"""Pytest fixtures and configuration."""

import os
from pathlib import Path

# Load test environment variables BEFORE importing app
test_env_path = Path(__file__).parent.parent / ".env.test"
if test_env_path.exists():
    from dotenv import load_dotenv
    load_dotenv(test_env_path)

import pytest
from unittest.mock import AsyncMock, MagicMock
from fastapi.testclient import TestClient
from datetime import datetime, timedelta, UTC

from app.main import app
from app.dependencies import get_db_client, get_current_user
from app.interfaces.db_api_client import DBApiClient
from app.models.auth import UserResponse
from app.models.settings import UserSettings, EnvironmentSettings
from app.utils.security import create_access_token


# ============================================
# Mock DB Client
# ============================================

@pytest.fixture
def mock_db_client():
    """Mock DB API client."""
    client = AsyncMock(spec=DBApiClient)
    return client


# ============================================
# Test User
# ============================================

@pytest.fixture
def test_user():
    """Test user data."""
    return {
        "user_id": "test-user-123",
        "login": "12345678"
    }


@pytest.fixture
def test_user_response(test_user):
    """Test user response from DB API."""
    return UserResponse(
        user_id=test_user["user_id"],
        login=test_user["login"],
        last_login_at=datetime.now(UTC).isoformat().replace('+00:00', 'Z'),
        created_at=datetime.now(UTC).isoformat().replace('+00:00', 'Z')
    )


# ============================================
# JWT Token
# ============================================

@pytest.fixture
def test_token(test_user):
    """Generate test JWT token."""
    return create_access_token(test_user)


@pytest.fixture
def expired_token(test_user):
    """Generate expired JWT token."""
    return create_access_token(
        test_user,
        expires_delta=timedelta(seconds=-10)  # Expired 10 seconds ago
    )


# ============================================
# Test Settings
# ============================================

@pytest.fixture
def test_settings():
    """Test user settings."""
    env_settings = EnvironmentSettings(
        apiMode="bench",
        bearerToken="test-bearer-token",
        systemPlatform="test-platform",
        systemPlatformUser="test-user",
        platformUserId="platform-user-123",
        platformId="platform-123",
        withClassify=False,
        resetSessionMode=True
    )

    return UserSettings(
        user_id="test-user-123",
        settings={
            "ift": env_settings,
            "psi": env_settings.model_copy(),
            "prod": env_settings.model_copy()
        },
        updated_at=datetime.now(UTC).isoformat().replace('+00:00', 'Z')
    )


# ============================================
# FastAPI Test Client
# ============================================

@pytest.fixture
def client(mock_db_client, test_user):
    """FastAPI test client with mocked dependencies."""

    # Override get_current_user to return test user
    async def mock_get_current_user():
        return test_user

    # Override get_db_client to return mock
    def mock_get_db_client():
        return mock_db_client

    app.dependency_overrides[get_current_user] = mock_get_current_user
    app.dependency_overrides[get_db_client] = mock_get_db_client

    with TestClient(app) as test_client:
        yield test_client

    # Clear overrides after test
    app.dependency_overrides.clear()


@pytest.fixture
def unauthenticated_client():
    """FastAPI test client without authentication."""
    with TestClient(app) as test_client:
        yield test_client


# ============================================
# Mock RAG Responses
# ============================================

@pytest.fixture
def mock_bench_response():
    """Mock RAG backend bench response (matches format.py structure)."""
    return {
        "answers": [
            {
                "body_research": "Test research answer 1",
                "body_analytical_hub": "Test analytical hub answer 1",
                "docs_from_vectorstore": {
                    "research": [],
                    "analytical_hub": []
                },
                "docs_to_llm": {
                    "research": [],
                    "analytical_hub": []
                },
                "processing_time_sec": 1.5,
                "question": "Test question 1"
            },
            {
                "body_research": "Test research answer 2",
                "body_analytical_hub": "Test analytical hub answer 2",
                "docs_from_vectorstore": {
                    "research": [],
                    "analytical_hub": []
                },
                "docs_to_llm": {
                    "research": [],
                    "analytical_hub": []
                },
                "processing_time_sec": 2.3,
                "question": "Test question 2"
            }
        ]
    }


@pytest.fixture
def mock_backend_response():
    """Mock RAG backend single response."""
    return {
        "answer": "Test answer",
        "confidence": 0.92,
        "docs": []
    }


# ============================================
# Mock httpx Client
# ============================================

@pytest.fixture
def mock_httpx_client():
    """Mock httpx.AsyncClient."""
    client = AsyncMock()

    # Mock response
    mock_response = MagicMock()
    mock_response.status_code = 200
    mock_response.json.return_value = {"test": "response"}
    mock_response.raise_for_status = MagicMock()

    client.post.return_value = mock_response
    client.get.return_value = mock_response
    client.aclose = AsyncMock()

    return client