/**
 * "Run in editor": a behavior that keeps running while the project is not playing. Unlike play
 * mode this one edits the saved model, so these tests watch what lands in the scene itself.
 */
import { describe, expect, it } from 'vitest';
import { CreateAssetCommand, SetAssetPropertyCommand } from '../../src/core/commands/assetCommands';
import { CreateContainerCommand } from '../../src/core/commands/containerCommands';
import { instanceChildId } from '../../src/core/model/instance';
import { ClearOverrideCommand, SetOverrideCommand } from '../../src/core/commands/sceneObjectCommands';
import type { BehaviorAsset, ContainerAsset, VariablesAsset } from '../../src/core/model/Asset';
import { hasEditorRun, runsInEditor } from '../../src/core/properties/editorRun';
import { schemaFor } from '../../src/core/properties/PropertySchema';
import { resolveSceneObjectProps } from '../../src/core/properties/resolve';
import { findAsset } from '../../src/core/model/Project';
import { EditorRun } from '../../src/editor/EditorRun';
import type { World } from '../../src/runtime/World';
import { EditorState } from '../../src/editor/state';
import { VARIABLES_PARAM } from '../../src/core/graph';
import {
  graphEditor,
  makeBehavior,
  makeSpriteScene,
  makeVariables,
  place,
  type SceneFixture,
} from '../helpers';

/** Wires `On update → Move(owner, dx = 1, scale = 100)`: the owner drifts 100 units per second. */
function drift(f: SceneFixture, behavior: BehaviorAsset): void {
  const edit = graphEditor(f, behavior);
  const update = edit.addNode('OnUpdate');
  const owner = edit.addNode('Owner');
  const move = edit.addNode('Move', { dx: 1, scale: 100 });
  edit.wire([
    [update, 'exec', move, 'exec'],
    [update, 'dt', move, 'dt'],
    [owner, 'object', move, 'object'],
  ]);
}

/** A box with a drifting behavior below it, in a state the editor run can be pointed at. */
function scene() {
  const f = makeSpriteScene('Box');
  const behavior = makeBehavior(f, 'Drift');
  drift(f, behavior);
  const box = place(f, f.spriteId, { x: 0, y: 0 });
  const logic = place(f, behavior.id, { x: 0, y: 0 }, box);

  const state = new EditorState();
  state.loadProject(f.project, 1);
  /** Stands in for the game view being the focused tab; flipped by the keyboard tests. */
  const keyboard = { focused: false, world: null as World | null };
  const run = new EditorRun(state, {
    focused: () => keyboard.focused,
    onWorld: (world) => (keyboard.world = world),
  });
  return {
    ...f,
    behavior,
    box,
    logic,
    state,
    run,
    keyboard,
    /** One frame, after telling the run that the model may have changed (the Editor's wiring). */
    frame(dt = 1 / 60) {
      run.invalidate();
      run.tick(dt);
    },
    boxX: () => f.object(box).position.x,
  };
}

/**
 * The shape a real level has: the box and its behavior packed into a container asset and placed
 * once, so the scene stores the container object alone and the content is resolved (`instance.ts`).
 */
function containerScene() {
  const f = scene();
  const create = new CreateContainerCommand(f.sceneId, [f.box]);
  f.stack.execute(create);
  const asset = () => findAsset(f.project, create.assetId) as ContainerAsset;
  const [tBox, tLogic] = asset().objects.map((t) => t.id) as [string, string];
  const child = (templateId: string) => instanceChildId(create.objectId, templateId);
  return {
    ...f,
    containerId: create.assetId,
    tBox,
    tLogic,
    child,
    template: (id: string) => asset().objects.find((t) => t.id === id)!,
    instanceEdits: () => f.sceneOf().objects[0]!.instanceEdits,
    switchOn: () => f.state.execute(new SetOverrideCommand(f.sceneId, child(tLogic), 'runInEditor', true)),
    boxX: () => f.object(child(tBox)).position.x,
  };
}

describe('the run-in-editor switch', () => {
  it('is a behavior property, off unless a scene object asks for it', () => {
    const f = scene();
    expect(schemaFor('behavior').map((d) => d.key)).toContain('runInEditor');
    const asset = findAsset(f.project, f.behavior.id)!;

    expect(runsInEditor(resolveSceneObjectProps(f.project, asset, f.object(f.logic)))).toBe(false);
    expect(hasEditorRun(f.project, f.sceneOf())).toBe(false);

    f.state.execute(new SetOverrideCommand(f.sceneId, f.logic, 'runInEditor', true));
    expect(runsInEditor(resolveSceneObjectProps(f.project, asset, f.object(f.logic)))).toBe(true);
    expect(hasEditorRun(f.project, f.sceneOf())).toBe(true);
  });

  it('leaves everything alone until it is switched on', () => {
    const f = scene();
    for (let i = 0; i < 10; i++) f.frame();
    expect(f.run.debugInfo()).toEqual({ running: false, time: 0, behaviors: [], keyboard: false });
    expect(f.boxX()).toBe(0);
  });

  it('drives the object in the saved model once it is on, and marks the project for saving', () => {
    const f = scene();
    f.state.execute(new SetOverrideCommand(f.sceneId, f.logic, 'runInEditor', true));
    // The command itself dirtied the project; the question is whether the *run* does too.
    f.state.setSaveStatus('saved');

    f.frame(0.1);
    expect(f.run.debugInfo().behaviors).toEqual([f.logic]);
    expect(f.boxX()).toBeCloseTo(10);
    // Not a copy, not a preview: the stored scene object moved, and that has to be saved.
    expect(f.sceneOf().objects.find((o) => o.id === f.box)!.position.x).toBeCloseTo(10);
    expect(f.state.saveStatus).toBe('dirty');

    f.frame(0.1);
    expect(f.boxX()).toBeCloseTo(20);
  });

  it('runs only the behaviors that ask for it', () => {
    const f = scene();
    const second = makeBehavior(f, 'Idle');
    drift(f, second);
    place(f, second.id, { x: 0, y: 0 }, f.box);
    f.state.execute(new SetOverrideCommand(f.sceneId, f.logic, 'runInEditor', true));

    f.frame(0.1);
    // Both behaviors own the same box: were the second one running too, it would drift twice as far.
    expect(f.run.debugInfo().behaviors).toEqual([f.logic]);
    expect(f.boxX()).toBeCloseTo(10);
  });

  it('stops the moment the switch is taken back', () => {
    const f = scene();
    f.state.execute(new SetOverrideCommand(f.sceneId, f.logic, 'runInEditor', true));
    f.frame(0.1);
    expect(f.boxX()).toBeCloseTo(10);

    f.state.execute(new ClearOverrideCommand(f.sceneId, f.logic, 'runInEditor'));
    f.frame(0.1);
    f.frame(0.1);
    expect(f.run.debugInfo().running).toBe(false);
    expect(f.boxX()).toBeCloseTo(10);
  });

  it('holds still while the project is playing – that world runs every behavior already', () => {
    const f = scene();
    f.state.execute(new SetOverrideCommand(f.sceneId, f.logic, 'runInEditor', true));
    f.state.enterPlay();

    f.frame(0.1);
    expect(f.run.debugInfo().running).toBe(false);

    // The play copy carries the same ids, so the saved model must be the one left untouched.
    f.state.exitPlay();
    expect(f.boxX()).toBe(0);
  });

  it('does not run a behavior whose scene is not the loaded one', () => {
    const f = scene();
    f.state.execute(new SetOverrideCommand(f.sceneId, f.logic, 'runInEditor', true));
    f.frame(0.1);
    expect(f.run.debugInfo().running).toBe(true);

    const other = new CreateAssetCommand('scene', 'Level 2');
    f.state.execute(other);
    f.project.activeSceneId = other.asset.id;
    f.frame(0.1);
    f.frame(0.1);
    expect(f.run.debugInfo().running).toBe(false);
    expect(f.boxX()).toBeCloseTo(10);
  });
});

describe('a behavior inside a placed container', () => {
  it('is found although the scene only stores the container object', () => {
    const f = containerScene();
    expect(f.sceneOf().objects).toHaveLength(1);
    expect(hasEditorRun(f.project, f.sceneOf())).toBe(false);

    f.switchOn();
    expect(hasEditorRun(f.project, f.sceneOf())).toBe(true);
  });

  it('drives the content, and the move is kept as an instance edit instead of baking it out', () => {
    const f = containerScene();
    f.switchOn();
    f.state.setSaveStatus('saved');

    f.frame(0.1);
    expect(f.run.debugInfo().behaviors).toEqual([f.child(f.tLogic)]);
    expect(f.boxX()).toBeCloseTo(10);
    expect(f.state.saveStatus).toBe('dirty');

    // Baking would spell the content out as stored objects and drop every instance edit, so what
    // moved has to land on the instance – where the template still reaches the rest of it.
    expect(f.sceneOf().objects).toHaveLength(1);
    expect(f.instanceEdits()[f.tBox]?.position.x).toBeCloseTo(10);

    f.frame(0.1);
    expect(f.boxX()).toBeCloseTo(20);
    expect(f.instanceEdits()[f.tBox]?.position.x).toBeCloseTo(20);
  });

  it('leaves the template alone, so a second instance of the same level stays put', () => {
    const f = containerScene();
    const second = place(f, f.containerId, { x: 500, y: 0 });
    f.switchOn();

    f.frame(0.1);
    expect(f.boxX()).toBeCloseTo(10);
    // The switch is an edit of the first instance only: the same box in the second one has neither
    // the behavior running nor the movement.
    expect(f.object(instanceChildId(second, f.tBox)).position.x).toBe(0);
    expect(f.template(f.tBox).position.x).toBe(0);
  });
});

describe('the keyboard of an editor run', () => {
  it('is the game view’s, and only while something is running there', () => {
    const f = containerScene();
    expect(f.run.debugInfo().keyboard).toBe(false);

    f.switchOn();
    f.frame(0.1);
    // Running, but the editor still owns the keys: the game view is not the focused tab.
    expect(f.run.debugInfo()).toMatchObject({ running: true, keyboard: false });

    f.keyboard.focused = true;
    expect(f.run.debugInfo().keyboard).toBe(true);
  });

  it('hands the world to the game view while it runs, so clicks can reach it', () => {
    const f = containerScene();
    f.switchOn();
    f.frame(0.1);
    expect(f.keyboard.world).not.toBeNull();

    f.state.execute(new ClearOverrideCommand(f.sceneId, f.child(f.tLogic), 'runInEditor'));
    f.frame(0.1);
    f.frame(0.1);
    expect(f.keyboard.world).toBeNull();
  });
});

/**
 * A Variables asset while the editor runs. This world is built on the saved model, so it is the
 * place where a value that belongs to the run could leak into the document – and must not.
 */
describe('shared variables of an editor run', () => {
  /** A Variables asset holding `score`, and a behavior writing 1 into it when it starts. */
  function sharedScene() {
    const f = scene();
    const shared = makeVariables(f, 'Score', ['score']);
    const writer = makeBehavior(f, 'Writer');
    const edit = graphEditor(f, writer);
    const start = edit.addNode('OnStart');
    const one = edit.addNode('Add', { a: 1, b: 0 });
    const write = edit.variables(['score'], { write: true, params: { [VARIABLES_PARAM]: shared.id } });
    edit.wire([
      [start, 'exec', write, 'exec'],
      [one, 'result', write, 'score'],
    ]);
    const object = place(f, writer.id, { x: 0, y: 0 });
    f.state.execute(new SetOverrideCommand(f.sceneId, object, 'runInEditor', true));
    return {
      ...f,
      sharedId: shared.id,
      writerObject: object,
      live: () => f.run.liveVariables(shared.id)?.score,
      declared: () => (findAsset(f.project, shared.id) as VariablesAsset).props.score,
    };
  }

  it('holds a value of its own, and leaves the document the one it started from', () => {
    const f = sharedScene();
    f.frame(0.1);
    expect(f.live()).toBe(1);
    for (let i = 0; i < 5; i++) f.frame(0.1);
    expect(f.declared()).toBe(0);
  });

  it('takes over a value edited while it runs', () => {
    const f = sharedScene();
    f.frame(0.1);
    f.state.execute(new SetAssetPropertyCommand(f.sharedId, 'score', 5));
    f.frame(0.1);
    expect(f.live()).toBe(5);
  });

  /** Without a run there is no live value, so the panels go back to showing the declaration. */
  it('answers with nothing once the run has ended', () => {
    const f = sharedScene();
    f.frame(0.1);
    expect(f.live()).toBe(1);

    f.state.execute(new ClearOverrideCommand(f.sceneId, f.writerObject, 'runInEditor'));
    f.frame(0.1);
    expect(f.run.liveVariables(f.sharedId)).toBeNull();
  });
});

describe('the game nodes in the editor run (#167)', () => {
  it('ignores Pause game and says so: the scene keeps moving', () => {
    const f = scene();
    const edit = graphEditor(f, f.behavior);
    edit.connect(edit.addNode('OnStart'), 'exec', edit.addNode('PauseGame'), 'exec');
    f.state.execute(new SetOverrideCommand(f.sceneId, f.logic, 'runInEditor', true));

    f.frame(0.1);
    f.frame(0.1);
    expect(f.boxX()).toBeCloseTo(20);
    expect(f.keyboard.world?.paused).toBe(false);
    expect(f.keyboard.world?.log).toContain('Pause game is ignored in the editor run');
  });
});