import { useState, useEffect } from 'react'
import { useNavigate } from 'react-router-dom'
import { Card, Empty, Modal, Form, Input, Row, Col, Space, Button, Switch, message, Select, Table, Tag, Pagination, Progress, Alert, List, Spin, Tooltip } from 'antd'
import { PlusOutlined, FolderOutlined, TeamOutlined, EyeOutlined, CopyOutlined, DeleteOutlined, EditOutlined, FileOutlined, GithubOutlined, CheckOutlined, SwapOutlined, SettingOutlined, DatabaseOutlined, ReloadOutlined, CalendarOutlined, FileTextOutlined, CrownOutlined } from '@ant-design/icons'
import { getMyProjects, getOwnedProjects, getSharedProjects, createProject, deleteProject, updateProject, getProjectMembers, addProjectMember, removeProjectMember, getGitRepos, createGitRepo, updateGitRepo, deleteGitRepo, transferProject } from '@/api/project'
import { getProjectShareInfo, updateProjectShareSettings } from '@/api/share'
import { getUserList } from '@/api/users'
import { searchDocuments } from '@/api/search'
import { getUnreadByProject, markProjectNotificationsRead } from '@/api/notification'
import useNotificationStore from '@/stores/notificationStore'
import ListActionBar from '@/components/ListActionBar/ListActionBar'
import Toast from '@/components/Toast/Toast'
import useProjectKnowledge from './useProjectKnowledge'
import useUserStore from '@/stores/userStore'
import './ProjectList.css'

function ProjectList({ type = 'my' }) {
  const [projects, setProjects] = useState([])
  const [loading, setLoading] = useState(false)
  const [modalVisible, setModalVisible] = useState(false)
  const [editModalVisible, setEditModalVisible] = useState(false)
  const [gitModalVisible, setGitModalVisible] = useState(false)
  const [membersModalVisible, setMembersModalVisible] = useState(false)
  const [currentProject, setCurrentProject] = useState(null)
  const [shareInfo, setShareInfo] = useState(null)
  const [hasPassword, setHasPassword] = useState(false)
  const [password, setPassword] = useState('')
  const [searchKeyword, setSearchKeyword] = useState('')
  const [searchResults, setSearchResults] = useState([])
  const [searching, setSearching] = useState(false)
  const [hasSearched, setHasSearched] = useState(false)
  const [members, setMembers] = useState([])
  const [users, setUsers] = useState([])
  const [loadingMembers, setLoadingMembers] = useState(false)
  const [form] = Form.useForm()
  const [editForm] = Form.useForm()
  const [gitForm] = Form.useForm()
  const [memberForm] = Form.useForm()
  const [transferModalVisible, setTransferModalVisible] = useState(false)
  const [transferForm] = Form.useForm()
  const navigate = useNavigate()
  const { user: currentUser } = useUserStore()
  const [currentPage, setCurrentPage] = useState(1)
  const [unreadByProject, setUnreadByProject] = useState({})
  const pageSize = 8

  // 参与项目角色 -> 显示名称
  const projectRoleLabel = (role) => {
    const roleMap = { admin: '管理者', editor: '编辑者', viewer: '查看者' }
    return roleMap[role] || role || '查看者'
  }

  // 格式化日期
  const formatDate = (dateStr) => {
    if (!dateStr) return ''
    try {
      const d = new Date(dateStr)
      if (Number.isNaN(d.getTime())) return ''
      return d.toLocaleDateString('zh-CN')
    } catch {
      return ''
    }
  }

  // 相对时间（用于“最后更新”）
  const formatRelativeTime = (dateStr) => {
    if (!dateStr) return ''
    const d = new Date(dateStr)
    if (Number.isNaN(d.getTime())) return ''
    const diff = Date.now() - d.getTime()
    if (diff < 60 * 1000) return '刚刚'
    const minutes = Math.floor(diff / (60 * 1000))
    if (minutes < 60) return `${minutes} 分钟前`
    const hours = Math.floor(minutes / 60)
    if (hours < 24) return `${hours} 小时前`
    const days = Math.floor(hours / 24)
    if (days < 30) return `${days} 天前`
    return formatDate(dateStr)
  }

  // 卡片归属用户显示名（我的项目 -> 当前用户；参与项目 -> 项目所有者）
  const cardOwnerName = (project) => {
    if (type === 'my') {
      return currentUser?.nickname || currentUser?.username || '我'
    }
    return project.owner_nickname || project.owner_name || '未知'
  }

  // 卡片归属用户头像首字符
  const cardOwnerInitial = (project) => {
    const name = cardOwnerName(project)
    return (name || '?').charAt(0).toUpperCase()
  }

  // 卡片角色显示名（我的项目 -> 所有者；参与项目 -> 我的角色）
  const cardRoleLabel = (project) => {
    if (type === 'my') return '所有者'
    return projectRoleLabel(project.user_role)
  }

  // 卡片角色徽章样式类
  const cardRoleClass = (project) => {
    if (type === 'my') return 'role-owner'
    const roleMap = { admin: 'role-admin', editor: 'role-editor', viewer: 'role-viewer' }
    return roleMap[project.user_role] || 'role-viewer'
  }

  // 卡片角色徽章图标
  const cardRoleIcon = (project) => {
    if (type === 'my' || project.user_role === 'admin') return <CrownOutlined />
    if (project.user_role === 'editor') return <EditOutlined />
    return <EyeOutlined />
  }

  const {
    kbModalVisible,
    progress,
    currentTask,
    loadingProgress,
    vectorizing,
    openKnowledgeModal,
    closeKnowledgeModal,
    refreshProgress,
    runVectorize,
  } = useProjectKnowledge()

  useEffect(() => {
    fetchProjects()
    setCurrentPage(1)
  }, [type])

  useEffect(() => {
    setCurrentPage(1)
  }, [searchKeyword])

  // ... (fetchProjects code)

  const handleOpenTransfer = async () => {
    setLoadingMembers(true)
    setTransferModalVisible(true)
    try {
      // 获取用户列表 (排除自己)
      const res = await getUserList({ page: 1, page_size: 100, status: 1 })
      const allUsers = res.data || []
      // 过滤掉当前所有者（也就是自己，虽然API也会校验）
      setUsers(allUsers.filter(u => u.id !== currentProject.owner_id))
    } catch (error) {
      message.error('加载用户列表失败')
    } finally {
      setLoadingMembers(false)
    }
  }

  const handleTransfer = async (values) => {
    Modal.confirm({
      title: '确认转移',
      content: '确定要将项目所有权转移给该用户吗？转移后您将变为管理员，无法再删除项目或转移所有权。',
      okText: '确认转移',
      okType: 'danger',
      onOk: async () => {
        try {
          await transferProject(currentProject.id, values.new_owner_id)
          message.success('项目所有权已转移')
          setTransferModalVisible(false)
          setEditModalVisible(false)
          transferForm.resetFields()
          fetchProjects()
        } catch (error) {
          console.error('Transfer error:', error)
          message.error('转移失败: ' + (error.response?.data?.detail || error.message))
        }
      }
    })
  }

  const fetchProjects = async () => {
    setLoading(true)
    try {
      let res
      if (type === 'my') {
        res = await getOwnedProjects()
      } else if (type === 'share') {
        res = await getSharedProjects()
      } else {
        res = await getMyProjects()
      }
      setProjects(res.data || [])
      // 参与项目：加载每个项目的未读更新通知数（与消息通知保持一致）
      if (type === 'share') {
        getUnreadByProject()
          .then((unreadRes) => setUnreadByProject(unreadRes.data?.unread_by_project || {}))
          .catch(() => setUnreadByProject({}))
      } else {
        setUnreadByProject({})
      }
    } catch (error) {
      console.error('Fetch projects error:', error)
    } finally {
      setLoading(false)
    }
  }

  const handleCreateProject = async (values) => {
    try {
      await createProject(values)
      Toast.success('创建成功', '项目已创建')
      setModalVisible(false)
      form.resetFields()
      fetchProjects()
    } catch (error) {
      console.error('Create project error:', error)
    }
  }

  const handleDeleteProject = async (projectId) => {
    Modal.confirm({
      title: '确认删除',
      content: '确定要删除这个项目吗？如果项目中存在文件，将无法删除。删除后将无法恢复！',
      okText: '确定删除',
      okType: 'danger',
      cancelText: '取消',
      onOk: async () => {
        try {
          await deleteProject(projectId)
          Toast.success('删除成功', '项目已删除')
          fetchProjects()
        } catch (error) {
          console.error('Delete project error:', error)
          const errorMsg = error.response?.data?.detail || error.message || '删除失败'
          Toast.error('删除失败', errorMsg)
        }
      },
    })
  }

  // 打开编辑项目
  const handleEdit = (e, project) => {
    e.stopPropagation()
    setCurrentProject(project)
    editForm.setFieldsValue({
      name: project.name,
      description: project.description,
    })
    setShareInfo(null)
    setHasPassword(false)
    setPassword('')
    setEditModalVisible(true)
  }

  // 切换公开/私有（立即生效）
  const handlePublicToggle = async (checked) => {
    if (!currentProject) return
    try {
      const res = await updateProject(currentProject.id, {
        is_public: checked ? 1 : 0,
      })
      const updatedProject = res.data || {
        ...currentProject,
        is_public: checked ? 1 : 0,
      }
      setCurrentProject(updatedProject)
      message.success(checked ? '项目已设为公开' : '项目已设为私有')
      await fetchProjects()

      if (checked) {
        const shareRes = await getProjectShareInfo(currentProject.id)
        setShareInfo(shareRes.data)
        setHasPassword(shareRes.data.has_password)
        setPassword(shareRes.data.access_pass || '')
      } else {
        setShareInfo({ enabled: false, share_url: null, has_password: false, access_pass: null })
        setHasPassword(false)
        setPassword('')
      }
    } catch (error) {
      console.error('Toggle public error:', error)
      message.error('操作失败')
    }
  }

  // 更新项目（仅名称和描述）
  const handleUpdateProject = async (values) => {
    try {
      const res = await updateProject(currentProject.id, {
        name: values.name,
        description: values.description,
      })
      const updatedProject = res.data || {
        ...currentProject,
        ...values,
      }
      setCurrentProject(updatedProject)
      message.success('项目更新成功')
      await fetchProjects()
      setEditModalVisible(false)
      editForm.resetFields()
    } catch (error) {
      console.error('Update project error:', error)
      message.error('项目更新失败')
    }
  }

  useEffect(() => {
    if (!editModalVisible || !currentProject) return

    if (currentProject.is_public !== 1) {
      setShareInfo({ enabled: false, share_url: null, has_password: false, access_pass: null })
      setHasPassword(false)
      setPassword('')
      return
    }

    ;(async () => {
      try {
        const res = await getProjectShareInfo(currentProject.id)
        setShareInfo(res.data)
        setHasPassword(res.data.has_password)
        setPassword(res.data.access_pass || '')
      } catch (error) {
        console.error('Get project share info error:', error)
      }
    })()
  }, [editModalVisible, currentProject])

  const [gitRepos, setGitRepos] = useState([])
  const [loadingRepos, setLoadingRepos] = useState(false)
  const [gitRepoModalVisible, setGitRepoModalVisible] = useState(false)
  const [editingRepo, setEditingRepo] = useState(null)
  const [repoForm] = Form.useForm()

  // 打开Git设置（仓库列表）
  const handleGitSettings = (e, project) => {
    e.stopPropagation()
    setCurrentProject(project)
    setGitModalVisible(true)
    fetchGitRepos(project.id)
  }

  // 打开知识库（向量化进度）弹窗
  const handleKnowledge = (e, project) => {
    e.stopPropagation()
    setCurrentProject(project)
    openKnowledgeModal(project)
  }

  // 加载Git仓库列表
  const fetchGitRepos = async (projectId) => {
    setLoadingRepos(true)
    try {
      const res = await getGitRepos(projectId)
      setGitRepos(res.data || [])
    } catch (error) {
      console.error('Fetch git repos error:', error)
      message.error('加载Git仓库失败')
    } finally {
      setLoadingRepos(false)
    }
  }

  // 打开添加仓库弹窗
  const handleAddRepo = () => {
    setEditingRepo(null)
    repoForm.resetFields()
    // 如果是第一个仓库，默认设为默认
    if (gitRepos.length === 0) {
      repoForm.setFieldsValue({ is_default: 1 })
    }
    setGitRepoModalVisible(true)
  }

  // 打开编辑仓库弹窗
  const handleEditRepo = (repo) => {
    setEditingRepo(repo)
    repoForm.setFieldsValue({
      ...repo,
      is_default: repo.is_default === 1,
    })
    setGitRepoModalVisible(true)
  }

  // 删除仓库
  const handleDeleteRepo = (repoId) => {
    Modal.confirm({
      title: '确认删除',
      content: '确定要删除这个Git仓库配置吗？',
      onOk: async () => {
        try {
          await deleteGitRepo(currentProject.id, repoId)
          message.success('删除成功')
          fetchGitRepos(currentProject.id)
        } catch (error) {
          console.error('Delete repo error:', error)
          message.error('删除失败')
        }
      },
    })
  }

  // 保存仓库（新增/更新）
  const handleSaveRepo = async (values) => {
    try {
      const data = {
        ...values,
        is_default: values.is_default ? 1 : 0,
      }
      
      if (editingRepo) {
        await updateGitRepo(currentProject.id, editingRepo.id, data)
        message.success('更新成功')
      } else {
        await createGitRepo(currentProject.id, data)
        message.success('添加成功')
      }
      
      setGitRepoModalVisible(false)
      fetchGitRepos(currentProject.id)
    } catch (error) {
      console.error('Save repo error:', error)
      message.error(editingRepo ? '更新失败' : '添加失败')
    }
  }

  const handleOpenProject = (projectId) => {
    // 打开参与项目时，将其未读更新通知标记为已读（与消息通知联动）
    if (type === 'share' && unreadByProject[projectId]) {
      markProjectNotificationsRead(projectId)
        .then(() => {
          setUnreadByProject((prev) => {
            if (!prev[projectId]) return prev
            const next = { ...prev }
            delete next[projectId]
            return next
          })
          useNotificationStore.getState().fetchUnreadCount()
        })
        .catch(() => {})
    }
    navigate(`/projects/${projectId}/docs`)
  }

  // 复制分享链接
  const handleCopyLink = async () => {
    if (!shareInfo) return
    const fullUrl = `${window.location.origin}${shareInfo.share_url}`
    
    try {
      if (navigator.clipboard && window.isSecureContext) {
        await navigator.clipboard.writeText(fullUrl)
        Toast.success('复制成功', '分享链接已复制到剪贴板')
      } else {
        // Fallback for non-secure contexts or older browsers
        const textArea = document.createElement("textarea")
        textArea.value = fullUrl
        textArea.style.position = "fixed"
        textArea.style.left = "-9999px"
        textArea.style.top = "0"
        document.body.appendChild(textArea)
        textArea.focus()
        textArea.select()
        const successful = document.execCommand('copy')
        document.body.removeChild(textArea)
        if (successful) {
           Toast.success('复制成功', '分享链接已复制到剪贴板')
        } else {
           Toast.error('复制失败', '请手动复制链接')
        }
      }
    } catch (err) {
      console.error('Failed to copy:', err)
      Toast.error('复制失败', '无法访问剪贴板')
    }
  }

  // 切换密码保护
  const handlePasswordToggle = async (checked) => {
    if (!checked) {
      try {
        await updateProjectShareSettings(currentProject.id, { access_pass: null })
        setHasPassword(false)
        setPassword('')
        message.success('已取消访问密码')
        const res = await getProjectShareInfo(currentProject.id)
        setShareInfo(res.data)
      } catch (error) {
        console.error('Update settings error:', error)
        message.error('操作失败')
      }
    } else {
      setHasPassword(true)
    }
  }

  // 保存密码
  const handleSavePassword = async () => {
    if (!password.trim()) {
      message.warning('请输入访问密码')
      return
    }
    try {
      await updateProjectShareSettings(currentProject.id, { access_pass: password })
      message.success('访问密码已设置')
      const res = await getProjectShareInfo(currentProject.id)
      setShareInfo(res.data)
      setHasPassword(true)
    } catch (error) {
      console.error('Save password error:', error)
      message.error('设置密码失败')
    }
  }

  // 打开成员管理
  const handleMembers = async (e, project) => {
    e.stopPropagation()
    setCurrentProject(project)
    setMembersModalVisible(true)
    setLoadingMembers(true)

    try {
      // 并行加载成员列表和用户列表（只获取普通用户 role_id=3）
      const [membersRes, usersRes] = await Promise.all([
        getProjectMembers(project.id),
        getUserList({ page: 1, page_size: 100, status: 1, role_id: 3 })
      ])

      console.log('Members Response:', membersRes)
      console.log('Users Response:', usersRes)

      const membersData = membersRes.data || []
      // 后端返回格式: { code: 200, message: "success", data: [...], total, page, page_size }
      const usersData = Array.isArray(usersRes.data) ? usersRes.data : []

      console.log('Setting members:', membersData)
      console.log('Setting users:', usersData)

      setMembers(membersData)
      setUsers(usersData)
    } catch (error) {
      console.error('Get members error:', error)
      console.error('Error details:', error.response)
      message.error('获取数据失败: ' + (error.response?.data?.detail || error.message))
    } finally {
      setLoadingMembers(false)
    }
  }

  // 添加成员
  const handleAddMember = async (values) => {
    try {
      await addProjectMember(currentProject.id, values)
      message.success('成员添加成功')
      memberForm.resetFields()
      // 刷新成员列表（带用户名信息）
      const res = await getProjectMembers(currentProject.id)
      setMembers(res.data || [])
    } catch (error) {
      console.error('Add member error:', error)
      const errorMsg = error.response?.data?.detail || error.message || '添加成员失败'
      message.error(errorMsg)
    }
  }

  // 删除成员
  const handleRemoveMember = async (userId) => {
    Modal.confirm({
      title: '确认删除',
      content: '确定要删除这个成员吗？',
      onOk: async () => {
        try {
          await removeProjectMember(currentProject.id, userId)
          message.success('成员删除成功')
          // 刷新成员列表（带用户名信息）
          const res = await getProjectMembers(currentProject.id)
          setMembers(res.data || [])
        } catch (error) {
          console.error('Remove member error:', error)
          const errorMsg = error.response?.data?.detail || error.message || '删除成员失败'
          message.error(errorMsg)
        }
      },
    })
  }

  // 处理搜索输入变化
  const handleSearchChange = (value) => {
    setSearchKeyword(value)
    // 如果清空了输入框，重置搜索状态
    if (!value || !value.trim()) {
      setSearchResults([])
      setHasSearched(false)
    }
  }

  // 处理搜索
  const handleSearch = async (keyword) => {
    setSearchKeyword(keyword)

    if (!keyword || !keyword.trim()) {
      // 清空搜索，显示所有项目
      setSearchResults([])
      setSearching(false)
      setHasSearched(false)
      return
    }

    setSearching(true)
    setHasSearched(true)
    try {
      const res = await searchDocuments(keyword.trim())
      setSearchResults(res.data || [])
    } catch (error) {
      console.error('Search error:', error)
      Toast.error('搜索失败', error.response?.data?.detail || error.message)
    } finally {
      setSearching(false)
    }
  }

  // 处理搜索结果点击
  const handleSearchResultClick = (item) => {
    if (item.type === 'project') {
      // 跳转到项目文档页
      navigate(`/projects/${item.project_id}/docs`)
    } else if (item.type === 'file') {
      // 跳转到文件
      navigate(`/projects/${item.project_id}/docs?file=${encodeURIComponent(item.file_path)}&keyword=${encodeURIComponent(searchKeyword)}`)
    }
  }

  // 过滤项目（仅在未使用全局搜索时进行本地过滤）
  const filteredProjects = !hasSearched && searchKeyword
    ? projects.filter((project) =>
      project.name.toLowerCase().includes(searchKeyword.toLowerCase()) ||
      (project.description && project.description.toLowerCase().includes(searchKeyword.toLowerCase()))
    )
    : projects

  const paginatedProjects = filteredProjects.slice((currentPage - 1) * pageSize, currentPage * pageSize)

  return (
    <div className="project-list-container">
      <ListActionBar
        actions={type === 'my' ? [
          {
            key: 'create',
            label: '创建项目',
            type: 'primary',
            icon: <PlusOutlined />,
            onClick: () => setModalVisible(true),
          },
        ] : []}
        search={{
          placeholder: '搜索项目或文件...',
          value: searchKeyword,
          onChange: handleSearchChange,
          onSearch: handleSearch,
        }}
        showRefresh
        onRefresh={fetchProjects}
      />

      {/* 搜索结果 */}
      {hasSearched && searchResults.length > 0 && (
        <div style={{ marginTop: 16, marginBottom: 16 }}>
          <div style={{ marginBottom: 8, color: 'var(--text-color-secondary)' }}>
            找到 {searchResults.length} 个结果
          </div>
          <Row gutter={[16, 16]}>
            {searchResults.map((item, index) => (
              <Col xs={24} sm={12} md={8} lg={6} key={`${item.type}-${item.project_id}-${index}`}>
                <Card
                  hoverable
                  className="project-card"
                  onClick={() => handleSearchResultClick(item)}
                >
                  <div className="project-card-icon">
                    {item.type === 'project' ? (
                      <FolderOutlined style={{ fontSize: 48, color: '#1890ff' }} />
                    ) : (
                      <FileOutlined style={{ fontSize: 48, color: '#52c41a' }} />
                    )}
                  </div>
                  <Space direction="vertical" style={{ width: '100%' }}>
                    <Space>
                      <h3 style={{ margin: 0 }}>
                        {item.type === 'project' ? item.project_name : item.file_name}
                      </h3>
                      <Tag color={item.type === 'project' ? 'blue' : 'green'}>
                        {item.match_type}
                      </Tag>
                    </Space>
                    {item.type === 'project' && (
                      <p className="project-description">
                        {item.project_description || '暂无描述'}
                      </p>
                    )}
                    {item.type === 'file' && (
                      <div style={{ fontSize: 12, color: 'var(--text-color-secondary)' }}>
                        <div>项目: {item.project_name}</div>
                        <div>路径: {item.file_path}</div>
                      </div>
                    )}
                  </Space>
                </Card>
              </Col>
            ))}
          </Row>
        </div>
      )}

      {/* 正常项目列表 */}
      {!hasSearched && (
        <>
          <Row gutter={[16, 16]} style={{ marginTop: 16 }}>
            {paginatedProjects.map((project) => (
              <Col xs={24} sm={12} md={8} lg={6} key={project.id}>
                <Card
                  hoverable
                  className={type === 'share' ? 'project-card project-card-share' : 'project-card project-card-my'}
                  onClick={() => handleOpenProject(project.id)}
                  actions={type === 'my' ? [
                    <Tooltip key="settings" title="项目设置"><SettingOutlined onClick={(e) => handleEdit(e, project)} /></Tooltip>,
                    <Tooltip key="git" title="Git 仓库"><GithubOutlined onClick={(e) => handleGitSettings(e, project)} /></Tooltip>,
                    <Tooltip key="kb" title="知识库向量化"><DatabaseOutlined onClick={(e) => handleKnowledge(e, project)} /></Tooltip>,
                    <Tooltip key="members" title="成员管理"><TeamOutlined onClick={(e) => handleMembers(e, project)} /></Tooltip>,
                  ] : [
                    <Tooltip key="view" title="进入项目"><EyeOutlined /></Tooltip>,
                  ]}
                >
                  {/* 公开项目标识（仅我的项目显示，参与项目不显示） */}
                  {type === 'my' && project.is_public === 1 && (
                    <div className="project-card-public-badge">公开</div>
                  )}
                  {/* 参与项目：右上角显示未读更新通知数（打开项目后已读） */}
                  {type === 'share' && (unreadByProject[project.id] || 0) > 0 && (
                    <div
                      className="project-card-update-badge"
                      title={`${unreadByProject[project.id]} 条项目更新通知`}
                    >
                      {unreadByProject[project.id] > 99 ? '99+' : unreadByProject[project.id]}
                    </div>
                  )}

                  {/* 统一的卡片骨架：标题 + 描述（主要信息）+ 底部统计/归属/角色 */}
                  <div className="project-card-body">
                    <div className="project-card-title-row">
                      <span className={`project-card-title-icon ${type === 'my' ? 'is-owner' : 'is-shared'}`}>
                        {type === 'my' ? <FolderOutlined /> : <TeamOutlined />}
                      </span>
                      <h3 title={project.name}>{project.name}</h3>
                    </div>
                    <p className="project-description">{project.description || '暂无描述'}</p>
                    {/* 归属人信息 + 项目信息：单行展示 */}
                    <div className="project-card-meta">
                      {type === 'my' ? (
                        <>
                          <span className="project-stat-item" title="文档数量">
                            <FileTextOutlined /> {project.doc_count || 0} 文档
                          </span>
                          <span className="project-stat-item" title="最后更新时间">
                            <CalendarOutlined /> {formatRelativeTime(project.last_activity_at) || formatDate(project.created_at) || '—'}
                          </span>
                          <span className="project-stat-item" title="项目参与人数量">
                            <TeamOutlined /> {project.member_count ?? 0} 人参与
                          </span>
                        </>
                      ) : (
                        <>
                          <span className="project-stat-item" title="文档数量">
                            <FileTextOutlined /> {project.doc_count || 0} 文档
                          </span>
                          <span className="project-card-owner" title={cardOwnerName(project)}>
                            <span className="project-card-owner-avatar">{cardOwnerInitial(project)}</span>
                            <span className="project-card-owner-name">{cardOwnerName(project)}</span>
                          </span>
                          <span className={`project-card-role-badge ${cardRoleClass(project)}`} title={cardRoleLabel(project)}>
                            {cardRoleIcon(project)}
                            {cardRoleLabel(project)}
                          </span>
                        </>
                      )}
                    </div>
                  </div>
                </Card>
              </Col>
            ))}

            {filteredProjects.length === 0 && !loading && (
              <Col span={24}>
                <Empty description={type === 'my' ? "还没有项目，创建一个开始吧" : "还没有参与的项目"} />
              </Col>
            )}
          </Row>
          {filteredProjects.length > 0 && (
            <div style={{ marginTop: 24, display: 'flex', justifyContent: 'center' }}>
              <Pagination
                current={currentPage}
                pageSize={pageSize}
                total={filteredProjects.length}
                onChange={setCurrentPage}
                showSizeChanger={false}
                className="dot-pagination"
                itemRender={(page, type, originalElement) => {
                  if (type === 'page') {
                    return <span className="pagination-dot" />
                  }
                  return originalElement
                }}
              />
            </div>
          )}
        </>
      )}

      {/* 搜索无结果提示 */}
      {hasSearched && !searching && searchResults.length === 0 && (
        <div style={{ marginTop: 16 }}>
          <Empty description={`没有找到包含 "${searchKeyword}" 的项目或文件`} />
        </div>
      )}

      <Modal
        title="创建新项目"
        open={modalVisible}
        onCancel={() => {
          setModalVisible(false)
          form.resetFields()
        }}
        footer={null}
      >
        <Form
          form={form}
          layout="vertical"
          onFinish={handleCreateProject}
        >
          <Form.Item
            label="项目名称"
            name="name"
            rules={[{ required: true, message: '请输入项目名称' }]}
          >
            <Input placeholder="请输入项目名称" />
          </Form.Item>

          <Form.Item
            label="项目描述"
            name="description"
          >
            <Input.TextArea
              rows={4}
              placeholder="请输入项目描述（选填）"
            />
          </Form.Item>

          <Form.Item>
            <Space>
              <Button type="primary" htmlType="submit">
                创建
              </Button>
              <Button onClick={() => {
                setModalVisible(false)
                form.resetFields()
              }}>
                取消
              </Button>
            </Space>
          </Form.Item>
        </Form>
      </Modal>

      <Modal
        title="编辑项目"
        open={editModalVisible}
        onCancel={() => {
          setEditModalVisible(false)
          editForm.resetFields()
        }}
        footer={null}
      >
        <Form
          form={editForm}
          layout="vertical"
          onFinish={handleUpdateProject}
        >
          <Form.Item
            label="项目名称"
            name="name"
            rules={[{ required: true, message: '请输入项目名称' }]}
          >
            <Input placeholder="请输入项目名称" />
          </Form.Item>

          <Form.Item
            label="项目描述"
            name="description"
          >
            <Input.TextArea
              rows={4}
              placeholder="请输入项目描述（选填）"
            />
          </Form.Item>

          <Form.Item label="公开项目">
            <Switch
              checked={currentProject?.is_public === 1}
              onChange={handlePublicToggle}
            />
          </Form.Item>

          <Form.Item label="项目公开分享">
            <Space direction="vertical" style={{ width: '100%' }} size="middle">
              {currentProject?.is_public !== 1 ? (
                <div style={{ color: 'var(--text-color-secondary)', lineHeight: 1.7 }}>
                  开启“公开项目”后，可以生成项目分享链接和访问密码。
                </div>
              ) : shareInfo ? (
                <>
                  <Input
                    value={shareInfo?.share_url ? `${window.location.origin}${shareInfo.share_url}` : '正在生成分享链接...'}
                    readOnly
                    addonAfter={
                      shareInfo?.share_url ? <CopyOutlined onClick={handleCopyLink} style={{ cursor: 'pointer' }} /> : null
                    }
                  />
                  <Space>
                    <span style={{ fontWeight: 500 }}>访问密码保护</span>
                    <Switch checked={hasPassword} onChange={handlePasswordToggle} />
                  </Space>
                  {hasPassword && (
                    <Space.Compact style={{ width: '100%' }}>
                      <Input.Password
                        placeholder="请输入访问密码"
                        value={password}
                        onChange={(e) => setPassword(e.target.value)}
                      />
                      <Button type="primary" onClick={handleSavePassword}>
                        保存密码
                      </Button>
                    </Space.Compact>
                  )}
                </>
              ) : null}
            </Space>
          </Form.Item>

          <Form.Item>
            <Space style={{ width: '100%', justifyContent: 'space-between' }}>
              <Space>
                <Button
                  danger
                  icon={<DeleteOutlined />}
                  onClick={() => {
                    setEditModalVisible(false)
                    editForm.resetFields()
                    handleDeleteProject(currentProject.id)
                  }}
                >
                  删除项目
                </Button>
                <Button
                  danger
                  icon={<SwapOutlined />}
                  onClick={handleOpenTransfer}
                >
                  转移所有权
                </Button>
              </Space>
              <Space>
                <Button type="primary" htmlType="submit">
                  更新
                </Button>
                <Button onClick={() => {
                  setEditModalVisible(false)
                  editForm.resetFields()
                }}>
                  取消
                </Button>
              </Space>
            </Space>
          </Form.Item>
        </Form>
      </Modal>

      <Modal
        title="转移项目所有权"
        open={transferModalVisible}
        onCancel={() => {
          setTransferModalVisible(false)
          transferForm.resetFields()
        }}
        onOk={() => transferForm.submit()}
        confirmLoading={loadingMembers}
      >
        <Form
          form={transferForm}
          layout="vertical"
          onFinish={handleTransfer}
        >
          <p style={{ color: '#f5222d', marginBottom: 16 }}>
            警告：转移所有权后，您将失去该项目的所有权并变为普通管理员，且无法撤销此操作。
          </p>
          <Form.Item
            name="new_owner_id"
            label="选择新所有者"
            rules={[{ required: true, message: '请选择新所有者' }]}
          >
            <Select
              placeholder="搜索用户"
              showSearch
              loading={loadingMembers}
              filterOption={(input, option) =>
                (option?.label ?? '').toLowerCase().includes(input.toLowerCase())
              }
              options={users.map(user => ({
                value: user.id,
                label: user.nickname ? `${user.username} (${user.nickname})` : user.username,
              }))}
            />
          </Form.Item>
        </Form>
      </Modal>

      <Modal
        title="成员管理"
        open={membersModalVisible}
        onCancel={() => {
          setMembersModalVisible(false)
          memberForm.resetFields()
          setMembers([])
          setUsers([])
        }}
        footer={null}
        width={700}
      >
        <Space direction="vertical" style={{ width: '100%' }} size="large">
          <div>
            {users.length === 0 ? (
              <div style={{ marginBottom: 16, color: 'var(--text-color-secondary)' }}>
                {loadingMembers ? '正在加载用户列表...' : '没有可添加的用户'}
              </div>) : null}
            <Form
              form={memberForm}
              layout="inline"
              onFinish={handleAddMember}
            >
              <Form.Item
                name="user_id"
                rules={[{ required: true, message: '请选择用户' }]}
                style={{ width: 250 }}
              >
                <Select
                  placeholder={users.length > 0 ? "选择用户" : "没有可添加的用户"}
                  showSearch
                  loading={loadingMembers}
                  disabled={users.length === 0}
                  filterOption={(input, option) =>
                    (option?.label ?? '').toLowerCase().includes(input.toLowerCase())
                  }
                  options={users
                    .filter(user => !members.some(m => m.user_id === user.id))
                    .map(user => ({
                      value: user.id,
                      label: user.nickname ? `${user.username} (${user.nickname})` : user.username,
                    }))}
                  notFoundContent={loadingMembers ? "加载中..." : "没有找到用户"}
                />
              </Form.Item>
              <Form.Item
                name="role"
                rules={[{ required: true, message: '请选择角色' }]}
                initialValue="viewer"
                style={{ width: 150 }}
              >
                <Select placeholder="选择角色">
                  <Select.Option value="admin">管理员</Select.Option>
                  <Select.Option value="editor">编辑者</Select.Option>
                  <Select.Option value="viewer">查看者</Select.Option>
                </Select>
              </Form.Item>
              <Form.Item>
                <Button
                  type="primary"
                  htmlType="submit"
                  loading={loadingMembers}
                  disabled={users.length === 0}
                >
                  添加
                </Button>
              </Form.Item>
            </Form>
          </div>

          <div>
            <h4>当前成员</h4>
            {members.length === 0 ? (
              <Empty description="暂无成员" />
            ) : (
              <Table
                dataSource={members}
                rowKey="id"
                pagination={false}
                loading={loadingMembers}
                columns={[
                  {
                    title: '用户',
                    dataIndex: 'username',
                    key: 'username',
                    render: (username, record) => {
                      if (record.nickname) {
                        return `${username} (${record.nickname})`
                      }
                      return username || `用户ID: ${record.user_id}`
                    },
                  },
                  {
                    title: '角色',
                    dataIndex: 'role',
                    key: 'role',
                    render: (role) => {
                      const roleMap = {
                        admin: '管理员',
                        editor: '编辑者',
                        viewer: '查看者',
                      }
                      return roleMap[role] || role
                    },
                  },
                  {
                    title: '加入时间',
                    dataIndex: 'joined_at',
                    key: 'joined_at',
                    render: (time) => time ? new Date(time).toLocaleString('zh-CN') : '-',
                  },
                  {
                    title: '操作',
                    key: 'action',
                    render: (_, record) => {
                      const isOwner = record.user_id === currentProject?.owner_id
                      return (
                        <Button
                          type="link"
                          danger
                          onClick={() => handleRemoveMember(record.user_id)}
                          disabled={isOwner}
                          title={isOwner ? '不能删除项目所有者' : '删除成员'}
                        >
                          {isOwner ? '所有者' : '删除'}
                        </Button>
                      )
                    },
                  },
                ]}
              />
            )}
          </div>
        </Space>
      </Modal>

      <Modal
        title="Git仓库管理"
        open={gitModalVisible}
        onCancel={() => {
          setGitModalVisible(false)
          setGitRepos([])
        }}
        footer={null}
        width={800}
      >
        <div style={{ marginBottom: 16, display: 'flex', justifyContent: 'flex-end' }}>
          <Button type="primary" icon={<PlusOutlined />} onClick={handleAddRepo}>
            添加仓库
          </Button>
        </div>
        
        <Table
          dataSource={gitRepos}
          rowKey="id"
          loading={loadingRepos}
          pagination={false}
          columns={[
            {
              title: '别名',
              dataIndex: 'name',
              key: 'name',
              render: (text, record) => (
                <Space>
                  {text}
                  {record.is_default === 1 && <Tag color="blue">默认</Tag>}
                </Space>
              )
            },
            {
              title: '仓库地址',
              dataIndex: 'repo_url',
              key: 'repo_url',
              ellipsis: true,
            },
            {
              title: '分支',
              dataIndex: 'branch',
              key: 'branch',
              width: 100,
            },
            {
              title: '操作',
              key: 'action',
              width: 150,
              render: (_, record) => (
                <Space>
                  <Button type="link" size="small" icon={<EditOutlined />} onClick={() => handleEditRepo(record)}>编辑</Button>
                  <Button type="link" danger size="small" icon={<DeleteOutlined />} onClick={() => handleDeleteRepo(record.id)}>删除</Button>
                </Space>
              ),
            },
          ]}
        />
      </Modal>

      <Modal
        title={editingRepo ? "编辑仓库" : "添加仓库"}
        open={gitRepoModalVisible}
        onCancel={() => {
          setGitRepoModalVisible(false)
          repoForm.resetFields()
        }}
        footer={null}
      >
        <Form
          form={repoForm}
          layout="vertical"
          onFinish={handleSaveRepo}
        >
          <Form.Item
            label="仓库别名"
            name="name"
            rules={[{ required: true, message: '请输入别名（如：Origin, Backup）' }]}
          >
            <Input placeholder="例如：Origin" />
          </Form.Item>

          <Form.Item
            label="Git仓库地址"
            name="repo_url"
            rules={[{ required: true, message: '请输入Git仓库地址' }, { type: 'url', message: '请输入有效的URL' }]}
            extra="支持 HTTPS 协议"
          >
            <Input placeholder="https://github.com/username/repo.git" prefix={<GithubOutlined />} />
          </Form.Item>

          <Form.Item
            label="分支"
            name="branch"
            initialValue="main"
          >
            <Input placeholder="main" />
          </Form.Item>

          <Form.Item
            label="用户名"
            name="username"
            extra="私有仓库需填写"
          >
            <Input placeholder="Git用户名" />
          </Form.Item>

          <Form.Item
            label="Token/密码"
            name="token"
            extra="推荐使用 Personal Access Token"
          >
            <Input.Password placeholder="Git访问令牌" />
          </Form.Item>

          <Form.Item
            name="is_default"
            valuePropName="checked"
          >
            <Switch checkedChildren="默认仓库" unCheckedChildren="非默认" />
          </Form.Item>

          <Form.Item>
            <Space style={{ width: '100%', justifyContent: 'flex-end' }}>
              <Button onClick={() => setGitRepoModalVisible(false)}>取消</Button>
              <Button type="primary" htmlType="submit">保存</Button>
            </Space>
          </Form.Item>
        </Form>
      </Modal>

      {/* 知识库向量化弹窗 */}
      <Modal
        title={`知识库 - ${currentProject?.name || ''}`}
        open={kbModalVisible}
        onCancel={closeKnowledgeModal}
        width={640}
        footer={[
          <Button key="refresh" icon={<ReloadOutlined />} onClick={() => refreshProgress(currentProject?.id)} disabled={vectorizing || loadingProgress}>
            刷新
          </Button>,
          <Button key="close" onClick={closeKnowledgeModal}>关闭</Button>,
          <Button
            key="incremental"
            type="primary"
            loading={vectorizing}
            disabled={vectorizing || !progress?.embedding_ready}
            onClick={() => runVectorize(currentProject?.id, { force: false })}
          >
            增量向量化
          </Button>,
          <Button
            key="full"
            danger
            loading={vectorizing}
            disabled={vectorizing || !progress?.embedding_ready}
            onClick={() => runVectorize(currentProject?.id, { force: true })}
          >
            全量向量化
          </Button>,
        ]}
      >
        {loadingProgress && !progress ? (
          <div style={{ textAlign: 'center', padding: '32px 0', color: 'var(--text-color-secondary)' }}>
            加载向量化进度...
          </div>
        ) : !progress ? (
          <Empty description="暂无数据" />
        ) : (
          <div>
            {!progress.embedding_ready && (
              <div className="kb-warning-banner">
                尚未配置可用的向量模型（Embedding），请先到「模型配置 - 向量模型」中添加并启用，再进行向量化。
              </div>
            )}

            {currentTask && (
              <Alert
                style={{ marginBottom: 16 }}
                type={currentTask.status === 'failed' ? 'error' : currentTask.status === 'success' ? 'success' : 'info'}
                showIcon
                message={
                  `最近任务：${currentTask.task_type === 'full' ? '全量向量化' : '增量向量化'} · ` +
                  `${currentTask.status === 'pending' ? '等待执行' : currentTask.status === 'running' ? '后台执行中' : currentTask.status === 'success' ? '已完成' : '执行失败'}`
                }
                description={
                  currentTask.status === 'failed'
                    ? (currentTask.error_message || '任务执行失败')
                    : `处理 ${currentTask.processed || 0} 个，跳过 ${currentTask.skipped || 0} 个，失败 ${currentTask.failed || 0} 个`
                }
              />
            )}

            <Progress
              percent={progress.percent}
              status={progress.failed > 0 ? 'exception' : (progress.pending > 0 ? 'active' : 'success')}
            />

            <Row gutter={16} style={{ marginTop: 16, textAlign: 'center' }}>
              <Col span={6}>
                <div style={{ fontSize: 22, fontWeight: 600 }}>{progress.total}</div>
                <div style={{ color: 'var(--text-color-secondary)', fontSize: 12 }}>MD 文件总数</div>
              </Col>
              <Col span={6}>
                <div style={{ fontSize: 22, fontWeight: 600, color: '#52c41a' }}>{progress.success}</div>
                <div style={{ color: 'var(--text-color-secondary)', fontSize: 12 }}>已向量化</div>
              </Col>
              <Col span={6}>
                <div style={{ fontSize: 22, fontWeight: 600, color: '#faad14' }}>{progress.pending}</div>
                <div style={{ color: 'var(--text-color-secondary)', fontSize: 12 }}>待处理</div>
              </Col>
              <Col span={6}>
                <div style={{ fontSize: 22, fontWeight: 600, color: '#ff4d4f' }}>{progress.failed}</div>
                <div style={{ color: 'var(--text-color-secondary)', fontSize: 12 }}>失败</div>
              </Col>
            </Row>

            {progress.failed_items?.length > 0 && (
              <div style={{ marginTop: 20 }}>
                <div style={{ marginBottom: 8, fontWeight: 600, color: '#ff4d4f' }}>失败明细</div>
                <div style={{ maxHeight: 160, overflow: 'auto' }}>
                  {progress.failed_items.map((item) => (
                    <div key={item.file_path} style={{ padding: '6px 0', borderBottom: '1px solid var(--border-color)', fontSize: 13 }}>
                      <div style={{ wordBreak: 'break-all' }}>{item.file_path}</div>
                      <div style={{ color: 'var(--text-color-secondary)', fontSize: 12 }}>{item.error}</div>
                    </div>
                  ))}
                </div>
              </div>
            )}

            {progress.pending_items?.length > 0 && (
              <div style={{ marginTop: 20 }}>
                <div style={{ marginBottom: 8, fontWeight: 600, color: '#faad14' }}>待处理文件</div>
                <div style={{ maxHeight: 140, overflow: 'auto' }}>
                  {progress.pending_items.map((path) => (
                    <div key={path} style={{ padding: '4px 0', fontSize: 13, wordBreak: 'break-all', color: 'var(--text-color-secondary)' }}>
                      {path}
                    </div>
                  ))}
                </div>
              </div>
            )}
          </div>
        )}
      </Modal>
    </div>
  )
}

export default ProjectList