nEngine/packages/core/src/schema/scene.ts

import { z } from "zod";

const sceneCoordSchema = z.number().int().nonnegative();

export const sceneBuildingEntitySchema = z
  .object({
    type: z.literal("building"),
    buildingId: z.string().min(1),
    x: sceneCoordSchema,
    y: sceneCoordSchema,
  })
  .strict();

export const sceneNpcEntitySchema = z
  .object({
    type: z.literal("npc"),
    npcId: z.string().min(1),
    x: sceneCoordSchema,
    y: sceneCoordSchema,
    dialogue: z.string().min(1).optional(),
    label: z.string().min(1).optional(),
  })
  .strict();

export const sceneAnimalEntitySchema = z
  .object({
    type: z.literal("animal"),
    animalId: z.string().min(1),
    x: sceneCoordSchema,
    y: sceneCoordSchema,
  })
  .strict();

export const sceneEntitySchema = z.discriminatedUnion("type", [
  sceneBuildingEntitySchema,
  sceneNpcEntitySchema,
  sceneAnimalEntitySchema,
]);

export const sceneSchema = z
  .object({
    id: z.string().min(1),
    entities: z.array(sceneEntitySchema),
  })
  .strict();

export type SceneBuildingEntity = z.infer<typeof sceneBuildingEntitySchema>;
export type SceneNpcEntity = z.infer<typeof sceneNpcEntitySchema>;
export type SceneAnimalEntity = z.infer<typeof sceneAnimalEntitySchema>;
export type SceneEntity = z.infer<typeof sceneEntitySchema>;
export type SceneDef = z.infer<typeof sceneSchema>;