/**
 * Internal implementation details for the `Event` module.
 */

import type Event from '../Event'
import type EventTarget from '../EventTarget'

export const COMPOSED_PATH_KEY: unique symbol = Symbol('composedPath')
export const CURRENT_TARGET_KEY: unique symbol = Symbol('currentTarget')
export const EVENT_PHASE_KEY: unique symbol = Symbol('eventPhase')
export const IN_PASSIVE_LISTENER_FLAG_KEY: unique symbol = Symbol('inPassiveListenerFlag')
export const IS_TRUSTED_KEY: unique symbol = Symbol('isTrusted')
export const STOP_IMMEDIATE_PROPAGATION_FLAG_KEY: unique symbol = Symbol('stopPropagationFlag')
export const STOP_PROPAGATION_FLAG_KEY: unique symbol = Symbol('stopPropagationFlag')
export const TARGET_KEY: unique symbol = Symbol('target')

export function getCurrentTarget(event: Event): EventTarget | null {
  // @ts-expect-error index on symbol
  return event[CURRENT_TARGET_KEY]
}

export function setCurrentTarget(event: Event, currentTarget: EventTarget | null): void {
  // @ts-expect-error index on symbol
  event[CURRENT_TARGET_KEY] = currentTarget
}

export function getComposedPath(event: Event): ReadonlyArray<EventTarget> {
  // @ts-expect-error index on symbol
  return event[COMPOSED_PATH_KEY]
}

export function setComposedPath(event: Event, composedPath: ReadonlyArray<EventTarget>): void {
  // @ts-expect-error index on symbol
  event[COMPOSED_PATH_KEY] = composedPath
}

export function getEventPhase(event: Event): import('../Event').EventPhase {
  // @ts-expect-error index on symbol
  return event[EVENT_PHASE_KEY]
}

export function setEventPhase(event: Event, eventPhase: import('../Event').EventPhase): void {
  // @ts-expect-error index on symbol
  event[EVENT_PHASE_KEY] = eventPhase
}

export function getInPassiveListenerFlag(event: Event): boolean {
  // @ts-expect-error index on symbol
  return event[IN_PASSIVE_LISTENER_FLAG_KEY]
}

export function setInPassiveListenerFlag(event: Event, value: boolean): void {
  // @ts-expect-error index on symbol
  event[IN_PASSIVE_LISTENER_FLAG_KEY] = value
}

export function getIsTrusted(event: Event): boolean {
  // @ts-expect-error index on symbol
  return event[IS_TRUSTED_KEY]
}

export function setIsTrusted(event: Event, isTrusted: boolean): void {
  // @ts-expect-error index on symbol
  event[IS_TRUSTED_KEY] = isTrusted
}

export function getStopImmediatePropagationFlag(event: Event): boolean {
  // @ts-expect-error index on symbol
  return event[STOP_IMMEDIATE_PROPAGATION_FLAG_KEY]
}

export function setStopImmediatePropagationFlag(event: Event, value: boolean): void {
  // @ts-expect-error index on symbol
  event[STOP_IMMEDIATE_PROPAGATION_FLAG_KEY] = value
}

export function getStopPropagationFlag(event: Event): boolean {
  // @ts-expect-error index on symbol
  return event[STOP_PROPAGATION_FLAG_KEY]
}

export function setStopPropagationFlag(event: Event, value: boolean): void {
  // @ts-expect-error index on symbol
  event[STOP_PROPAGATION_FLAG_KEY] = value
}

export function getTarget(event: Event): EventTarget | null {
  // @ts-expect-error index on symbol
  return event[TARGET_KEY]
}

export function setTarget(event: Event, target: EventTarget | null): void {
  // @ts-expect-error index on symbol
  event[TARGET_KEY] = target
}