import unittest
from pathlib import Path
from tempfile import TemporaryDirectory

from sn_plan41.ui.tab_a_logic import TabALogic # type: ignore
from sn_basis.functions.variable_wrapper import get_variable # type: ignore
from sn_basis.functions.sys_wrapper import file_exists # type: ignore


class TestTabALogic(unittest.TestCase):

    # -----------------------------------------------------
    # 1. Verfahrens-DB setzen und laden
    # -----------------------------------------------------
    def test_verfahrens_db_set_and_load(self):
        logic = TabALogic()

        with TemporaryDirectory() as tmp:
            db_path = Path(tmp) / "test.gpkg"
            db_path.write_text("")

            logic.set_verfahrens_db(str(db_path))

            stored = get_variable("verfahrens_db", scope="project")
            self.assertEqual(stored, str(db_path))

            loaded = logic.load_verfahrens_db()
            self.assertEqual(loaded, str(db_path))

    # -----------------------------------------------------
    # 2. Verfahrens-DB löschen
    # -----------------------------------------------------
    def test_verfahrens_db_clear(self):
        logic = TabALogic()

        logic.set_verfahrens_db(None)

        stored = get_variable("verfahrens_db", scope="project")
        self.assertEqual(stored, "")

    # -----------------------------------------------------
    # 3. Neue Verfahrens-DB anlegen
    # -----------------------------------------------------
    def test_create_new_verfahrens_db(self):
        logic = TabALogic()

        with TemporaryDirectory() as tmp:
            db_path = Path(tmp) / "neu.gpkg"

            result = logic.create_new_verfahrens_db(str(db_path))

            self.assertTrue(result)
            self.assertTrue(file_exists(db_path))

            stored = get_variable("verfahrens_db", scope="project")
            self.assertEqual(stored, str(db_path))

    def test_create_new_verfahrens_db_with_none_path(self):
        logic = TabALogic()
        result = logic.create_new_verfahrens_db(None)
        self.assertFalse(result)



    # -----------------------------------------------------
    # 4. Linkliste setzen und laden
    # -----------------------------------------------------
    def test_linkliste_set_and_load(self):
        logic = TabALogic()

        with TemporaryDirectory() as tmp:
            link_path = Path(tmp) / "links.xlsx"
            link_path.write_text("dummy")

            logic.set_linkliste(str(link_path))

            stored = get_variable("linkliste", scope="project")
            self.assertEqual(stored, str(link_path))

            loaded = logic.load_linkliste()
            self.assertEqual(loaded, str(link_path))

    # -----------------------------------------------------
    # 5. Linkliste löschen
    # -----------------------------------------------------
    def test_linkliste_clear(self):
        logic = TabALogic()

        logic.set_linkliste(None)

        stored = get_variable("linkliste", scope="project")
        self.assertEqual(stored, "")

    # -----------------------------------------------------
    # 6. Layer-ID speichern
    # -----------------------------------------------------
    def test_verfahrensgebiet_layer_id_storage(self):
        logic = TabALogic()

        class MockLayer:
            def id(self):
                return "layer-123"

        logic.save_verfahrensgebiet_layer(MockLayer())

        stored = get_variable("verfahrensgebiet_layer", scope="project")
        self.assertEqual(stored, "layer-123")

    # -----------------------------------------------------
    # 7. Ungültiger Layer wird ignoriert
    # -----------------------------------------------------
    def test_invalid_layer_is_rejected(self):
        logic = TabALogic()

        class InvalidLayer:
            pass

        logic.save_verfahrensgebiet_layer(InvalidLayer())

        stored = get_variable("verfahrensgebiet_layer", scope="project")
        self.assertEqual(stored, "")
    #-----------------------------------------------------
    # 8. Layer-ID wirft Exception
    #----------------------------------------------------
    def test_layer_id_raises_exception(self):
        logic = TabALogic()

        class BadLayer:
            def id(self):
                raise RuntimeError("boom")

        logic.save_verfahrensgebiet_layer(BadLayer())

        stored = get_variable("verfahrensgebiet_layer", scope="project")
        self.assertEqual(stored, "")
    # -----------------------------------------------------
    # 11. Layer ID wird leer zurückgegeben
    # ----------------------------------------------------- 
    def test_layer_id_returns_empty(self):
        logic = TabALogic()

        class EmptyLayer:
            def id(self):
                return ""

        logic.save_verfahrensgebiet_layer(EmptyLayer())

        stored = get_variable("verfahrensgebiet_layer", scope="project")
        self.assertEqual(stored, "")


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