"use client";
import { useState, useEffect, useRef, useCallback } from "react";
import { useSession } from "next-auth/react";
import { useRouter } from "next/navigation";
import Link from "next/link";
import styles from "./map.module.css";
import NavBar from "@/components/NavBar";
import {
  getHuntTimer,
  setHuntTimer,
  clearHuntTimer,
  formatElapsedTime,
  syncTimerWithServer,
} from "@/utils/timerService";

export default function MapPage() {
  const { data: session, status } = useSession();
  const [loading, setLoading] = useState(true);
  const [mapError, setMapError] = useState(false);
  const [error, setError] = useState(null);
  const [teamData, setTeamData] = useState(null);
  const [elapsedTime, setElapsedTime] = useState("00:00:00");
  const [clues, setClues] = useState([]);
  const mapContainerRef = useRef(null);
  const router = useRouter();
  const isMounted = useRef(true);

  const [huntActive, setHuntActive] = useState(null);
  const [previousHuntState, setPreviousHuntState] = useState(null);

  const softRedirect = useCallback(
    (url) => {
      if (isMounted.current) {
        router.push(url);
      }
    },
    [router]
  );

  const hardRedirect = useCallback((url) => {
    window.location.href = url;
  }, []);

  const fetchTeamData = useCallback(async () => {
    try {
      const response = await fetch("/api/user/team", {
        method: "GET",
        headers: {
          "Content-Type": "application/json",
          "Cache-Control": "no-cache, no-store, must-revalidate",
          Pragma: "no-cache",
        },
        credentials: "include",
      });

      if (response.status === 401) {
        softRedirect("/login");
        return null;
      }

      if (response.status === 404) {
        softRedirect("/team-selection");
        return null;
      }

      if (!response.ok) {
        throw new Error("Failed to fetch team data");
      }

      const data = await response.json();
      console.log("Team data loaded:", data);
      setTeamData(data);
      return data;
    } catch (err) {
      console.error("Failed to fetch team data:", err);
      setError(err.message);
      return null;
    }
  }, [softRedirect]);

  const fetchClues = useCallback(async () => {
    try {
      const response = await fetch("/api/clues", {
        method: "GET",
        headers: {
          "Content-Type": "application/json",
          "Cache-Control": "no-cache, no-store, must-revalidate",
          Pragma: "no-cache",
        },
        credentials: "include",
      });

      if (!response.ok) {
        const errorData = await response.json().catch(() => ({}));
        console.error("API response details:", {
          status: response.status,
          statusText: response.statusText,
          errorData,
        });

        throw new Error(
          errorData.error ||
            `Failed to fetch clues: ${response.status} ${response.statusText}`
        );
      }

      const data = await response.json();

      const processedClues = data.map((clue) => {
        return {
          ...clue,
          available: clue.available || clue.found || clue.skipped,
        };
      });

      setClues(processedClues);
      setLoading(false);
      return processedClues;
    } catch (err) {
      console.error("Failed to fetch clues:", err);
      setError(err.message);
      setLoading(false);
      return [];
    }
  }, []);

  const handleClueClick = useCallback(
    (clueId, isAvailable, isFound) => {
      if (isFound || isAvailable) {
        router.push(`/clue/${clueId}`);
      } else {
        alert("Complete previous clues to unlock this one!");
      }
    },
    [router]
  );

  const setupOverlay = useCallback(() => {
    const overlay = document.getElementById("map-overlay-container");
    const mapImg = document.getElementById("treasure-map-img");

    if (overlay && mapImg) {
      mapImg.onload = () => {
        const mapRect = mapImg.getBoundingClientRect();
        overlay.style.width = `${mapRect.width}px`;
        overlay.style.height = `${mapRect.height}px`;
      };

      const resizeOverlay = () => {
        const mapRect = mapImg.getBoundingClientRect();
        overlay.style.width = `${mapRect.width}px`;
        overlay.style.height = `${mapRect.height}px`;
      };

      setTimeout(resizeOverlay, 300);
      window.addEventListener("resize", resizeOverlay);

      return () => {
        window.removeEventListener("resize", resizeOverlay);
      };
    }
  }, []);

  useEffect(() => {
    if (status === "authenticated") {
      fetchClues();
      fetchTeamData();
    } else if (status === "unauthenticated") {
      softRedirect("/login");
    }

    return () => {
      isMounted.current = false;
    };
  }, [status, fetchClues, fetchTeamData, softRedirect]);

  useEffect(() => {
    if (!loading && clues.length > 0) {
      return setupOverlay();
    }
  }, [loading, clues.length, setupOverlay]);

  async function checkHuntAndTimer() {
    try {
      const response = await fetch("/api/hunt-status", {
        method: "GET",
        headers: {
          "Content-Type": "application/json",
          "Cache-Control": "no-cache, no-store, must-revalidate",
          Pragma: "no-cache",
        },
        credentials: "include",
      });

      if (response.ok) {
        const data = await response.json();
        setHuntActive(data.active);

        if (data.active === false) {
          router.push("/waiting");
          return;
        }

        if (data.active && data.startTime) {
          setHuntTimer(data.startTime);
        }
      }
    } catch (err) {
      console.error("Failed to check hunt status:", err);
    }
  }

  async function fetchTeamHuntStartTime() {
    try {
      const timerData = getHuntTimer();
      if (timerData && timerData.startTime) {
        return true;
      }

      const result = await syncTimerWithServer();
      return result.success;
    } catch (err) {
      console.error("Error fetching team hunt start time:", err);
      return false;
    }
  }

  useEffect(() => {
    let timerId;

    async function initializeTimer() {
      await fetchTeamHuntStartTime();

      const updateTimer = () => {
        const timerData = getHuntTimer();
        if (timerData && timerData.startTime) {
          setElapsedTime(formatElapsedTime(timerData.startTime));
        }
      };

      updateTimer();

      timerId = setInterval(updateTimer, 1000);
    }

    initializeTimer();

    return () => {
      if (timerId) clearInterval(timerId);
    };
  }, []);

  useEffect(() => {
    checkHuntAndTimer();

    const huntStatusInterval = setInterval(checkHuntAndTimer, 10000);

    return () => {
      clearInterval(huntStatusInterval);
    };
  }, [softRedirect, hardRedirect]);

  useEffect(() => {
    if (status === "authenticated") {
      fetchTeamData();
    }
  }, [status, fetchTeamData]);

  useEffect(() => {
    if (previousHuntState === true && huntActive === false) {
      console.log("Hunt has ended! Redirecting to leaderboard...");
      router.push("/leaderboard?huntEnded=true");
    }

    setPreviousHuntState(huntActive);
  }, [huntActive, previousHuntState, router]);

  if (status === "loading" || loading) {
    return (
      <div className={styles["loading-container"]}>
        <div className={styles["loading-spinner"]}></div>
        <div>Loading map...</div>
      </div>
    );
  }

  if (huntActive === false && previousHuntState === null) {
    return (
      <div className={styles["map-error"]}>
        <h2>Hunt Not Active</h2>
        <p>The treasure hunt has not started yet.</p>
        <button onClick={() => softRedirect("/waiting")}>
          Go to Waiting Room
        </button>
      </div>
    );
  }

  if (error) {
    return (
      <div className={styles["map-error"]}>
        <h2>Error</h2>
        <p>{error}</p>
        <button onClick={fetchTeamData}>Retry</button>
      </div>
    );
  }

  if (mapError) {
    return (
      <div className={styles["map-error"]}>
        <h2>Error Loading Map</h2>
        <p>We couldn't load the treasure map. Please try again.</p>
        <button onClick={fetchClues}>Retry</button>
      </div>
    );
  }

  const getClueButtonClass = (clue) => {
    if (clue.found) return `${styles["clue-button"]} ${styles["clue-found"]}`;
    if (clue.skipped)
      return `${styles["clue-button"]} ${styles["clue-skipped"]}`;
    if (clue.available)
      return `${styles["clue-button"]} ${styles["clue-available"]}`;
    return `${styles["clue-button"]} ${styles["clue-locked"]}`;
  };

  const firstClue = clues.length > 0 ? clues[0] : null;

  const renderClueButton = (index, position) => {
    if (index >= clues.length) return null;

    const clue = clues[index];
    return (
      <button
        key={clue.id}
        className={getClueButtonClass(clue)}
        onClick={() => handleClueClick(clue.id, clue.available, clue.found)}
        style={{
          left: position.left,
          top: position.top,
        }}
      ></button>
    );
  };

  return (
    <div className={styles["map-page"]}>
      <div className={styles["map-banner"]}>
        <div className={styles["team-name"]}>
          Team Name: {teamData?.team?.name || "Loading..."}
        </div>
        <div className={styles["elapsed-time"]}>
          <span className={styles["time-value"]}>{elapsedTime}</span>
        </div>
        <div className={styles["team-code"]}>{teamData?.team?.code || ""}</div>
      </div>

      <div className={styles["map-container"]} ref={mapContainerRef}>
        <div className={styles["treasure-map"]}>
          <div className={styles["map-image-container"]}>
            <img
              id="treasure-map-img"
              src="/images/map.svg"
              alt="Treasure Map"
              className={styles["map-image"]}
            />

            <div id="map-overlay-container" className={styles["map-overlay"]}>
              {renderClueButton(0, { left: "230px", top: "212px" })}
              {renderClueButton(1, { left: "320px", top: "285px" })}
              {renderClueButton(2, { left: "265px", top: "400px" })}
              {renderClueButton(3, { left: "343px", top: "520px" })}
              {renderClueButton(4, { left: "320px", top: "646px" })}
              {renderClueButton(5, { left: "298px", top: "774px" })}
              {renderClueButton(6, { left: "240px", top: "880px" })}
              {renderClueButton(7, { left: "355px", top: "960px" })}
              {renderClueButton(8, { left: "266px", top: "1037px" })}
              {renderClueButton(9, { left: "280px", top: "1175px" })}
              {renderClueButton(10, { left: "336px", top: "1303px" })}
              {renderClueButton(11, { left: "250px", top: "1390px" })}
              {renderClueButton(12, { left: "165px", top: "1485px" })}
              {renderClueButton(13, { left: "305px", top: "1530px" })}
              {renderClueButton(14, { left: "340px", top: "1650px" })}
              {renderClueButton(15, { left: "225px", top: "1725px" })}
              {renderClueButton(16, { left: "220px", top: "1820px" })}
              {renderClueButton(17, { left: "275px", top: "1885px" })}
              {renderClueButton(18, { left: "362px", top: "1917px" })}
              {renderClueButton(19, { left: "300px", top: "2040px" })}
            </div>
          </div>
        </div>
      </div>

      <NavBar activeLink="map" teamData={teamData?.team} />
    </div>
  );
}