import { Fragment, useMemo, useState, type ReactNode } from 'react'
import { Card } from '@astryxdesign/core/Card'
import { Center } from '@astryxdesign/core/Center'
import { Collapsible, CollapsibleGroup } from '@astryxdesign/core/Collapsible'
import { Divider } from '@astryxdesign/core/Divider'
import { Grid } from '@astryxdesign/core/Grid'
import { Heading } from '@astryxdesign/core/Heading'
import { HStack } from '@astryxdesign/core/HStack'
import { Icon } from '@astryxdesign/core/Icon'
import { Section } from '@astryxdesign/core/Section'
import { Text } from '@astryxdesign/core/Text'
import { TextInput } from '@astryxdesign/core/TextInput'
import { ToggleButton, ToggleButtonGroup } from '@astryxdesign/core/ToggleButton'
import { VStack } from '@astryxdesign/core/VStack'
import {
  Blocks,
  Layers,
  Search,
  SlidersHorizontal,
} from 'lucide-react'
import { Page, PageHeader } from '../components/Page'
import { ASTRYX_COMPONENTS, type AstryxComponentGroup } from '../data/astryxComponents'
import { ActionsDemo } from '../demos/ActionsDemo'
import { ChatDemo } from '../demos/ChatDemo'
import { CommandPaletteDemo } from '../demos/CommandPaletteDemo'
import { DataDemo } from '../demos/DataDemo'
import { DialogsDemo } from '../demos/DialogsDemo'
import { FeedbackDemo } from '../demos/FeedbackDemo'
import { InputsDemo } from '../demos/InputsDemo'
import { LayoutDemo } from '../demos/LayoutDemo'
import { MenusDemo } from '../demos/MenusDemo'
import { NavigationDemo } from '../demos/NavigationDemo'
import { ProvidersDemo } from '../demos/ProvidersDemo'
import { SelectionDemo } from '../demos/SelectionDemo'
import { SelectorsDemo } from '../demos/SelectorsDemo'
import { TypographyDemo } from '../demos/TypographyDemo'

interface DemoDefinition {
  id: string
  group: AstryxComponentGroup
  title: string
  description: string
  preview: ReactNode
  components: string[]
}

const DEMOS: DemoDefinition[] = [
  {
    id: 'actions',
    group: 'base',
    title: '操作与链接',
    description: '按钮、图标按钮、工具栏、切换按钮和链接共享同一套交互状态。',
    preview: <ActionsDemo />,
    components: [
      'Button', 'ButtonGroup', 'IconButton', 'ToggleButton', 'ToggleButtonGroup',
      'SegmentedControl', 'SegmentedControlItem', 'Link', 'Kbd', 'Toolbar', 'Icon',
    ],
  },
  {
    id: 'typography',
    group: 'base',
    title: '文字与内容',
    description: '标题、正文、引用、代码块和分隔线共同建立清晰的内容层级。',
    preview: <TypographyDemo />,
    components: [
      'Text', 'Heading', 'Blockquote', 'Code', 'CodeBlock', 'Markdown', 'Citation',
      'Token', 'Divider', 'VisuallyHidden', 'Timer', 'Timestamp',
    ],
  },
  {
    id: 'layout',
    group: 'base',
    title: '布局与卡片',
    description: '响应式网格、可选卡片和折叠面板组成的真实布局结构。',
    preview: <LayoutDemo />,
    components: [
      'Stack', 'HStack', 'VStack', 'Grid', 'GridSpan', 'Center', 'Section', 'Card',
      'ClickableCard', 'SelectableCard', 'Collapsible', 'CollapsibleGroup',
      'ScrollableArea', 'Layout', 'LayoutHeader', 'LayoutContent', 'LayoutFooter',
      'LayoutPanel', 'Outline', 'OverflowList', 'AspectRatio', 'Thumbnail',
      'Carousel', 'MediaTheme',
    ],
  },
  {
    id: 'data',
    group: 'base',
    title: '列表、表格与头像',
    description: '列表、表格、头像和计数徽标用于呈现结构化数据。',
    preview: <DataDemo />,
    components: [
      'List', 'ListItem', 'Item', 'MetadataList', 'MetadataListItem', 'Table',
      'TableBody', 'TableCell', 'TableFooter', 'TableHeader', 'TableHeaderCell',
      'TableRow', 'TableSelectionToolbar', 'TreeList', 'EmptyState', 'Skeleton',
      'Spinner', 'Avatar', 'AvatarGroup', 'AvatarGroupOverflow', 'AvatarStatusDot',
      'Badge', 'StatusDot', 'NavIcon',
    ],
  },
  {
    id: 'providers',
    group: 'base',
    title: '主题与全局能力',
    description: '主题、链接和国际化 Provider 已经在页面中生效。',
    preview: <ProvidersDemo />,
    components: ['Theme', 'MediaTheme', 'LinkProvider', 'InternationalizationProvider'],
  },
  {
    id: 'feedback',
    group: 'base',
    title: '反馈与状态',
    description: '用横幅、进度、加载指示和骨架屏表达系统状态。',
    preview: <FeedbackDemo />,
    components: ['Banner', 'ProgressBar', 'Spinner', 'Skeleton', 'EmptyState'],
  },
  {
    id: 'navigation',
    group: 'base',
    title: '导航与步骤',
    description: '面包屑、标签页和步骤条帮助用户在层级和流程中定位。',
    preview: <NavigationDemo />,
    components: [
      'AppShell', 'TopNav', 'TopNavHeading', 'TopNavItem', 'TopNavMenu',
      'TopNavMegaMenu', 'TopNavMegaMenuFeaturedCard', 'TopNavMegaMenuItem',
      'SideNav', 'SideNavCollapseButton', 'SideNavHeading', 'SideNavItem',
      'SideNavSection', 'MobileNav', 'Breadcrumbs', 'BreadcrumbItem', 'Pagination',
      'TabList', 'Tab', 'TabMenu', 'Stepper', 'Step',
    ],
  },
  {
    id: 'chat',
    group: 'base',
    title: '聊天消息',
    description: '消息列表、气泡、元数据和时间戳组成的对话界面。',
    preview: <ChatDemo />,
    components: [
      'ChatComposer', 'ChatComposerDrawer', 'ChatComposerInput', 'ChatDictationButton',
      'ChatLayout', 'ChatLayoutScrollButton', 'ChatMessage', 'ChatMessageBubble',
      'ChatMessageList', 'ChatMessageMetadata', 'ChatSendButton', 'ChatSystemMessage',
      'ChatTokenizedText', 'ChatToolCalls',
    ],
  },
  {
    id: 'inputs',
    group: 'form',
    title: '文本输入与校验',
    description: '文本、长文本、开关和保存反馈组成的表单输入场景。',
    preview: <InputsDemo />,
    components: [
      'TextInput', 'TextArea', 'NumberInput', 'InputGroup', 'InputGroupText',
      'Field', 'FieldLabel', 'FieldStatus', 'FormLayout', 'FileInput', 'PowerSearch',
    ],
  },
  {
    id: 'selection',
    group: 'form',
    title: '选择控件',
    description: '复选框、单选框和滑杆展示不同粒度的选择操作。',
    preview: <SelectionDemo />,
    components: [
      'CheckboxInput', 'CheckboxList', 'CheckboxListItem', 'RadioList',
      'RadioListItem', 'Switch', 'Slider',
    ],
  },
  {
    id: 'selectors',
    group: 'form',
    title: '选择器与日期',
    description: '下拉选择、日期输入和更多选择模式集中在同一场景。',
    preview: <SelectorsDemo />,
    components: [
      'Selector', 'SelectorOption', 'MultiSelector', 'ComplexSelector', 'Typeahead',
      'BaseTypeahead', 'TypeaheadItem', 'Tokenizer', 'Calendar', 'DateInput',
      'DateRangeInput', 'DateTimeInput', 'TimeInput',
    ],
  },
  {
    id: 'dialogs',
    group: 'overlay',
    title: '对话框、抽屉与底部面板',
    description: '点击按钮打开真实弹层，体验遮罩、焦点管理和关闭流程。',
    preview: <DialogsDemo />,
    components: [
      'Dialog', 'AlertDialog', 'DialogHeader', 'Drawer', 'DrawerHeader',
      'BottomSheet', 'BottomSheetSwitcher', 'Overlay',
    ],
  },
  {
    id: 'menus',
    group: 'overlay',
    title: '菜单与浮层',
    description: '下拉菜单、上下文菜单、弹出框、提示和悬停卡片。',
    preview: <MenusDemo />,
    components: [
      'DropdownMenu', 'DropdownMenuCheckboxItem', 'DropdownMenuDivider',
      'DropdownMenuGroup', 'DropdownMenuItem', 'DropdownMenuRadioGroup',
      'DropdownMenuRadioItem', 'DropdownMenuSubMenu', 'ContextMenu', 'MoreMenu',
      'Popover', 'Tooltip', 'HoverCard',
    ],
  },
  {
    id: 'command',
    group: 'overlay',
    title: '命令面板与通知',
    description: '命令面板把搜索、分组结果和键盘操作集中在一个浮层里。',
    preview: <CommandPaletteDemo />,
    components: [
      'CommandPalette', 'CommandPaletteEmpty', 'CommandPaletteFooter',
      'CommandPaletteGroup', 'CommandPaletteInput', 'CommandPaletteItem',
      'CommandPaletteList', 'Toast', 'Lightbox',
    ],
  },
]

const GROUPS = [
  {
    id: 'base',
    label: '基础组件',
    icon: Blocks,
    description: '布局、排版、内容、操作、反馈、导航和数据展示等通用构建块。',
  },
  {
    id: 'form',
    label: '表单组件',
    icon: SlidersHorizontal,
    description: '输入、选择、日期、校验和表单布局控件。',
  },
  {
    id: 'overlay',
    label: '弹层组件',
    icon: Layers,
    description: '对话框、抽屉、菜单、浮层、提示和命令面板。',
  },
] as const

type Filter = 'all' | AstryxComponentGroup

const GROUP_COUNTS = GROUPS.reduce(
  (counts, group) => {
    counts[group.id] = ASTRYX_COMPONENTS.filter(
      (component) => component.group === group.id,
    ).length
    return counts
  },
  { base: 0, form: 0, overlay: 0 } as Record<AstryxComponentGroup, number>,
)

function DemoCard({ demo }: { demo: DemoDefinition }) {
  return (
    <Card padding={0}>
      <Section variant="muted" padding={5}>
        {demo.preview}
      </Section>
      <Section variant="transparent" padding={5}>
        <VStack gap={2}>
          <Heading level={3}>{demo.title}</Heading>
          <Text type="body" color="secondary" as="p">
            {demo.description}
          </Text>
          <Text type="supporting" size="sm" maxLines={2}>
            覆盖组件：{demo.components.join('、')}
          </Text>
        </VStack>
      </Section>
    </Card>
  )
}

export function ComponentsPage() {
  const [filter, setFilter] = useState<Filter>('all')
  const [query, setQuery] = useState('')

  const results = useMemo(() => {
    const normalized = query.trim().toLowerCase()

    return DEMOS.filter((demo) => {
      const matchesGroup = filter === 'all' || demo.group === filter
      const matchesQuery =
        normalized.length === 0 ||
        demo.title.toLowerCase().includes(normalized) ||
        demo.description.toLowerCase().includes(normalized) ||
        demo.components.some((name) => name.toLowerCase().includes(normalized))

      return matchesGroup && matchesQuery
    })
  }, [filter, query])

  const sections = GROUPS.map((group) => ({
    ...group,
    demos: results.filter((demo) => demo.group === group.id),
  })).filter((group) => group.demos.length > 0)

  const coveredComponents = new Set(results.flatMap((demo) => demo.components)).size
  const isFiltering = filter !== 'all' || query.trim().length > 0

  return (
    <Page>
      <VStack gap={8}>
        <PageHeader
          eyebrow="实时预览"
          title="组件"
          description={`通过可交互的组合场景展示 Astryx 组件的使用效果。全部 ${ASTRYX_COMPONENTS.length} 个组件按基础、表单和弹层分类整理。`}
        />

        <VStack gap={2}>
          <Text type="supporting" size="sm">
            组件名称与 API 保留 Astryx 原始命名；示例中的操作和内容均可直接体验。
          </Text>
          <HStack gap={3} wrap="wrap">
            <Text type="supporting" size="sm">
              基础组件 {GROUP_COUNTS.base}
            </Text>
            <Text type="supporting" size="sm">
              表单组件 {GROUP_COUNTS.form}
            </Text>
            <Text type="supporting" size="sm">
              弹层组件 {GROUP_COUNTS.overlay}
            </Text>
          </HStack>
        </VStack>

        <Divider />

        <VStack gap={4}>
          <HStack gap={4} wrap="wrap" vAlign="end">
            <TextInput
              label="搜索组件"
              isLabelHidden
              placeholder="搜索组件名或场景"
              value={query}
              onChange={setQuery}
              startIcon={Search}
              size="lg"
              width={360}
            />
            <ToggleButtonGroup
              label="按组件分类筛选"
              value={filter}
              onChange={(value) => setFilter((value as Filter | null) ?? 'all')}
              size="sm">
              <ToggleButton label="全部" value="all" />
              {GROUPS.map((group) => (
                <ToggleButton
                  key={group.id}
                  label={group.label}
                  value={group.id}
                />
              ))}
            </ToggleButtonGroup>
          </HStack>
          <Text type="supporting" size="sm">
            {isFiltering
              ? `${results.length} 个场景，覆盖 ${coveredComponents} 个组件`
              : `${DEMOS.length} 个场景，覆盖 ${coveredComponents} 个组件`}
          </Text>
        </VStack>

        {results.length === 0 ? (
          <Center minHeight={220}>
            <VStack gap={2} hAlign="center">
              <Text type="label">没有找到匹配的场景。</Text>
              <Text type="supporting" color="secondary">
                试试更宽泛的关键词，或切换回「全部」。
              </Text>
            </VStack>
          </Center>
        ) : (
          sections.map((group, index) => (
            <Fragment key={group.id}>
              {index > 0 ? <Divider /> : null}
              <VStack gap={4}>
                <VStack gap={1}>
                  <HStack gap={2} vAlign="center" wrap="wrap">
                    <Icon icon={group.icon} size="md" color="accent" />
                    <Heading level={2}>{group.label}</Heading>
                    <Text type="supporting" size="sm">
                      {group.demos.length} 个场景
                    </Text>
                  </HStack>
                  <Text type="body" color="secondary" as="p">
                    {group.description}
                  </Text>
                </VStack>
                <Grid columns={{ minWidth: 460, max: 2 }} gap={4} align="start">
                  {group.demos.map((demo) => (
                    <DemoCard key={demo.id} demo={demo} />
                  ))}
                </Grid>
              </VStack>
            </Fragment>
          ))
        )}

        <Divider />

        <CollapsibleGroup type="single">
          <Collapsible
            value="all-components"
            trigger={<Text type="label">查看完整组件清单</Text>}>
            <VStack gap={3}>
              {GROUPS.map((group) => (
                <VStack key={group.id} gap={1}>
                  <Text type="label">{group.label}</Text>
                  <Text type="supporting" size="sm">
                    {ASTRYX_COMPONENTS.filter(
                      (component) => component.group === group.id,
                    )
                      .map((component) => component.name)
                      .join('、')}
                  </Text>
                </VStack>
              ))}
            </VStack>
          </Collapsible>
        </CollapsibleGroup>

        <Text type="supporting" size="sm">
          共收录 {ASTRYX_COMPONENTS.length} 个组件，数据来自
          @astryxdesign/core 0.7.2。
        </Text>
      </VStack>
    </Page>
  )
}