from datetime import UTC, datetime, timedelta

import pytest

from pigway_frame_flow.errors import FlowError
from pigway_frame_flow.models import JobInput, PlaylistInput, Schedule
from pigway_frame_flow.scheduler.engine import next_run


@pytest.mark.parametrize("kind,day", [("daily", 4), ("weekdays", 4), ("weekends", 6)])
def test_schedules(kind, day):
    start = datetime(2026, 10, 1, 0, 0, tzinfo=UTC)
    result = datetime.fromisoformat(next_run(Schedule(type=kind, time="09:00"), start))
    assert result.weekday() + 1 == day


def test_cron():
    result = next_run(
        Schedule(type="cron", cron="0 7 * * *"), datetime(2026, 10, 1, 0, 0, tzinfo=UTC)
    )
    assert result.startswith("2026-10-01T23:00")


@pytest.mark.parametrize("type", ["date", "temporary"])
def test_one_time(type):
    current = datetime.now(UTC)
    at = current + timedelta(hours=1)
    assert next_run(Schedule(type=type, at=at), current) == at.isoformat()
    assert next_run(Schedule(type=type, at=at), at) is None


def test_dedupe(app, service):
    scheduler = app.state.scheduler
    job = scheduler.save_job(
        JobInput(
            name="Morning",
            schedule={"type": "daily", "time": "07:00"},
            source={"type": "template", "template": "quote"},
        )
    )
    due = (datetime.now(UTC) - timedelta(seconds=2)).isoformat()
    service.db.execute("UPDATE jobs SET next_run=? WHERE id=?", (due, job["id"]))
    scheduler.tick()
    scheduler.tick()
    assert len(service.db.all("SELECT * FROM operations")) == 1
    assert len(service.db.all("SELECT * FROM job_runs")) == 1


def test_overdue_skipped(app, service):
    scheduler = app.state.scheduler
    job = scheduler.save_job(
        JobInput(
            name="Old",
            schedule={"type": "daily", "time": "07:00"},
            source={"type": "restore"},
        )
    )
    service.db.execute(
        "UPDATE jobs SET next_run=? WHERE id=?",
        ((datetime.now(UTC) - timedelta(hours=1)).isoformat(), job["id"]),
    )
    scheduler.tick()
    assert scheduler.jobs()[0]["last_result"] == "SKIPPED_OVERDUE"
    assert not service.db.all("SELECT * FROM operations")


def test_playlist(app, service):
    scheduler = app.state.scheduler
    scheduler.save_playlist(PlaylistInput(name="Art", image_ids=[1], enabled=True))
    scheduler.tick()
    scheduler.tick()
    assert len(service.db.all("SELECT * FROM operations")) == 1


def test_invalid_cron():
    with pytest.raises(FlowError):
        next_run(Schedule(type="cron", cron="* * * * * *"))