import type { Context } from "grammy";
import { db } from "../../db.js";

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

  const groups = await db.query.whatsappGroups.findMany({
    where: (g, { eq }) => eq(g.accountId, account.id),
    orderBy: (g, { asc }) => [asc(g.name)],
  });

  if (groups.length === 0) {
    await ctx.reply(`No groups synced for "${label}" yet.`);
    return;
  }

  const lines = groups.slice(0, 50).map((g) => `• ${g.name} (${g.participantCount})`);
  const overflow = groups.length > 50 ? `\n…and ${groups.length - 50} more` : "";
  await ctx.reply(`👥 Groups in "${label}":\n${lines.join("\n")}${overflow}`);
}