import React, { useState, useEffect } from "react";
import { motion } from "framer-motion";
import { useNakama } from "./providers/NakamaProvider";

import Player from "./Player";
import TicTacToeGame from "./games/tictactoe/TicTacToeGame";
import { TicTacToeGameProps } from "./games/tictactoe/props";
import BattleshipGame from "./games/battleship/BattleshipGame"
import { BattleshipGameProps } from "./games/battleship/props";

import { GameState } from "./interfaces/states";
import { GameProps } from "./interfaces/props";

const INITIAL_GAME_STATE: GameState = {
  boards: {},
  turn: 0,
  winner: null,
  gameOver: false,
  players: [],
  metadata: {},
};

export default function App() {
  // unified game state
  const [game, setGame] = useState<GameState>(INITIAL_GAME_STATE);
  const { onMatchData, matchId, session } = useNakama();

  const commonProps: GameProps = {
    boards: game.boards,
    turn: game.turn,
    winner: game.winner,
    gameOver: game.gameOver,
    players: game.players,
    myUserId: session?.user_id ?? null,
  };
  const ticTacToeProps: TicTacToeGameProps = {
    ...commonProps,
  };
  const battleshipProps: BattleshipGameProps = {
    ...commonProps,
    metadata: game.metadata,
  };

  // ---------------------------------------------------
  // RENDER GAME BOARD
  // ---------------------------------------------------
  function renderGameBoard() {
    if (!matchId || !game.metadata?.game) return null;

    switch (game.metadata.game) {
      case "tictactoe":
        return (
          <TicTacToeGame
            {...ticTacToeProps}
          />
        );

      case "battleship":
        return (
          <BattleshipGame
            {...battleshipProps}
          />
        );

      default:
        return <div>Unknown game: {game.metadata.game}</div>;
    }
  }

  // ------------------------------------------
  // MATCH DATA CALLBACK (from Player component)
  // ------------------------------------------
  function onMatchDataCallback(msg: { opCode: number; data: any }) {
    console.log("[Match Data]", msg);

    if (msg.opCode === 2) {
      const state = msg.data;
      console.log("Match state:", state);

      setGame({
        boards: state.boards,
        turn: state.turn,
        gameOver: state.game_over,
        winner:
          state.winner >= 0 ? state.players[state.winner].username : null,
        players: state.players ?? [],
        metadata: state.metadata ?? {},
      });
    }
  }

  // ---------------------------------------------------
  // EFFECTS
  // ---------------------------------------------------
  useEffect(() => {
    document.body.style.overflow = "hidden";
    return () => {
      document.body.style.overflow = "auto";
    };
  }, []);

  useEffect(() => {
    onMatchData(onMatchDataCallback);
  }, [onMatchData]);

  // ---------------------------------------------------
  // UI LAYOUT
  // ---------------------------------------------------
  return (
    <div
      style={{
        height: "100vh",
        display: "flex",
        flexDirection: "column",
        background: "#060606",
        color: "white",
        overflow: "hidden",
      }}
    >
      {/* ---------------- HEADER (always fixed at top) ---------------- */}
      <header
        style={{
          padding: "16px 20px",
          background: "rgba(255,255,255,0.04)",
          borderBottom: "1px solid rgba(255,255,255,0.08)",
          backdropFilter: "blur(6px)",
          textAlign: "center",
          fontSize: "26px",
          fontWeight: 700,
          letterSpacing: "1px",
        }}
      >
        Games
      </header>

      {/* ---------------- MAIN CONTENT (scrolls) ---------------- */}
      <motion.div
        initial={{ opacity: 0 }}
        animate={{ opacity: 1 }}
        style={{
          flex: 1,
          overflowY: "auto",
          padding: "20px",
          display: "flex",
          flexDirection: "column",
          alignItems: "center",
        }}
      >
        <Player onMatchDataCallback={onMatchDataCallback} />

        <div
          style={{
            padding: "20px",
            background: "rgba(255,255,255,0.03)",
            borderRadius: "20px",
            boxShadow: "0 6px 20px rgba(0,0,0,0.4)",
            minWidth: "300px",
          }}
        >
          {renderGameBoard()}
        </div>
      </motion.div>
    </div>
  );
}