Data Display

/**
 * Advanced data table with server-side and client-side data management
 */
const VDataTable: Component;

interface DataTableProps {
  /** Array of data items to display */
  items?: any[];
  /** Array of header configuration objects */
  headers?: DataTableHeader[];
  /** Current page number (1-based) */
  page?: number;
  /** Number of items per page */
  itemsPerPage?: number;
  /** Total number of items for server-side pagination */
  itemsLength?: number;
  /** Array of sort configuration objects */
  sortBy?: DataTableSortItem[];
  /** Whether multiple columns can be sorted */
  multiSort?: boolean;
  /** Item selection strategy */
  selectStrategy?: SelectStrategy;
  /** Array of selected item keys */
  modelValue?: any[];
  /** Search query string for filtering */
  search?: string;
  /** Custom filter function */
  customFilter?: FilterFunction;
  /** Whether to show select checkboxes */
  showSelect?: boolean;
  /** Whether to show expand icons */
  showExpand?: boolean;
  /** Item value key for identification */
  itemValue?: string | ((item: any) => any);
  /** Item title key for display */
  itemTitle?: string | ((item: any) => any);
  /** Return object format for items */
  returnObject?: boolean;
  /** Table density setting */
  density?: 'default' | 'comfortable' | 'compact';
  /** Fixed header while scrolling */
  fixedHeader?: boolean;
  /** Fixed footer while scrolling */
  fixedFooter?: boolean;
  /** Table height for virtual scrolling */
  height?: string | number;
  /** Whether table content is loading */
  loading?: boolean;
  /** Loading text to display */
  loadingText?: string;
  /** Text when no data available */
  noDataText?: string;
  /** Hide default footer */
  hideDefaultFooter?: boolean;
  /** Hide default header */
  hideDefaultHeader?: boolean;
  /** Disable sorting functionality */
  disableSort?: boolean;
  /** Make rows hoverable */
  hover?: boolean;
  /** Custom row props function */
  rowProps?: DataTableRowPropsFunction;
  /** Custom cell props function */
  cellProps?: DataTableCellPropsFunction;
}

interface DataTableHeader {
  /** Unique key for the column */
  key: string;
  /** Column title text */
  title?: string;
  /** Value path for nested objects */
  value?: string;
  /** Column span count */
  colspan?: number;
  /** Row span count */
  rowspan?: number;
  /** Whether column is sortable */
  sortable?: boolean;
  /** Custom sort function */
  sort?: DataTableCompareFunction;
  /** Text alignment */
  align?: 'start' | 'center' | 'end';
  /** Column width */
  width?: string | number;
  /** Minimum column width */
  minWidth?: string | number;
  /** Maximum column width */
  maxWidth?: string | number;
  /** Whether column is fixed */
  fixed?: boolean;
  /** Filter function for this column */
  filter?: FilterFunction;
}

interface DataTableSortItem {
  /** Column key to sort by */
  key: string;
  /** Sort order */
  order?: 'asc' | 'desc';
}

type DataTableCompareFunction<T = any> = (a: T, b: T) => number;
type DataTableRowPropsFunction = (data: { item: any; index: number }) => Record<string, any>;
type DataTableCellPropsFunction = (data: { item: any; column: DataTableHeader; index: number }) => Record<string, any>;

// Events
interface DataTableEvents {
  'update:modelValue': (value: any[]) => void;
  'update:page': (page: number) => void;
  'update:itemsPerPage': (itemsPerPage: number) => void;
  'update:sortBy': (sortBy: DataTableSortItem[]) => void;
  'update:expanded': (expanded: any[]) => void;
  'click:row': (event: Event, data: { item: any; index: number }) => void;
  'contextmenu:row': (event: Event, data: { item: any; index: number }) => void;
}

<template>
  <!-- Basic data table -->
  <v-data-table
    :items="items"
    :headers="headers"
    item-value="id"
  />

  <!-- With selection and pagination -->
  <v-data-table
    v-model="selected"
    :items="items"
    :headers="headers"
    :items-per-page="10"
    show-select
    item-value="id"
    @click:row="handleRowClick"
  />

  <!-- Server-side data table -->
  <v-data-table
    :items="serverItems"
    :headers="headers"
    :items-length="totalItems"
    :loading="loading"
    @update:page="loadPage"
    @update:items-per-page="updateItemsPerPage"
    @update:sort-by="updateSort"
  />
</template>

<script setup>
const headers = [
  { title: 'Name', key: 'name', sortable: true },
  { title: 'Email', key: 'email', sortable: true },
  { title: 'Role', key: 'role', sortable: false },
  { title: 'Actions', key: 'actions', sortable: false },
];

const items = ref([
  { id: 1, name: 'John Doe', email: 'john@example.com', role: 'Admin' },
  { id: 2, name: 'Jane Smith', email: 'jane@example.com', role: 'User' },
]);

const selected = ref([]);
</script>

/**
 * Flexible data iterator with custom item templates
 */
const VDataIterator: Component;

interface DataIteratorProps {
  /** Array of data items */
  items?: any[];
  /** Current page number */
  page?: number;
  /** Items per page */
  itemsPerPage?: number;
  /** Total items count for server-side */
  itemsLength?: number;
  /** Sort configuration */
  sortBy?: DataTableSortItem[];
  /** Search query */
  search?: string;
  /** Custom filter function */
  customFilter?: FilterFunction;
  /** Item value key */
  itemValue?: string | ((item: any) => any);
  /** Return object format */
  returnObject?: boolean;
  /** Loading state */
  loading?: boolean;
  /** No data text */
  noDataText?: string;
}

// Events
interface DataIteratorEvents {
  'update:page': (page: number) => void;
  'update:itemsPerPage': (itemsPerPage: number) => void;
  'update:sortBy': (sortBy: DataTableSortItem[]) => void;
}

<template>
  <v-data-iterator
    :items="items"
    :items-per-page="6"
  >
    <template #default="{ items }">
      <v-row>
        <v-col
          v-for="item in items"
          :key="item.id"
          cols="12"
          sm="6"
          md="4"
        >
          <v-card>
            <v-card-title>{{ item.name }}</v-card-title>
            <v-card-text>{{ item.description }}</v-card-text>
          </v-card>
        </v-col>
      </v-row>
    </template>
  </v-data-iterator>
</template>

/**
 * List component for displaying collections of items
 */
const VList: Component;

interface ListProps {
  /** List items array */
  items?: any[];
  /** Selected item values */
  modelValue?: any;
  /** Item value key */
  itemValue?: string | ((item: any) => any);
  /** Item title key */
  itemTitle?: string | ((item: any) => any);
  /** Item props key */
  itemProps?: string | ((item: any) => any);
  /** Item children key for nested lists */
  itemChildren?: string | ((item: any) => any);
  /** Return object format */
  returnObject?: boolean;
  /** List density */
  density?: 'default' | 'comfortable' | 'compact';
  /** Navigation style */
  nav?: boolean;
  /** Selection strategy */
  selectStrategy?: SelectStrategy;
  /** Open strategy for nested items */
  openStrategy?: OpenStrategy;
  /** Activation strategy */
  activateStrategy?: ActiveStrategy;
  /** List background color */
  bgColor?: string;
  /** Whether list items are clickable */
  itemType?: 'item' | 'divider' | 'subheader';
  /** Disable list interactions */
  disabled?: boolean;
  /** Mandatory selection */
  mandatory?: boolean;
  /** Multiple selection */
  multiple?: boolean;
}

// Events
interface ListEvents {
  'update:modelValue': (value: any) => void;
  'update:opened': (opened: any[]) => void;
  'click:open': (data: { id: any; value: boolean }) => void;
  'click:select': (data: { id: any; value: boolean }) => void;
  'click:activate': (data: { id: any; value: boolean }) => void;
}

<template>
  <!-- Basic list -->
  <v-list>
    <v-list-item
      v-for="item in items"
      :key="item.id"
      :title="item.title"
      :subtitle="item.subtitle"
      @click="handleClick(item)"
    />
  </v-list>

  <!-- Navigation list -->
  <v-list nav density="compact">
    <v-list-item
      v-for="item in navItems"
      :key="item.id"
      :to="item.to"
      :prepend-icon="item.icon"
      :title="item.title"
    />
  </v-list>

  <!-- Selection list -->
  <v-list
    v-model="selected"
    select-strategy="multiple-leaf"
  >
    <v-list-item
      v-for="item in selectableItems"
      :key="item.id"
      :value="item.id"
      :title="item.title"
    />
  </v-list>
</template>

/**
 * Simple table wrapper component
 */
const VTable: Component;

interface TableProps {
  /** Table density */
  density?: 'default' | 'comfortable' | 'compact';
  /** Fixed header */
  fixedHeader?: boolean;
  /** Fixed footer */
  fixedFooter?: boolean;
  /** Table height */
  height?: string | number;
  /** Hover effect on rows */
  hover?: boolean;
  /** Theme variant */
  theme?: string;
}

<template>
  <v-table density="compact" hover>
    <thead>
      <tr>
        <th>Name</th>
        <th>Email</th>
        <th>Role</th>
      </tr>
    </thead>
    <tbody>
      <tr v-for="item in items" :key="item.id">
        <td>{{ item.name }}</td>
        <td>{{ item.email }}</td>
        <td>{{ item.role }}</td>
      </tr>
    </tbody>
  </v-table>
</template>

/**
 * Tree view component for hierarchical data
 */
const VTreeview: Component;

interface TreeviewProps {
  /** Tree items array */
  items?: any[];
  /** Selected item values */
  modelValue?: any[];
  /** Opened/expanded nodes */
  opened?: any[];
  /** Activated item */
  activated?: any[];
  /** Item value key */
  itemValue?: string | ((item: any) => any);
  /** Item title key */
  itemTitle?: string | ((item: any) => any);
  /** Item children key */
  itemChildren?: string | ((item: any) => any);
  /** Item props key */
  itemProps?: string | ((item: any) => any);
  /** Return object format */
  returnObject?: boolean;
  /** Selection strategy */
  selectStrategy?: SelectStrategy;
  /** Open strategy */
  openStrategy?: OpenStrategy;
  /** Activation strategy */
  activateStrategy?: ActiveStrategy;
  /** Tree density */
  density?: 'default' | 'comfortable' | 'compact';
  /** Loading state */
  loading?: boolean;
  /** Load children function for lazy loading */
  loadChildren?: (item: any) => Promise<any[]>;
}

// Events  
interface TreeviewEvents {
  'update:modelValue': (value: any[]) => void;
  'update:opened': (opened: any[]) => void;
  'update:activated': (activated: any[]) => void;
  'click:open': (data: { id: any; value: boolean; path: any[] }) => void;
  'click:select': (data: { id: any; value: boolean; path: any[] }) => void;
  'click:activate': (data: { id: any; value: boolean; path: any[] }) => void;
}

<template>
  <!-- Basic tree -->
  <v-treeview
    :items="treeItems"
    item-title="name"
    item-value="id"
    item-children="children"
  />

  <!-- Selectable tree -->
  <v-treeview
    v-model="selected"
    :items="treeItems"
    select-strategy="leaf"
    open-strategy="multiple"
    item-title="name"
    item-value="id"
    item-children="children"
  />

  <!-- Lazy loading tree -->
  <v-treeview
    :items="lazyItems"
    :load-children="loadChildren"
    item-title="name"
    item-value="id"
  />
</template>

<script setup>
const treeItems = ref([
  {
    id: 1,
    name: 'Folder 1',
    children: [
      { id: 2, name: 'File 1.1' },
      { id: 3, name: 'File 1.2' },
    ]
  },
  {
    id: 4,
    name: 'Folder 2',
    children: [
      { id: 5, name: 'File 2.1' },
    ]
  },
]);

const loadChildren = async (item) => {
  // Simulate API call
  await new Promise(resolve => setTimeout(resolve, 1000));
  return [
    { id: `${item.id}-1`, name: `Child of ${item.name}` }
  ];
};
</script>

/**
 * Timeline component for chronological event display
 */
const VTimeline: Component;

interface TimelineProps {
  /** Timeline items */
  items?: any[];
  /** Timeline direction */
  direction?: 'horizontal' | 'vertical';
  /** Alignment of timeline */
  align?: 'start' | 'center' | 'end';
  /** Timeline side for vertical layout */
  side?: 'start' | 'end';
  /** Line thickness */
  lineThickness?: string | number;
  /** Timeline density */
  density?: 'default' | 'comfortable' | 'compact';
  /** Reverse order */
  reverse?: boolean;
  /** Truncate line at edges */
  truncateLine?: 'start' | 'end' | 'both';
}

<template>
  <v-timeline direction="vertical" align="start">
    <v-timeline-item
      v-for="item in timelineItems"
      :key="item.id"
      :dot-color="item.color"
      size="small"
    >
      <template #icon>
        <v-icon>{{ item.icon }}</v-icon>
      </template>
      
      <v-card>
        <v-card-title>{{ item.title }}</v-card-title>
        <v-card-subtitle>{{ item.time }}</v-card-subtitle>
        <v-card-text>{{ item.description }}</v-card-text>
      </v-card>
    </v-timeline-item>
  </v-timeline>
</template>

<script setup>
const timelineItems = [
  {
    id: 1,
    title: 'Project Started',
    time: '9:00 AM',
    description: 'Initial project setup and planning',
    icon: 'mdi-play-circle',
    color: 'success'
  },
  {
    id: 2,
    title: 'Development Phase',
    time: '10:30 AM',
    description: 'Core functionality implementation',
    icon: 'mdi-code-tags',
    color: 'primary'
  }
];
</script>

/**
 * Virtual scrolling container for large datasets
 */
const VVirtualScroll: Component;

interface VirtualScrollProps {
  /** Array of items to render */
  items?: any[];
  /** Height of each item */
  itemHeight?: number | string | ((index: number) => number);
  /** Container height */
  height?: number | string;
  /** Container max height */
  maxHeight?: number | string;
  /** Bench (buffer) size for rendering */
  bench?: number;
  /** Item component to render */
  component?: string | Component;
  /** Item props function */
  itemProps?: (data: { item: any; index: number }) => Record<string, any>;
}

// Events
interface VirtualScrollEvents {
  'update:modelValue': (value: any[]) => void;
}

<template>
  <!-- Basic virtual scroll -->
  <v-virtual-scroll
    :items="largeDataset"
    :item-height="48"
    height="400"
  >
    <template #default="{ item, index }">
      <v-list-item :title="item.name" :subtitle="item.description" />
    </template>
  </v-virtual-scroll>

  <!-- Dynamic item heights -->
  <v-virtual-scroll
    :items="variableItems"
    :item-height="(index) => getItemHeight(index)"
    height="400"
  >
    <template #default="{ item }">
      <v-card class="ma-2">
        <v-card-text>{{ item.content }}</v-card-text>
      </v-card>
    </template>
  </v-virtual-scroll>
</template>

<script setup>
const largeDataset = ref(
  Array.from({ length: 10000 }, (_, i) => ({
    id: i,
    name: `Item ${i}`,
    description: `Description for item ${i}`
  }))
);

const getItemHeight = (index) => {
  return index % 3 === 0 ? 80 : 48; // Variable heights
};
</script>

/**
 * Infinite scroll loading component
 */
const VInfiniteScroll: Component;

interface InfiniteScrollProps {
  /** Loading state */
  loading?: boolean;
  /** Whether there are more items to load */
  hasMore?: boolean;
  /** Load more function */
  onLoad?: (options: { done: (status?: 'ok' | 'error' | 'empty') => void }) => void;
  /** Scroll direction */
  direction?: 'vertical' | 'horizontal';
  /** Distance from edge to trigger load */
  margin?: number;
  /** Container height */
  height?: number | string;
  /** Maximum height */
  maxHeight?: number | string;
  /** Loading text */
  loadingText?: string;
  /** Empty state text */
  emptyText?: string;
  /** Error state text */
  errorText?: string;
  /** Color theme */
  color?: string;
}

// Events
interface InfiniteScrollEvents {
  'load': (options: { done: (status?: string) => void }) => void;
}

<template>
  <v-infinite-scroll
    @load="loadMore"
    height="400"
    :loading="loading"
  >
    <v-list>
      <v-list-item
        v-for="item in items"
        :key="item.id"
        :title="item.title"
        :subtitle="item.subtitle"
      />
    </v-list>
  </v-infinite-scroll>
</template>

<script setup>
const items = ref([]);
const loading = ref(false);
const page = ref(1);

const loadMore = async ({ done }) => {
  loading.value = true;
  
  try {
    const response = await fetchItems(page.value);
    items.value.push(...response.data);
    page.value++;
    
    if (response.hasMore) {
      done('ok');
    } else {
      done('empty'); // No more items
    }
  } catch (error) {
    done('error');
  } finally {
    loading.value = false;
  }
};
</script>

// Filter and comparison types
type FilterFunction = (value: any, query: string, item: any) => boolean;
type FilterMatch = boolean | number | [number, number];

// Selection strategy types
type SelectStrategy = 
  | 'single-leaf' 
  | 'leaf' 
  | 'independent' 
  | 'single-independent' 
  | 'multiple-leaf' 
  | 'multiple-independent';

type OpenStrategy = 'single' | 'multiple' | 'list';
type ActiveStrategy = 'single-leaf' | 'leaf' | 'independent' | 'single-independent';

// Internal item representation
interface InternalItem {
  type: 'item' | 'divider' | 'subheader';
  title: string;
  value: any;
  props: Record<string, any>;
  children?: InternalItem[];
  raw: any;
}