"""Ручные конверсии/диапазоны (ConversionSet) без HA-рантайма."""
from __future__ import annotations

from custom_components.fglair.overrides import ConversionSet, LinearOverride
from pyfglair import Prop, Template


def test_identity_keeps_api_units():
    conversions = ConversionSet(Template.A, {}, 5)
    assert conversions.to_display(Prop.DISPLAY_TEMPERATURE, 200) == 200
    assert conversions.to_display(Prop.ADJUST_TEMPERATURE, 220) == 220
    assert conversions.from_display(Prop.ADJUST_TEMPERATURE, 220) == 220
    assert conversions.temperature_range() == (160, 300)


def test_linear_override_roundtrip_and_clamp():
    override = LinearOverride(
        num=1, den=1, offset=5, min_value=170, max_value=280
    )
    conversions = ConversionSet(
        Template.A, {Prop.ADJUST_TEMPERATURE: override}, 5
    )
    assert conversions.to_display(Prop.ADJUST_TEMPERATURE, 220) == 225
    assert conversions.from_display(Prop.ADJUST_TEMPERATURE, 225) == 220
    assert conversions.clamp(Prop.ADJUST_TEMPERATURE, 100) == 170
    assert conversions.clamp(Prop.ADJUST_TEMPERATURE, 999) == 280
    assert conversions.temperature_range() == (170, 280)


def test_linear_override_scaled():
    override = LinearOverride(num=2, den=4, offset=0)
    conversions = ConversionSet(
        Template.A, {Prop.ADJUST_TEMPERATURE: override}, 5
    )
    assert conversions.to_display(Prop.ADJUST_TEMPERATURE, 200) == 100
    assert conversions.from_display(Prop.ADJUST_TEMPERATURE, 100) == 200


def test_scaled_override_clamped_to_table():
    """display = raw/2: таблица A -100..450 → достижимо -50..225."""
    override = LinearOverride(
        num=1, den=2, offset=0, min_value=160, max_value=300
    )
    conversions = ConversionSet(
        Template.A, {Prop.ADJUST_TEMPERATURE: override}, 5
    )
    assert conversions.temperature_range() == (160, 225)
    assert conversions.clamp(Prop.ADJUST_TEMPERATURE, 250) == 225
    assert conversions.from_display(Prop.ADJUST_TEMPERATURE, 250) == 450
    assert conversions.from_display(Prop.ADJUST_TEMPERATURE, 225) == 450


def test_from_entry_parses_spec():
    conversions = ConversionSet.from_entry(
        {
            "template": "B",
            "temp_step": 10,
            "overrides": {
                "adjust_temperature": {
                    "num": 2,
                    "den": 4,
                    "offset": 5,
                    "min": 170,
                    "max": 280,
                }
            },
        }
    )
    assert conversions.template == Template.B
    assert conversions.step_tenths == 10
    # display = raw/2 + 5: таблица -100..450 → -45..230, override 170..280
    # → достижимо 170..230.
    assert conversions.temperature_range() == (170, 230)
    override = conversions.override(Prop.ADJUST_TEMPERATURE)
    assert (override.num, override.den, override.offset) == (2, 4, 5)
    assert conversions.override(Prop.FAN_SPEED).identity


def test_from_entry_defaults():
    conversions = ConversionSet.from_entry({"template": "F"})
    assert conversions.step_tenths == 5
    assert conversions.temperature_range() == (160, 300)