import os
import re
import sys
import tempfile
import unittest

sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
import unity_assets as ua


class TestGuid(unittest.TestCase):
    def test_new_guid_is_32_hex(self):
        g = ua.new_guid()
        self.assertTrue(re.fullmatch(r"[0-9a-f]{32}", g))

    def test_guid_for_reuses_existing_meta(self):
        with tempfile.TemporaryDirectory() as d:
            asset = os.path.join(d, "a.png")
            with open(asset + ".meta", "w") as f:
                f.write("fileFormatVersion: 2\nguid: 0123456789abcdef0123456789abcdef\n")
            self.assertEqual(ua.guid_for(asset), "0123456789abcdef0123456789abcdef")

    def test_guid_for_generates_when_no_meta(self):
        with tempfile.TemporaryDirectory() as d:
            g = ua.guid_for(os.path.join(d, "b.png"))
            self.assertTrue(re.fullmatch(r"[0-9a-f]{32}", g))


class TestTemplates(unittest.TestCase):
    def test_texture_meta_srgb_on_off(self):
        on = ua.texture_meta("a" * 32, srgb=True, max_size=2048)
        off = ua.texture_meta("b" * 32, srgb=False, max_size=2048)
        self.assertIn("sRGBTexture: 1", on)
        self.assertIn("sRGBTexture: 0", off)
        self.assertIn("maxTextureSize: 2048", on)
        self.assertIn("guid: " + "a" * 32, on)

    def test_material_yaml_refs_and_keyword(self):
        y = ua.material_yaml("tong_wood", "s" * 32, "c" * 32, "d" * 32, alpha_test=True)
        self.assertIn("m_Name: tong_wood", y)
        self.assertIn("guid: " + "s" * 32, y)  # shader
        self.assertIn("guid: " + "c" * 32, y)  # base tex
        self.assertIn("guid: " + "d" * 32, y)  # mix tex
        self.assertIn("_ALPHATEST_ON", y)
        self.assertIn("_AlphaTest: 1", y)

    def test_material_yaml_no_keyword_when_opaque(self):
        y = ua.material_yaml("m", "s" * 32, "c" * 32, "d" * 32, alpha_test=False)
        self.assertNotIn("_ALPHATEST_ON", y)
        self.assertIn("_AlphaTest: 0", y)

    def test_model_meta_external_objects(self):
        m = ua.model_meta("e" * 32, [("wood", "f" * 32), ("iron", "1" * 32)])
        self.assertIn("name: wood", m)
        self.assertIn("guid: " + "f" * 32, m)
        self.assertIn("name: iron", m)
        self.assertIn("guid: " + "e" * 32, m)


class TestSanitize(unittest.TestCase):
    def test_safe_name(self):
        self.assertEqual(ua.safe_name("Mat 01.a/b"), "Mat_01_a_b")


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