'use strict';

import { actions } from './actions.js';


const [
  move_forward, move_backward, 
  turn_left, turn_right,
  place,
  ...rest
] = actions;


test("move forward", () => {
  const n = { id: 0, x: 0, y: 0, flags: { orientation: 'n' } };
  const s = { id: 0, x: 0, y: 0, flags: { orientation: 's' } };
  const e = { id: 0, x: 0, y: 0, flags: { orientation: 'e' } };
  const w = { id: 0, x: 0, y: 0, flags: { orientation: 'w' } };

  expect(move_forward.propose(null, n, [1])).toEqual([
    { agent_changes: [{ agent_id: 0, x: 0, y: -1 }] },
  ]);
  expect(move_forward.propose(null, s, [1])).toEqual([
    { agent_changes: [{ agent_id: 0, x: 0, y: 1 }] },
  ]);
  expect(move_forward.propose(null, e, [1])).toEqual([
    { agent_changes: [{ agent_id: 0, x: 1, y: 0 }] },
  ]);
  expect(move_forward.propose(null, w, [1])).toEqual([
    { agent_changes: [{ agent_id: 0, x: -1, y: 0 }] },
  ]);

  expect(move_forward.propose(null, n, [0])).toEqual([]);
  expect(move_forward.propose(null, s, [-1])).toEqual([]);
  expect(move_forward.propose(null, e, [0])).toEqual([]);
  expect(move_forward.propose(null, w, [-1])).toEqual([]);
});


test("move backward", () => {
  const n = { id: 0, x: 0, y: 0, flags: { orientation: 'n' } };
  const s = { id: 0, x: 0, y: 0, flags: { orientation: 's' } };
  const e = { id: 0, x: 0, y: 0, flags: { orientation: 'e' } };
  const w = { id: 0, x: 0, y: 0, flags: { orientation: 'w' } };

  expect(move_backward.propose(null, n, [1])).toEqual([
    { agent_changes: [{ agent_id: 0, x: 0, y: 1 }] },
  ]);
  expect(move_backward.propose(null, s, [1])).toEqual([
    { agent_changes: [{ agent_id: 0, x: 0, y: -1 }] },
  ]);
  expect(move_backward.propose(null, e, [1])).toEqual([
    { agent_changes: [{ agent_id: 0, x: -1, y: 0 }] },
  ]);
  expect(move_backward.propose(null, w, [1])).toEqual([
    { agent_changes: [{ agent_id: 0, x: 1, y: 0 }] },
  ]);

  expect(move_backward.propose(null, n, [0])).toEqual([]);
  expect(move_backward.propose(null, s, [-1])).toEqual([]);
  expect(move_backward.propose(null, e, [0])).toEqual([]);
  expect(move_backward.propose(null, w, [-1])).toEqual([]);
});


test("turn_left", () => {
  const n = { id: 0, x: 0, y: 0, flags: { orientation: 'n' } };
  const s = { id: 0, x: 0, y: 0, flags: { orientation: 's' } };
  const e = { id: 0, x: 0, y: 0, flags: { orientation: 'e' } };
  const w = { id: 0, x: 0, y: 0, flags: { orientation: 'w' } };

  expect(turn_left.propose(null, n, [1])).toEqual([
    { agent_changes: [{ agent_id: 0, flags: { orientation: 'w' } }] },
  ]);
  expect(turn_left.propose(null, s, [1])).toEqual([
    { agent_changes: [{ agent_id: 0, flags: { orientation: 'e' } }] },
  ]);
  expect(turn_left.propose(null, e, [1])).toEqual([
    { agent_changes: [{ agent_id: 0, flags: { orientation: 'n' } }] },
  ]);
  expect(turn_left.propose(null, w, [1])).toEqual([
    { agent_changes: [{ agent_id: 0, flags: { orientation: 's' } }] },
  ]);

  expect(turn_left.propose(null, n, [0])).toEqual([]);
  expect(turn_left.propose(null, s, [-1])).toEqual([]);
  expect(turn_left.propose(null, e, [0])).toEqual([]);
  expect(turn_left.propose(null, w, [-1])).toEqual([]);
});


test("turn_right", () => {
  const n = { id: 0, x: 0, y: 0, flags: { orientation: 'n' } };
  const s = { id: 0, x: 0, y: 0, flags: { orientation: 's' } };
  const e = { id: 0, x: 0, y: 0, flags: { orientation: 'e' } };
  const w = { id: 0, x: 0, y: 0, flags: { orientation: 'w' } };

  expect(turn_right.propose(null, n, [1])).toEqual([
    { agent_changes: [{ agent_id: 0, flags: { orientation: 'e' } }] },
  ]);
  expect(turn_right.propose(null, s, [1])).toEqual([
    { agent_changes: [{ agent_id: 0, flags: { orientation: 'w' } }] },
  ]);
  expect(turn_right.propose(null, e, [1])).toEqual([
    { agent_changes: [{ agent_id: 0, flags: { orientation: 's' } }] },
  ]);
  expect(turn_right.propose(null, w, [1])).toEqual([
    { agent_changes: [{ agent_id: 0, flags: { orientation: 'n' } }] },
  ]);

  expect(turn_right.propose(null, n, [0])).toEqual([]);
  expect(turn_right.propose(null, s, [-1])).toEqual([]);
  expect(turn_right.propose(null, e, [0])).toEqual([]);
  expect(turn_right.propose(null, w, [-1])).toEqual([]);
});


test("place", () => {
  const n = { id: 0, x: 0, y: 0, flags: { orientation: 'n' } };
  const s = { id: 0, x: 0, y: 0, flags: { orientation: 's' } };
  const e = { id: 0, x: 0, y: 0, flags: { orientation: 'e' } };
  const w = { id: 0, x: 0, y: 0, flags: { orientation: 'w' } };

  expect(place.propose(null, n, [1])).toEqual([
    { lattice_changes: [
      { 
        x: 0, y: -1, from: 'empty', to: 'mutable', 
        flags: { emit: [1, 0, 0, 0, 0, 0, 0, 0] } 
      }
    ]}
  ]);
  expect(place.propose(null, s, [1])).toEqual([
    { lattice_changes: [
      { 
        x: 0, y: 1, from: 'empty', to: 'mutable', 
        flags: { emit: [1, 0, 0, 0, 0, 0, 0, 0] } 
      }
    ]}
  ]);
  expect(place.propose(null, e, [1])).toEqual([
    { lattice_changes: [
      { 
        x: 1, y: 0, from: 'empty', to: 'mutable', 
        flags: { emit: [1, 0, 0, 0, 0, 0, 0, 0] } 
      }
    ]}
  ]);
  expect(place.propose(null, w, [1])).toEqual([
    { lattice_changes: [
      { 
        x: -1, y: 0, from: 'empty', to: 'mutable', 
        flags: { emit: [1, 0, 0, 0, 0, 0, 0, 0] } 
      }
    ]}
  ]);

  expect(place.propose(null, n, [0])).toEqual([]);
  expect(place.propose(null, s, [-1])).toEqual([]);
  expect(place.propose(null, e, [0])).toEqual([]);
  expect(place.propose(null, w, [-1])).toEqual([]);
});