import type { Encounter, FacingDirection } from '../types';

const DEFAULT_NPC_SCENE_OVERLAY_OFFSETS = {
  hpTop: -40,
  nameTop: -20,
  dialogueTop: -56,
};

const GENERIC_NPC_SCENE_OVERLAY_OFFSETS = {
  hpTop: -24,
  nameTop: -8,
  dialogueTop: -48,
};

export const GENERIC_NPC_SCENE_FOOT_OFFSET_PX = -30;

export function isGenericNpcEncounter(encounter: Encounter | null | undefined) {
  return Boolean(encounter && encounter.kind !== 'treasure' && !encounter.characterId && !encounter.monsterPresetId);
}

export function invertFacing(facing: FacingDirection): FacingDirection {
  return facing === 'left' ? 'right' : 'left';
}

export function getRenderableNpcFacing(
  encounter: Encounter | null | undefined,
  facing: FacingDirection,
  options?: { medievalVisual?: boolean },
): FacingDirection {
  const medieval =
    options?.medievalVisual ??
    Boolean(encounter && encounter.kind !== 'treasure' && isGenericNpcEncounter(encounter));
  return medieval ? invertFacing(facing) : facing;
}

export function getNpcSceneFootOffset(encounter: Encounter | null | undefined) {
  return isGenericNpcEncounter(encounter) ? GENERIC_NPC_SCENE_FOOT_OFFSET_PX : 0;
}

export function getNpcSceneOverlayOffsets(encounter: Encounter | null | undefined) {
  return isGenericNpcEncounter(encounter)
    ? GENERIC_NPC_SCENE_OVERLAY_OFFSETS
    : DEFAULT_NPC_SCENE_OVERLAY_OFFSETS;
}