/**
 * Reordering what the inspector lets be dragged (#310): variables, the fields of a struct at any
 * depth, a Struct asset's fields with every place of its type, and the declared ports of a start node.
 * Only the order may change – values, edges and what runs stay as they were.
 */
import { describe, expect, it } from 'vitest';
import { CreateAssetCommand, SetAssetPropertyCommand } from '../../src/core/commands/assetCommands';
import { CommandError } from '../../src/core/commands/Command';
import { AddPortCommand, MovePortCommand } from '../../src/core/commands/portCommands';
import { SetStructTypeCommand, WithStructTypes } from '../../src/core/commands/structTypeCommands';
import {
  AddStructFieldCommand,
  AddVariableCommand,
  MoveStructFieldCommand,
  MoveVariableCommand,
} from '../../src/core/commands/variableCommands';
import {
  BEHAVIOR_END,
  BEHAVIOR_PARAM,
  BEHAVIOR_START,
  GraphInterpreter,
  RUN_BEHAVIOR,
  resolveDef,
} from '../../src/core/graph';
import type { BehaviorAsset, StructAsset } from '../../src/core/model/Asset';
import { graphLookup } from '../../src/core/model/graphLookup';
import type { StructDef } from '../../src/core/properties/PropertySchema';
import { fakeContext, fire, graphEditor, makeBehavior, makeProject, type ProjectFixture } from '../helpers';

const keys = (list: readonly { key: string }[] | undefined) => (list ?? []).map((item) => item.key);

describe('reordering variables and struct fields', () => {
  it('moves a variable and leaves the values alone; undo moves it back', () => {
    const f = makeProject();
    const behavior = makeBehavior(f, 'B', ['a', 'b', 'c']);
    const props = structuredClone(behavior.props);
    f.stack.execute(new MoveVariableCommand(behavior.id, 0, 2));
    expect(keys(behavior.variables)).toEqual(['b', 'c', 'a']);
    expect(behavior.props).toEqual(props);
    f.stack.undo();
    expect(keys(behavior.variables)).toEqual(['a', 'b', 'c']);
  });

  it('refuses a place the list does not have', () => {
    const f = makeProject();
    const behavior = makeBehavior(f, 'B', ['a', 'b']);
    expect(() => new MoveVariableCommand(behavior.id, 0, 2).execute(f.project)).toThrow(CommandError);
    expect(keys(behavior.variables)).toEqual(['a', 'b']);
  });

  it('moves a field inside a struct inside a struct, the rest of the declaration as it was', () => {
    const f = makeProject();
    const behavior = makeBehavior(f, 'B');
    f.stack.execute(new AddVariableCommand(behavior.id, 'hero', 'struct'));
    for (const field of ['name', 'pos'])
      f.stack.execute(
        new AddStructFieldCommand(
          behavior.id,
          'hero',
          field === 'pos' ? { key: field, kind: 'struct', fields: [] } : { key: field, kind: 'text' },
        ),
      );
    for (const field of ['x', 'y', 'z'])
      f.stack.execute(
        new AddStructFieldCommand(behavior.id, 'hero', { key: field, kind: 'number' }, ['pos']),
      );
    const hero = () => behavior.variables[0] as StructDef;
    const pos = () => hero().fields.find((field) => field.key === 'pos') as StructDef;
    const value = structuredClone(behavior.props.hero);

    f.stack.execute(new MoveStructFieldCommand(behavior.id, 'hero', 2, 0, ['pos']));
    expect(keys(pos().fields)).toEqual(['z', 'x', 'y']);
    expect(keys(hero().fields)).toEqual(['name', 'pos']);
    expect(behavior.props.hero).toEqual(value);

    f.stack.execute(new MoveStructFieldCommand(behavior.id, 'hero', 1, 0));
    expect(keys(hero().fields)).toEqual(['pos', 'name']);
    f.stack.undo();
    f.stack.undo();
    expect(keys(hero().fields)).toEqual(['name', 'pos']);
    expect(keys(pos().fields)).toEqual(['x', 'y', 'z']);
  });
});

/** `Loot` = { Name: "Coin", Amount: 1 } */
function lootType(f: ProjectFixture): StructAsset {
  const create = new CreateAssetCommand('struct', 'Loot');
  f.stack.execute(create);
  const id = create.asset.id;
  f.stack.execute(new AddVariableCommand(id, 'Name', 'text'));
  f.stack.execute(new AddVariableCommand(id, 'Amount', 'number'));
  f.stack.execute(new SetAssetPropertyCommand(id, 'Amount', 1));
  return create.asset as StructAsset;
}

describe('reordering the fields of a Struct asset', () => {
  it('reaches every place of the type: typed variables and the ports of Pack, edges kept', () => {
    const f = makeProject();
    const loot = lootType(f);
    const chest = makeBehavior(f, 'Chest');
    f.stack.execute(new AddVariableCommand(chest.id, 'drop', 'struct'));
    f.stack.execute(
      new SetStructTypeCommand({ kind: 'variable', ownerId: chest.id, key: 'drop', path: [] }, loot.id),
    );
    const g = graphEditor(f, chest);
    const pack = g.addNode('PackStruct');
    f.stack.execute(new SetStructTypeCommand({ kind: 'node', assetId: chest.id, nodeId: pack.id }, loot.id));
    const number = g.addNode('Number');
    g.connect(number, 'value', pack, 'Amount');
    const drop = () => chest.variables[0] as StructDef;

    f.stack.execute(new WithStructTypes(new MoveVariableCommand(loot.id, 1, 0)));
    expect(keys(loot.variables)).toEqual(['Amount', 'Name']);
    expect(keys(drop().fields)).toEqual(['Amount', 'Name']);
    expect(keys(pack.ports)).toEqual(['Amount', 'Name']);
    expect(chest.graph.edges.map((e) => `${e.from.port}>${e.to.port}`)).toEqual(['value>Amount']);
    expect(chest.props.drop).toEqual({ Name: '', Amount: 1 });

    f.stack.undo();
    expect(keys(drop().fields)).toEqual(['Name', 'Amount']);
    expect(keys(pack.ports)).toEqual(['Name', 'Amount']);
  });
});

/** Hands `a - b` back: two inputs whose order matters to the arithmetic, not to the wiring. */
function subtracter(f: ProjectFixture): BehaviorAsset {
  const asset = makeBehavior(f, 'Subtract');
  const edit = graphEditor(f, asset);
  const start = edit.addNode(BEHAVIOR_START);
  const end = edit.addNode(BEHAVIOR_END);
  f.stack.execute(new AddPortCommand(asset.id, start.id, { key: 'a', kind: 'number' }));
  f.stack.execute(new AddPortCommand(asset.id, start.id, { key: 'b', kind: 'number' }));
  f.stack.execute(new AddPortCommand(asset.id, end.id, { key: 'out1', kind: 'number' }));
  const minus = edit.addNode('Subtract');
  edit.wire([
    [start, 'exec', end, 'exec'],
    [start, 'a', minus, 'a'],
    [start, 'b', minus, 'b'],
    [minus, 'result', end, 'out1'],
  ]);
  return asset;
}

describe('reordering the ports of a start node', () => {
  it('changes the order on the calling node and nothing else: edges, values and result stay', () => {
    const f = makeProject();
    const callee = subtracter(f);
    const caller = makeBehavior(f, 'Caller', ['result']);
    const edit = graphEditor(f, caller);
    const onStart = edit.addNode('OnStart');
    const call = edit.addNode(RUN_BEHAVIOR, { [BEHAVIOR_PARAM]: callee.id, a: 10, b: 3 });
    const set = edit.variables(['result'], { write: true });
    edit.wire([
      [onStart, 'exec', call, 'exec'],
      [call, 'exec', set, 'exec'],
      [call, 'out1', set, 'result'],
    ]);
    const start = callee.graph.nodes.find((n) => n.type === BEHAVIOR_START)!;
    const edges = structuredClone(callee.graph.edges);
    const inputs = () => keys(resolveDef(call, caller.graph, graphLookup(f.project))!.inputs);
    const run = () => {
      const ctx = fakeContext({ variables: { result: 0 } });
      fire(new GraphInterpreter(caller.graph, graphLookup(f.project)), 'OnStart', ctx);
      return ctx.variables.result;
    };
    expect(inputs()).toEqual(['exec', 'a', 'b']);

    f.stack.execute(new MovePortCommand(callee.id, start.id, 1, 0));
    expect(keys(start.ports)).toEqual(['b', 'a']);
    expect(inputs()).toEqual(['exec', 'b', 'a']);
    expect(callee.graph.edges).toEqual(edges);
    expect(call.params).toMatchObject({ a: 10, b: 3 });
    expect(run()).toBe(7);

    f.stack.undo();
    expect(inputs()).toEqual(['exec', 'a', 'b']);
  });
});