import { GraphNode as DagNode } from 'd3-dag';
import { SyntheticEvent } from 'react';
import {
  Orientation,
  PathClassFunction,
  PathFunction,
  PathFunctionOption,
  Point,
  RawNodeDatum,
  RenderCustomNodeElementFn,
  TreeNodeDatum,
} from '../types/common.js';

export type TreeNodeEventCallback = (node: DagNode<TreeNodeDatum>, event: SyntheticEvent) => any;

export type TreeLinkEventCallback = (
  sourceNode: DagNode<TreeNodeDatum>,
  targetNode: DagNode<TreeNodeDatum>,
  event: SyntheticEvent
) => any;

/**
 * Props accepted by the `Tree` component.
 *
 * {@link Tree.defaultProps | Default Props}
 */
export interface TreeProps {
  /**
   * The root node object, in which child nodes (also of type `RawNodeDatum`)
   * are recursively defined in the `children` key.
   *
   * `react-d3-dag` will automatically attach a unique `id` attribute to each node in the DOM,
   * as well as `data-source-id` & `data-target-id` attributes to each link connecting two nodes.
   */
  data: RawNodeDatum[] | RawNodeDatum;

  /**
   * Custom render function that will be used for every node in the tree.
   *
   * The function is passed `CustomNodeElementProps` as its first argument.
   * `react-d3-dag` expects the function to return a `ReactElement`.
   *
   * See the `RenderCustomNodeElementFn` type for more details.
   *
   * {@link Tree.defaultProps.renderCustomNodeElement | Default value}
   */
  renderCustomNodeElement?: RenderCustomNodeElementFn;

  /**
   * Called when a node is clicked.
   *
   * {@link Tree.defaultProps.onNodeClick | Default value}
   */
  onNodeClick?: TreeNodeEventCallback;

  /**
   * Called when mouse enters the space belonging to a node.
   *
   * {@link Tree.defaultProps.onNodeMouseOver | Default value}
   */
  onNodeMouseOver?: TreeNodeEventCallback;

  /**
   * Called when mouse leaves the space belonging to a node.
   *
   * {@link Tree.defaultProps.onNodeMouseOut | Default value}
   */
  onNodeMouseOut?: TreeNodeEventCallback;

  /**
   * Called when a link is clicked.
   *
   * {@link Tree.defaultProps.onLinkClick | Default value}
   */
  onLinkClick?: TreeLinkEventCallback;

  /**
   * Called when mouse enters the space belonging to a link.
   *
   * {@link Tree.defaultProps.onLinkMouseOver | Default value}
   */
  onLinkMouseOver?: TreeLinkEventCallback;

  /**
   * Called when mouse leaves the space belonging to a link.
   *
   * {@link Tree.defaultProps.onLinkMouseOut | Default value}
   */
  onLinkMouseOut?: TreeLinkEventCallback;

  /**
   * Called when the inner D3 component updates. That is - on every zoom or translate event,
   * or when tree branches are toggled.
   *
   * {@link Tree.defaultProps.onUpdate | Default value}
   */
  onUpdate?: (target: { node: TreeNodeDatum | null; zoom: number; translate: Point }) => any;

  /**
   * Determines along which axis the tree is oriented.
   *
   * `horizontal` - Tree expands along x-axis (left-to-right).
   *
   * `vertical` - Tree expands along y-axis (top-to-bottom).
   *
   * Additionally, passing a negative value to {@link TreeProps.depthFactor | depthFactor} will
   * invert the tree's direction (i.e. right-to-left, bottom-to-top).
   *
   * {@link Tree.defaultProps.orientation | Default value}
   */
  orientation?: Orientation;

  /**
   * Translates the graph along the x/y axis by the specified amount of pixels.
   *
   * By default, the graph will render in the top-left corner of the SVG canvas.
   *
   * {@link Tree.defaultProps.translate | Default value}
   */
  translate?: Point;

  /**
   * Enables the centering of nodes on click by providing the dimensions of the tree container,
   * e.g. via {@link https://developer.mozilla.org/en-US/docs/Web/API/Element/getBoundingClientRect | `getBoundingClientRect()`}.
   *
   * If dimensions are given: node will center on click. If not, node will not center on click.
   */
  dimensions?: {
    width: number;
    height: number;
  };

  /**
   * Sets the time (in milliseconds) for the transition to center a node once clicked.
   *
   * {@link Tree.defaultProps.centeringTransitionDuration | Default value}
   */
  centeringTransitionDuration?: number;

  /**
   * The draw function (or `d`) used to render `path`/`link` elements. Accepts a predefined
   * `PathFunctionOption` or a user-defined `PathFunction`.
   *
   * See the `PathFunction` type for more information.
   *
   * For details on draw functions, see: https://developer.mozilla.org/en-US/docs/Web/SVG/Attribute/d
   *
   * {@link Tree.defaultProps.pathFunc | Default value}
   */
  pathFunc?: PathFunctionOption | PathFunction;

  /**
   * Allows for additional className(s) to be passed to links.
   *
   * Each link calls `pathClassFunc` with its own `TreeLinkDatum` and the tree's current `orientation`.
   * Expects a `className` string to be returned.
   *
   * See the `PathClassFunction` type for more information.
   *
   * {@link Tree.defaultProps.pathClassFunc | Default value}
   */
  pathClassFunc?: PathClassFunction;

  /**
   * Determines the spacing between parent & child nodes.
   *
   * **Tip: Negative values invert the tree's direction.**
   *
   * `node.y = node.depth * depthFactor`
   *
   * Example: `depthFactor: 0` renders all nodes on the same height (since node.y === 0 for all).
   *
   * {@link Tree.defaultProps.depthFactor | Default value}
   */
  depthFactor?: number;

  /**
   * Determines whether the tree's nodes can collapse/expand.
   *
   * {@link Tree.defaultProps.collapsible | Default value}
   */
  collapsible?: boolean;

  /**
   * Sets the maximum node depth to which the tree is expanded on its initial render.
   *
   * By default, the tree renders to full depth.
   *
   * {@link Tree.defaultProps.initialDepth | Default value}
   */
  initialDepth?: number;

  /**
   * Toggles ability to zoom in/out on the Tree by scaling it according to `scaleExtent`.
   *
   * {@link Tree.defaultProps.zoomable | Default value}
   */
  zoomable?: boolean;

  /**
   * Toggles ability to drag the Tree.
   *
   * {@link Tree.defaultProps.draggable | Default value}
   */
  draggable?: boolean;

  /**
   * A floating point number to set the initial zoom level. It is constrained by `scaleExtent`.
   *
   * {@link Tree.defaultProps.zoom | Default value}
   */
  zoom?: number;

  /**
   * Sets the minimum/maximum extent to which the tree can be scaled if `zoomable` is true.
   *
   * {@link Tree.defaultProps.scaleExtent | Default value}
   */
  scaleExtent?: {
    min?: number;
    max?: number;
  };

  /**
   * The amount of space each node element occupies.
   *
   * {@link Tree.defaultProps.nodeSize | Default value}
   */
  nodeSize?: {
    x: number;
    y: number;
  };

  /**
   * Sets separation between neighboring nodes, differentiating between siblings (same parent node)
   * and non-siblings.
   *
   * {@link Tree.defaultProps.separation | Default value}
   */
  separation?: {
    siblings?: number;
    nonSiblings?: number;
  };

  /**
   * If a node is currently being expanded, all other nodes at the same depth will be collapsed.
   *
   * {@link Tree.defaultProps.shouldCollapseNeighborNodes | Default value}
   */
  shouldCollapseNeighborNodes?: boolean;

  /**
   * Allows for additional className(s) to be passed to the `svg` element wrapping the tree.
   *
   * {@link Tree.defaultProps.svgClassName | Default value}
   */
  svgClassName?: string;

  /**
   * Allows for additional className(s) to be passed to the root node.
   *
   * {@link Tree.defaultProps.rootNodeClassName | Default value}
   */
  rootNodeClassName?: string;

  /**
   * Allows for additional className(s) to be passed to all branch nodes (nodes with children).
   *
   * {@link Tree.defaultProps.branchNodeClassName | Default value}
   */
  branchNodeClassName?: string;

  /**
   * Allows for additional className(s) to be passed to all leaf nodes (nodes without children).
   *
   * {@link Tree.defaultProps.leafNodeClassName | Default value}
   */
  leafNodeClassName?: string;

  /**
   * Enables/disables legacy transitions using `react-transition-group`.
   *
   * **Note:** This flag is considered legacy and **usage is discouraged for large trees**,
   * as responsiveness may suffer.
   *
   * `enableLegacyTransitions` will be deprecated once a suitable
   * replacement for transitions has been found.
   *
   * {@link Tree.defaultProps.enableLegacyTransitions | Default value}
   */
  enableLegacyTransitions?: boolean;

  /**
   * Sets the animation duration (in milliseconds) of each expansion/collapse of a tree node.
   * Requires `enableLegacyTransition` to be `true`.
   *
   * {@link Tree.defaultProps.transitionDuration | Default value}
   */
  transitionDuration?: number;

  /**
   * Disables drag/pan/zoom D3 events when hovering over a node.
   * Useful for cases where D3 events interfere when interacting with inputs or other interactive elements on a node.
   *
   * **Tip:** Holding the `Shift` key while hovering over a node re-enables the D3 events.
   *
   * {@link Tree.defaultProps.hasInteractiveNodes | Default value}
   */
  hasInteractiveNodes?: boolean;

  /**
   * Indicates the tree being represented by the data. If the dataKey changes, then we should re-render the tree.
   * If the data changes but the dataKey keeps being the same, then it's a change (like adding children to a node) for the same tree,
   * so we shouldn't re-render the tree.
   *
   * {@link Tree.defaultProps.dataKey | Default value}
   */
  dataKey?: string;
}