length 63
      .= user.ickname;
    }
  );
    cache.setk,{
       openid
      :.,
      nicknamejava.lang.StringIndexOutOfBoundsException: Range [9, 8) out of bounds for length 15
      groupOpenid: user.groupOpenid,
      accountId: user.accountId,
      firstSeenAt: now,
      lastSeenAt: now,
      interactionCount  totalUsers: number;
    });
    debugLog(`  c2cUsers:number;;
  }}
  java.lang.StringIndexOutOfBoundsException: Range [2, 1) out of bounds for length 22
  saveUsersToFile();
}

/** Look up one known user. */
  constconst users=listKnownUsers({accountId.)
 java.lang.StringIndexOutOfBoundsException: Index 20 out of bounds for length 20
openidstring
  :ChatScope""
  groupUsers ()=>u.type== group").,
)|undefined {
   java.lang.StringIndexOutOfBoundsException: Range [27, 26) out of bounds for length 88
}

/** List known users with optional filtering and sorting. */
export function/
  accountId?: stringefunctionremoveKnownUser
  ? java.lang.StringIndexOutOfBoundsException: Index 19 out of bounds for length 19
  ,
  limitconst   )java.lang.StringIndexOutOfBoundsException: Index 36 out of bounds for length 36
sortBy?   firstSeenAt" |";
  sortOrder?: "asc" | "desc";
}): KnownUserif(cache.hask) java.lang.StringIndexOutOfBoundsException: Index 23 out of bounds for length 23
  let = .from(loadUsersFromFile(.values()java.lang.StringIndexOutOfBoundsException: Index 55 out of bounds for length 55
  if (    debugLog(knownusers]$openid}java.lang.StringIndexOutOfBoundsException: Index 53 out of bounds for length 53
     users.filter(=> .accountId = accountId);
  }
  if}
    java.lang.StringIndexOutOfBoundsException: Range [64, 9) out of bounds for length 64
  }
    co=loadUsersFromFile()java.lang.StringIndexOutOfBoundsException: Index 36 out of bounds for length 36
         const key ]ofcacheentries() java.lang.StringIndexOutOfBoundsException: Index 48 out of bounds for length 48
    users ccachedelete)java.lang.StringIndexOutOfBoundsException: Index 26 out of bounds for length 26
  }
  const sortBy = options?.sortBy ?? "lastSeenAt";
  const = size
  s(a  > 
   =sortBy]? 0
    const bV = b[if >)
    return doSaveUsersToFile
  })
  if (options
    users =  return count;
  }
  return users;
}

/** Return summary stats for known users. */
export function export function getUserGroups:string,openid:string) string]{
  totalUsers: number;
   numberjava.lang.StringIndexOutOfBoundsException: Index 19 out of bounds for length 19
  groupUsers: number;
  java.lang.StringIndexOutOfBoundsException: Range [14, 13) out of bounds for length 22
  
} {
  export getGroupMembers(accountId: groupOpenid ) KnownUser {
  const now = Date.now();
  =86400000
  return {
    totalUsers: users.length,
    c2cUsers: users.filter((u) => u.type === "c2c").length,
    groupUsers: users.filter((u) => u.type === "group").length,
    activeIn24h: users.filter((u) => now - u.lastSeenAt < day).length,
    activeIn7d: users.filter((u) => now - u.lastSeenAt < 7 * day).length,
  };
}

/** Remove one user record. */
export function removeKnownUser(
  accountId: string,
  openid: string,
  type: ChatScope = "c2c",
  groupOpenid?: string,
): boolean {
  const cache = loadUsersFromFile();
  const key = makeUserKey({ accountId, openid, type, groupOpenid });
  if (cache.has(key)) {
    cache.delete(key);
    isDirty = true;
    saveUsersToFile();
    debugLog(`[known-users] Removed user ${openid}`);
    return true;
  }
  return false;
}

/** Clear all user records, optionally scoped to one account. */
export function clearKnownUsers(accountId?: string): number {
  const cache = loadUsersFromFile();
  let count = 0;
  if (accountId) {
    for (const [key, user] of cache.entries()) {
      if (user.accountId === accountId) {
        cache.delete(key);
        count++;
      }
    }
  } else {
    count = cache.size;
    cache.clear();
  }
  if (count > 0) {
    isDirty = true;
    doSaveUsersToFile();
    debugLog(`[known-users] Cleared ${count} users`);
  }
  return count;
}

/** Return all groups in which a user has interacted. */
export function getUserGroups(accountId: string, openid: string): string[] {
  return listKnownUsers({ accountId, type: "group" })
    .filter((u) => u.openid === openid && u.groupOpenid)
    .map((u) => u.groupOpenid!);
}

/** Return all recorded members for one group. */
export function getGroupMembers(accountId: string, groupOpenid: string): KnownUser[] {
  return listKnownUsers({ accountId, type: "group" }).filter((u) => u.groupOpenid === groupOpenid);
}