"""The timer's state machine."""

from __future__ import annotations

import pytest
from app.models import PomodoroSession
from app.services import pomodoro, settings_service


def test_start_sets_duration_from_settings(session, settings):
    row = pomodoro.start(session, settings, kind="work")
    assert row.planned_seconds == settings.pomodoro.work_minutes * 60
    assert row.status == "running"
    assert pomodoro.remaining_seconds(row) <= row.planned_seconds


def test_minutes_override_wins(session, settings):
    row = pomodoro.start(session, settings, kind="work", minutes=3)
    assert row.planned_seconds == 180


def test_starting_again_abandons_the_previous_interval(session, settings):
    first = pomodoro.start(session, settings, kind="work")
    pomodoro.start(session, settings, kind="work")
    session.refresh(first)
    assert first.status == "abandoned"
    assert len(session.query(PomodoroSession).all()) == 2


def test_pause_counts_an_interruption_and_freezes_the_clock(session, settings):
    pomodoro.start(session, settings, kind="work")
    row = pomodoro.pause(session, settings)
    assert row.status == "paused"
    assert row.interruptions == 1
    frozen = pomodoro.elapsed_seconds(row)
    assert pomodoro.elapsed_seconds(row) == frozen


def test_pause_can_be_switched_off(session, settings):
    settings.pomodoro.allow_pause = False
    settings_service.save_settings(session, settings)
    pomodoro.start(session, settings, kind="work")
    with pytest.raises(pomodoro.TimerError):
        pomodoro.pause(session, settings)


def test_long_break_arrives_on_the_configured_cycle(session, settings):
    settings.pomodoro.cycles_before_long_break = 2
    settings.pomodoro.auto_start_breaks = False
    settings_service.save_settings(session, settings)

    pomodoro.start(session, settings, kind="work")
    pomodoro.complete(session, settings, auto_next=False)
    assert pomodoro.next_kind(session, settings) == "short_break"

    pomodoro.start(session, settings, kind="short_break")
    pomodoro.complete(session, settings, auto_next=False)
    pomodoro.start(session, settings, kind="work")
    pomodoro.complete(session, settings, auto_next=False)
    assert pomodoro.next_kind(session, settings) == "long_break"


def test_auto_start_breaks_rolls_straight_on(session, settings):
    settings.pomodoro.auto_start_breaks = True
    settings_service.save_settings(session, settings)
    pomodoro.start(session, settings, kind="work")
    finished, follow_on = pomodoro.complete(session, settings)
    assert finished.status == "completed"
    assert follow_on is not None and follow_on.kind == "short_break"


def test_strict_mode_demands_a_reason(session, settings):
    settings.pomodoro.strict_mode = True
    settings_service.save_settings(session, settings)
    pomodoro.start(session, settings, kind="work")
    with pytest.raises(pomodoro.TimerError):
        pomodoro.abandon(session, settings)
    row = pomodoro.abandon(session, settings, reason="fire alarm")
    assert row.status == "abandoned" and row.abandon_reason == "fire alarm"


def test_reap_closes_intervals_left_running(session, settings):
    from datetime import timedelta

    from app.models import utcnow

    row = pomodoro.start(session, settings, kind="work")
    row.started_at = utcnow() - timedelta(hours=9)
    session.commit()
    assert pomodoro.reap_stale(session, settings) == 1
    session.refresh(row)
    assert row.status == "abandoned"


def test_timer_disabled_prevents_start(session, settings):
    settings.pomodoro.timer_enabled = False
    settings_service.save_settings(session, settings)
    with pytest.raises(pomodoro.TimerError, match="view-only"):
        pomodoro.start(session, settings, kind="work")
    st = pomodoro.state(session, settings)
    assert st["timer_enabled"] is False