"use client";

import { useState, useEffect, useMemo } from "react";

// ========================================
// 타입 정의
// ========================================
export type DeviceType = "mobile" | "tablet";
export type OrientationType = "landscape" | "portrait";

export interface ResponsiveMode {
  device: DeviceType;
  orientation: OrientationType;
  isLandscape: boolean;
  modeKey: "tablet_landscape" | "tablet_portrait" | "mobile_landscape" | "mobile_portrait";
}

// ========================================
// 브레이크포인트 (화면 너비 기준)
// GRID_BREAKPOINTS와 일치해야 함!
// ========================================
const BREAKPOINTS = {
  // mobile_portrait: ~479px (4칸)
  // mobile_landscape: 480~767px (6칸)
  // tablet_portrait: 768~1023px (8칸)
  // tablet_landscape: 1024px~ (12칸)
  TABLET_MIN: 768,  // 768px 이상이면 tablet
};

/**
 * 반응형 모드 자동 감지 훅
 * 
 * - 화면 크기와 방향에 따라 4가지 모드 자동 전환
 * - tablet_landscape, tablet_portrait, mobile_landscape, mobile_portrait
 * - resize 이벤트와 orientation 변경 모두 감지
 * 
 * @returns ResponsiveMode 객체
 */
export function useResponsiveMode(): ResponsiveMode {
  const [mode, setMode] = useState<ResponsiveMode>({
    device: "tablet",
    orientation: "landscape",
    isLandscape: true,
    modeKey: "tablet_landscape",
  });

  useEffect(() => {
    if (typeof window === "undefined") return;

    const detectMode = (): ResponsiveMode => {
      const width = window.innerWidth;
      const height = window.innerHeight;
      
      // 디바이스 타입 결정 (화면 너비 기준)
      const device: DeviceType = width >= BREAKPOINTS.TABLET_MIN ? "tablet" : "mobile";
      
      // 방향 결정 (가로/세로 비율)
      const isLandscape = width > height;
      const orientation: OrientationType = isLandscape ? "landscape" : "portrait";
      
      // 모드 키 생성
      const modeKey = `${device}_${orientation}` as ResponsiveMode["modeKey"];

      return { device, orientation, isLandscape, modeKey };
    };

    // 초기값 설정
    setMode(detectMode());

    const handleChange = () => {
      setTimeout(() => {
        setMode(detectMode());
      }, 100);
    };

    // 이벤트 리스너 등록
    window.addEventListener("resize", handleChange);
    window.addEventListener("orientationchange", handleChange);

    // matchMedia로 orientation 변경 감지
    const landscapeQuery = window.matchMedia("(orientation: landscape)");
    if (landscapeQuery.addEventListener) {
      landscapeQuery.addEventListener("change", handleChange);
    }

    return () => {
      window.removeEventListener("resize", handleChange);
      window.removeEventListener("orientationchange", handleChange);
      if (landscapeQuery.removeEventListener) {
        landscapeQuery.removeEventListener("change", handleChange);
      }
    };
  }, []);

  return mode;
}

/**
 * 디바이스 방향(orientation) 감지 커스텀 훅
 * 
 * - 실제 디바이스에서 가로/세로 방향 변경을 감지
 * - window.matchMedia와 orientationchange 이벤트 활용
 * - SSR 호환성 고려 (typeof window !== 'undefined')
 * 
 * @returns isLandscape - true: 가로 모드, false: 세로 모드
 */
export function useDeviceOrientation(): boolean {
  const [isLandscape, setIsLandscape] = useState<boolean>(false);

  useEffect(() => {
    if (typeof window === "undefined") return;

    const detectOrientation = (): boolean => {
      if (window.matchMedia) {
        const landscapeQuery = window.matchMedia("(orientation: landscape)");
        return landscapeQuery.matches;
      }
      return window.innerWidth > window.innerHeight;
    };

    setIsLandscape(detectOrientation());

    const handleOrientationChange = () => {
      setTimeout(() => {
        setIsLandscape(detectOrientation());
      }, 100);
    };

    const landscapeQuery = window.matchMedia("(orientation: landscape)");
    
    if (landscapeQuery.addEventListener) {
      landscapeQuery.addEventListener("change", handleOrientationChange);
    } else if (landscapeQuery.addListener) {
      landscapeQuery.addListener(handleOrientationChange);
    }

    window.addEventListener("orientationchange", handleOrientationChange);
    window.addEventListener("resize", handleOrientationChange);

    return () => {
      if (landscapeQuery.removeEventListener) {
        landscapeQuery.removeEventListener("change", handleOrientationChange);
      } else if (landscapeQuery.removeListener) {
        landscapeQuery.removeListener(handleOrientationChange);
      }
      window.removeEventListener("orientationchange", handleOrientationChange);
      window.removeEventListener("resize", handleOrientationChange);
    };
  }, []);

  return isLandscape;
}

/**
 * 수동 방향 전환을 지원하는 확장 훅
 * 프리뷰 모드에서 테스트 목적으로 사용
 * 
 * @param initialOverride - 초기 수동 설정값 (undefined면 자동 감지)
 * @returns [isLandscape, setIsLandscape, isAutoDetect]
 */
export function useDeviceOrientationWithOverride(
  initialOverride?: boolean
): [boolean, (value: boolean | undefined) => void, boolean] {
  const autoDetectedIsLandscape = useDeviceOrientation();
  const [manualOverride, setManualOverride] = useState<boolean | undefined>(initialOverride);

  const isLandscape = manualOverride !== undefined ? manualOverride : autoDetectedIsLandscape;
  const isAutoDetect = manualOverride === undefined;

  const setOrientation = (value: boolean | undefined) => {
    setManualOverride(value);
  };

  return [isLandscape, setOrientation, isAutoDetect];
}

/**
 * 반응형 모드 + 수동 오버라이드 지원 훅
 * 프리뷰 모드에서 디바이스/방향을 수동으로 변경할 때 사용
 */
export function useResponsiveModeWithOverride(
  initialDeviceOverride?: DeviceType,
  initialOrientationOverride?: boolean
): {
  mode: ResponsiveMode;
  setDevice: (device: DeviceType | undefined) => void;
  setOrientation: (isLandscape: boolean | undefined) => void;
  isAutoDetect: boolean;
} {
  const autoMode = useResponsiveMode();
  const [deviceOverride, setDeviceOverride] = useState<DeviceType | undefined>(initialDeviceOverride);
  const [orientationOverride, setOrientationOverride] = useState<boolean | undefined>(initialOrientationOverride);

  const mode = useMemo((): ResponsiveMode => {
    const device = deviceOverride ?? autoMode.device;
    const isLandscape = orientationOverride ?? autoMode.isLandscape;
    const orientation: OrientationType = isLandscape ? "landscape" : "portrait";
    const modeKey = `${device}_${orientation}` as ResponsiveMode["modeKey"];

    return { device, orientation, isLandscape, modeKey };
  }, [autoMode, deviceOverride, orientationOverride]);

  const isAutoDetect = deviceOverride === undefined && orientationOverride === undefined;

  return {
    mode,
    setDevice: setDeviceOverride,
    setOrientation: setOrientationOverride,
    isAutoDetect,
  };
}