import React, { useContext, useEffect, useMemo, useState } from 'react';
import { Link, useNavigate, useLocation } from 'react-router-dom';
import { UserContext } from '../context/User';
import { StatusContext } from '../context/Status';
import { useTranslation } from 'react-i18next';

import {
  API,
  getLogo,
  getSystemName,
  isAdmin,
  isMobile,
  showError,
} from '../helpers';
import '../index.css';

import {
  IconCalendarClock, IconChecklistStroked,
  IconComment, IconCommentStroked,
  IconCreditCard,
  IconGift, IconHelpCircle,
  IconHistogram,
  IconHome,
  IconImage,
  IconKey,
  IconLayers,
  IconPriceTag,
  IconSetting,
  IconUser
} from '@douyinfe/semi-icons';
import { Avatar, Dropdown, Layout, Nav, Switch, Divider } from '@douyinfe/semi-ui';
import { setStatusData } from '../helpers/data.js';
import { stringToColor } from '../helpers/render.js';
import { useSetTheme, useTheme } from '../context/Theme/index.js';
import { StyleContext } from '../context/Style/index.js';

// 自定义侧边栏按钮样式
const navItemStyle = {
  borderRadius: '6px',
  margin: '4px 8px',
  transition: 'all 0.3s ease'
};

// 自定义侧边栏按钮悬停样式
const navItemHoverStyle = {
  backgroundColor: 'var(--semi-color-primary-light-default)',
  color: 'var(--semi-color-primary)'
};

// 自定义侧边栏按钮选中样式
const navItemSelectedStyle = {
  backgroundColor: 'var(--semi-color-primary-light-default)',
  color: 'var(--semi-color-primary)',
  fontWeight: '600'
};

// 自定义图标样式
const iconStyle = (itemKey, selectedKeys) => {
  return {
    fontSize: '18px',
    color: selectedKeys.includes(itemKey) ? 'var(--semi-color-primary)' : 'var(--semi-color-text-2)',
    transition: 'all 0.3s ease'
  };
};

const SiderBar = () => {
  const { t } = useTranslation();
  const [styleState, styleDispatch] = useContext(StyleContext);
  const [statusState, statusDispatch] = useContext(StatusContext);
  const defaultIsCollapsed =
    localStorage.getItem('default_collapse_sidebar') === 'true';

  const [selectedKeys, setSelectedKeys] = useState(['home']);
  const [isCollapsed, setIsCollapsed] = useState(defaultIsCollapsed);
  const [chatItems, setChatItems] = useState([]);
  const [openedKeys, setOpenedKeys] = useState([]);
  const theme = useTheme();
  const setTheme = useSetTheme();
  const location = useLocation();

  // 预先计算所有可能的图标样式
  const allItemKeys = useMemo(() => {
    const keys = ['home', 'channel', 'token', 'redemption', 'topup', 'user', 'log', 'midjourney', 
                 'setting', 'about', 'chat', 'detail', 'pricing', 'task', 'playground', 'personal'];
    // 添加聊天项的keys
    for (let i = 0; i < chatItems.length; i++) {
      keys.push('chat' + i);
    }
    return keys;
  }, [chatItems]);

  // 使用useMemo一次性计算所有图标样式
  const iconStyles = useMemo(() => {
    const styles = {};
    allItemKeys.forEach(key => {
      styles[key] = iconStyle(key, selectedKeys);
    });
    return styles;
  }, [allItemKeys, selectedKeys]);

  const routerMap = {
    home: '/',
    channel: '/channel',
    token: '/token',
    redemption: '/redemption',
    topup: '/topup',
    user: '/user',
    log: '/log',
    midjourney: '/midjourney',
    setting: '/setting',
    about: '/about',
    chat: '/chat',
    detail: '/detail',
    pricing: '/pricing',
    task: '/task',
    playground: '/playground',
    personal: '/personal',
  };

  const workspaceItems = useMemo(
    () => [
      {
        text: t('数据看板'),
        itemKey: 'detail',
        to: '/detail',
        icon: <IconCalendarClock />,
        className:
          localStorage.getItem('enable_data_export') === 'true'
            ? ''
            : 'tableHiddle',
      },
      {
        text: t('API令牌'),
        itemKey: 'token',
        to: '/token',
        icon: <IconKey />,
      },
      {
        text: t('使用日志'),
        itemKey: 'log',
        to: '/log',
        icon: <IconHistogram />,
      },
      {
        text: t('绘图日志'),
        itemKey: 'midjourney',
        to: '/midjourney',
        icon: <IconImage />,
        className:
          localStorage.getItem('enable_drawing') === 'true'
            ? ''
            : 'tableHiddle',
      },
      {
        text: t('任务日志'),
        itemKey: 'task',
        to: '/task',
        icon: <IconChecklistStroked />,
        className:
          localStorage.getItem('enable_task') === 'true'
            ? ''
            : 'tableHiddle',
      }
    ],
    [
      localStorage.getItem('enable_data_export'),
      localStorage.getItem('enable_drawing'),
      localStorage.getItem('enable_task'),
      t,
    ],
  );

  const financeItems = useMemo(
    () => [
      {
        text: t('钱包'),
        itemKey: 'topup',
        to: '/topup',
        icon: <IconCreditCard />,
      },
      {
        text: t('个人设置'),
        itemKey: 'personal',
        to: '/personal',
        icon: <IconUser />,
      },
    ],
    [t],
  );

  const adminItems = useMemo(
    () => [
      {
        text: t('渠道'),
        itemKey: 'channel',
        to: '/channel',
        icon: <IconLayers />,
        className: isAdmin() ? '' : 'tableHiddle',
      },
      {
        text: t('兑换码'),
        itemKey: 'redemption',
        to: '/redemption',
        icon: <IconGift />,
        className: isAdmin() ? '' : 'tableHiddle',
      },
      {
        text: t('用户管理'),
        itemKey: 'user',
        to: '/user',
        icon: <IconUser />,
      },
      {
        text: t('系统设置'),
        itemKey: 'setting',
        to: '/setting',
        icon: <IconSetting />,
      },
    ],
    [isAdmin(), t],
  );

  const chatMenuItems = useMemo(
    () => [
      {
        text: 'Playground',
        itemKey: 'playground',
        to: '/playground',
        icon: <IconCommentStroked />,
      },
      {
        text: t('聊天'),
        itemKey: 'chat',
        items: chatItems,
        icon: <IconComment />,
      },
    ],
    [chatItems, t],
  );

  useEffect(() => {
    const currentPath = location.pathname;
    const matchingKey = Object.keys(routerMap).find(key => routerMap[key] === currentPath);
    
    if (matchingKey) {
      setSelectedKeys([matchingKey]);
    } else if (currentPath.startsWith('/chat/')) {
      setSelectedKeys(['chat']);
    }

    let chats = localStorage.getItem('chats');
    if (chats) {
      // console.log(chats);
      try {
        chats = JSON.parse(chats);
        if (Array.isArray(chats)) {
          let chatItems = [];
          for (let i = 0; i < chats.length; i++) {
            let chat = {};
            for (let key in chats[i]) {
              chat.text = key;
              chat.itemKey = 'chat' + i;
              chat.to = '/chat/' + i;
            }
            // setRouterMap({ ...routerMap, chat: '/chat/' + i })
            chatItems.push(chat);
          }
          setChatItems(chatItems);
        }
      } catch (e) {
        console.error(e);
        showError('聊天数据解析失败')
      }
    }

    setIsCollapsed(localStorage.getItem('default_collapse_sidebar') === 'true');
  }, [location.pathname]);

  // Custom divider style
  const dividerStyle = {
    margin: '8px 0',
    opacity: 0.6,
  };

  // Custom group label style
  const groupLabelStyle = {
    padding: '8px 16px',
    color: 'var(--semi-color-text-2)',
    fontSize: '12px',
    fontWeight: 'bold',
    textTransform: 'uppercase',
    letterSpacing: '0.5px',
  };

  return (
    <>
      <Nav
        className="custom-sidebar-nav"
        style={{ 
          width: isCollapsed ? '60px' : '200px',
          height: '100%',
          boxShadow: '0 1px 6px rgba(0, 0, 0, 0.08)',
          borderRight: '1px solid var(--semi-color-border)',
          background: 'var(--semi-color-bg-0)',
          borderRadius: '0 8px 8px 0',
          transition: 'all 0.3s ease',
          position: 'relative',
          zIndex: 95,
          overflowY: 'auto',
          WebkitOverflowScrolling: 'touch' // Improve scrolling on iOS devices
        }}
        defaultIsCollapsed={
          localStorage.getItem('default_collapse_sidebar') === 'true'
        }
        isCollapsed={isCollapsed}
        onCollapseChange={(collapsed) => {
          setIsCollapsed(collapsed);
          localStorage.setItem('default_collapse_sidebar', collapsed);
          // 始终保持侧边栏显示，只是宽度不同
          styleDispatch({ type: 'SET_SIDER', payload: true });
          
          // 确保在收起侧边栏时有选中的项目，避免不必要的计算
          if (selectedKeys.length === 0) {
            const currentPath = location.pathname;
            const matchingKey = Object.keys(routerMap).find(key => routerMap[key] === currentPath);
            
            if (matchingKey) {
              setSelectedKeys([matchingKey]);
            } else if (currentPath.startsWith('/chat/')) {
              setSelectedKeys(['chat']);
            } else {
              setSelectedKeys(['home']); // 默认选中首页
            }
          }
        }}
        selectedKeys={selectedKeys}
        itemStyle={navItemStyle}
        hoverStyle={navItemHoverStyle}
        selectedStyle={navItemSelectedStyle}
        renderWrapper={({ itemElement, isSubNav, isInSubNav, props }) => {
          let chats = localStorage.getItem('chats');
          if (chats) {
            chats = JSON.parse(chats);
            if (Array.isArray(chats) && chats.length > 0) {
              for (let i = 0; i < chats.length; i++) {
                routerMap['chat' + i] = '/chat/' + i;
              }
              if (chats.length > 1) {
                // delete /chat
                if (routerMap['chat']) {
                  delete routerMap['chat'];
                }
              } else {
                // rename /chat to /chat/0
                routerMap['chat'] = '/chat/0';
              }
            }
          }
          return (
            <Link
              style={{ textDecoration: 'none' }}
              to={routerMap[props.itemKey]}
            >
              {itemElement}
            </Link>
          );
        }}
        onSelect={(key) => {
          if (key.itemKey.toString().startsWith('chat')) {
            styleDispatch({ type: 'SET_INNER_PADDING', payload: false });
          } else {
            styleDispatch({ type: 'SET_INNER_PADDING', payload: true });
          }
          
          // 如果点击的是已经展开的子菜单的父项，则收起子菜单
          if (openedKeys.includes(key.itemKey)) {
            setOpenedKeys(openedKeys.filter(k => k !== key.itemKey));
          }
          
          setSelectedKeys([key.itemKey]);
        }}
        openKeys={openedKeys}
        onOpenChange={(data) => {
          setOpenedKeys(data.openKeys);
        }}
      >
        {/* Chat Section - Only show if there are chat items */}
        {chatMenuItems.map((item) => {
          if (item.items && item.items.length > 0) {
            return (
              <Nav.Sub
                key={item.itemKey}
                itemKey={item.itemKey}
                text={item.text}
                icon={React.cloneElement(item.icon, { style: iconStyles[item.itemKey] })}
              >
                {item.items.map((subItem) => (
                  <Nav.Item
                    key={subItem.itemKey}
                    itemKey={subItem.itemKey}
                    text={subItem.text}
                  />
                ))}
              </Nav.Sub>
            );
          } else {
            return (
              <Nav.Item
                key={item.itemKey}
                itemKey={item.itemKey}
                text={item.text}
                icon={React.cloneElement(item.icon, { style: iconStyles[item.itemKey] })}
              />
            );
          }
        })}

        {/* Divider */}
        <Divider style={dividerStyle} />

        {/* Workspace Section */}
        {!isCollapsed && <div style={groupLabelStyle}>{t('控制台')}</div>}
        {workspaceItems.map((item) => (
          <Nav.Item
            key={item.itemKey}
            itemKey={item.itemKey}
            text={item.text}
            icon={React.cloneElement(item.icon, { style: iconStyles[item.itemKey] })}
            className={item.className}
          />
        ))}

        {isAdmin() && (
          <>
            {/* Divider */}
            <Divider style={dividerStyle} />

            {/* Admin Section */}
            {!isCollapsed && <div style={groupLabelStyle}>{t('管理员')}</div>}
            {adminItems.map((item) => (
              <Nav.Item
                key={item.itemKey}
                itemKey={item.itemKey}
                text={item.text}
                icon={React.cloneElement(item.icon, { style: iconStyles[item.itemKey] })}
                className={item.className}
              />
            ))}
          </>
        )}

        {/* Divider */}
        <Divider style={dividerStyle} />

        {/* Finance Management Section */}
        {!isCollapsed && <div style={groupLabelStyle}>{t('个人中心')}</div>}
        {financeItems.map((item) => (
          <Nav.Item
            key={item.itemKey}
            itemKey={item.itemKey}
            text={item.text}
            icon={React.cloneElement(item.icon, { style: iconStyles[item.itemKey] })}
            className={item.className}
          />
        ))}

        <Nav.Footer
          collapseButton={true}
          style={{
            borderTop: '1px solid var(--semi-color-border)',
            padding: '12px 0',
            marginTop: 'auto'
          }}
          collapseText={(collapsed)=>
            {
              if(collapsed){
                return t('展开侧边栏')
              }
                return t('收起侧边栏')
            }
          }
        />
      </Nav>
    </>
  );
};

export default SiderBar;