import type { XYPosition, Position, CoordinateExtent, Handle } from '.';
import { Optional } from '../utils/types';
/**
 * Framework independent node data structure.
 *
 * @inline
 * @typeParam NodeData - type of the node data
 * @typeParam NodeType - type of the node
 */
export type NodeBase<NodeData extends Record<string, unknown> = Record<string, unknown>, NodeType extends string | undefined = string | undefined> = {
    /** Unique id of a node. */
    id: string;
    /**
     * Position of a node on the pane.
     * @example { x: 0, y: 0 }
     */
    position: XYPosition;
    /** Arbitrary data passed to a node. */
    data: NodeData;
    /**
     * Only relevant for default, source, target nodeType. Controls source position.
     * @example 'right', 'left', 'top', 'bottom'
     */
    sourcePosition?: Position;
    /**
     * Only relevant for default, source, target nodeType. Controls target position.
     * @example 'right', 'left', 'top', 'bottom'
     */
    targetPosition?: Position;
    /** Whether or not the node should be visible on the canvas. */
    hidden?: boolean;
    selected?: boolean;
    /** Whether or not the node is currently being dragged. */
    dragging?: boolean;
    /** Whether or not the node is able to be dragged. */
    draggable?: boolean;
    selectable?: boolean;
    connectable?: boolean;
    deletable?: boolean;
    /**
     * A class name that can be applied to elements inside the node that allows those elements to act
     * as drag handles, letting the user drag the node by clicking and dragging on those elements.
     */
    dragHandle?: string;
    width?: number;
    height?: number;
    initialWidth?: number;
    initialHeight?: number;
    /** Parent node id, used for creating sub-flows. */
    parentId?: string;
    zIndex?: number;
    /**
     * Boundary a node can be moved in.
     * @example 'parent' or [[0, 0], [100, 100]]
     */
    extent?: 'parent' | CoordinateExtent | null;
    /**
     * When `true`, the parent node will automatically expand if this node is dragged to the edge of
     * the parent node's bounds.
     */
    expandParent?: boolean;
    ariaLabel?: string;
    /**
     * Origin of the node relative to its position.
     * @example
     * [0.5, 0.5] // centers the node
     * [0, 0] // top left
     * [1, 1] // bottom right
     */
    origin?: NodeOrigin;
    handles?: NodeHandle[];
    measured?: {
        width?: number;
        height?: number;
    };
} & (undefined extends NodeType ? {
    /** Type of node defined in nodeTypes */
    type?: string | undefined;
} : {
    /** Type of node defined in nodeTypes */
    type: NodeType;
});
export type InternalNodeBase<NodeType extends NodeBase = NodeBase> = Omit<NodeType, 'measured'> & {
    measured: {
        width?: number;
        height?: number;
    };
    internals: {
        positionAbsolute: XYPosition;
        z: number;
        rootParentIndex?: number;
        /**
         * Holds a reference to the original node object provided by the user.
         * Used as an optimization to avoid certain operations.
         */
        userNode: NodeType;
        handleBounds?: NodeHandleBounds;
        bounds?: NodeBounds;
    };
};
/**
 * The node data structure that gets used for the custom nodes props.
 *
 * @public
 */
export type NodeProps<NodeType extends NodeBase> = Pick<NodeType, 'id' | 'data' | 'width' | 'height' | 'sourcePosition' | 'targetPosition' | 'dragHandle' | 'parentId'> & Required<Pick<NodeType, 'type' | 'dragging' | 'zIndex' | 'selectable' | 'deletable' | 'selected' | 'draggable'>> & {
    /** Whether a node is connectable or not. */
    isConnectable: boolean;
    /** Position absolute x value. */
    positionAbsoluteX: number;
    /** Position absolute y value. */
    positionAbsoluteY: number;
};
export type NodeHandleBounds = {
    source: Handle[] | null;
    target: Handle[] | null;
};
export type InternalNodeUpdate = {
    id: string;
    nodeElement: HTMLDivElement;
    force?: boolean;
};
export type NodeBounds = XYPosition & {
    width: number | null;
    height: number | null;
};
export type NodeDragItem = {
    id: string;
    position: XYPosition;
    distance: XYPosition;
    measured: {
        width: number;
        height: number;
    };
    internals: {
        positionAbsolute: XYPosition;
    };
} & Pick<InternalNodeBase, 'extent' | 'parentId' | 'origin' | 'expandParent' | 'dragging'>;
/**
 * The origin of a Node determines how it is placed relative to its own coordinates.
 * `[0, 0]` places it at the top left corner, `[0.5, 0.5]` right in the center and
 * `[1, 1]` at the bottom right of its position.
 *
 * @public
 */
export type NodeOrigin = [number, number];
export type OnSelectionDrag = (event: MouseEvent, nodes: NodeBase[]) => void;
/**
 * Type for the handles of a node
 *
 * @public
 */
export type NodeHandle = Omit<Optional<Handle, 'width' | 'height'>, 'nodeId'>;
export type Align = 'center' | 'start' | 'end';
export type NodeLookup<NodeType extends InternalNodeBase = InternalNodeBase> = Map<string, NodeType>;
export type ParentLookup<NodeType extends InternalNodeBase = InternalNodeBase> = Map<string, Map<string, NodeType>>;
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