import { ComponentType } from 'react';
import { StyleProp, ViewStyle } from 'react-native';
import { RenderersProps } from 'react-native-render-html';

/**
 * An object describing how to generate styles. See {@link cssRulesFromSpecs}.
 *
 * <img src="https://raw.githubusercontent.com/native-html/table-plugin/master/images/TableStyleSpecs.png" />
 *
 * @public
 */
export interface TableStyleSpecs {
  /**
   * Will text be selectable.
   */
  selectableText: boolean;
  /**
   * Expand table to HTML width.
   */
  fitContainerWidth: boolean;
  /**
   * Expand table to HTML height.
   * **You must une unconstrained height for this to work!**
   * See {@link TableConfig.computeContainerHeight}.
   */
  fitContainerHeight: boolean;
  /**
   * Spacing between cells, in em.
   */
  cellPaddingEm: number;
  /**
   * Font size, in pixels.
   *
   * @remarks This value being applied to root, it will affect rem and em.
   */
  fontSizePx: number | null;
  /**
   * The width of the border between rows.
   */
  rowsBorderWidthPx: number;
  /**
   * The width of the border between columns.
   */
  columnsBorderWidthPx: number;
  /**
   * The border color of the table frame.
   */
  outerBorderColor: string;
  /**
   * The border width for the table frame.
   */
  outerBorderWidthPx: number;
  /**
   * Link of anchors.
   */
  linkColor: string;
  /**
   * Font family.
   *
   * @remarks
   * You will need to do additional work to support non-native fonts.
   */
  fontFamily: string;
  /**
   * Table cell border color.
   */
  tdBorderColor: string;
  /**
   * Table header cell border color.
   */
  thBorderColor: string;
  /**
   * Table even header cell background color.
   */
  thOddBackground: string;
  /**
   * Table odd header cell text color.
   */
  thOddColor: string;
  /**
   * Table even header cell background color.
   */
  thEvenBackground: string;
  /**
   * Table even header cell text color.
   */
  thEvenColor: string;
  /**
   * Table odd row background color.
   */
  trOddBackground: string;
  /**
   * Table odd row text color.
   */
  trOddColor: string;
  /**
   * Table even row background color.
   */
  trEvenBackground: string;
  /**
   * Table even row text color.
   */
  trEvenColor: string;
}

/**
 * This content height state is available on mount, before the real height is
 * known from the DOM.
 *
 * @remarks
 * `heuristicHeight` is an approximated height used to minimize the “flash”
 * effect of height transitions, see
 * {@link TableConfig.computeHeuristicContentHeight}.
 *
 * @public
 */
export interface TableHeuristicContentHeightState {
  type: 'heuristic';
  contentHeight: number;
}

/**
 *
 * This content height state appears when the real table height is available,
 * after the DOM has been mounted in the `WebView`.
 *
 * @public
 */
export interface TableAccurateContentHeightState {
  type: 'accurate';
  contentHeight: number;
}

/**
 * An object describing the present knowledge of content height.
 *
 * @public
 */
export type TableContentHeightState =
  | TableHeuristicContentHeightState
  | TableAccurateContentHeightState;

/**
 * This object defines how the table component can be customized.
 *
 * @public
 */
export interface TableConfig {
  /**
   * What kind of animation should be used when height is changed?
   * <ul>
   *   <li>
   *     <b>layout</b>: use native `LayoutAnimation`. This is the best option
   *     performance-wise, but requires some setup. See
   *     https://facebook.github.io/react-native/docs/layoutanimation.
   *   </li>
   *   <li>
   *     <b>animated</b>: use `Animated` module from react-native.
   *   </li>
   *   <li>
   *     <b>none</b>: no animations are performed.
   *   </li>
   * </ul>
   *
   * @defaultValue `'animated'`
   */
  animationType?: 'none' | 'layout' | 'animated';

  /**
   * The animation duration in milliseconds when infered height value changes.
   * See {@link TableConfig.computeContainerHeight}.
   *
   * @defaultValue 120
   */
  animationDuration?: number;

  /**
   * A function which will compute container's height given the table content
   * height.
   *
   * @remarks
   * For each instance, this function will be called twice. First time on
   * container mount, and second time when the DOM has been mounted inside of
   * `WebView`. At that moment, the state will hold the real content height.
   * See {@link TableContentHeightState}.
   *
   * @defaultValue A function which will use heuristics to guess content height
   * before DOM loaded, and real content height after DOM loaded. You can change
   * those heuristics with {@link TableConfig.computeHeuristicContentHeight}.
   *
   * @returns The container height, or `null` for unconstrained height. In that
   * case, it is advised that you provide a fixed height through `style` prop,
   * otherwise React Native won't be able to figure out the container height
   * and it will not be visible.
   */
  computeContainerHeight?: (state: TableContentHeightState) => number | null;

  /**
   * A function to compute approximate content height before the real content
   * height has been fetched on DOM mount.
   *
   * @defaultValue A simple implementation which looks at the number of
   * characters and screen width.
   */
  computeHeuristicContentHeight?: (state: HTMLTableStats) => number;

  /**
   * Override default CSS rules with this prop.
   *
   * @remarks
   * You should at least set a rule which adds a 0-margin to `body` and `html`,
   * otherwise the table will look truncated.
   * When set, `tableStyleSpecs` is ignored. If you want to extend default
   * instead of override CSS styles, look at example bellow.
   *
   * @example
   * ```
   * const cssRules = cssRulesFromSpecs(defaultTableStylesSpecs) + `
   * a {
   *   text-transform: uppercase;
   * }
   * `;
   *
   * const config = {
   *   cssRules,
   *   // Other config options
   * };
   * ```
   */
  cssRules?: string;

  /**
   * Max zoom scale (must be greater than 1).
   *
   * @defaultValue 1
   */
  maxScale?: boolean;

  /**
   * Container style.
   */
  style?: StyleProp<ViewStyle>;

  /**
   * Specs to generate css rules.
   *
   * <img src="https://raw.githubusercontent.com/native-html/table-plugin/master/images/TableStyleSpecs.png" />
   *
   * @remarks
   * This prop will be ignored when `cssRules` are provided.
   */
  tableStyleSpecs?: TableStyleSpecs;

  /**
   * Any props you'd like to pass to the `WebView` component.
   *
   * @remarks
   * `source` and `javascriptEnabled` will be ignored and overriden.
   */
  webViewProps?: any;
  /**
   * Determine how the width of the table is constrained (or not).
   *
   * <ul>
   *   <li>
   *     <b>normal</b>: the table will have no peculiar constrain on <code>width</code> or <code>maxWidth</code>.
   *   </li>
   *   <li>
   *     <b>embedded</b>: the table acts like a width-constrained embedded (React Native Render HTML RFC001), with
   *     <code>maxWidth</code> determined by <code>contentWidth</code> and <code>computeEmbeddedMaxWidth</code>.
   *   </li>
   *   <li>
   *     <b>expand</b>: like <b>embedded</b>, but with <code>width</code> set to <code>maxWidth</code>. This can
   *     be useful to have a center-aligned table on wide screens.
   *   </li>
   * </ul>
   *
   * @defaultvalue 'normal'
   */
  displayMode?: 'normal' | 'embedded' | 'expand';
}

/**
 * An object holding information on the table shape.
 *
 * @public
 */
export interface HTMLTableStats {
  /**
   * Number of rows, header included
   */
  numOfRows: number;

  /**
   * Number of columns.
   */
  numOfColumns: number;

  /**
   * Number of text characters.
   */
  numOfChars: number;
}

/**
 * Base props for HTMLTable original and custom components.
 *
 * @public
 */
export interface HTMLTableBaseProps extends HTMLTableStats {
  /**
   * The outerHtml of <table> tag.
   */
  html: string;

  /**
   * The base to resolve relative URLs.
   */
  sourceBaseUrl?: string;

  /**
   * Intercept links press.
   */
  onLinkPress?: RenderersProps['a']['onPress'];

  /**
   * Html attributes for this table node.
   */
  htmlAttribs?: Record<string, string>;

  /**
   * The `WebView` Component you wish to use.
   */
  WebView: ComponentType<any>;
}

/**
 * Props for HTMLTable component.
 *
 * @public
 */
export interface HTMLTableProps extends TableConfig, HTMLTableBaseProps {}