"""
Calendar Service Tests
"""

import pytest
from unittest.mock import Mock, patch, MagicMock
from datetime import datetime, timedelta

import sys
import os
sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))

from main import app, CalendarToolRequest, CreateEventRequest, ConnectRequest
from storage import CalendarStorage, CalendarAccount, CalendarReminder
from calendar_client import CalDAVClient


class TestCalendarStorage:
    """Test CalendarStorage"""
    
    def test_create_account(self):
        """Test creating calendar account"""
        storage = CalendarStorage()
        
        account = storage.create_account(
            workspace_id="ws1",
            user_id="user1",
            provider="radicale",
            username="testuser",
            password="testpass",
            principal_url="/testuser/",
            default_calendar_id="default"
        )
        
        assert account.id.startswith("acc_")
        assert account.workspace_id == "ws1"
        assert account.user_id == "user1"
        assert account.provider == "radicale"
        assert account.username == "testuser"
    
    def test_get_account(self):
        """Test getting account by ID"""
        storage = CalendarStorage()
        
        account = storage.create_account(
            workspace_id="ws1",
            user_id="user1",
            provider="radicale",
            username="testuser",
            password="testpass"
        )
        
        retrieved = storage.get_account(account.id)
        assert retrieved is not None
        assert retrieved.id == account.id
    
    def test_list_accounts(self):
        """Test listing accounts for user"""
        storage = CalendarStorage()
        
        storage.create_account("ws1", "user1", "radicale", "user1", "pass1")
        storage.create_account("ws1", "user1", "google", "user1@gmail.com", "pass2")
        storage.create_account("ws1", "user2", "radicale", "user2", "pass3")
        
        accounts = storage.list_accounts("ws1", "user1")
        assert len(accounts) == 2
    
    def test_create_reminder(self):
        """Test creating reminder"""
        storage = CalendarStorage()
        
        account = storage.create_account(
            workspace_id="ws1",
            user_id="user1",
            provider="radicale",
            username="testuser",
            password="testpass"
        )
        
        reminder = storage.create_reminder(
            workspace_id="ws1",
            user_id="user1",
            account_id=account.id,
            event_uid="evt123",
            remind_at=(datetime.utcnow() + timedelta(hours=1)).isoformat(),
            channel="inapp"
        )
        
        assert reminder.id.startswith("rem_")
        assert reminder.event_uid == "evt123"
        assert reminder.status == "pending"
    
    def test_idempotency_key(self):
        """Test idempotency key storage"""
        storage = CalendarStorage()
        
        storage.store_idempotency_key(
            key="unique-key-123",
            workspace_id="ws1",
            user_id="user1",
            event_uid="evt123"
        )
        
        result = storage.get_by_idempotency_key("unique-key-123")
        assert result is not None
        assert result["event_uid"] == "evt123"


class TestCalDAVClient:
    """Test CalDAV Client"""
    
    def test_client_init(self):
        """Test client initialization"""
        client = CalDAVClient(
            server_url="https://caldav.example.com",
            username="testuser",
            password="testpass"
        )
        
        assert client.server_url == "https://caldav.example.com"
        assert client.username == "testuser"
        assert client.principal_url is None
    
    def test_discover_principal(self):
        """Test principal discovery"""
        client = CalDAVClient(
            server_url="https://caldav.example.com",
            username="testuser",
            password="testpass"
        )
        
        with patch.object(client, '_request') as mock_request:
            mock_response = Mock()
            mock_response.status_code = 207
            mock_request.return_value = mock_response
            
            principal = client.discover_principal()
            assert principal == "/testuser/"
    
    def test_build_vevent(self):
        """Test VEVENT building"""
        client = CalDAVClient(
            server_url="https://caldav.example.com",
            username="testuser",
            password="testpass"
        )
        
        vevent = client._build_vevent(
            uid="test-uid-123",
            title="Test Event",
            start="2024-01-15T10:00:00",
            end="2024-01-15T11:00:00",
            timezone="Europe/Kiev",
            location="Office",
            description="Test description",
            attendees=["test@example.com"]
        )
        
        assert "BEGIN:VCALENDAR" in vevent
        assert "BEGIN:VEVENT" in vevent
        assert "SUMMARY:Test Event" in vevent
        assert "LOCATION:Office" in vevent
        assert "ATTENDEE:mailto:test@example.com" in vevent
        assert "UID:test-uid-123" in vevent
    
    def test_parse_vevent(self):
        """Test VEVENT parsing"""
        client = CalDAVClient(
            server_url="https://caldav.example.com",
            username="testuser",
            password="testpass"
        )
        
        ics_data = """BEGIN:VCALENDAR
VERSION:2.0
BEGIN:VEVENT
UID:test-uid-456
SUMMARY:Parsed Event
DTSTART:20240115T100000
DTEND:20240115T110000
LOCATION:Home
DESCRIPTION:Test description
END:VEVENT
END:VCALENDAR"""
        
        event = client._parse_vevent(ics_data)
        
        assert event["uid"] == "test-uid-456"
        assert event["title"] == "Parsed Event"
        assert event["location"] == "Home"


class TestCalendarToolEndpoint:
    """Test calendar tool API endpoint"""
    
    @pytest.fixture
    def client(self):
        """Test client fixture"""
        from fastapi.testclient import TestClient
        return TestClient(app)
    
    def test_health_check(self, client):
        """Test health endpoint"""
        response = client.get("/health")
        assert response.status_code == 200
        assert response.json()["status"] == "healthy"
    
    def test_metrics(self, client):
        """Test metrics endpoint"""
        response = client.get("/metrics")
        assert response.status_code == 200
        data = response.json()
        assert "accounts_count" in data
        assert "reminders_pending" in data
    
    @patch('main.CalDAVClient')
    def test_connect_radicale(self, mock_caldav_class, client):
        """Test connecting Radicale account"""
        mock_client = Mock()
        mock_client.list_calendars.return_value = [
            {"id": "default", "display_name": "Default Calendar"}
        ]
        mock_client.principal_url = "/testuser/"
        mock_caldav_class.return_value = mock_client
        
        response = client.post(
            "/v1/calendar/connect/radicale",
            json={
                "workspace_id": "ws1",
                "user_id": "user1",
                "username": "testuser",
                "password": "testpass"
            }
        )
        
        assert response.status_code == 200
        data = response.json()
        assert data["status"] == "connected"
        assert "account_id" in data


if __name__ == "__main__":
    pytest.main([__file__, "-v"])