import json
from datetime import datetime, timezone

import pytest

from src import gitea_proxy
from src.push_notifications import PushConfiguration, dispatch_deadline_reminders
from src.push_subscription_store import PushSubscriptionStore


@pytest.mark.anyio
async def test_deadline_reminder_sends_one_private_local_day_digest_and_deduplicates(tmp_path):
    store = PushSubscriptionStore(tmp_path / "push.sqlite3")
    store.upsert("device-a", {
        "endpoint": "https://push.example/device-a",
        "keys": {"p256dh": "public-key", "auth": "auth-secret"},
    })
    store.set_deadline_preferences(
        "device-a", enabled=True, timezone="America/New_York", reminder_hour=9
    )
    sent = []

    async def assigned():
        return {
            "complete": True,
            "items": [
                {
                    "id": 42,
                    "title": "Private launch plan",
                    "repository": {"full_name": "private/repo"},
                    "due_date": "2026-08-14T12:00:00Z",
                },
                {"id": 43, "due_date": "2026-08-20T12:00:00Z"},
            ],
        }

    async def send(_subscription, payload):
        sent.append(json.loads(payload))

    config = PushConfiguration("public", "private", "mailto:ops@example.com")
    now = datetime(2026, 8, 13, 13, 5, tzinfo=timezone.utc)

    assert await dispatch_deadline_reminders(store, config, assigned, send, now=now) == 1
    assert await dispatch_deadline_reminders(store, config, assigned, send, now=now) == 0
    assert sent == [{
        "title": "1 deadline needs attention",
        "body": "Open Agenda to review or replan it.",
        "route": "#/my-work/agenda",
        "tag": "stackchain-deadline-digest-2026-08-13",
        "deadline_count": 1,
    }]
    assert "Private launch plan" not in json.dumps(sent)
    assert "private/repo" not in json.dumps(sent)


@pytest.mark.anyio
async def test_deadline_reminder_fails_closed_for_incomplete_snapshot_and_before_local_hour(tmp_path):
    store = PushSubscriptionStore(tmp_path / "push.sqlite3")
    store.upsert("device-a", {
        "endpoint": "https://push.example/device-a",
        "keys": {"p256dh": "public-key", "auth": "auth-secret"},
    })
    store.set_deadline_preferences(
        "device-a", enabled=True, timezone="America/Los_Angeles", reminder_hour=9
    )
    sent = []

    async def incomplete():
        return {"complete": False, "items": [{"id": 42, "due_date": "2026-08-14T12:00:00Z"}]}

    async def complete():
        return {"complete": True, "items": [{"id": 42, "due_date": "2026-08-14T12:00:00Z"}]}

    async def send(_subscription, payload):
        sent.append(payload)

    config = PushConfiguration("public", "private", "mailto:ops@example.com")
    assert await dispatch_deadline_reminders(
        store, config, incomplete, send,
        now=datetime(2026, 8, 13, 18, 0, tzinfo=timezone.utc),
    ) == 0
    assert await dispatch_deadline_reminders(
        store, config, complete, send,
        now=datetime(2026, 8, 13, 15, 0, tzinfo=timezone.utc),
    ) == 0
    assert sent == []


def test_deadline_preferences_persist_on_the_existing_device_subscription(tmp_path):
    store = PushSubscriptionStore(tmp_path / "push.sqlite3")
    store.upsert("device-a", {
        "endpoint": "https://push.example/device-a",
        "keys": {"p256dh": "public-key", "auth": "auth-secret"},
    })

    store.set_deadline_preferences(
        "device-a", enabled=True, timezone="Europe/London", reminder_hour=8
    )

    assert store.deadline_preferences("device-a") == {
        "enabled": True,
        "timezone": "Europe/London",
        "reminder_hour": 8,
    }


@pytest.mark.anyio
async def test_assigned_deadline_snapshot_is_pagination_complete(monkeypatch):
    pages = {
        1: {"items": [{"id": 1}], "has_more": True},
        2: {"items": [{"id": 2}], "has_more": False},
    }

    async def work_page(stream, page, limit):
        assert stream == "issue"
        assert limit == 50
        return pages[page]

    monkeypatch.setattr(gitea_proxy, "work_page", work_page)

    assert await gitea_proxy.assigned_issue_snapshot() == {
        "items": [{"id": 1}, {"id": 2}],
        "complete": True,
    }


@pytest.mark.anyio
async def test_competing_workers_send_one_deadline_digest(tmp_path):
    path = tmp_path / "push.sqlite3"
    first = PushSubscriptionStore(path)
    second = PushSubscriptionStore(path)
    first.upsert("device-a", {
        "endpoint": "https://push.example/device-a",
        "keys": {"p256dh": "public-key", "auth": "auth-secret"},
    })
    first.set_deadline_preferences(
        "device-a", enabled=True, timezone="UTC", reminder_hour=9
    )
    sending = __import__("asyncio").Event()
    release = __import__("asyncio").Event()
    sent = []

    async def assigned():
        return {"complete": True, "items": [{"id": 1, "due_date": "2026-08-14T00:00:00Z"}]}

    async def send(_subscription, payload):
        sent.append(payload)
        sending.set()
        await release.wait()

    config = PushConfiguration("public", "private", "mailto:ops@example.com")
    now = datetime(2026, 8, 13, 10, 0, tzinfo=timezone.utc)
    active = __import__("asyncio").create_task(
        dispatch_deadline_reminders(first, config, assigned, send, now=now)
    )
    await sending.wait()
    competing = await dispatch_deadline_reminders(second, config, assigned, send, now=now)
    release.set()

    assert competing == 0
    assert await active == 1
    assert len(sent) == 1