from __future__ import annotations

import math
import random


from tools.humanize import (
    HumanizeConfig,
    jitter_duration,
    jitter_point,
    load_humanize_config,
    set_rng,
    swipe_waypoints,
)


def test_jitter_point_stays_within_radius():
    rng = random.Random(42)
    for _ in range(500):
        x, y = jitter_point(100, 200, radius=5.0, rng=rng)
        assert math.hypot(x - 100, y - 200) <= 5.0


def test_jitter_point_centered_on_input():
    rng = random.Random(0)
    xs = [jitter_point(0, 0, radius=4.0, rng=rng)[0] for _ in range(4000)]
    assert abs(sum(xs) / len(xs)) < 0.3


def test_jitter_duration_within_spread():
    rng = random.Random(3)
    for _ in range(200):
        v = jitter_duration(1000, spread=0.15, rng=rng)
        assert 850 <= v <= 1150


def test_jitter_duration_never_zero():
    rng = random.Random(9)
    for _ in range(100):
        assert jitter_duration(1, spread=0.5, rng=rng) >= 1


def test_swipe_waypoints_endpoints_exact_interior_offset():
    rng = random.Random(7)
    pts = swipe_waypoints((0, 0), (100, 0), curvature=0.2, n=4, rng=rng)
    assert pts[0] == (0, 0)
    assert pts[-1] == (100, 0)
    assert len(pts) == 6  # start + 4 interior + end
    assert any(abs(p[1]) > 1e-6 for p in pts[1:-1])


def test_swipe_waypoints_degenerate_short_path_returns_two_points():
    rng = random.Random(1)
    pts = swipe_waypoints((5, 5), (5, 5), curvature=0.2, n=8, rng=rng)
    assert pts == [(5, 5), (5, 5)]


def test_load_config_defaults_when_unset():
    cfg = load_humanize_config(env={})
    assert cfg == HumanizeConfig()


def test_load_config_disabled():
    cfg = load_humanize_config(env={"APEX_HUMANIZE_ENABLED": "false"})
    assert cfg.enabled is False


def test_load_config_overrides():
    cfg = load_humanize_config(
        env={
            "APEX_HUMANIZE_TAP_RADIUS_PX": "9",
            "APEX_HUMANIZE_SWIPE_CURVATURE": "0.3",
            "APEX_HUMANIZE_SWIPE_WAYPOINTS": "12",
            "APEX_HUMANIZE_DURATION_SPREAD": "0.2",
        }
    )
    assert cfg.tap_radius_px == 9.0
    assert cfg.swipe_curvature == 0.3
    assert cfg.swipe_waypoints == 12
    assert cfg.duration_spread == 0.2


def test_set_rng_makes_output_reproducible():
    set_rng(random.Random(99))
    a = jitter_point(0, 0, radius=5.0, rng=random.Random(99))
    set_rng(None)  # reset to default rng
    assert isinstance(a, tuple) and len(a) == 2