import unittest
from typing import cast

from server.Dataset import Dataset
from server.GameBoard import GameBoard

class DummySnake:
  def get_history(self):
    return [
      {"turn": 1, "data": [{"score": 1}]},
      {"turn": 2, "data": [{"score": 2}]},
    ]

class DummyGameBoard:
  def __init__(self, winners):
    self.id = "game-1"
    self.map = "standard"
    self.winner_snake_names = winners
    self.snake_class = DummySnake()
    self.turns = [
      {"turn": 1, "move": "up", "game_board": {"width": 11, "height": 11}},
      {"turn": 2, "move": "left", "game_board": {"width": 11, "height": 11}},
    ]

  def get_type_of_game(self):
    return {"name": "standard", "is_ladder": False}

class TestDataset(unittest.TestCase):
  def test_build_only_good_moves_for_wins(self):
    dataset = Dataset(cast(GameBoard, DummyGameBoard(["me"])))
    payload = dataset.build(only_good_moves=True)

    self.assertTrue(payload["did_win"])
    self.assertEqual(payload["total_samples"], 2)
    self.assertTrue(all(sample["is_good_move"] for sample in payload["samples"]))

  def test_build_returns_no_samples_for_losses_when_only_good(self):
    dataset = Dataset(cast(GameBoard, DummyGameBoard(["enemy"])))
    payload = dataset.build(only_good_moves=True)

    self.assertFalse(payload["did_win"])
    self.assertEqual(payload["total_samples"], 0)

  def test_labels_by_turn(self):
    winner_labels = Dataset(cast(GameBoard, DummyGameBoard(["me"]))).labels_by_turn()
    loser_labels = Dataset(cast(GameBoard, DummyGameBoard(["enemy"]))).labels_by_turn()

    self.assertEqual(winner_labels, {1: True, 2: True})
    self.assertEqual(loser_labels, {1: False, 2: False})

if __name__ == "__main__":
  unittest.main()