"""
Unit tests for authentication, registration, token refresh, and profile endpoints.
"""
from __future__ import annotations

import pytest
from httpx import AsyncClient
from sqlalchemy.ext.asyncio import AsyncSession


@pytest.mark.asyncio
async def test_health_check(client: AsyncClient):
    """Test health check status returns healthy."""
    response = await client.get("/health")
    assert response.status_code == 200
    data = response.json()
    assert data["status"] == "healthy"
    assert "deploy_mode" in data
    assert "llm_provider" in data


@pytest.mark.asyncio
async def test_root_endpoint(client: AsyncClient):
    """Test API root description."""
    response = await client.get("/")
    assert response.status_code == 200
    data = response.json()
    assert "Enterprise AI Copilot Platform" in data["name"]


@pytest.mark.asyncio
async def test_register_and_login_flow(client: AsyncClient, db_session: AsyncSession):
    """Test full registration and login workflow."""
    # 1. Register a new user + tenant
    register_data = {
        "email": "test@company.com",
        "password": "SecretPassword123!",
        "full_name": "Test User",
        "tenant_name": "Test Organization"
    }
    
    response = await client.post("/api/v1/auth/register", json=register_data)
    assert response.status_code == 201, response.text
    reg_data = response.json()
    
    assert "user" in reg_data
    assert "tokens" in reg_data
    assert reg_data["user"]["email"] == "test@company.com"
    assert reg_data["user"]["role"] == "admin" # First user is Admin
    assert "access_token" in reg_data["tokens"]
    
    access_token = reg_data["tokens"]["access_token"]
    refresh_token = reg_data["tokens"]["refresh_token"]

    # 2. Login with email and password
    login_form = {
        "username": "test@company.com",
        "password": "SecretPassword123!"
    }
    
    response = await client.post("/api/v1/auth/login", data=login_form)
    assert response.status_code == 200, response.text
    login_data = response.json()
    assert "access_token" in login_data
    assert "refresh_token" in login_data

    # 3. Get profile with access token
    headers = {"Authorization": f"Bearer {access_token}"}
    response = await client.get("/api/v1/auth/me", headers=headers)
    assert response.status_code == 200, response.text
    me_data = response.json()
    assert me_data["email"] == "test@company.com"
    assert me_data["role"] == "admin"

    # 4. Refresh access token
    refresh_data = {
        "refresh_token": refresh_token
    }
    response = await client.post("/api/v1/auth/refresh", json=refresh_data)
    assert response.status_code == 200, response.text
    refreshed_data = response.json()
    assert "access_token" in refreshed_data
    assert "refresh_token" in refreshed_data

    # 5. Logout
    response = await client.post("/api/v1/auth/logout", headers=headers)
    assert response.status_code == 200
    assert "Logged out successfully" in response.json()["message"]


@pytest.mark.asyncio
async def test_register_duplicate_email(client: AsyncClient):
    """Test that duplicate registrations fail with 409 conflict."""
    register_data = {
        "email": "duplicate@company.com",
        "password": "SecretPassword123!",
        "full_name": "Test User",
        "tenant_name": "Test Organization"
    }
    
    # First registration
    response = await client.post("/api/v1/auth/register", json=register_data)
    assert response.status_code == 201

    # Second registration with same email
    response = await client.post("/api/v1/auth/register", json=register_data)
    assert response.status_code == 409
    data = response.json()
    assert data["detail"]["error"] == "email_exists"


@pytest.mark.asyncio
async def test_login_invalid_credentials(client: AsyncClient):
    """Test login fails with incorrect password."""
    login_form = {
        "username": "wrong@company.com",
        "password": "IncorrectPassword"
      }
    response = await client.post("/api/v1/auth/login", data=login_form)
    assert response.status_code == 401
    assert response.json()["detail"]["error"] == "invalid_credentials"