import { ChatInputCommandInteraction, TextChannel, EmbedBuilder } from "discord.js";
import { Config } from "@systems/config";
import { loadResult, todayString } from "@systems/history";
import { normalizeSlot, detectSlot } from "@systems/scores";
import { replyAndDelete } from "@src/utils";
import { Nation } from "@types";

export async function handleResultPost(interaction: ChatInputCommandInteraction): Promise<void> {
  const slotArg = interaction.options.getString("slot");

  let slot: number | null = null;
  if (slotArg) {
    slot = normalizeSlot(slotArg);
    if (slot === null) return void replyAndDelete(interaction, `❌ Could not parse slot "${slotArg}".`);
  } else {
    slot = detectSlot() ?? Config.get({ section: "poll", key: "slots" })[0]?.tgHour ?? 20;
  }

  const result = loadResult(todayString(), slot);
  if (!result) return void replyAndDelete(interaction, `❌ No result found for ${slot}:00 TG.`);

  const kd = result.nationKD;

  const formatScores = (nation: Nation): string => {
    const scores = result.scores.filter((s) => s.nation === nation);
    if (scores.length === 0) return "—";
    return scores
      .sort((a, b) => b.pts - a.pts)
      .map((s) => `**${s.characterName}** (${s.class}) — ${s.pts} pts`)
      .join("\n");
  };

  const embed = new EmbedBuilder()
    .setTitle(`⚔️ TG Results — ${result.date} ${slot}:00`)
    .setColor(0xe8a317)
    .addFields(
      { name: "🔵 Capella", value: `${kd.capella.k}K / ${kd.capella.d}D\n${formatScores(Nation.Capella)}`, inline: true },
      { name: "🔴 Procyon", value: `${kd.procyon.k}K / ${kd.procyon.d}D\n${formatScores(Nation.Procyon)}`, inline: true },
    )
    .setFooter({ text: `Source of truth: ${kd.source}` })
    .setTimestamp();

  const channelId = Config.get({ section: "channels", key: "results" }) || Config.get({ section: "channels", key: "poll" });
  const channel   = await interaction.client.channels.fetch(channelId) as TextChannel;
  await channel.send({ embeds: [embed] });
  return void replyAndDelete(interaction, "✅ Results posted.");
}