"""Tests for parseHelpers module."""

import unittest

from imago.data.enums import Player
from imago.engine import parseHelpers

TEST_BOARD_SIZE = 19

class TestParseHelpers(unittest.TestCase):
    """Test parseHelpers module."""

    def testParseMove(self):
        """Test parsing of GtpMove"""

        wrongMoves = [
                ["B"],
                ["A1"],
                ["B", "A1", "W"]
                ]
        for move in wrongMoves:
            self.assertRaises(
                RuntimeError,
                parseHelpers.parseMove,
                move, TEST_BOARD_SIZE
            )

        parsedMove = parseHelpers.parseMove(["B", "t1"], TEST_BOARD_SIZE)
        targetMove = parseHelpers.GtpMove(Player.BLACK, [18, 18])
        self.assertEqual(parsedMove.color, targetMove.color)
        self.assertEqual(parsedMove.vertex, targetMove.vertex)

    def testParseColor(self):
        """Test parsing of color"""
        self.assertEqual(parseHelpers.parseColor("b"), Player.BLACK)
        self.assertEqual(parseHelpers.parseColor("B"), Player.BLACK)
        self.assertEqual(parseHelpers.parseColor("w"), Player.WHITE)
        self.assertEqual(parseHelpers.parseColor("W"), Player.WHITE)

        self.assertRaises(RuntimeError, parseHelpers.parseColor, "bw")
        self.assertRaises(RuntimeError, parseHelpers.parseColor, "wb")

    def testParseVertexWrongInputs(self):
        """Test wrong inputs for parseVertex."""
        inputs = ( "a", "1", "1a", "aa1", "a0", "u1", "a"+str(TEST_BOARD_SIZE+1) )
        for text in inputs:
            self.assertRaises(
                RuntimeError,
                parseHelpers.parseVertex,
                text, TEST_BOARD_SIZE
            )

    def testParseVertexCorrectInputs(self):
        """Test correct inputs and their resulting coordinates for parseVertex."""
        self.assertEqual(parseHelpers.parseVertex(
            "a1", TEST_BOARD_SIZE),
            [18,0])
        self.assertEqual(parseHelpers.parseVertex(
            "b1", TEST_BOARD_SIZE),
            [18,1])
        self.assertEqual(parseHelpers.parseVertex(
            "a2", TEST_BOARD_SIZE),
            [17,0])
        self.assertEqual(parseHelpers.parseVertex(
            "b2", TEST_BOARD_SIZE),
            [17,1])

        self.assertEqual(parseHelpers.parseVertex(
            "T1", TEST_BOARD_SIZE),
            [18,18])
        self.assertEqual(parseHelpers.parseVertex(
            "T19", TEST_BOARD_SIZE),
            [0,18])
        self.assertEqual(parseHelpers.parseVertex(
            "A19", TEST_BOARD_SIZE),
            [0,0])

        self.assertEqual(parseHelpers.parseVertex(
            "pass", TEST_BOARD_SIZE),
            "pass")

    def testVertexToString(self):
        """Test converting vertices to strings."""
        self.assertEqual(parseHelpers.vertexToString([0,0], TEST_BOARD_SIZE), "A19")
        self.assertEqual(parseHelpers.vertexToString([1,0], TEST_BOARD_SIZE), "A18")
        self.assertEqual(parseHelpers.vertexToString([2,0], TEST_BOARD_SIZE), "A17")
        self.assertEqual(parseHelpers.vertexToString([0,1], TEST_BOARD_SIZE), "B19")
        self.assertEqual(parseHelpers.vertexToString([0,2], TEST_BOARD_SIZE), "C19")
        self.assertEqual(parseHelpers.vertexToString([0,18], TEST_BOARD_SIZE), "T19")
        self.assertEqual(parseHelpers.vertexToString([18,0], TEST_BOARD_SIZE), "A1")
        self.assertEqual(parseHelpers.vertexToString([18,18], TEST_BOARD_SIZE), "T1")

        self.assertEqual(parseHelpers.vertexToString("pass", TEST_BOARD_SIZE), "pass")

        wrongVertices = [
            [-1,0],
            [0,-1],
            [-1,-1],
            [19,0],
            [0,19],
            [19,19],
            [0],
            [0,0,0]
        ]
        for vertex in wrongVertices:
            self.assertRaises(
                RuntimeError,
                parseHelpers.vertexToString,
                vertex, TEST_BOARD_SIZE
            )

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