from datetime import UTC, datetime, timedelta
from types import SimpleNamespace

import pytest

from app.records import best_efforts, persist_efforts, record_book


def run(points, id=1, sport="running"):
    activity = SimpleNamespace(
        id=id,
        sport=sport,
        started_at=datetime(2026, 1, 1, tzinfo=UTC) + timedelta(days=id),
        samples=[{"distance": d, "time": t} for d, t in points],
    )
    persist_efforts(activity)
    return activity


def test_fastest_window_can_start_between_samples():
    efforts = best_efforts(run([(0, 0), (600, 300), (1500, 480), (2000, 730)]))
    assert efforts[0]["seconds"] == pytest.approx(230)
    assert efforts[0]["start_m"] == 500
    assert efforts[1]["seconds"] == 730


def test_stops_inside_count_but_boundary_stops_do_not():
    efforts = best_efforts(run([(0, 0), (0, 60), (500, 210), (500, 270), (1000, 420), (1000, 480)]))
    assert efforts[0]["seconds"] == 360


@pytest.mark.parametrize(
    "middle",
    [
        [(None, 150)],
        [(float("nan"), 150)],
        [(400, 200), (100, 210)],
        [(500, 150), (600, 140)],
    ],
)
def test_invalid_or_reset_data_cannot_be_bridged(middle):
    assert best_efforts(run([(0, 0), *middle, (1000, 330)])) == []


def test_missing_time_short_run_and_other_sports_have_no_records():
    assert best_efforts(run([(0, None), (5000, None)])) == []
    assert best_efforts(run([(0, 0), (999.99, 300)])) == []
    assert best_efforts(run([(0, 0), (5000, 300)], sport="cycling")) == []


def test_record_history_backfills_ties_and_improvements():
    first = run([(0, 0), (1000, 300)], id=1)
    faster = run([(0, 0), (1000, 290)], id=2)
    tie = run([(0, 0), (1000, 290)], id=3)
    slower = run([(0, 0), (1000, 320)], id=4)
    book = record_book([slower, tie, faster, first])
    assert book["records"][0]["activity"] is faster
    assert [book["runs"][i][0]["pr"] for i in range(1, 5)] == [True, True, False, False]
    assert record_book([first, slower])["records"][0]["activity"] is first


def test_all_distances_and_timestamp_gaps_use_elapsed_time():
    efforts = best_efforts(run([(0, 100), (42195, 12758.5)]))
    assert len(efforts) == 6
    assert efforts[0]["seconds"] == pytest.approx(300)
    assert efforts[-1]["seconds"] == 12658.5