Form Controls

/**
 * Primary button component with click handling and various visual styles
 */
const Button = Vue.component;

// Props interface for Button component
interface ButtonProps {
  size?: 'large' | 'medium' | 'small' | 'mini';
  type?: 'primary' | 'success' | 'warning' | 'danger' | 'info' | 'text';
  plain?: boolean;
  round?: boolean;
  circle?: boolean;
  loading?: boolean;
  disabled?: boolean;
  icon?: string;
  autofocus?: boolean;
  nativeType?: 'button' | 'submit' | 'reset' | 'menu';
}

/**
 * Button group container for related button sets
 */
const ButtonGroup = Vue.component;

// Basic button usage
<el-button>Default</el-button>
<el-button type="primary">Primary</el-button>
<el-button type="success">Success</el-button>
<el-button disabled>Disabled</el-button>

// Button with loading state
<el-button :loading="isLoading" @click="handleSubmit">
  Submit
</el-button>

// Button group
<el-button-group>
  <el-button type="primary" icon="el-icon-left">Previous</el-button>
  <el-button type="primary">Next<i class="el-icon-right el-icon--right"></i></el-button>
</el-button-group>

/**
 * Text input component with v-model support
 */
const Input = Vue.component;

interface InputProps {
  value?: string | number;
  placeholder?: string;
  clearable?: boolean;
  showPassword?: boolean;
  showWordLimit?: boolean;
  readonly?: boolean;
  disabled?: boolean;
  type?: string;
  size?: 'large' | 'medium' | 'small' | 'mini';
  rows?: number;
  autosize?: boolean | object;
  maxlength?: number;
  minlength?: number;
  max?: number;
  min?: number;
  step?: number;
  resize?: 'none' | 'both' | 'horizontal' | 'vertical';
  autofocus?: boolean;
  form?: string;
  label?: string;
  tabindex?: string;
  validateEvent?: boolean;
  suffixIcon?: string;
  prefixIcon?: string;
}

/**
 * Numeric input with increment/decrement controls
 */
const InputNumber = Vue.component;

interface InputNumberProps {
  value?: number;
  min?: number;
  max?: number;
  step?: number;
  stepStrictly?: boolean;
  precision?: number;
  size?: 'large' | 'medium' | 'small' | 'mini';
  disabled?: boolean;
  controls?: boolean;
  controlsPosition?: 'right';
  name?: string;
  label?: string;
  placeholder?: string;
}

// Text input with v-model
<el-input 
  v-model="input" 
  placeholder="Please input"
  clearable>
</el-input>

// Password input
<el-input 
  v-model="password" 
  type="password" 
  placeholder="Password"
  show-password>
</el-input>

// Textarea
<el-input 
  v-model="textarea" 
  type="textarea" 
  :rows="2"
  placeholder="Please input">
</el-input>

// Numeric input
<el-input-number 
  v-model="num" 
  :min="1" 
  :max="10"
  label="Number">
</el-input-number>

/**
 * Radio button for single selection
 */
const Radio = Vue.component;

interface RadioProps {
  value?: string | number | boolean;
  label?: string | number | boolean;
  disabled?: boolean;
  border?: boolean;
  size?: 'large' | 'medium' | 'small' | 'mini';
  name?: string;
}

/**
 * Radio group container for multiple radio options
 */
const RadioGroup = Vue.component;

/**
 * Radio button styled as a button
 */
const RadioButton = Vue.component;

/**
 * Checkbox for multiple selections
 */
const Checkbox = Vue.component;

interface CheckboxProps {
  value?: string | number | boolean;
  label?: string | number | boolean;
  indeterminate?: boolean;
  disabled?: boolean;
  checked?: boolean;
  name?: string;
  trueLabel?: string | number;
  falseLabel?: string | number;
  border?: boolean;
  size?: 'large' | 'medium' | 'small' | 'mini';
}

/**
 * Checkbox group container
 */
const CheckboxGroup = Vue.component;

/**
 * Checkbox styled as a button
 */
const CheckboxButton = Vue.component;

/**
 * Toggle switch component
 */
const Switch = Vue.component;

interface SwitchProps {
  value?: boolean;
  disabled?: boolean;
  width?: number;
  activeIconClass?: string;
  inactiveIconClass?: string;
  activeText?: string;
  inactiveText?: string;
  activeColor?: string;
  inactiveColor?: string;
  activeValue?: boolean | string | number;
  inactiveValue?: boolean | string | number;
  name?: string;
  validateEvent?: boolean;
}

// Radio buttons
<el-radio-group v-model="radio">
  <el-radio label="1">Option A</el-radio>
  <el-radio label="2">Option B</el-radio>
</el-radio-group>

// Checkboxes
<el-checkbox-group v-model="checkList">
  <el-checkbox label="Apple">Apple</el-checkbox>
  <el-checkbox label="Orange">Orange</el-checkbox>
  <el-checkbox label="Banana">Banana</el-checkbox>
</el-checkbox-group>

// Switch
<el-switch
  v-model="value"
  active-color="#13ce66"
  inactive-color="#ff4949">
</el-switch>

/**
 * Dropdown select component
 */
const Select = Vue.component;

interface SelectProps {
  value?: any;
  multiple?: boolean;
  disabled?: boolean;
  valueKey?: string;
  size?: 'large' | 'medium' | 'small' | 'mini';
  clearable?: boolean;
  collapseTags?: boolean;
  multipleLimit?: number;
  name?: string;
  autocomplete?: string;
  placeholder?: string;
  filterable?: boolean;
  allowCreate?: boolean;
  filterMethod?: Function;
  remote?: boolean;
  remoteMethod?: Function;
  loading?: boolean;
  loadingText?: string;
  noMatchText?: string;
  noDataText?: string;
  popperClass?: string;
  reserveKeyword?: boolean;
  defaultFirstOption?: boolean;
  popperAppendToBody?: boolean;
  automaticDropdown?: boolean;
}

/**
 * Select option component
 */
const Option = Vue.component;

interface OptionProps {
  value: any;
  label?: string;
  disabled?: boolean;
}

/**
 * Option group for organizing select options
 */
const OptionGroup = Vue.component;

/**
 * Autocomplete input with suggestions
 */
const Autocomplete = Vue.component;

interface AutocompleteProps {
  value?: string;
  debounce?: number;
  placeholder?: string;
  disabled?: boolean;
  valueKey?: string;
  icon?: string;
  customItem?: string;
  fetchSuggestions: (queryString: string, callback: Function) => void;
  popperClass?: string;
  triggerOnFocus?: boolean;
  selectWhenUnmatched?: boolean;
  hideLoading?: boolean;
  popperAppendToBody?: boolean;
  highlightFirstItem?: boolean;
}

// Basic select
<el-select v-model="value" placeholder="Select">
  <el-option
    v-for="item in options"
    :key="item.value"
    :label="item.label"
    :value="item.value">
  </el-option>
</el-select>

// Multiple select with search
<el-select 
  v-model="value"
  multiple
  filterable
  placeholder="Choose">
  <el-option-group label="Group 1">
    <el-option label="Option 1" value="1"></el-option>
  </el-option-group>
</el-select>

// Autocomplete
<el-autocomplete
  v-model="state"
  :fetch-suggestions="querySearch"
  placeholder="Please Input"
  @select="handleSelect">
</el-autocomplete>

/**
 * Form container with validation
 */
const Form = Vue.component;

interface FormProps {
  model?: object;
  rules?: object;
  labelPosition?: 'right' | 'left' | 'top';
  labelWidth?: string;
  labelSuffix?: string;
  inline?: boolean;
  inlineMessage?: boolean;
  statusIcon?: boolean;
  showMessage?: boolean;
  size?: 'large' | 'medium' | 'small' | 'mini';
  disabled?: boolean;
  validateOnRuleChange?: boolean;
  hideRequiredAsterisk?: boolean;
}

/**
 * Form field wrapper with label and validation
 */
const FormItem = Vue.component;

interface FormItemProps {
  label?: string;
  labelWidth?: string;
  prop?: string;
  required?: boolean;
  rules?: object | array;
  error?: string;
  showMessage?: boolean;
  inlineMessage?: boolean | string;
  size?: 'large' | 'medium' | 'small' | 'mini';
}

// Validation rule types
interface ValidationRule {
  required?: boolean;
  message?: string;
  trigger?: 'blur' | 'change';
  min?: number;
  max?: number;
  type?: string;
  pattern?: RegExp;
  validator?: (rule: any, value: any, callback: Function) => void;
}

// Form with validation
<el-form :model="ruleForm" :rules="rules" ref="ruleForm" label-width="100px">
  <el-form-item label="Name" prop="name">
    <el-input v-model="ruleForm.name"></el-input>
  </el-form-item>
  <el-form-item label="Email" prop="email">
    <el-input v-model="ruleForm.email"></el-input>
  </el-form-item>
  <el-form-item>
    <el-button type="primary" @click="submitForm('ruleForm')">Submit</el-button>
    <el-button @click="resetForm('ruleForm')">Reset</el-button>
  </el-form-item>
</el-form>

// Validation rules
rules: {
  name: [
    { required: true, message: 'Please input name', trigger: 'blur' },
    { min: 3, max: 5, message: 'Length should be 3 to 5', trigger: 'blur' }
  ],
  email: [
    { required: true, message: 'Please input email', trigger: 'blur' },
    { type: 'email', message: 'Please input correct email', trigger: ['blur', 'change'] }
  ]
}

/**
 * Date picker component with calendar interface
 */
const DatePicker = Vue.component;

interface DatePickerProps {
  value?: Date | string | Array<Date | string>;
  readonly?: boolean;
  disabled?: boolean;
  editable?: boolean;
  clearable?: boolean;
  size?: 'large' | 'medium' | 'small' | 'mini';
  placeholder?: string;
  startPlaceholder?: string;
  endPlaceholder?: string;
  type?: 'year' | 'month' | 'date' | 'dates' | 'week' | 'datetime' | 'datetimerange' | 'daterange' | 'monthrange';
  format?: string;
  align?: 'left' | 'center' | 'right';
  popperClass?: string;
  pickerOptions?: object;
  rangeSeparator?: string;
  defaultValue?: Date | Array<Date>;
  defaultTime?: string | Array<string>;
  valueFormat?: string;
  name?: string;
  unlinkPanels?: boolean;
  prefixIcon?: string;
  clearIcon?: string;
  validateEvent?: boolean;
}

/**
 * Time picker component for time selection
 */
const TimePicker = Vue.component;

interface TimePickerProps {
  value?: Date | string;
  readonly?: boolean;
  disabled?: boolean;
  editable?: boolean;
  clearable?: boolean;
  size?: 'large' | 'medium' | 'small' | 'mini';
  placeholder?: string;
  startPlaceholder?: string;
  endPlaceholder?: string;
  isRange?: boolean;
  arrowControl?: boolean;
  align?: 'left' | 'center' | 'right';
  popperClass?: string;
  pickerOptions?: object;
  rangeSeparator?: string;
  valueFormat?: string;
  defaultValue?: Date | string;
  name?: string;
  prefixIcon?: string;
  clearIcon?: string;
  validateEvent?: boolean;
}

/**
 * Time select component with predefined time options
 */
const TimeSelect = Vue.component;

interface TimeSelectProps {
  value?: string;
  disabled?: boolean;
  editable?: boolean;
  clearable?: boolean;
  size?: 'large' | 'medium' | 'small' | 'mini';
  placeholder?: string;
  name?: string;
  prefixIcon?: string;
  clearIcon?: string;
  start?: string;
  end?: string;
  step?: string;
  minTime?: string;
  maxTime?: string;
}

// Date picker
<el-date-picker
  v-model="value1"
  type="date"
  placeholder="Pick a day">
</el-date-picker>

// Date range picker
<el-date-picker
  v-model="value2"
  type="daterange"
  range-separator="To"
  start-placeholder="Start date"
  end-placeholder="End date">
</el-date-picker>

// DateTime picker
<el-date-picker
  v-model="value3"
  type="datetime"
  placeholder="Select date and time">
</el-date-picker>

// Time picker
<el-time-picker
  v-model="value4"
  placeholder="Arbitrary time">
</el-time-picker>

// Time range picker
<el-time-picker
  is-range
  v-model="value5"
  range-separator="To"
  start-placeholder="Start time"
  end-placeholder="End time">
</el-time-picker>

// Time select
<el-time-select
  v-model="value6"
  :picker-options="{
    start: '08:30',
    step: '00:15',
    end: '18:30'
  }"
  placeholder="Select time">
</el-time-select>

/**
 * Slider component for range selection
 */
const Slider = Vue.component;

interface SliderProps {
  value?: number | array;
  min?: number;
  max?: number;
  disabled?: boolean;
  step?: number;
  showInput?: boolean;
  showInputControls?: boolean;
  inputSize?: 'large' | 'medium' | 'small' | 'mini';
  showStops?: boolean;
  showTooltip?: boolean;
  formatTooltip?: Function;
  range?: boolean;
  vertical?: boolean;
  height?: string;
  label?: string;
  debounce?: number;
  tooltipClass?: string;
  marks?: object;
}

/**
 * Color picker component
 */
const ColorPicker = Vue.component;

interface ColorPickerProps {
  value?: string;
  disabled?: boolean;
  size?: 'large' | 'medium' | 'small' | 'mini';
  showAlpha?: boolean;
  colorFormat?: 'hsl' | 'hsv' | 'hex' | 'rgb';
  popperClass?: string;
  predefine?: array;
}

/**
 * Rate component for rating input
 */
const Rate = Vue.component;

interface RateProps {
  value?: number;
  max?: number;
  disabled?: boolean;
  allowHalf?: boolean;
  lowThreshold?: number;
  highThreshold?: number;
  colors?: array | object;
  voidColor?: string;
  disabledVoidColor?: string;
  iconClasses?: array | object;
  voidIconClass?: string;
  disabledVoidIconClass?: string;
  showText?: boolean;
  showScore?: boolean;
  textColor?: string;
  texts?: array;
  scoreTemplate?: string;
}

/**
 * File upload component
 */
const Upload = Vue.component;

interface UploadProps {
  action: string;
  headers?: object;
  multiple?: boolean;
  data?: object;
  name?: string;
  withCredentials?: boolean;
  showFileList?: boolean;
  drag?: boolean;
  accept?: string;
  onPreview?: Function;
  onRemove?: Function;
  onSuccess?: Function;
  onError?: Function;
  onProgress?: Function;
  onChange?: Function;
  beforeUpload?: Function;
  beforeRemove?: Function;
  listType?: 'text' | 'picture' | 'picture-card';
  autoUpload?: boolean;
  fileList?: array;
  disabled?: boolean;
  limit?: number;
  onExceed?: Function;
  httpRequest?: Function;
}

// Slider
<el-slider 
  v-model="value"
  :min="0"
  :max="100"
  show-input>
</el-slider>

// Color picker
<el-color-picker 
  v-model="color"
  show-alpha
  :predefine="predefineColors">
</el-color-picker>

// Rate
<el-rate
  v-model="value"
  :colors="colors"
  :max="5"
  show-text>
</el-rate>

// Upload
<el-upload
  class="upload-demo"
  action="https://jsonplaceholder.typicode.com/posts/"
  :on-preview="handlePreview"
  :on-remove="handleRemove"
  :file-list="fileList"
  list-type="picture">
  <el-button size="small" type="primary">Click to upload</el-button>
</el-upload>

/**
 * Cascader component for hierarchical selection
 */
const Cascader = Vue.component;

interface CascaderProps {
  value?: any[];
  options?: any[];
  props?: object;
  size?: 'large' | 'medium' | 'small' | 'mini';
  placeholder?: string;
  disabled?: boolean;
  clearable?: boolean;
  expandTrigger?: 'click' | 'hover';
  showAllLevels?: boolean;
  filterable?: boolean;
  separator?: string;
  debounce?: number;
  changeOnSelect?: boolean;
  popperClass?: string;
  popperAppendToBody?: boolean;
  filterMethod?: Function;
  beforeFilter?: Function;
}

/**
 * CascaderPanel component - the core cascading selection panel
 */
const CascaderPanel = Vue.component;

interface CascaderPanelProps {
  value?: any | any[];                    // v-model binding value
  options?: CascaderOption[];             // Data source for cascader options
  props?: CascaderPanelConfig;            // Configuration options object
  border?: boolean;                       // Whether to show border around panel
  renderLabel?: Function;                 // Custom render function for node labels
}

interface CascaderPanelConfig {
  expandTrigger?: 'click' | 'hover';      // How to trigger option expansion
  multiple?: boolean;                     // Enable multiple selection
  checkStrictly?: boolean;                // Independent node selection
  emitPath?: boolean;                     // Whether to emit full path or just leaf value
  lazy?: boolean;                         // Enable dynamic loading of child nodes
  lazyLoad?: Function;                    // Function for loading child node data
  value?: string;                         // Key name for node value property
  label?: string;                         // Key name for node label property
  children?: string;                      // Key name for node children property
  disabled?: string;                      // Key name for node disabled property
  leaf?: string;                          // Key name for node leaf property
  hoverThreshold?: number;                // Hover delay threshold (ms) for hover trigger
}

interface CascaderOption {
  label: string;                          // Display text for the option
  value: any;                             // Value identifier for the option
  children?: CascaderOption[];            // Child options (for nested structure)
  disabled?: boolean;                     // Whether option is disabled
  leaf?: boolean;                         // Whether option is a leaf node
}

/**
 * Transfer component for moving items between lists
 */
const Transfer = Vue.component;

interface TransferProps {
  value?: any[];
  data?: any[];
  filterable?: boolean;
  filterPlaceholder?: string;
  filterMethod?: Function;
  targetOrder?: 'original' | 'push' | 'unshift';
  titles?: string[];
  buttonTexts?: string[];
  renderContent?: Function;
  format?: object;
  props?: object;
  leftDefaultChecked?: any[];
  rightDefaultChecked?: any[];
}

/**
 * Steps component for step-by-step workflow
 */
const Steps = Vue.component;

interface StepsProps {
  space?: number | string;
  direction?: 'vertical' | 'horizontal';
  active?: number;
  processStatus?: 'wait' | 'process' | 'finish' | 'error' | 'success';
  finishStatus?: 'wait' | 'process' | 'finish' | 'error' | 'success';
  alignCenter?: boolean;
  simple?: boolean;
}

/**
 * Individual step component
 */
const Step = Vue.component;

interface StepProps {
  title?: string;
  description?: string;
  icon?: string;
  status?: 'wait' | 'process' | 'finish' | 'error' | 'success';
}

// Cascader
<el-cascader
  v-model="value"
  :options="options"
  @change="handleChange">
</el-cascader>

// Cascader with custom props
<el-cascader
  v-model="value"
  :options="options"
  :props="{ checkStrictly: true }"
  clearable>
</el-cascader>

// CascaderPanel - Basic usage
<el-cascader-panel 
  v-model="selectedValue"
  :options="cascaderOptions">
</el-cascader-panel>

// CascaderPanel - Multiple selection
<el-cascader-panel 
  v-model="multipleValues"
  :options="options"
  :props="{ multiple: true }">
</el-cascader-panel>

// CascaderPanel - Custom node rendering
<el-cascader-panel :options="options">
  <template slot-scope="{ node, data }">
    <span>{{ data.label }}</span>
    <span v-if="data.code"> ({{ data.code }})</span>
  </template>
</el-cascader-panel>

// CascaderPanel - Dynamic loading
<el-cascader-panel 
  :options="[]"
  :props="{ lazy: true, lazyLoad: loadNodes }">
</el-cascader-panel>

// Transfer
<el-transfer
  v-model="value"
  :data="data"
  :titles="['Source', 'Target']"
  :button-texts="['To left', 'To right']"
  @change="handleChange">
</el-transfer>

// Transfer with search
<el-transfer
  v-model="value"
  filterable
  :filter-method="filterMethod"
  filter-placeholder="State"
  :data="data">
</el-transfer>

// Steps
<el-steps :active="active" finish-status="success">
  <el-step title="Step 1" description="This is a description."></el-step>
  <el-step title="Step 2" description="This is a description."></el-step>
  <el-step title="Step 3" description="This is a description."></el-step>
</el-steps>

// Vertical steps
<el-steps direction="vertical" :active="1">
  <el-step title="Step 1" description="This is a description"></el-step>
  <el-step title="Step 2" description="This is a description"></el-step>
  <el-step title="Step 3" description="This is a description" status="error"></el-step>
</el-steps>