"""Tests for the lis3dh config cross-checks and interrupt threshold maths."""

from __future__ import annotations

import logging

import pytest

from esphome.components.lis3dh.motion import (
    CONF_ACCELEROMETER_ODR,
    CONF_ACCELEROMETER_RANGE,
    CONF_DURATION,
    CONF_HIGH_PASS_FILTER,
    CONF_INTERRUPT,
    CONF_OPERATING_MODE,
    CONF_THRESHOLD,
    _duration_register,
    _threshold_register,
    _validate_interrupt,
    _validate_odr_mode,
)
import esphome.config_validation as cv
from esphome.core import TimePeriod


def _interrupt_config(
    range_key: str,
    odr_key: str,
    threshold_g: float,
    duration_ms: int,
    high_pass: bool = True,
) -> dict:
    return {
        CONF_ACCELEROMETER_RANGE: range_key,
        CONF_ACCELEROMETER_ODR: odr_key,
        CONF_INTERRUPT: {
            CONF_THRESHOLD: threshold_g,
            CONF_DURATION: TimePeriod(milliseconds=duration_ms),
            CONF_HIGH_PASS_FILTER: high_pass,
        },
    }


@pytest.mark.parametrize("mode", ["NORMAL", "HIGH_RESOLUTION"])
def test_1620hz_needs_low_power(mode: str) -> None:
    """1620Hz exists only in low power mode."""
    config = {CONF_ACCELEROMETER_ODR: "1620HZ", CONF_OPERATING_MODE: mode}
    with pytest.raises(cv.Invalid, match="only available with"):
        _validate_odr_mode(config)


def test_1344hz_is_rejected_in_low_power() -> None:
    """The 1344Hz code runs at 5376Hz in low power mode."""
    config = {CONF_ACCELEROMETER_ODR: "1344HZ", CONF_OPERATING_MODE: "LOW_POWER"}
    with pytest.raises(cv.Invalid, match="not available with"):
        _validate_odr_mode(config)


def test_1620hz_low_power_is_accepted() -> None:
    """The one valid 1620Hz combination passes through unchanged."""
    config = {CONF_ACCELEROMETER_ODR: "1620HZ", CONF_OPERATING_MODE: "LOW_POWER"}
    assert _validate_odr_mode(config) is config


@pytest.mark.parametrize(
    ("threshold_g", "range_key", "expected"),
    [
        (0.0, "2G", 1),
        (0.05, "16G", 1),
        (1.1, "2G", 69),
        (0.2, "2G", 13),
        (2.032, "2G", 127),
        (23.622, "16G", 127),
    ],
)
def test_threshold_register(threshold_g: float, range_key: str, expected: int) -> None:
    """INT1_THS is the nearest step and never zero."""
    assert _threshold_register(threshold_g, range_key) == expected


@pytest.mark.parametrize(
    ("threshold_g", "range_key"),
    [(2.04, "2G"), (3.0, "2G"), (4.07, "4G"), (23.7, "16G")],
)
def test_threshold_above_range_is_rejected(threshold_g: float, range_key: str) -> None:
    """A threshold the range cannot represent would never fire, so it fails validation."""
    config = _interrupt_config(range_key, "100HZ", threshold_g, 0)
    with pytest.raises(cv.Invalid, match="'threshold' can be at most"):
        _validate_interrupt(config)


def test_threshold_within_range_is_accepted() -> None:
    """The largest representable threshold is still valid."""
    config = _interrupt_config("2G", "100HZ", 2.032, 0)
    assert _validate_interrupt(config) is config


@pytest.mark.parametrize(
    ("duration_ms", "odr_key", "expected"),
    [
        (0, "100HZ", 0),
        (20, "100HZ", 2),
        (1, "1620HZ", 2),
        (10000, "1HZ", 10),
        (4, "100HZ", 0),
    ],
)
def test_duration_register(duration_ms: int, odr_key: str, expected: int) -> None:
    """INT1_DURATION is the nearest number of samples at the data rate."""
    assert _duration_register(duration_ms, odr_key) == expected


@pytest.mark.parametrize(
    ("duration_ms", "odr_key"), [(1280, "100HZ"), (128000, "1HZ"), (79, "1620HZ")]
)
def test_duration_above_register_is_rejected(duration_ms: int, odr_key: str) -> None:
    """A duration that needs more than 127 samples fails validation."""
    config = _interrupt_config("2G", odr_key, 1.1, duration_ms)
    with pytest.raises(cv.Invalid, match="'duration' can be at most"):
        _validate_interrupt(config)


def test_duration_at_register_limit_is_accepted() -> None:
    """127 samples is the largest INT1_DURATION value."""
    config = _interrupt_config("2G", "100HZ", 1.1, 1270)
    assert _validate_interrupt(config) is config


def test_sub_gravity_threshold_without_filter_warns(
    caplog: pytest.LogCaptureFixture,
) -> None:
    """Gravity alone can hold the pad asserted below 1g unless the high-pass filter is on."""
    config = _interrupt_config("2G", "100HZ", 0.5, 0, high_pass=False)
    with caplog.at_level(logging.WARNING):
        assert _validate_interrupt(config) is config
    assert "high_pass_filter: true" in caplog.text


@pytest.mark.parametrize(("threshold_g", "high_pass"), [(1.1, False), (0.5, True)])
def test_threshold_without_gravity_problem_is_silent(
    caplog: pytest.LogCaptureFixture, threshold_g: float, high_pass: bool
) -> None:
    """Above 1g, or with the filter on, no warning is logged."""
    config = _interrupt_config("2G", "100HZ", threshold_g, 0, high_pass=high_pass)
    with caplog.at_level(logging.WARNING):
        _validate_interrupt(config)
    assert caplog.text == ""