import type { Context } from "grammy";
import { rm } from "node:fs/promises";
import { join } from "node:path";
import { eq } from "drizzle-orm";
import { whatsappAccounts } from "@cmbot/db";
import { db } from "../../db.js";
import { env } from "../../env.js";
import { sessionManager } from "../../whatsapp/session-manager.js";
import { writeAuditLog } from "../../audit.js";

export async function handleUnpair(ctx: Context): Promise<void> {
  const text = ctx.message?.text ?? "";
  const label = text
    .replace(/^\/unpair\s*/, "")
    .trim()
    .replace(/^["'“”‘’]|["'“”‘’]$/g, "");
  if (!label) {
    await ctx.reply('Usage: /unpair "Account Label"');
    return;
  }

  const operatorId = ctx.from?.id;
  if (!operatorId) return;

  const operatorRow = await db.query.operators.findFirst({
    where: (o, { eq }) => eq(o.telegramUserId, operatorId),
  });
  if (!operatorRow) return;

  const account = await db.query.whatsappAccounts.findFirst({
    where: (a, { eq, and }) => and(eq(a.operatorId, operatorRow.id), eq(a.label, label)),
  });
  if (!account) {
    await ctx.reply(`No account labelled "${label}".`);
    return;
  }

  await sessionManager.stop(account.id);
  await rm(join(env.SESSIONS_DIR, account.id), { recursive: true, force: true });

  await db
    .update(whatsappAccounts)
    .set({ status: "logged_out", phoneNumber: null })
    .where(eq(whatsappAccounts.id, account.id));

  await writeAuditLog(db, {
    operatorId: operatorRow.id,
    source: "telegram",
    action: "account.unpaired",
    targetType: "whatsapp_account",
    targetId: account.id,
    payload: { label },
  });

  await ctx.reply(`🗑 "${label}" unpaired. Session files deleted.`);
}