import { describe, expect, it } from 'vitest';
import { SetAssetPropertyCommand } from '../../src/core/commands/assetCommands';
import {
  ClearOverrideCommand,
  RemoveSceneObjectCommand,
  SetOverrideCommand,
  SetParentCommand,
} from '../../src/core/commands/sceneObjectCommands';
import { findScene } from '../../src/core/model/Project';
import { World } from '../../src/runtime/World';
import { makeSpriteScene, place, roundTrip, startWorld } from '../helpers';

/** Two boxes: a at the origin and b at (300,0). */
function setup() {
  const f = makeSpriteScene();
  const a = place(f, f.spriteId, { x: 0, y: 0 });
  const b = place(f, f.spriteId, { x: 300, y: 0 });
  return { ...f, a, b };
}

describe('world ↔ model synchronisation (editing while playing)', () => {
  it('syncFromModel picks up placed, moved, edited, re-parented and removed objects', () => {
    const f = setup();
    const { stack, sceneId, spriteId, a, b, object } = f;
    const { world } = startWorld(f);
    expect(world.entities.map((e) => e.objectId)).toEqual([a, b]);

    // Placed while playing → new entity, existing ones keep their identity.
    const entityA = world.findByObjectId(a)!;
    const c = place(f, spriteId, { x: 50, y: 50 });
    world.syncFromModel();
    expect(world.entities).toHaveLength(3);
    expect(world.findByObjectId(a)).toBe(entityA);

    // Property edits (override, asset value) and parenting are reflected; props bag keeps identity.
    const propsA = entityA.props;
    stack.execute(new SetOverrideCommand(sceneId, a, 'width', 40));
    stack.execute(new SetAssetPropertyCommand(spriteId, 'height', 70));
    stack.execute(new SetParentCommand(sceneId, b, a));
    world.syncFromModel();
    expect(entityA.props).toBe(propsA);
    expect(entityA.props.width).toBe(40);
    expect(entityA.props.height).toBe(70);
    expect(world.findByObjectId(b)!.parent).toBe(entityA);
    expect(world.findByObjectId(b)!.x).toBe(object(b).position.x);

    // Removed while playing → entity gone.
    stack.execute(new RemoveSceneObjectCommand(sceneId, c));
    world.syncFromModel();
    expect(world.entities.map((e) => e.objectId)).toEqual([a, b]);
  });

  it('syncToModel writes positions, changed values as overrides and destroyed entities back', () => {
    const f = setup();
    const { project, sceneId, a, b, object, sceneOf } = f;
    const { world } = startWorld(f);
    const entityA = world.findByObjectId(a)!;
    entityA.x = 123;
    entityA.props.width = 999; // what a Set property node would do
    entityA.props.height = 100; // unchanged → no override
    expect(world.syncToModel()).toBe(false);
    expect(object(a).position).toEqual({ x: 123, y: 0, z: 0 });
    expect(object(a).overrides).toEqual({ width: 999 });

    // Round trip: the model now resolves to the runtime values, so a sync back changes nothing.
    world.syncFromModel();
    expect(entityA.x).toBe(123);
    expect(entityA.props.width).toBe(999);

    // Resetting the override in the editor returns the entity to the asset value.
    new ClearOverrideCommand(sceneId, a, 'width').execute(project);
    world.syncFromModel();
    expect(entityA.props.width).toBe(100);

    // Destroy (node) removes the entity; the sync drops its object – a structural change.
    world.remove(world.findByObjectId(b)!);
    expect(world.syncToModel()).toBe(true);
    expect(sceneOf().objects.map((o) => o.id)).toEqual([a]);
  });

  it('spawn adds an object to the runtime scene and an entity at once, without resetting others', () => {
    const f = setup();
    const { sceneId, spriteId, a, sceneOf } = f;
    const { world } = startWorld(f);
    const entityA = world.findByObjectId(a)!;
    entityA.x = 77; // moved earlier in this tick – a spawn must not pull the model value back

    const child = world.spawn(spriteId, { x: 10, y: 20, z: 1 }, entityA)!;
    expect(child).not.toBeNull();
    expect(child.parent).toBe(entityA);
    expect(child.type).toBe('sprite');
    expect(child.name).toBe('Box');
    expect(child.props.width).toBe(100);
    expect(entityA.x).toBe(77);
    const object = sceneOf().objects.find((o) => o.id === child.objectId)!;
    expect(object.parentId).toBe(a);
    expect(object.position).toEqual({ x: 10, y: 20, z: 1 });

    // The spawn is a structural change the panels must see – reported once.
    expect(world.syncToModel()).toBe(true);
    expect(world.syncToModel()).toBe(false);
    // A full sync from the model keeps the spawned entity (identity included).
    world.syncFromModel();
    expect(world.findByObjectId(child.objectId)).toBe(child);
    expect(child.parent).toBe(entityA);

    // Destroying the spawned entity drops its object again.
    world.remove(child);
    expect(world.syncToModel()).toBe(true);
    expect(sceneOf().objects.some((o) => o.id === child.objectId)).toBe(false);

    // Unknown or unplaceable assets spawn nothing.
    expect(world.spawn('nope', { x: 0, y: 0, z: 0 }, null)).toBeNull();
    expect(world.spawn(sceneId, { x: 0, y: 0, z: 0 }, null)).toBeNull();
  });

  it('a play-mode copy leaves the original model untouched', () => {
    const { project, sceneId, a, object, sceneOf } = setup();
    const copy = roundTrip(project);
    const world = World.instantiate(copy, sceneId);
    world.findByObjectId(a)!.x = 500;
    world.remove(world.findByObjectId(a)!);
    world.syncToModel();
    expect(findScene(copy, sceneId)!.objects).toHaveLength(1);
    expect(object(a).position.x).toBe(0);
    expect(sceneOf().objects).toHaveLength(2);
  });
});