"""
Tests for notification service, models, and API endpoints.
"""
import pytest
from datetime import datetime, timedelta
from decimal import Decimal
from unittest.mock import AsyncMock, patch

from app.models.signal import Signal, SignalType, SignalStatus
from app.models.notification import (
    NotificationSetting, NotificationHistory,
    ChannelType, NotificationStatus,
)
from app.services.notification import (
    format_signal_message,
    _is_duplicate,
    send_notification,
)


# --- format_signal_message tests ---

class TestFormatSignalMessage:
    def test_buy_signal_full(self):
        signal = Signal(
            ticker="005930",
            name="삼성전자",
            signal_type=SignalType.BUY,
            entry_price=Decimal("72000"),
            target_price=Decimal("75600"),
            stop_loss_price=Decimal("69840"),
            reason="breakout, large_candle",
        )
        msg = format_signal_message(signal)
        assert "삼성전자" in msg
        assert "005930" in msg
        assert "매수" in msg
        assert "72,000" in msg
        assert "75,600" in msg
        assert "69,840" in msg
        assert "breakout" in msg

    def test_sell_signal_minimal(self):
        signal = Signal(
            ticker="035420",
            name=None,
            signal_type=SignalType.SELL,
            entry_price=None,
            target_price=None,
            stop_loss_price=None,
            reason=None,
        )
        msg = format_signal_message(signal)
        assert "035420" in msg
        assert "매도" in msg
        assert "진입가" not in msg
        assert "목표가" not in msg

    def test_partial_sell_signal(self):
        signal = Signal(
            ticker="000660",
            name="SK하이닉스",
            signal_type=SignalType.PARTIAL_SELL,
            entry_price=Decimal("150000"),
        )
        msg = format_signal_message(signal)
        assert "부분매도" in msg
        assert "150,000" in msg


# --- _is_duplicate tests ---

class TestIsDuplicate:
    def test_no_duplicate_when_empty(self, db):
        assert _is_duplicate(db, signal_id=999, channel_type=ChannelType.DISCORD) is False

    def test_duplicate_within_24h(self, db):
        history = NotificationHistory(
            signal_id=1,
            channel_type=ChannelType.DISCORD,
            status=NotificationStatus.SENT,
            sent_at=datetime.utcnow() - timedelta(hours=1),
            message="test",
        )
        db.add(history)
        db.commit()

        assert _is_duplicate(db, signal_id=1, channel_type=ChannelType.DISCORD) is True

    def test_no_duplicate_after_24h(self, db):
        history = NotificationHistory(
            signal_id=1,
            channel_type=ChannelType.DISCORD,
            status=NotificationStatus.SENT,
            sent_at=datetime.utcnow() - timedelta(hours=25),
            message="test",
        )
        db.add(history)
        db.commit()

        assert _is_duplicate(db, signal_id=1, channel_type=ChannelType.DISCORD) is False

    def test_failed_notification_not_duplicate(self, db):
        history = NotificationHistory(
            signal_id=1,
            channel_type=ChannelType.DISCORD,
            status=NotificationStatus.FAILED,
            sent_at=datetime.utcnow(),
            message="test",
        )
        db.add(history)
        db.commit()

        assert _is_duplicate(db, signal_id=1, channel_type=ChannelType.DISCORD) is False

    def test_different_channel_not_duplicate(self, db):
        history = NotificationHistory(
            signal_id=1,
            channel_type=ChannelType.DISCORD,
            status=NotificationStatus.SENT,
            sent_at=datetime.utcnow(),
            message="test",
        )
        db.add(history)
        db.commit()

        assert _is_duplicate(db, signal_id=1, channel_type=ChannelType.TELEGRAM) is False


# --- send_notification tests ---

class TestSendNotification:
    @pytest.mark.asyncio
    async def test_sends_to_enabled_channels(self, db, test_user):
        setting = NotificationSetting(
            user_id=test_user.id,
            channel_type=ChannelType.DISCORD,
            webhook_url="https://discord.com/api/webhooks/test",
            enabled=True,
        )
        db.add(setting)

        signal = Signal(
            id=1,
            date=datetime.utcnow().date(),
            ticker="005930",
            name="삼성전자",
            signal_type=SignalType.BUY,
            entry_price=Decimal("72000"),
            status=SignalStatus.ACTIVE,
        )
        db.add(signal)
        db.commit()

        with patch("app.services.notification.send_discord", new_callable=AsyncMock) as mock_discord:
            await send_notification(signal, db)
            mock_discord.assert_called_once()

        history = db.query(NotificationHistory).first()
        assert history is not None
        assert history.status == NotificationStatus.SENT
        assert history.signal_id == 1

    @pytest.mark.asyncio
    async def test_skips_disabled_channels(self, db, test_user):
        setting = NotificationSetting(
            user_id=test_user.id,
            channel_type=ChannelType.DISCORD,
            webhook_url="https://discord.com/api/webhooks/test",
            enabled=False,
        )
        db.add(setting)

        signal = Signal(
            id=2,
            date=datetime.utcnow().date(),
            ticker="005930",
            name="삼성전자",
            signal_type=SignalType.BUY,
            status=SignalStatus.ACTIVE,
        )
        db.add(signal)
        db.commit()

        with patch("app.services.notification.send_discord", new_callable=AsyncMock) as mock_discord:
            await send_notification(signal, db)
            mock_discord.assert_not_called()

    @pytest.mark.asyncio
    async def test_skips_duplicate(self, db, test_user):
        setting = NotificationSetting(
            user_id=test_user.id,
            channel_type=ChannelType.DISCORD,
            webhook_url="https://discord.com/api/webhooks/test",
            enabled=True,
        )
        db.add(setting)

        signal = Signal(
            id=3,
            date=datetime.utcnow().date(),
            ticker="005930",
            name="삼성전자",
            signal_type=SignalType.BUY,
            status=SignalStatus.ACTIVE,
        )
        db.add(signal)

        # Pre-existing sent notification
        history = NotificationHistory(
            signal_id=3,
            channel_type=ChannelType.DISCORD,
            status=NotificationStatus.SENT,
            sent_at=datetime.utcnow(),
            message="already sent",
        )
        db.add(history)
        db.commit()

        with patch("app.services.notification.send_discord", new_callable=AsyncMock) as mock_discord:
            await send_notification(signal, db)
            mock_discord.assert_not_called()

    @pytest.mark.asyncio
    async def test_records_failure(self, db, test_user):
        setting = NotificationSetting(
            user_id=test_user.id,
            channel_type=ChannelType.DISCORD,
            webhook_url="https://discord.com/api/webhooks/test",
            enabled=True,
        )
        db.add(setting)

        signal = Signal(
            id=4,
            date=datetime.utcnow().date(),
            ticker="005930",
            name="삼성전자",
            signal_type=SignalType.BUY,
            status=SignalStatus.ACTIVE,
        )
        db.add(signal)
        db.commit()

        with patch(
            "app.services.notification.send_discord",
            new_callable=AsyncMock,
            side_effect=Exception("Connection failed"),
        ):
            await send_notification(signal, db)

        history = db.query(NotificationHistory).first()
        assert history.status == NotificationStatus.FAILED
        assert "Connection failed" in history.error_message


# --- API endpoint tests ---

class TestNotificationAPI:
    def test_get_settings_empty(self, client, auth_headers):
        response = client.get("/api/notifications/settings", headers=auth_headers)
        assert response.status_code == 200
        assert response.json() == []

    def test_create_setting(self, client, auth_headers):
        response = client.post(
            "/api/notifications/settings",
            headers=auth_headers,
            json={
                "channel_type": "discord",
                "webhook_url": "https://discord.com/api/webhooks/test/token",
                "enabled": True,
            },
        )
        assert response.status_code == 201
        data = response.json()
        assert data["channel_type"] == "discord"
        assert data["webhook_url"] == "https://discord.com/api/webhooks/test/token"
        assert data["enabled"] is True

    def test_create_duplicate_channel_fails(self, client, auth_headers):
        payload = {
            "channel_type": "discord",
            "webhook_url": "https://discord.com/api/webhooks/test/token",
        }
        client.post("/api/notifications/settings", headers=auth_headers, json=payload)
        response = client.post("/api/notifications/settings", headers=auth_headers, json=payload)
        assert response.status_code == 400

    def test_update_setting(self, client, auth_headers):
        create_resp = client.post(
            "/api/notifications/settings",
            headers=auth_headers,
            json={
                "channel_type": "discord",
                "webhook_url": "https://discord.com/api/webhooks/old",
            },
        )
        setting_id = create_resp.json()["id"]

        update_resp = client.put(
            f"/api/notifications/settings/{setting_id}",
            headers=auth_headers,
            json={"webhook_url": "https://discord.com/api/webhooks/new", "enabled": False},
        )
        assert update_resp.status_code == 200
        data = update_resp.json()
        assert data["webhook_url"] == "https://discord.com/api/webhooks/new"
        assert data["enabled"] is False

    def test_update_nonexistent_setting(self, client, auth_headers):
        response = client.put(
            "/api/notifications/settings/9999",
            headers=auth_headers,
            json={"enabled": False},
        )
        assert response.status_code == 404

    def test_get_history(self, client, auth_headers):
        response = client.get("/api/notifications/history", headers=auth_headers)
        assert response.status_code == 200
        assert isinstance(response.json(), list)

    def test_unauthenticated_access(self, client):
        response = client.get("/api/notifications/settings")
        assert response.status_code == 401