import { Config } from "@systems/config";
import { submitScore, detectSlot, normalizeSlot } from "@systems/scores";
import { getEffectiveCharacter } from "@systems/borrow";
import { format } from "@format";
import { getEmoji } from "@systems/emojis";

// ─── Types ────────────────────────────────────────────────────────────────────

export interface ScoreSubmitInput {
  userKey:  string;
  pts:      number;
  slot?:    number | string | null;  // number = already resolved, string = needs normalizing, null/undefined = auto-detect
  k?:       number;
  d?:       number;
  atk?:     number;
  def?:     number;
  heal?:    number;
  submittedByOfficer?: boolean;
}

export type ScoreSubmitResult =
  | { ok: true;  message: string }
  | { ok: false; message: string };

// ─── Core ─────────────────────────────────────────────────────────────────────

export namespace score {
  /**
   * Resolve, validate and persist a score submission for a given userKey.
   * Used by both the slash command handler and the modal submit handler.
   */
  export async function submitForUser(input: ScoreSubmitInput): Promise<ScoreSubmitResult> {
    const { userKey, pts, k, d, atk, def, heal, submittedByOfficer = false } = input;

    const { char, borrowedFrom } = getEffectiveCharacter(userKey);
    if (!char) {
      return { ok: false, message: "❌ No active character found. Use `/tg char set-active` first." };
    }

    // Resolve slot
    let slot: number | null = null;
    if (typeof input.slot === "number") {
      slot = input.slot;
    } else if (typeof input.slot === "string") {
      slot = normalizeSlot(input.slot);
      if (slot === null) {
        return { ok: false, message: `❌ Could not parse slot "${input.slot}".` };
      }
    } else {
      slot = detectSlot() ?? Config.get({ section: "poll", key: "slots" }).find((s) => s.active)?.tgHour ?? 20;
    }

    await submitScore({
      userKey:            borrowedFrom ?? userKey,
      playedBy:           borrowedFrom ? userKey : undefined,
      characterName:      char.name,
      cls:                char.class,
      nation:             char.nation,
      pts,
      k,
      d,
      slot,
      atk,
      def,
      heal,
      submittedByOfficer,
    });

    const scoreEmoji = getEmoji("score") || "📊";
    const kdEmoji    = getEmoji("kd")    || "⚔️";
    const kdNote     = k !== undefined && d !== undefined ? `\n${kdEmoji} ${k}/${d}` : "";
    const statsNote  = [
      atk  !== undefined ? `ATK: ${atk}`   : null,
      def  !== undefined ? `DEF: ${def}`   : null,
      heal !== undefined ? `HEAL: ${heal}` : null,
    ].filter(Boolean).join(" · ");

    const charDisplay = format.char(char);
    const borrowNote  = borrowedFrom ? ` *(borrowed from ${borrowedFrom})*` : "";
    
    const line = format.scoreSubmitLine({
      slot,
      char,
      pts,
      k,
      d,
      atk,
      def,
      heal,
    });
    
    return {
      ok:      true,
      message: `✅ ${line}${borrowNote}`,
    };
  }
}