import { ChatInputCommandInteraction } from "discord.js";
import { Config } from "@systems/config";
import { resolveUser, hasOfficerRole } from "@systems/users";
import { WRank } from "@systems/wrank";
import { Bringer } from "@systems/bringer";
import { replyAndDelete } from "@src/utils";
import { Nation } from "@types";
import { TG } from "@systems/tg";
import { Nations } from "@systems/nations";

export async function handleRankGet(interaction: ChatInputCommandInteraction): Promise<void> {
  const member    = await interaction.guild!.members.fetch(interaction.user.id);
  const isOfficer = hasOfficerRole(member, Config.get({ section: "roles", key: "officer" }));
  const nameArg   = interaction.options.getString("name");

  if (nameArg && !isOfficer) {
    return void replyAndDelete(interaction, "❌ Only officers can view other players' ranks.");
  }

  let userKey: string | null;
  if (nameArg) {
    userKey = nameArg;
  } else {
    const user = await resolveUser(member);
    userKey = user.userKey;
  }

  if (!userKey) return void replyAndDelete(interaction, "❌ You are not registered in the system.");

  const week = TG.currentWeek();
  const goal = Config.get({ section: "wrank", key: "goal" });
  const weekKey = WRank.weekKey();

  for (const nation of Nations.all()) {
    const entry = week.entries[nation].find((e) => e.userKey === userKey);
    if (!entry) continue;

    const isDone   = entry.tgCount >= goal;
    const delta    = entry.previousRank !== undefined ? entry.currentRank - entry.previousRank : 0;
    const deltaStr = delta < 0 ? ` (↑${Math.abs(delta)})` : delta > 0 ? ` (↓${delta})` : "";
    const bringer  = Bringer.get({ nation: entry.nation });
    const isBringer = bringer === userKey && isDone;

    const lines = [
      `**${entry.characterName}** · ${entry.nation}`,
      `**W.Rank:** ${entry.currentRank}${deltaStr}${isBringer ? ` · ${entry.nation === Nation.Capella ? "Luminous Bringer" : "Storm Bringer"}` : ""}`,
      `**Points:** ${entry.weeklyPoints}`,
      `**TGs done:** ${entry.tgCount}/${goal}${isDone ? " ✅" : ""}`,
      `**Week:** ${weekKey}`,
    ].join("\n");

    return void replyAndDelete(interaction, lines);
  }

  return void replyAndDelete(interaction, `❌ No rank found for **${userKey}** this week.`);
}