/**
 * 图片预览弹窗组件
 * 支持多张图片左右切换、缩放、下载
 */

import React, { useState } from 'react';
import {
  Modal,
  ModalOverlay,
  ModalContent,
  ModalBody,
  ModalCloseButton,
  Image,
  IconButton,
  HStack,
  Text,
  Box,
} from '@chakra-ui/react';
import { ChevronLeft, ChevronRight, Download, ZoomIn, ZoomOut } from 'lucide-react';
import { motion, AnimatePresence } from 'framer-motion';
import { GLASS_BLUR } from '@/constants/glassConfig';

const MotionBox = motion(Box);

const ImagePreviewModal = ({ isOpen, onClose, images = [], initialIndex = 0 }) => {
  const [currentIndex, setCurrentIndex] = useState(initialIndex);
  const [scale, setScale] = useState(1);

  // 切换到上一张
  const handlePrevious = () => {
    setCurrentIndex((prev) => (prev - 1 + images.length) % images.length);
    setScale(1); // 重置缩放
  };

  // 切换到下一张
  const handleNext = () => {
    setCurrentIndex((prev) => (prev + 1) % images.length);
    setScale(1); // 重置缩放
  };

  // 放大
  const handleZoomIn = () => {
    setScale((prev) => Math.min(prev + 0.25, 3));
  };

  // 缩小
  const handleZoomOut = () => {
    setScale((prev) => Math.max(prev - 0.25, 0.5));
  };

  // 下载图片
  const handleDownload = () => {
    const link = document.createElement('a');
    link.href = images[currentIndex];
    link.download = `image-${currentIndex + 1}.jpg`;
    document.body.appendChild(link);
    link.click();
    document.body.removeChild(link);
  };

  // 键盘快捷键
  React.useEffect(() => {
    const handleKeyDown = (e) => {
      if (!isOpen) return;

      switch (e.key) {
        case 'ArrowLeft':
          handlePrevious();
          break;
        case 'ArrowRight':
          handleNext();
          break;
        case 'Escape':
          onClose();
          break;
        case '+':
        case '=':
          handleZoomIn();
          break;
        case '-':
          handleZoomOut();
          break;
        default:
          break;
      }
    };

    window.addEventListener('keydown', handleKeyDown);
    return () => window.removeEventListener('keydown', handleKeyDown);
  }, [isOpen, currentIndex]);

  // 关闭时重置状态
  const handleClose = () => {
    setScale(1);
    setCurrentIndex(initialIndex);
    onClose();
  };

  if (!images || images.length === 0) return null;

  return (
    <Modal isOpen={isOpen} onClose={handleClose} size="full" isCentered>
      <ModalOverlay bg="blackAlpha.900" backdropFilter="blur(10px)" />
      <ModalContent bg="transparent" boxShadow="none" m="0">
        <ModalCloseButton
          size="lg"
          color="white"
          bg="blackAlpha.600"
          _hover={{ bg: 'blackAlpha.800' }}
          zIndex="2"
          top="20px"
          right="20px"
        />

        <ModalBody
          display="flex"
          alignItems="center"
          justifyContent="center"
          position="relative"
          p="0"
        >
          {/* 图片显示区域 */}
          <AnimatePresence mode="wait">
            <MotionBox
              key={currentIndex}
              initial={{ opacity: 0, scale: 0.9 }}
              animate={{ opacity: 1, scale: 1 }}
              exit={{ opacity: 0, scale: 0.9 }}
              transition={{ duration: 0.3 }}
              display="flex"
              alignItems="center"
              justifyContent="center"
              maxH="90vh"
              maxW="90vw"
            >
              <Image
                src={images[currentIndex]}
                alt={`图片 ${currentIndex + 1}`}
                maxH="90vh"
                maxW="90vw"
                objectFit="contain"
                transform={`scale(${scale})`}
                transition="transform 0.3s"
                cursor={scale > 1 ? 'grab' : 'default'}
                userSelect="none"
              />
            </MotionBox>
          </AnimatePresence>

          {/* 左右切换按钮（仅多张图片时显示） */}
          {images.length > 1 && (
            <>
              <IconButton
                icon={<ChevronLeft size={32} />}
                position="absolute"
                left="20px"
                top="50%"
                transform="translateY(-50%)"
                onClick={handlePrevious}
                size="lg"
                borderRadius="full"
                bg="blackAlpha.600"
                color="white"
                _hover={{ bg: 'blackAlpha.800', transform: 'translateY(-50%) scale(1.1)' }}
                _active={{ transform: 'translateY(-50%) scale(0.95)' }}
                aria-label="上一张"
                zIndex="2"
              />

              <IconButton
                icon={<ChevronRight size={32} />}
                position="absolute"
                right="20px"
                top="50%"
                transform="translateY(-50%)"
                onClick={handleNext}
                size="lg"
                borderRadius="full"
                bg="blackAlpha.600"
                color="white"
                _hover={{ bg: 'blackAlpha.800', transform: 'translateY(-50%) scale(1.1)' }}
                _active={{ transform: 'translateY(-50%) scale(0.95)' }}
                aria-label="下一张"
                zIndex="2"
              />
            </>
          )}

          {/* 底部工具栏 */}
          <Box
            position="absolute"
            bottom="30px"
            left="50%"
            transform="translateX(-50%)"
            bg="blackAlpha.700"
            borderRadius="full"
            px="6"
            py="3"
            backdropFilter={GLASS_BLUR.sm}
            zIndex="2"
          >
            <HStack spacing="4">
              {/* 缩放控制 */}
              <HStack spacing="2">
                <IconButton
                  icon={<ZoomOut size={18} />}
                  size="sm"
                  variant="ghost"
                  color="white"
                  onClick={handleZoomOut}
                  isDisabled={scale <= 0.5}
                  _hover={{ bg: 'whiteAlpha.200' }}
                  aria-label="缩小"
                />
                <Text color="white" fontSize="sm" fontWeight="500" minW="60px" textAlign="center">
                  {Math.round(scale * 100)}%
                </Text>
                <IconButton
                  icon={<ZoomIn size={18} />}
                  size="sm"
                  variant="ghost"
                  color="white"
                  onClick={handleZoomIn}
                  isDisabled={scale >= 3}
                  _hover={{ bg: 'whiteAlpha.200' }}
                  aria-label="放大"
                />
              </HStack>

              {/* 下载按钮 */}
              <IconButton
                icon={<Download size={18} />}
                size="sm"
                variant="ghost"
                color="white"
                onClick={handleDownload}
                _hover={{ bg: 'whiteAlpha.200' }}
                aria-label="下载图片"
              />

              {/* 图片计数（仅多张图片时显示） */}
              {images.length > 1 && (
                <Text color="white" fontSize="sm" fontWeight="500">
                  {currentIndex + 1} / {images.length}
                </Text>
              )}
            </HStack>
          </Box>

          {/* 快捷键提示 */}
          <Box
            position="absolute"
            top="80px"
            left="20px"
            bg="blackAlpha.600"
            borderRadius="md"
            px="4"
            py="2"
            backdropFilter={GLASS_BLUR.sm}
          >
            <Text color="whiteAlpha.800" fontSize="xs">
              快捷键: ← → 切换 | + - 缩放 | ESC 关闭
            </Text>
          </Box>
        </ModalBody>
      </ModalContent>
    </Modal>
  );
};

export default ImagePreviewModal;