export async function handleInteraction(interaction: Interaction): Promise<void> {
  try {
    if (interaction.isAutocomplete()) {
      await handleAutocomplete(interaction);
      return;
    }

    if (interaction.isButton()) {
      const btn = interaction as ButtonInteraction;

      console.log("[interactions] interaction btnId:", btn.customId);
      if (btn.customId.startsWith("conflict_")) {
        console.log("[interactions] routing to conflict handler:", btn.customId);
        return await handleConflictButton(btn);
      }

      if (btn.customId.startsWith("impersonate_")) {
        return await handleImpersonateButton(btn);
      }

      if (btn.customId.startsWith("switch_after_reclaim:")) {
        return await handleSwitchAfterReclaim(btn);
      }

      if (btn.customId.startsWith("borrow_accept:")) {
        const [, ownerKey, requesterKey] = btn.customId.split(":");
        return await handleBorrowAcceptButton(btn, ownerKey, requesterKey);
      }

      if (btn.customId.startsWith("borrow_decline:")) {
        const [, ownerKey, requesterKey] = btn.customId.split(":");
        return await handleBorrowDeclineButton(btn, ownerKey, requesterKey);
      }

      if (btn.customId === "tg_score_submit") {
        return await handleScoreSubmitButton(btn);
      }

      if (btn.customId.startsWith("companion_switch:")) {
        return await handleSwitchAfterReclaim(btn);
      }

      return await handleButton(btn);
    }

    if (interaction.isModalSubmit()) {
      return await modals.handleModal(interaction);
    }

    if (interaction.isStringSelectMenu()) {
      const sel = interaction as StringSelectMenuInteraction;
      if (sel.customId.startsWith("score_slot_select:")) {
        const userKey = sel.customId.split(":")[1];
        const slot    = parseInt(sel.values[0], 10);
        await sel.showModal(modals.buildScoreModal(userKey, slot));
        return;
      }
    }

    if (interaction.isChatInputCommand()) {
      const cmd = interaction as ChatInputCommandInteraction;
      if (cmd.commandName === "tg")        await handleTgCommand(cmd);
      if (cmd.commandName === "tg-config") await handleTgConfigCommand(cmd);
      if (cmd.commandName === "tg-admin")  await handleTgAdminCommand(cmd);
    }
  } catch (err) {
    console.error("Interaction error:", err);
    try {
      const msg = { content: "❌ An error occurred.", ephemeral: true };
      if ((interaction as any).replied || (interaction as any).deferred) {
        await (interaction as any).followUp(msg);
      } else {
        await (interaction as any).reply(msg);
      }
    } catch {}
  }
}