"use client";

import { useEffect, useState } from "react";
import Web3 from "web3";
import Commit from "./Commit";
import Reveal from "./Reveal";
import { showErrorToast } from "@/app/lib/toast";

export type Player = {
    addr: string;
    bet: string;
    encrMove: string;
    move: number;
    nickname: string;
};

export type GameDetails = {
    playerA: Player;
    playerB: Player;
    initialBet: string;
    outcome: number;
    isActive: boolean;
    returnGameId: number;
};

interface GameModalProps {
    gameId?: number;
    isOpen: boolean;
    onClose: () => void;
    account: string;
    contract: any;
    config: Config | null;
    web3: Web3 | null;
    setStatus: (status: string) => void;
}

export default function GameModal({
  gameId,
  isOpen,
  onClose,
  account,
  contract,
  config,
  web3,
  setStatus,
}: Readonly<GameModalProps>) {
  const [phase, setPhase] = useState<"commit" | "reveal">("commit");
  const [whoAmI, setWhoAmI] = useState<"player1" | "player2" | "">("");
  const [gameDetails, setGameDetails] = useState<GameDetails | null>(null);
  const [selectedMove, setSelectedMove] = useState<string | null>(null);
  const [secret, setSecret] = useState<string>("");

  // Helper function to generate game-specific storage key
  const getGameStorageKey = () => `game_${gameDetails?.returnGameId}`;

  // Game storage object structure
  type GameStorage = {
    secret: string;
    selectedMove: string | null;
    playMove: string;
  };

  // Storage helper functions
  const loadFromStorage = () => {
    if (!gameDetails) return;
    const storedData = sessionStorage.getItem(getGameStorageKey());
    if (storedData) {
      try {
        const parsed: GameStorage = JSON.parse(storedData);
        if (parsed.secret) setSecret(parsed.secret);
        if (parsed.selectedMove) setSelectedMove(parsed.selectedMove);
      } catch (err) {
        console.error("Failed to parse stored game data:", err);
      }
    }
  };

  const saveGameData = (updates: Partial<GameStorage>) => {
    const storedData = sessionStorage.getItem(getGameStorageKey());
    let currentData: GameStorage = { secret: "", selectedMove: null, playMove: "" };
    
    if (storedData) {
      try {
        currentData = JSON.parse(storedData);
      } catch (err) {
        console.error("Failed to parse stored game data:", err);
      }
    }
    
    const updatedData = { ...currentData, ...updates };
    sessionStorage.setItem(getGameStorageKey(), JSON.stringify(updatedData));
  };

  const saveSecret = (value: string) => {
    setSecret(value);
    saveGameData({ secret: value });
  };

  const saveMoveSelection = (move: string | null) => {
    setSelectedMove(move);
    if (move !== null) {
      saveGameData({ selectedMove: move });
    }
  };

  const savePlayMove = (playMove: string) => {
    saveGameData({ playMove });
  };


  useEffect(() => {
    const fetchPlayerInfo = async () => {
        if (contract && account && gameId !== undefined) {
            try {
                let player = await contract.methods.whoAmI(gameId).call({ from: account });
                if(player == 1) player = "player1";
                else if(player == 2) player = "player2";
                else player = "";
                setWhoAmI(player);
            } catch (err: any) {
                showErrorToast("Error fetching player info: " + err.message);
            }
        }
    }
    const fetchGameDetails = async () => {
      if (contract && gameId !== undefined) {
        try {
          const details = await contract.methods.getGameDetails(gameId).call();
          console.log("Game details:", details);
          setGameDetails(details);
          
          // Determine the correct phase based on game state
          const playerAHasMove = Number(details.playerA.encrMove) !== 0;
          const playerBHasMove = Number(details.playerB.encrMove) !== 0;
          const playerARevealed = Number(details.playerA.move) !== 0;
          const playerBRevealed = Number(details.playerB.move) !== 0;
          
          // If both players have revealed their moves, show reveal phase (with results)
          if (playerARevealed && playerBRevealed) {
            setPhase("reveal");
          }
          // If both players have committed but not revealed, show reveal phase
          else if (playerAHasMove && playerBHasMove) {
            setPhase("reveal");
          }
          // Otherwise, show commit phase
          else {
            setPhase("commit");
          }
        } catch (err: any) {
          showErrorToast("Error fetching game details: " + err.message);
        }
      }
    };

    // Only reset state when game ID actually changes (not on first render)
    if (gameDetails) {
      setSelectedMove(null);
      setSecret("");
    }

    fetchGameDetails();
    fetchPlayerInfo();

    // Refetch game details periodically every 2 seconds
    const intervalId = setInterval(fetchGameDetails, 2000);

    return () => clearInterval(intervalId);
    }, [contract, account, gameId]);

  // Load from storage after game details are fetched
  useEffect(() => {
    loadFromStorage();
  }, [gameDetails]);

  const handleClose = () => {
    // Reset state when closing
    setPhase("commit");
    setSelectedMove(null);
    setSecret("");
    onClose();
  };

  
  if (!isOpen) return null;

  return (
    <div className="fixed inset-0 bg-black/50 dark:bg-black/70 flex items-center justify-center z-50 p-4">
      <div className="bg-white dark:bg-slate-800 rounded-lg shadow-2xl max-w-2xl w-full max-h-[90vh] overflow-y-auto">
        {/* Header */}
        <div className="sticky top-0 bg-white dark:bg-slate-800 border-b border-slate-200 dark:border-slate-700 p-6 flex items-center justify-between">
          <div>
            <h2 className="text-2xl font-bold text-slate-900 dark:text-white">
              {gameId ? `Game #${gameId}` : "Game"}
            </h2>
            <p className="text-sm text-slate-600 dark:text-slate-400 mt-1">
              {phase === "commit"
                ? "Commit your move"
                : "Reveal your move"}
            </p>
          </div>
          <button
            onClick={handleClose}
            className="text-2xl text-slate-400 hover:text-slate-600 dark:hover:text-slate-300 transition-colors"
          >
            ✕
          </button>
        </div>

        {/* Content */}
        <div className="p-6">
          
          {/* Phase Content */}
          <div>
            {phase === "commit" && (
              <Commit
                account={account}
                contract={contract}
                config={config}
                web3={web3}
                whoAmI={whoAmI}
                gameDetails={gameDetails}
                setStatus={setStatus}
                selectedMove={selectedMove}
                setSelectedMove={saveMoveSelection}
                secret={secret}
                setSecret={saveSecret}
                savePlayMove={savePlayMove}
              />
            )}
            {phase === "reveal" && (
              <Reveal
                account={account}
                contract={contract}
                config={config}
                web3={web3}
                setStatus={setStatus}
                selectedMove={selectedMove}
                secret={secret}
                gameDetails={gameDetails}
                whoAmI={whoAmI}
              />
            )}
          </div>
        </div>
      </div>
    </div>
  );
}