import React, { useState, useEffect, useRef } from "react";
import GameDataManager from "../../../services/GameDataManager.js";
import "./DungeonScreen.css";

const DungeonScreen = ({ session, socket }) => {
  const [roomData, setRoomData] = useState(session.room);
  const [hostiles, setHostiles] = useState(session.hostiles || []);
  const [roomIndex, setRoomIndex] = useState(session.roomIndex);
  const [enemyHp, setEnemyHp] = useState(null);
  const [isEnemyDefeated, setIsEnemyDefeated] = useState(false);
  const [isLooted, setIsLooted] = useState(false);
  const [log, setLog] = useState([
    "SYSTEM: Neural link established. Scanning sector...",
  ]);

  const logEndRef = useRef(null);

  const currentEnemy = hostiles.length > 0 ? hostiles[0] : null;
  const dungeonData = GameDataManager.getDungeon(session.dungeonId);

  const getEnemyDisplayName = (enemy) => {
    if (!enemy) return "UNKNOWN_ENTITY";
    const data = GameDataManager.getEnemy(enemy.id);
    return data?.displayName || enemy.displayName || enemy.id;
  };

  const getRoomDisplayName = (room) => {
    if (!room) return "UNKNOWN_LOCATION";
    const data = GameDataManager.getRoom(room.id);
    return data?.displayName || room.displayName || room.id;
  };

  useEffect(() => {
    logEndRef.current?.scrollIntoView({ behavior: "smooth" });
  }, [log]);

  useEffect(() => {
    socket.on("dungeon:room_update", (data) => {
      setRoomData(data.room);
      setHostiles(data.hostiles || []);
      setRoomIndex(data.roomIndex);
      setIsEnemyDefeated(false);
      setIsLooted(false);
      setEnemyHp(null);
      addLog(`--- ENTERING SECTOR ${data.roomIndex + 1} ---`);
    });

    socket.on("dungeon:combat_result", (data) => {
      if (data.message) addLog(data.message);
      if (data.enemyHp !== undefined) {
        const maxHp = currentEnemy?.stats?.health || 100;
        const hpPercent = (data.enemyHp / maxHp) * 100;
        setEnemyHp(hpPercent);
      }
      if (data.targetDefeated) {
        setIsEnemyDefeated(true);
        addLog("TARGET_NEUTRALIZED: Threat eliminated.");
      }
    });

    return () => {
      socket.off("dungeon:room_update");
      socket.off("dungeon:combat_result");
    };
  }, [socket, currentEnemy]);

  const addLog = (text) => {
    const time = new Date().toLocaleTimeString([], {
      hour12: false,
      hour: "2-digit",
      minute: "2-digit",
      second: "2-digit",
    });
    setLog((prev) => [...prev, `[${time}] ${text}`]);
  };

  const handleCombat = () => {
    if (isEnemyDefeated || !currentEnemy) return;
    socket.emit("dungeon:combat_step", { enemyId: currentEnemy.id });
    addLog(`Initiating strike sequence...`);
  };

  const handleLoot = () => {
    setIsLooted(true);
    addLog("Loot encryption bypassed. Resources transferred.");
  };

  const handleNextRoom = () => {
    socket.emit("dungeon:next_room");
  };

  return (
    <div className="dungeon-active-screen">
      <div className="dungeon-header">
        <div className="room-progress">
          <div className="progress-text">
            SECTOR {roomIndex + 1} / {session.totalRooms}
          </div>
          <div className="progress-bar">
            <div
              className="fill"
              style={{
                width: `${((roomIndex + 1) / session.totalRooms) * 100}%`,
              }}
            ></div>
          </div>
        </div>
        <div className="dungeon-title-area">
          <div className="dungeon-name">
            {dungeonData?.displayName || "MISSION_ACTIVE"}
          </div>
          <div className="dungeon-status-tag">LIVE_FEED</div>
        </div>
      </div>

      <div className="environment-panel">
        <div className="env-header">ENVIRONMENT_SCAN</div>
        <div className="env-info">
          <div className="env-icon">
            <i
              className={`fas ${
                roomData?.id?.includes("boss")
                  ? "fa-skull"
                  : roomData?.id?.includes("loot")
                    ? "fa-box-open"
                    : "fa-microchip"
              }`}
            ></i>
          </div>
          <div className="env-details">
            <div className="env-id">{getRoomDisplayName(roomData)}</div>
            <div className="env-type">
              TYPE: {hostiles.length > 0 ? "COMBAT_ZONE" : "SECURE_AREA"}
            </div>
          </div>
        </div>
      </div>

      <div className="battle-layout">
        <div
          className={`enemy-display ${isEnemyDefeated ? "target-lost" : ""}`}
        >
          {currentEnemy ? (
            <div className={`enemy-card ${isEnemyDefeated ? "defeated" : ""}`}>
              <div className="threat-tag">
                {isEnemyDefeated ? "SIGNAL_LOST" : "HOSTILE_DETECTED"}
              </div>
              <div className="enemy-icon">
                <i
                  className={`fas ${isEnemyDefeated ? "fa-skull-crossbones" : "fa-robot"}`}
                ></i>
              </div>
              <h3 className="enemy-name">
                {getEnemyDisplayName(currentEnemy)}
              </h3>
              <div className="enemy-hp-container">
                <div className="hp-label">STRUCTURE INTEGRITY</div>
                <div className="hp-bar-mini">
                  <div
                    className="hp-fill-mini"
                    style={{
                      width: isEnemyDefeated
                        ? "0%"
                        : `${enemyHp !== null ? enemyHp : 100}%`,
                    }}
                  ></div>
                </div>
              </div>
              <div className="enemy-info-footer">
                <span>LVL: {currentEnemy.level || 1}</span>
                <span className="card-id">{currentEnemy.id}</span>
              </div>
            </div>
          ) : (
            <div className="empty-room">
              <i className="fas fa-satellite-dish"></i>
              <p>NO HOSTILES IN RANGE</p>
            </div>
          )}
        </div>

        <div className="combat-log-wrapper">
          <div className="log-header">COMBAT_LOG_V3.0</div>
          <div className="combat-log custom-scroll">
            {log.map((entry, i) => (
              <div key={i} className="log-entry">
                <span className="log-arrow">&gt;</span> {entry}
              </div>
            ))}
            <div ref={logEndRef} />
          </div>
        </div>
      </div>

      <div className="dungeon-controls">
        {!isEnemyDefeated && currentEnemy && (
          <button className="ctrl-btn combat" onClick={handleCombat}>
            <i className="fas fa-bolt"></i> ENGAGE
          </button>
        )}

        {isEnemyDefeated && !isLooted && (
          <button className="ctrl-btn loot" onClick={handleLoot}>
            <i className="fas fa-download"></i> COLLECT_ASSETS
          </button>
        )}

        {(isLooted || !currentEnemy) && (
          <button className="ctrl-btn next" onClick={handleNextRoom}>
            PROCEED <i className="fas fa-chevron-right"></i>
          </button>
        )}
      </div>
    </div>
  );
};

export default DungeonScreen;
