/**
 * An asset as a value (#237): Spawn and Is asset take it on a port, fed by the Asset literal, an Asset
 * variable or a list item – and a pick saved before the setting became a port still spawns. Plus
 * Child by name, which finds the nearest object of a name below another.
 */
import { describe, expect, it } from 'vitest';
import { CreateAssetCommand } from '../../src/core/commands/assetCommands';
import { AddVariableCommand } from '../../src/core/commands/variableCommands';
import { isKindWith, VARIABLE_KINDS } from '../../src/core/properties/kinds';
import { tagged } from '../../src/core/model/Properties';
import {
  makeBehavior,
  graphEditor,
  makeSpriteScene,
  place,
  roundTrip,
  startWorld,
  type SceneFixture,
} from '../helpers';

function sprite(f: SceneFixture, name: string): string {
  const command = new CreateAssetCommand('sprite', name);
  f.stack.execute(command);
  return command.asset.id;
}

describe('the asset kind', () => {
  it('can be declared, picked and tagged in a list', () => {
    expect(VARIABLE_KINDS).toContain('asset');
    for (const role of ['field', 'port', 'tagged', 'reference']) expect(isKindWith(role, 'asset')).toBe(true);
  });

  it('keeps an Asset variable and its value through saving', () => {
    const f = makeSpriteScene('Crate');
    const behavior = makeBehavior(f, 'Spawner');
    f.stack.execute(new AddVariableCommand(behavior.id, 'what', 'asset'));
    behavior.props.what = f.spriteId;
    const loaded = roundTrip(f.project).assets.find((a) => a.id === behavior.id)!;
    expect(loaded.type === 'behavior' && loaded.variables.find((v) => v.key === 'what')?.kind).toBe('asset');
    expect(loaded.props.what).toBe(f.spriteId);
  });
});

describe('Spawn with an asset input', () => {
  const spawnedOf = (f: SceneFixture, world: ReturnType<typeof startWorld>['world']) =>
    world.entities.filter((e) => e.assetId === f.spriteId).length;

  it('places the asset an Asset literal hands it over an edge', () => {
    const f = makeSpriteScene('Crate');
    const behavior = makeBehavior(f, 'Spawner');
    const edit = graphEditor(f, behavior);
    const start = edit.addNode('OnStart');
    const literal = edit.addNode('Asset', { value: f.spriteId });
    const spawn = edit.addNode('Spawn');
    edit.wire([
      [start, 'exec', spawn, 'exec'],
      [literal, 'value', spawn, 'asset'],
    ]);
    place(f, behavior.id, { x: 0, y: 0 });
    const run = startWorld(f, { behaviors: true });
    run.frame();
    expect(spawnedOf(f, run.world)).toBe(1);
  });

  it('places the asset a list item tagged $asset names', () => {
    const f = makeSpriteScene('Crate');
    const behavior = makeBehavior(f, 'Spawner');
    const edit = graphEditor(f, behavior);
    const start = edit.addNode('OnStart');
    const list = edit.addNode('List', { value: [tagged('asset', f.spriteId)] });
    const item = edit.addNode('ItemAt');
    const spawn = edit.addNode('Spawn');
    edit.wire([
      [start, 'exec', spawn, 'exec'],
      [list, 'value', item, 'list'],
      [item, 'item', spawn, 'asset'],
    ]);
    place(f, behavior.id, { x: 0, y: 0 });
    const run = startWorld(f, { behaviors: true });
    run.frame();
    expect(spawnedOf(f, run.world)).toBe(1);
  });

  it('still spawns what a project saved before the pick became a port', () => {
    const f = makeSpriteScene('Crate');
    const behavior = makeBehavior(f, 'Spawner');
    const edit = graphEditor(f, behavior);
    const start = edit.addNode('OnStart');
    // The old setting and the new inline value share the key `asset`.
    const spawn = edit.addNode('Spawn', { asset: f.spriteId });
    edit.wire([[start, 'exec', spawn, 'exec']]);
    place(f, behavior.id, { x: 0, y: 0 });
    const loaded = { ...f, project: roundTrip(f.project) };
    const run = startWorld(loaded, { behaviors: true });
    run.frame();
    expect(spawnedOf(loaded, run.world)).toBe(1);
  });
});

describe('Child by name', () => {
  /**
   * Hitbox (top level, first in the scene) · Player › Weapon › Hitbox · Player › Weapon › Tag ·
   * Player › Tag (placed after the deeper one).
   */
  function scene() {
    const f = makeSpriteScene('Player');
    const hitbox = sprite(f, 'Hitbox');
    const weapon = sprite(f, 'Weapon');
    const tag = sprite(f, 'Tag');
    const loose = place(f, hitbox, { x: 0, y: 0 });
    const player = place(f, f.spriteId, { x: 0, y: 0 });
    const blade = place(f, weapon, { x: 0, y: 0 }, player);
    const inner = place(f, hitbox, { x: 0, y: 0 }, blade);
    const deepTag = place(f, tag, { x: 0, y: 0 }, blade);
    const nearTag = place(f, tag, { x: 0, y: 0 }, player);
    return { f, loose, player, inner, deepTag, nearTag };
  }

  it('finds a grandchild below the object, not a namesake elsewhere', () => {
    const { f, loose, player, inner } = scene();
    const { world } = startWorld(f);
    const found = world.childByName(world.findByObjectId(player)!, 'Hitbox');
    expect(found?.objectId).toBe(inner);
    expect(world.findByName('Hitbox')?.objectId).toBe(loose);
  });

  it('takes a child before a grandchild of the same name', () => {
    const { f, player, nearTag } = scene();
    const { world } = startWorld(f);
    expect(world.childByName(world.findByObjectId(player)!, 'Tag')?.objectId).toBe(nearTag);
  });

  it('finds nothing above or beside the object', () => {
    const { f, inner } = scene();
    const { world } = startWorld(f);
    expect(world.childByName(world.findByObjectId(inner)!, 'Player')).toBeUndefined();
    expect(world.childByName(world.findByObjectId(inner)!, 'Hitbox')).toBeUndefined();
  });

  it('hands the found child on in a running graph', () => {
    const { f, loose, player, inner } = scene();
    const behavior = makeBehavior(f, 'Cleaner');
    const edit = graphEditor(f, behavior);
    const start = edit.addNode('OnStart');
    const owner = edit.addNode('Owner');
    const child = edit.addNode('ChildByName', { name: 'Hitbox' });
    const destroy = edit.addNode('Destroy');
    edit.wire([
      [start, 'exec', destroy, 'exec'],
      [owner, 'object', child, 'object'],
      [child, 'child', destroy, 'object'],
    ]);
    place(f, behavior.id, { x: 0, y: 0 }, player);
    const run = startWorld(f, { behaviors: true });
    run.frame();
    expect(run.world.findByObjectId(inner)).toBeUndefined();
    expect(run.world.findByObjectId(loose)).toBeDefined();
  });
});