import { useState, useEffect } from "react";
import { useParams, useNavigate } from "react-router-dom";
import { Game, Source } from "../items";
import { apiFetch, get_is_admin } from "./api";
import { LoadingState, EmptyState, ErrorState } from "./components/EmptyState";

interface Props {
  onShowToast?: (message: string, type?: "success" | "error" | "info") => void;
}

export function GameDetails({ onShowToast }: Props) {
  const { title } = useParams<{ title: string }>();
  const navigate = useNavigate();
  const [game, setGame] = useState<Game | null>(null);
  const [loading, setLoading] = useState(!!title);
  const [error, setError] = useState<string | null>(title ? null : "Game title is missing");

  const isAdmin = get_is_admin();

  useEffect(() => {
    if (!title) return;

    (async () => {
      try {
        const res = await apiFetch(`/api/game/${encodeURIComponent(title)}`);
        if (!res.ok) {
          if (res.status === 404) {
            throw new Error("Game not found");
          }
          throw new Error("Failed to load game");
        }
        const buffer = await res.arrayBuffer();
        setGame(Game.decode(new Uint8Array(buffer)));
      } catch (err) {
        console.error(err);
        setError(err instanceof Error ? err.message : "Failed to load game");
      } finally {
        setLoading(false);
      }
    })();
  }, [title]);

  const handleDelete = async () => {
    if (
      !confirm(
        `Are you sure you want to delete "${game?.title}"? This action cannot be undone.`
      )
    ) {
      return;
    }

    try {
      const res = await apiFetch(`/api/game/${encodeURIComponent(title || "")}`, {
        method: "DELETE",
      });

      if (res.ok) {
        onShowToast?.(`"${game?.title}" deleted successfully`, "success");
        navigate("/games");
      } else {
        onShowToast?.("Failed to delete game", "error");
      }
    } catch (err) {
      console.error(err);
      onShowToast?.("An error occurred while deleting the game", "error");
    }
  };

  if (loading) return <LoadingState message="Loading game details..." />;
  if (error) return <ErrorState message={error} onRetry={() => window.location.reload()} />;
  if (!game) return <EmptyState icon="🎮" title="Game not found" description="This game doesn't exist or has been deleted" />;

  const getExternalLink = () => {
    if (game.source === Source.STEAM) {
      return `https://store.steampowered.com/app/${game.remoteId}`;
    } else if (game.source === Source.ROBLOX) {
      return `https://www.roblox.com/games/${game.remoteId}`;
    }
    return "#";
  };

  return (
    <div className="card" style={{ maxWidth: "600px", margin: "0 auto" }}>
      <div
        style={{
          display: "flex",
          justifyContent: "space-between",
          alignItems: "center",
          marginBottom: "1rem",
        }}
      >
        <h2 style={{ margin: 0 }}>{game.title}</h2>
        {isAdmin && (
          <div style={{ display: "flex", gap: "0.5rem" }}>
            <button
              onClick={() => navigate(`/game/${encodeURIComponent(game.title)}/edit`)}
              className="btn-secondary"
              style={{ padding: "0.5rem 1rem", fontSize: "0.9rem" }}
            >
              ✏️ Edit
            </button>
            <button
              onClick={handleDelete}
              className="btn-primary"
              style={{
                padding: "0.5rem 1rem",
                fontSize: "0.9rem",
                background: "#f44336",
                border: "none",
              }}
            >
              🗑️ Delete
            </button>
          </div>
        )}
      </div>
      <div style={{ display: "grid", gap: "1rem", marginTop: "1rem" }}>
        <div>
          <strong>Source:</strong>{" "}
          {game.source === Source.STEAM ? "Steam" : "Roblox"}
        </div>
        <div>
          <strong>Players:</strong> {game.minPlayers} - {game.maxPlayers}
        </div>
        <div>
          <strong>Price:</strong> ${game.price}
        </div>
      </div>
      <div style={{ marginTop: "2rem" }}>
        <a
          href={getExternalLink()}
          target="_blank"
          rel="noopener noreferrer"
          className="btn-primary"
          style={{ textDecoration: "none", display: "inline-block" }}
        >
          View on {game.source === Source.STEAM ? "Steam" : "Roblox"}
        </a>
      </div>
    </div>
  );
}