// src/views/Community/components/DynamicNewsCard/EventScrollList.js
// 横向滚动事件列表组件

import React, { useRef } from 'react';
import {
  Box,
  Flex,
  Grid,
  IconButton,
  Button,
  ButtonGroup,
  Center,
  VStack,
  Spinner,
  Text,
  useColorModeValue
} from '@chakra-ui/react';
import { ChevronLeftIcon, ChevronRightIcon } from '@chakra-ui/icons';
import DynamicNewsEventCard from '../EventCard/DynamicNewsEventCard';
import PaginationControl from './PaginationControl';

/**
 * 事件列表组件 - 支持两种展示模式
 * @param {Array} events - 当前页的事件列表（服务端已分页）
 * @param {Object} selectedEvent - 当前选中的事件
 * @param {Function} onEventSelect - 事件选择回调
 * @param {string} borderColor - 边框颜色
 * @param {number} currentPage - 当前页码
 * @param {number} totalPages - 总页数（由服务端返回）
 * @param {Function} onPageChange - 页码改变回调
 * @param {boolean} loading - 加载状态
 * @param {string} mode - 展示模式：'carousel'（单排轮播）| 'grid'（双排网格）
 * @param {Function} onModeChange - 模式切换回调
 * @param {boolean} hasMore - 是否还有更多数据
 * @param {Object} eventFollowStatus - 事件关注状态 { [eventId]: { isFollowing, followerCount } }
 * @param {Function} onToggleFollow - 关注按钮回调
 */
const EventScrollList = ({
  events,
  selectedEvent,
  onEventSelect,
  borderColor,
  currentPage,
  totalPages,
  onPageChange,
  loading = false,
  mode = 'carousel',
  onModeChange,
  hasMore = true,
  eventFollowStatus = {},
  onToggleFollow
}) => {
  const scrollContainerRef = useRef(null);

  // 时间轴样式配置
  const getTimelineBoxStyle = () => {
    return {
      bg: useColorModeValue('gray.50', 'gray.700'),
      borderColor: useColorModeValue('gray.400', 'gray.500'),
      borderWidth: '2px',
      textColor: useColorModeValue('blue.600', 'blue.400'),
      boxShadow: 'sm',
    };
  };

  return (
    <Box>
      {/* 顶部控制栏：模式切换按钮（左）+ 分页控制器（右） */}
      <Flex justify="space-between" align="center" mb={2}>
        {/* 模式切换按钮 */}
        <ButtonGroup size="sm" isAttached>
          <Button
            onClick={() => onModeChange('carousel')}
            colorScheme="blue"
            variant={mode === 'carousel' ? 'solid' : 'outline'}
          >
            单排
          </Button>
          <Button
            onClick={() => onModeChange('grid')}
            colorScheme="blue"
            variant={mode === 'grid' ? 'solid' : 'outline'}
          >
            双排
          </Button>
        </ButtonGroup>

        {/* 分页控制器 */}
        {totalPages > 1 && (
          <PaginationControl
            currentPage={currentPage}
            totalPages={totalPages}
            onPageChange={onPageChange}
          />
        )}
      </Flex>

      {/* 横向滚动区域 */}
      <Box position="relative">

        {/* 左侧翻页按钮 - 上一页 */}
      {currentPage > 1 && (
        <IconButton
          icon={<ChevronLeftIcon boxSize={6} color="blue.500" />}
          position="absolute"
          left="0"
          top="50%"
          transform="translateY(-50%)"
          zIndex={2}
          onClick={() => onPageChange(currentPage - 1)}
          variant="ghost"
          size="md"
          w="40px"
          h="40px"
          minW="40px"
          borderRadius="full"
          bg={useColorModeValue('rgba(255, 255, 255, 0.9)', 'rgba(0, 0, 0, 0.6)')}
          boxShadow="0 2px 8px rgba(0, 0, 0, 0.15)"
          _hover={{
            bg: useColorModeValue('rgba(255, 255, 255, 1)', 'rgba(0, 0, 0, 0.8)'),
            boxShadow: '0 4px 12px rgba(0, 0, 0, 0.2)',
            transform: 'translateY(-50%) scale(1.05)'
          }}
          aria-label="上一页"
          title="上一页"
        />
      )}

      {/* 右侧翻页按钮 - 下一页 */}
      {currentPage < totalPages && hasMore && (
        <IconButton
          icon={<ChevronRightIcon boxSize={6} color="blue.500" />}
          position="absolute"
          right="0"
          top="50%"
          transform="translateY(-50%)"
          zIndex={2}
          onClick={() => onPageChange(currentPage + 1)}
          variant="ghost"
          size="md"
          w="40px"
          h="40px"
          minW="40px"
          borderRadius="full"
          bg={useColorModeValue('rgba(255, 255, 255, 0.9)', 'rgba(0, 0, 0, 0.6)')}
          boxShadow="0 2px 8px rgba(0, 0, 0, 0.15)"
          _hover={{
            bg: useColorModeValue('rgba(255, 255, 255, 1)', 'rgba(0, 0, 0, 0.8)'),
            boxShadow: '0 4px 12px rgba(0, 0, 0, 0.2)',
            transform: 'translateY(-50%) scale(1.05)'
          }}
          isDisabled={currentPage >= totalPages && !hasMore}
          aria-label="下一页"
          title="下一页"
        />
      )}

      {/* 事件卡片容器 */}
      <Box
        ref={scrollContainerRef}
        overflowX={mode === 'carousel' ? 'auto' : 'hidden'}
        overflowY="hidden"
        pt={0}
        pb={4}
        px={2}
        position="relative"
        css={mode === 'carousel' ? {
          '&::-webkit-scrollbar': {
            height: '8px',
          },
          '&::-webkit-scrollbar-track': {
            background: useColorModeValue('#f1f1f1', '#2D3748'),
            borderRadius: '10px',
          },
          '&::-webkit-scrollbar-thumb': {
            background: useColorModeValue('#888', '#4A5568'),
            borderRadius: '10px',
          },
          '&::-webkit-scrollbar-thumb:hover': {
            background: useColorModeValue('#555', '#718096'),
          },
          scrollBehavior: 'smooth',
          WebkitOverflowScrolling: 'touch',
        } : {}}
      >
        {/* 加载遮罩 */}
        {loading && (
          <Center
            position="absolute"
            top={0}
            left={0}
            right={0}
            bottom={0}
            bg={useColorModeValue('whiteAlpha.800', 'blackAlpha.700')}
            backdropFilter="blur(2px)"
            zIndex={10}
            borderRadius="md"
          >
            <VStack>
              <Spinner size="lg" color="blue.500" thickness="3px" />
              <Text fontSize="sm" color={useColorModeValue('gray.600', 'gray.300')}>
                加载中...
              </Text>
            </VStack>
          </Center>
        )}

        {/* 模式1: 单排轮播模式 */}
        {mode === 'carousel' && (
          <Flex gap={4}>
            {events.map((event, index) => (
              <Box
                key={event.id}
                minW="calc((100% - 64px) / 5)"
                maxW="calc((100% - 64px) / 5)"
                flexShrink={0}
              >
                <DynamicNewsEventCard
                  event={event}
                  index={index}
                  isFollowing={eventFollowStatus[event.id]?.isFollowing || false}
                  followerCount={eventFollowStatus[event.id]?.followerCount || event.follower_count || 0}
                  isSelected={selectedEvent?.id === event.id}
                  onEventClick={(clickedEvent) => {
                    onEventSelect(clickedEvent);
                  }}
                  onTitleClick={(e) => {
                    e.preventDefault();
                    e.stopPropagation();
                    onEventSelect(event);
                  }}
                  onToggleFollow={() => onToggleFollow?.(event.id)}
                  timelineStyle={getTimelineBoxStyle()}
                  borderColor={borderColor}
                />
              </Box>
            ))}
          </Flex>
        )}

        {/* 模式2: 双排网格模式 */}
        {mode === 'grid' && (
          <Grid
            templateRows="repeat(2, 1fr)"
            templateColumns="repeat(5, 1fr)"
            gap={4}
            autoFlow="column"
          >
            {events.map((event, index) => (
              <Box key={event.id}>
                <DynamicNewsEventCard
                  event={event}
                  index={index}
                  isFollowing={eventFollowStatus[event.id]?.isFollowing || false}
                  followerCount={eventFollowStatus[event.id]?.followerCount || event.follower_count || 0}
                  isSelected={selectedEvent?.id === event.id}
                  onEventClick={(clickedEvent) => {
                    onEventSelect(clickedEvent);
                  }}
                  onTitleClick={(e) => {
                    e.preventDefault();
                    e.stopPropagation();
                    onEventSelect(event);
                  }}
                  onToggleFollow={() => onToggleFollow?.(event.id)}
                  timelineStyle={getTimelineBoxStyle()}
                  borderColor={borderColor}
                />
              </Box>
            ))}
          </Grid>
        )}
      </Box>
      </Box>
    </Box>
  );
};

export default EventScrollList;