import {type RefObject} from 'react'

export interface PanelElement {
  id: string
  type: 'panel'
  defaultSize: number | null
  order: number
  maxWidth: number | null
  minWidth: number
}

export interface ResizerElement {
  id: string
  order: number
  type: 'resizer'
  el: RefObject<HTMLDivElement | null>
}

export type ElementMap = Map<string, PanelElement | ResizerElement>

export interface PanelsState {
  elements: ElementMap
  panels: PanelElement[]
  widths: number[]
}

export interface InitialDragState {
  containerWidth: number
  panelAfter: PanelElement | null
  panelBefore: PanelElement | null
  resizerIndex: number
  startX: number
  resizerRect: DOMRect | null
  widths: number[]
  dragOffset: number
}

export interface PresentationPanelsContextValue {
  activeResizer: string | null
  drag: (id: string, event: MouseEvent) => void
  getPanelStyle: (id: string) => React.CSSProperties
  registerElement: (id: string, panel: PanelElement | ResizerElement) => void
  startDragging: (id: string, event: MouseEvent) => void
  stopDragging: () => void
  unregisterElement: (id: string) => void
}