"""Tests for GUI profile persistence."""

from __future__ import annotations

import unittest

from python_app.models.gui_profile_model import (
    GuiPassThroughStateModel,
    GuiProcessingStateModel,
    GuiProfileModel,
    GuiStateModel,
)


class GuiProfileCodecTest(unittest.TestCase):
    def test_pass_through_combo_filter_round_trips(self) -> None:
        profile = GuiProfileModel(
            gui=GuiStateModel(
                processing=GuiProcessingStateModel(
                    pass_through=GuiPassThroughStateModel(combo_filter="0:0,1:0")
                )
            )
        )

        encoded = profile.to_dict()
        decoded = GuiProfileModel.from_dict(encoded)

        self.assertIsNotNone(decoded.gui)
        assert decoded.gui is not None
        self.assertEqual(decoded.gui.processing.pass_through.combo_filter, "0:0,1:0")
        self.assertEqual(encoded["gui"]["processing"]["pass_through"]["combo_filter"], "0:0,1:0")

    def test_default_profile_round_trips_idempotently(self) -> None:
        # Full-subtree idempotence catches field-drop/mis-map regressions across every
        # sub-model, which the single combo_filter round-trip above cannot.
        once = GuiProfileModel().to_dict()
        twice = GuiProfileModel.from_dict(once).to_dict()
        self.assertEqual(once["gui"], twice["gui"])

    def test_missing_gui_section_yields_none(self) -> None:
        self.assertIsNone(GuiProfileModel.from_dict({}).gui)

    def test_unsupported_version_is_rejected(self) -> None:
        with self.assertRaisesRegex(ValueError, "version"):
            GuiProfileModel.from_dict({"gui": {"version": 2}})

    def test_invalid_combo_mode_is_rejected(self) -> None:
        with self.assertRaisesRegex(ValueError, "combo_mode"):
            GuiProfileModel.from_dict({"gui": {"switches": {"combo_mode": "bogus"}}})

    def test_wrong_typed_field_is_rejected(self) -> None:
        with self.assertRaises(ValueError):  # combos_text must be a JSON string, not a number
            GuiProfileModel.from_dict({"gui": {"switches": {"combos_text": 123}}})

    def test_legacy_gpr_payload_migrates_selected_mode(self) -> None:
        # An old payload that selects 'gpr' but carries a legacy root gpr.mode is migrated.
        decoded = GuiProfileModel.from_dict({
            "gui": {"processing": {"selected_mode": "gpr"}},
            "gpr": {"relative_permittivity": 4.0, "mode": "point"},
        })
        assert decoded.gui is not None
        self.assertEqual(decoded.gui.processing.selected_mode, "legacy_gpr")

    def test_modern_gpr_selection_is_not_migrated(self) -> None:
        decoded = GuiProfileModel.from_dict({"gui": {"processing": {"selected_mode": "gpr"}}})
        assert decoded.gui is not None
        self.assertEqual(decoded.gui.processing.selected_mode, "gpr")


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