from types import SimpleNamespace

from pretix_selective_export.presets import (
    SETTINGS_KEY,
    get_presets,
    normalize_presets,
    save_preset,
)


class DummySettings:
    def __init__(self, initial=None):
        self._data = dict(initial or {})

    def get(self, key, as_type=None, default=None):
        return self._data.get(key, default)

    def set(self, key, value):
        self._data[key] = value


def make_holder(initial=None):
    return SimpleNamespace(settings=DummySettings(initial))


def test_normalize_presets_discards_invalid_entries():
    normalized = normalize_presets(
        {
            "  Useful  ": {
                "fields": [" order.code ", "order.code", "", 12],
                "fieldOrder": ["position.attendee_name_cached", "position.attendee_name_cached"],
                "events": [" TE1 ", ""],
            },
            "": {"fields": ["ignored"]},
            "Other": "invalid",
        }
    )

    assert normalized == {
        "Useful": {
            "fields": ["order.code", "12"],
            "fieldOrder": ["position.attendee_name_cached"],
            "events": ["TE1"],
        },
        "Other": {
            "fields": [],
            "fieldOrder": [],
            "events": [],
        },
    }


def test_save_preset_persists_to_settings_holder():
    holder = make_holder()

    name, preset = save_preset(
        holder,
        " Shared preset ",
        {
            "fields": ["order.code", "position.attendee_name_cached"],
            "fieldOrder": ["position.attendee_name_cached", "order.code"],
            "events": ["TE1"],
        },
    )

    assert name == "Shared preset"
    assert preset["fields"] == ["order.code", "position.attendee_name_cached"]
    assert get_presets(holder) == {
        "Shared preset": {
            "fields": ["order.code", "position.attendee_name_cached"],
            "fieldOrder": ["position.attendee_name_cached", "order.code"],
            "events": ["TE1"],
        }
    }
    assert holder.settings.get(SETTINGS_KEY)["Shared preset"]["events"] == ["TE1"]


def test_save_preset_overwrites_existing_name():
    holder = make_holder(
        {
            SETTINGS_KEY: {
                "Shared preset": {
                    "fields": ["order.code"],
                    "fieldOrder": ["order.code"],
                    "events": [],
                }
            }
        }
    )

    save_preset(
        holder,
        "Shared preset",
        {
            "fields": ["position.attendee_name_cached"],
            "fieldOrder": ["position.attendee_name_cached"],
            "events": ["TE1"],
        },
    )

    assert get_presets(holder)["Shared preset"] == {
        "fields": ["position.attendee_name_cached"],
        "fieldOrder": ["position.attendee_name_cached"],
        "events": ["TE1"],
    }


def test_save_preset_requires_non_blank_name():
    holder = make_holder()

    try:
        save_preset(holder, "   ", {"fields": []})
    except ValueError as exc:
        assert str(exc) == "Preset name is required."
    else:
        raise AssertionError("Expected ValueError for blank preset name")