import { rm } from "node:fs/promises";
import { join } from "node:path";
import { db } from "../db.js";
import { env } from "../env.js";
import { sessionManager } from "../whatsapp/session-manager.js";
import { writeAuditLog } from "../audit.js";
import { pgNotifyWeb } from "./notify.js";
import { logger } from "../logger.js";

/**
 * Unpair handler: stop the live Baileys session and remove session files.
 * The web's unpair action deletes the account row before notifying us,
 * so we expect the row to be gone by the time we run. Audit log uses a
 * null operator since the row is no longer queryable.
 */
export async function handleUnpair(accountId: string): Promise<void> {
  await sessionManager.stop(accountId);
  await rm(join(env.SESSIONS_DIR, accountId), { recursive: true, force: true });
  try {
    await writeAuditLog(db, {
      operatorId: null,
      source: "web",
      action: "account.unpaired",
      targetType: "whatsapp_account",
      targetId: accountId,
      payload: {},
    });
  } catch (err) {
    logger.warn({ err, accountId }, "unpair: audit log failed (non-fatal)");
  }
  await pgNotifyWeb({ type: "session.disconnected", accountId });
}