import {RNG} from "@/utils/rng";

export type Part<TMeta = {}> = {
  id: string;

  sides?: number;
  side?: number;

  alignments?: string[];
  alignment?: string;
  regionId: string;
  position: number[];
} & TMeta;

export function flip<TMeta>(part: Part<TMeta>) {
  if(!part.sides) return;
  part.side = ((part.side || 0) + 1) % part.sides;
}

export function flipTo<TMeta>(part: Part<TMeta>, side: number) {
  if(!part.sides || side >= part.sides) return;
  part.side = side;
}

export function roll<TMeta>(part: Part<TMeta>, rng: RNG) {
  if(!part.sides) return;
  part.side = rng.nextInt(part.sides);
}

export function findPartById<TMeta>(parts: Record<string, Part<TMeta>>, id: string): Part<TMeta> | undefined {
  return parts[id];
}

export function isCellOccupied<TMeta>(parts: Record<string, Part<TMeta>>, regionId: string, position: number[]): boolean {
  const posKey = position.join(',');
  return Object.values(parts).some(p => p.regionId === regionId && p.position.join(',') === posKey);
}

export function getPartAtPosition<TMeta>(parts: Record<string, Part<TMeta>>, regionId: string, position: number[]): Part<TMeta> | undefined {
  const posKey = position.join(',');
  return Object.values(parts).find(p => p.regionId === regionId && p.position.join(',') === posKey);
}