"""时间深度与离线档位测试。"""

from datetime import UTC, datetime, timedelta

import pytest
from pydantic import ValidationError

from app.modules.time_sense.duration import (
    OfflineThresholds,
    classify_offline_band,
    compute_acquaintance_duration,
    format_duration_cn,
)


def test_acquaintance_duration_zero_days():
    anchor = datetime(2026, 7, 3, tzinfo=UTC)
    now = anchor
    d = compute_acquaintance_duration(anchor, now)
    assert d.total_days == 0
    assert "今天" in d.natural_language or "刚" in d.natural_language


def test_acquaintance_duration_287_days():
    anchor = datetime(2026, 7, 3, tzinfo=UTC) - timedelta(days=287)
    now = datetime(2026, 7, 3, tzinfo=UTC)
    d = compute_acquaintance_duration(anchor, now)
    assert d.total_days == 287
    assert d.years == 0
    assert d.months == 9
    assert d.days == 17  # 287 % 30 = 17（按 30 天/月近似）
    assert "287" in d.natural_language


def test_acquaintance_duration_one_year():
    anchor = datetime(2025, 7, 3, tzinfo=UTC)
    now = datetime(2026, 7, 3, tzinfo=UTC)
    d = compute_acquaintance_duration(anchor, now)
    assert d.total_days == 365
    assert d.years == 1


def test_format_duration_cn_100_days():
    # 100 天 = 3 个月 10 天（按 30 天/月近似），实现走月日分支
    assert format_duration_cn(100) == "3 个月 10 天（100 天）"


def test_format_duration_cn_365_days():
    text = format_duration_cn(365)
    assert "1 年" in text


def test_classify_offline_band_active():
    now = datetime(2026, 7, 3, 12, 0, tzinfo=UTC)
    last = now - timedelta(minutes=30)
    t = OfflineThresholds()
    result = classify_offline_band(last, now, t)
    assert result.band == "active"
    assert result.minutes == 30


def test_classify_offline_band_short_absence():
    now = datetime(2026, 7, 3, 12, 0, tzinfo=UTC)
    last = now - timedelta(hours=5)
    result = classify_offline_band(last, now, OfflineThresholds())
    assert result.band == "short_absence"


def test_classify_offline_band_reunion_impact():
    now = datetime(2026, 7, 3, 12, 0, tzinfo=UTC)
    last = now - timedelta(days=5)
    result = classify_offline_band(last, now, OfflineThresholds())
    assert result.band == "reunion_impact"
    assert result.reunion_intensity > 0.5


def test_classify_offline_boundary_59min_is_active():
    now = datetime(2026, 7, 3, 12, 0, tzinfo=UTC)
    last = now - timedelta(minutes=59)
    assert classify_offline_band(last, now, OfflineThresholds()).band == "active"


def test_classify_offline_boundary_60min_is_short_absence():
    now = datetime(2026, 7, 3, 12, 0, tzinfo=UTC)
    last = now - timedelta(minutes=60)
    assert classify_offline_band(last, now, OfflineThresholds()).band == "short_absence"


def test_offline_thresholds_violates_monotonicity():
    with pytest.raises(ValidationError):
        OfflineThresholds(active_minutes=100, short_absence_minutes=50)


def test_reunion_intensity_clamped_05_to_1():
    now = datetime(2026, 7, 3, 12, 0, tzinfo=UTC)
    # 刚过 reunion_impact 阈值（4320 分钟 + 1 分钟）
    last = now - timedelta(minutes=4321)
    intensity = classify_offline_band(last, now, OfflineThresholds()).reunion_intensity
    assert 0.5 <= intensity <= 1.0

    # 超大间隔：30 天 = 43200 分钟，应趋近 1.0
    last_far = now - timedelta(minutes=43200)
    intensity_far = classify_offline_band(last_far, now, OfflineThresholds()).reunion_intensity
    assert intensity_far > 0.9