import Link from "next/link";
import { ArrowRight } from "lucide-react";
import { PixelTrophy, PlayerAvatar } from "./PixelArt";
import {
  formatScore,
  type LeaderboardData,
  type LeaderboardEntry,
} from "@/shared/leaderboard";

export function LeaderboardEmpty({
  unavailable = false,
  search = false,
}: {
  unavailable?: boolean;
  search?: boolean;
}) {
  return (
    <div
      className="leaderboard-empty"
      role={unavailable ? "status" : undefined}
    >
      <PixelTrophy />
      <h2>
        {unavailable
          ? "The scoreboard is taking a break."
          : search
            ? "No explorers found."
            : "The first place is still open."}
      </h2>
      <p>
        {unavailable
          ? "We couldn’t load the scores. Try again in a moment."
          : search
            ? "Try another player name or clear your search."
            : "Log in and finish five rounds to put your name on the board."}
      </p>
      {!search && (
        <Link
          href={unavailable ? "/leaderboard" : "/servers"}
          className="button primary"
        >
          {unavailable ? "Reload scores" : "Play an expedition"}{" "}
          <ArrowRight size={16} />
        </Link>
      )}
    </div>
  );
}

export function LeaderboardTable({
  entries,
  compact = false,
  playerId,
}: {
  entries: LeaderboardEntry[];
  compact?: boolean;
  playerId?: string;
}) {
  return (
    <div className={`leaderboard-table-wrap${compact ? " compact" : ""}`}>
      <table className="leaderboard-table">
        <caption className="sr-only">
          Players ranked by best five-round score. Ties are broken by average
          score, then games played.
        </caption>
        <thead>
          <tr>
            <th scope="col" className="rank-column">
              Rank
            </th>
            <th scope="col">Explorer</th>
            {!compact && (
              <th scope="col" className="games-column">
                Games
              </th>
            )}
            {!compact && (
              <th scope="col" className="average-column">
                Average
              </th>
            )}
            <th scope="col" className="score-column">
              Best score
            </th>
          </tr>
        </thead>
        <tbody>
          {entries.map((entry) => (
            <tr
              key={entry.player_id}
              className={entry.player_id === playerId ? "your-row" : undefined}
            >
              <td className="rank-column">
                <span
                  className={`rank-number${entry.rank <= 3 ? ` place-${entry.rank}` : ""}`}
                >
                  {String(entry.rank).padStart(2, "0")}
                </span>
              </td>
              <th scope="row">
                <div className="leaderboard-player">
                  <PlayerAvatar id={entry.player_id} />
                  <span className="player-name">
                    {entry.display_name}
                    {entry.player_id === playerId && (
                      <span className="you-label">You</span>
                    )}
                  </span>
                </div>
              </th>
              {!compact && (
                <td className="games-column">
                  {formatScore(entry.games_played)}
                </td>
              )}
              {!compact && (
                <td className="average-column">
                  {formatScore(entry.average_score)}
                </td>
              )}
              <td className="score-column">
                <strong>{formatScore(entry.best_score)}</strong>
                <span className="score-unit"> pts</span>
              </td>
            </tr>
          ))}
        </tbody>
      </table>
    </div>
  );
}

export function WinnersPodium({ leaders }: { leaders: LeaderboardEntry[] }) {
  return (
    <section className="winners-podium" aria-label="Top three explorers">
      {leaders.map((entry, index) => (
        <article
          className={`podium-place podium-${index + 1}`}
          key={entry.player_id}
        >
          <div className="podium-player">
            <span className="podium-label">
              {index === 0 ? "TOP EXPLORER" : `PLACE 0${index + 1}`}
            </span>
            <PlayerAvatar id={entry.player_id} />
            <h2>{entry.display_name}</h2>
            <p>
              {formatScore(entry.best_score)} <span>/ 25,000</span>
            </p>
          </div>
          <div className="podium-block" aria-hidden="true">
            <span>0{index + 1}</span>
            {index === 0 && <PixelTrophy />}
          </div>
        </article>
      ))}
    </section>
  );
}

export function LeaderboardPreview({ data }: { data: LeaderboardData | null }) {
  return (
    <section
      className="section home-leaderboard"
      aria-labelledby="home-leaderboard-heading"
    >
      <div className="leaderboard-preview-copy">
        <div className="leaderboard-kicker">
          <PixelTrophy />
          <span className="eyebrow">THE EXPLORERS’ BOARD</span>
        </div>
        <h2 id="home-leaderboard-heading">
          Good eye.
          <br /> <span>Great guess.</span>
        </h2>
        <p>
          Five rounds to find your way.
          <br /> One score to make your mark.
        </p>
        <Link className="text-link" href="/leaderboard">
          See the full leaderboard <ArrowRight size={16} />
        </Link>
      </div>
      <div className="leaderboard-preview-board">
        <div className="board-heading">
          <span>Top explorers</span>
          <span>All difficulties · All time</span>
        </div>
        {data?.entries.length ? (
          <LeaderboardTable entries={data.entries} compact />
        ) : (
          <LeaderboardEmpty unavailable={!data} />
        )}
        <div className="board-footnote">
          Best expedition score ·{" "}
          {data
            ? `${formatScore(data.total_players)} ranked ${data.total_players === 1 ? "explorer" : "explorers"}`
            : "Scores temporarily unavailable"}
        </div>
      </div>
    </section>
  );
}