"""Tests for the cron scheduler module."""

import asyncio
from datetime import datetime, timedelta
from unittest.mock import AsyncMock, MagicMock, patch
import zoneinfo

import pytest

from cron.scheduler import CronScheduler


@pytest.fixture
def scheduler():
    send_text = AsyncMock()
    matrix_client = MagicMock()
    sched = CronScheduler(
        portal_url="https://matrixhost.eu",
        api_key="test-key",
        matrix_client=matrix_client,
        send_text_fn=send_text,
    )
    return sched


class TestSecondsUntilNextRun:
    def test_daily_schedule_future_today(self, scheduler):
        tz = zoneinfo.ZoneInfo("Europe/Berlin")
        now = datetime.now(tz)
        # Set scheduleAt to 2 hours from now
        future_time = now + timedelta(hours=2)
        job = {
            "schedule": "daily",
            "scheduleAt": f"{future_time.hour:02d}:{future_time.minute:02d}",
            "timezone": "Europe/Berlin",
        }
        secs = scheduler._seconds_until_next_run(job)
        assert 7000 < secs < 7300  # roughly 2 hours

    def test_daily_schedule_past_today_goes_tomorrow(self, scheduler):
        tz = zoneinfo.ZoneInfo("Europe/Berlin")
        now = datetime.now(tz)
        # Set scheduleAt to 2 hours ago
        past_time = now - timedelta(hours=2)
        job = {
            "schedule": "daily",
            "scheduleAt": f"{past_time.hour:02d}:{past_time.minute:02d}",
            "timezone": "Europe/Berlin",
        }
        secs = scheduler._seconds_until_next_run(job)
        # Should be ~22 hours from now
        assert 78000 < secs < 80000

    def test_hourly_schedule(self, scheduler):
        job = {
            "schedule": "hourly",
            "scheduleAt": None,
            "timezone": "Europe/Berlin",
        }
        secs = scheduler._seconds_until_next_run(job)
        # Should be between 0 and 3600
        assert 0 <= secs <= 3600

    def test_weekdays_skips_weekend(self, scheduler):
        # Mock a Saturday
        job = {
            "schedule": "weekdays",
            "scheduleAt": "09:00",
            "timezone": "UTC",
        }
        secs = scheduler._seconds_until_next_run(job)
        assert secs > 0

    def test_weekly_schedule(self, scheduler):
        job = {
            "schedule": "weekly",
            "scheduleAt": "09:00",
            "timezone": "Europe/Berlin",
        }
        secs = scheduler._seconds_until_next_run(job)
        # Should be between 0 and 7 days
        assert 0 < secs <= 7 * 86400

    def test_default_timezone(self, scheduler):
        job = {
            "schedule": "daily",
            "scheduleAt": "23:59",
            "timezone": "Europe/Berlin",
        }
        secs = scheduler._seconds_until_next_run(job)
        assert secs > 0

    def test_different_timezone(self, scheduler):
        job = {
            "schedule": "daily",
            "scheduleAt": "09:00",
            "timezone": "America/New_York",
        }
        secs = scheduler._seconds_until_next_run(job)
        assert secs > 0


class TestSyncJobs:
    @pytest.mark.asyncio
    async def test_sync_adds_new_jobs(self, scheduler):
        """New jobs from the API should be registered as tasks."""
        jobs_response = {
            "jobs": [
                {
                    "id": "j1",
                    "name": "Test Job",
                    "jobType": "brave_search",
                    "schedule": "daily",
                    "scheduleAt": "09:00",
                    "timezone": "Europe/Berlin",
                    "config": {"query": "test"},
                    "targetRoom": "!room:test",
                    "enabled": True,
                    "updatedAt": "2026-03-16T00:00:00Z",
                }
            ]
        }

        with patch("httpx.AsyncClient") as mock_client_cls:
            mock_client = AsyncMock()
            mock_client_cls.return_value.__aenter__ = AsyncMock(return_value=mock_client)
            mock_client_cls.return_value.__aexit__ = AsyncMock(return_value=False)
            mock_resp = MagicMock()
            mock_resp.json.return_value = jobs_response
            mock_resp.raise_for_status = MagicMock()
            mock_client.get = AsyncMock(return_value=mock_resp)

            await scheduler._sync_jobs()

        assert "j1" in scheduler._jobs
        assert "j1" in scheduler._tasks
        # Clean up the task
        scheduler._tasks["j1"].cancel()
        try:
            await scheduler._tasks["j1"]
        except asyncio.CancelledError:
            pass

    @pytest.mark.asyncio
    async def test_sync_removes_deleted_jobs(self, scheduler):
        """Jobs removed from the API should have their tasks cancelled."""
        # Pre-populate with a job
        mock_task = AsyncMock()
        mock_task.cancel = MagicMock()
        scheduler._jobs["old_job"] = {"id": "old_job"}
        scheduler._tasks["old_job"] = mock_task

        with patch("httpx.AsyncClient") as mock_client_cls:
            mock_client = AsyncMock()
            mock_client_cls.return_value.__aenter__ = AsyncMock(return_value=mock_client)
            mock_client_cls.return_value.__aexit__ = AsyncMock(return_value=False)
            mock_resp = MagicMock()
            mock_resp.json.return_value = {"jobs": []}  # No jobs
            mock_resp.raise_for_status = MagicMock()
            mock_client.get = AsyncMock(return_value=mock_resp)

            await scheduler._sync_jobs()

        assert "old_job" not in scheduler._tasks
        assert "old_job" not in scheduler._jobs
        mock_task.cancel.assert_called_once()


class TestRunOnce:
    @pytest.mark.asyncio
    async def test_run_once_reports_success(self, scheduler):
        """Successful execution should report back to portal."""
        job = {
            "id": "j1",
            "name": "Test",
            "jobType": "reminder",
            "config": {"message": "Hello"},
            "targetRoom": "!room:test",
        }

        with patch("httpx.AsyncClient") as mock_client_cls:
            mock_client = AsyncMock()
            mock_client_cls.return_value.__aenter__ = AsyncMock(return_value=mock_client)
            mock_client_cls.return_value.__aexit__ = AsyncMock(return_value=False)
            mock_client.post = AsyncMock()

            await scheduler._run_once(job)

        # send_text should have been called with the reminder
        scheduler.send_text.assert_called_once()
        call_args = scheduler.send_text.call_args
        assert call_args[0][0] == "!room:test"
        assert "Hello" in call_args[0][1]

    @pytest.mark.asyncio
    async def test_run_once_reports_error(self, scheduler):
        """Failed execution should report error back to portal."""
        job = {
            "id": "j1",
            "name": "Test",
            "jobType": "brave_search",
            "config": {},  # Missing query = error
            "targetRoom": "!room:test",
            "dedupKeys": [],
        }

        with patch("httpx.AsyncClient") as mock_client_cls:
            mock_client = AsyncMock()
            mock_client_cls.return_value.__aenter__ = AsyncMock(return_value=mock_client)
            mock_client_cls.return_value.__aexit__ = AsyncMock(return_value=False)
            mock_client.post = AsyncMock()

            await scheduler._run_once(job)

        # Should not have sent a message to the room (error in executor)
        # But should have reported back
        # The report happens via httpx post