import type { ContextMenu } from "./ContextMenu"
import type { LGraphNode, NodeId } from "./LGraphNode"
import type { LinkDirection, RenderShape } from "./types/globalEnums"
import type { LinkId } from "./LLink"

export type Dictionary<T> = { [key: string]: T }

/** Allows all properties to be null.  The same as `Partial<T>`, but adds null instead of undefined. */
export type NullableProperties<T> = {
    [P in keyof T]: T[P] | null
}

export type CanvasColour = string | CanvasGradient | CanvasPattern

/**
 * An object that can be positioned, selected, and moved.
 *
 * May contain other {@link Positionable} objects.
 */
export interface Positionable {
    id: NodeId | number
    /** Position in graph coordinates.  Default: 0,0 */
    pos: Point
    /** true if this object is part of the selection, otherwise false. */
    selected?: boolean

    readonly children?: ReadonlySet<Positionable>

    /**
     * Adds a delta to the current position.
     * @param deltaX X value to add to current position
     * @param deltaY Y value to add to current position
     * @param skipChildren If true, any child objects like group contents will not be moved
     */
    move(deltaX: number, deltaY: number, skipChildren?: boolean): void

    /**
     * Cached position & size as `x, y, width, height`.
     * @readonly See {@link move}
     */
    readonly boundingRect: ReadOnlyRect

    /** Called whenever the item is selected */
    onSelected?(): void
    /** Called whenever the item is deselected */
    onDeselected?(): void
}

/**
 * An object that can be pinned.
 *
 * Prevents the object being accidentally moved or resized by mouse interaction.
 */
export interface IPinnable {
    pinned: boolean
    pin(value?: boolean): void
    unpin(): void
}

export interface IInputOrOutput {
    // If an input, this will be defined
    input?: INodeInputSlot
    // If an output, this will be defined
    output?: INodeOutputSlot
}

export interface IFoundSlot extends IInputOrOutput {
    // Slot index
    slot: number
    // Centre point of the rendered slot connection
    link_pos: Point
}

/** A point represented as `[x, y]` co-ordinates */
export type Point = [x: number, y: number] | Float32Array | Float64Array

/** A size represented as `[width, height]` */
export type Size = [width: number, height: number] | Float32Array | Float64Array

/** A very firm array */
type ArRect = [x: number, y: number, width: number, height: number]

/** A rectangle starting at top-left coordinates `[x, y, width, height]` */
export type Rect = ArRect | Float32Array | Float64Array

/** A rectangle starting at top-left coordinates `[x, y, width, height]`.  Requires functions exclusive to `TypedArray`. */
export type Rect32 = Float32Array

/** A point represented as `[x, y]` co-ordinates that will not be modified */
export type ReadOnlyPoint = readonly [x: number, y: number] | ReadOnlyTypedArray<Float32Array> | ReadOnlyTypedArray<Float64Array>
/** A rectangle starting at top-left coordinates `[x, y, width, height]` that will not be modified */
export type ReadOnlyRect = readonly [x: number, y: number, width: number, height: number] | ReadOnlyTypedArray<Float32Array> | ReadOnlyTypedArray<Float64Array>

type TypedArrays = Int8Array | Uint8Array | Uint8ClampedArray | Int16Array | Uint16Array | Int32Array | Uint32Array | Float32Array | Float64Array
type TypedBigIntArrays = BigInt64Array | BigUint64Array
type ReadOnlyTypedArray<T extends TypedArrays | TypedBigIntArrays> = Omit<T, "fill" | "copyWithin" | "reverse" | "set" | "sort" | "subarray">

/** Union of property names that are of type Match */
export type KeysOfType<T, Match> = { [P in keyof T]: T[P] extends Match ? P : never }[keyof T]

/** A new type that contains only the properties of T that are of type Match */
export type PickByType<T, Match> = { [P in keyof T]: Extract<T[P], Match> }

/** The names of all (optional) methods and functions in T */
export type MethodNames<T> = KeysOfType<T, ((...args: any) => any) | undefined>

export interface IBoundaryNodes {
    top: LGraphNode
    right: LGraphNode
    bottom: LGraphNode
    left: LGraphNode
}

export type Direction = "top" | "bottom" | "left" | "right"

export interface IOptionalSlotData<TSlot extends INodeInputSlot | INodeOutputSlot> {
    content: string
    value: TSlot
    className?: string
}

export type ISlotType = number | string

export interface INodeSlot {
    name: string
    type: ISlotType
    dir?: LinkDirection
    removable?: boolean
    shape?: RenderShape
    not_subgraph_input?: boolean
    color_off?: CanvasColour
    color_on?: CanvasColour
    label?: string
    locked?: boolean
    nameLocked?: boolean
    pos?: Point
    widget?: unknown
}

export interface INodeFlags {
    skip_repeated_outputs?: boolean
    allow_interaction?: boolean
    pinned?: boolean
    collapsed?: boolean
}

export interface INodeInputSlot extends INodeSlot {
    link: LinkId | null
    not_subgraph_input?: boolean
}

export interface INodeOutputSlot extends INodeSlot {
    links: LinkId[] | null
    _data?: unknown
    slot_index?: number
    not_subgraph_output?: boolean
}

/** Links */
export interface ConnectingLink extends IInputOrOutput {
    node: LGraphNode
    slot: number
    pos: Point
    direction?: LinkDirection
}

interface IContextMenuBase {
    title?: string
    className?: string
    callback?(value?: unknown, options?: unknown, event?: MouseEvent, previous_menu?: ContextMenu, node?: LGraphNode): void | boolean
}

/** ContextMenu */
export interface IContextMenuOptions extends IContextMenuBase {
    ignore_item_callbacks?: boolean
    parentMenu?: ContextMenu
    event?: MouseEvent
    extra?: unknown
    scroll_speed?: number
    left?: number
    top?: number
    scale?: string
    node?: LGraphNode
    autoopen?: boolean
}

export interface IContextMenuValue extends IContextMenuBase {
    value?: string
    content: string
    has_submenu?: boolean
    disabled?: boolean
    submenu?: IContextMenuSubmenu
    property?: string
    type?: string
    slot?: IFoundSlot
}

export interface IContextMenuSubmenu extends IContextMenuOptions {
    options: ConstructorParameters<typeof ContextMenu>[0]
}