# tests/persistence/test_sqlite_user.py

from datetime import datetime

import pytest

from myauth.exceptions import UserAlreadyExistsError, UserNotFoundError
from myauth.models.user import UserCreate, UserUpdate
from myauth.persistence.sqlite import SQLiteUserRepository


def test_i_can_create_and_retrieve_user_by_email(user_repository: SQLiteUserRepository,
                                                 test_user_data_create: UserCreate,
                                                 test_user_hashed_password: str):
  """Verifies user creation and successful retrieval by email."""
  
  # 1. Create User
  created_user = user_repository.create_user(
    user_data=test_user_data_create,
    hashed_password=test_user_hashed_password
  )
  
  # Assertions on creation
  assert created_user is not None
  assert created_user.email == test_user_data_create.email
  assert created_user.hashed_password == test_user_hashed_password
  assert created_user.is_active is True
  assert created_user.is_verified is False
  assert created_user.id is not None
  assert isinstance(created_user.created_at, datetime)
  
  # 2. Retrieve User
  retrieved_user = user_repository.get_user_by_email(test_user_data_create.email)
  
  # Assertions on retrieval
  assert retrieved_user is not None
  assert retrieved_user.id == created_user.id
  assert retrieved_user.username == "TestUser"


def test_i_can_retrieve_user_by_id(user_repository: SQLiteUserRepository,
                                   test_user_data_create: UserCreate,
                                   test_user_hashed_password: str):
  """Verifies user retrieval by unique ID."""
  created_user = user_repository.create_user(test_user_data_create, test_user_hashed_password)
  
  retrieved_user = user_repository.get_user_by_id(created_user.id)
  
  assert retrieved_user is not None
  assert retrieved_user.email == created_user.email


def test_i_cannot_create_user_if_email_exists(user_repository: SQLiteUserRepository,
                                              test_user_data_create: UserCreate,
                                              test_user_hashed_password: str):
  """Ensures that creating a user with an existing email raises UserAlreadyExistsError."""
  # First creation should succeed
  user_repository.create_user(test_user_data_create, test_user_hashed_password)
  
  # Second creation with same email should fail
  with pytest.raises(UserAlreadyExistsError):
    user_repository.create_user(test_user_data_create, test_user_hashed_password)


def test_i_can_check_if_email_exists(user_repository: SQLiteUserRepository,
                                     test_user_data_create: UserCreate,
                                     test_user_hashed_password: str):
  """Verifies the email_exists method returns correct boolean results."""
  email = test_user_data_create.email
  non_existent_email = "non.existent@example.com"
  
  # 1. Check before creation (Should be False)
  assert user_repository.email_exists(email) is False
  
  user_repository.create_user(test_user_data_create, test_user_hashed_password)
  
  # 2. Check after creation (Should be True)
  assert user_repository.email_exists(email) is True
  
  # 3. Check for another non-existent email
  assert user_repository.email_exists(non_existent_email) is False


def test_i_can_update_username_and_roles(user_repository: SQLiteUserRepository,
                                         test_user_data_create: UserCreate,
                                         test_user_hashed_password: str):
  """Tests partial update of user fields (username and roles)."""
  
  created_user = user_repository.create_user(test_user_data_create, test_user_hashed_password)
  
  updates = UserUpdate(username="NewUsername", roles=["admin", "staff"])
  
  updated_user = user_repository.update_user(created_user.id, updates)
  
  assert updated_user.username == "NewUsername"
  assert updated_user.roles == ["admin", "staff"]
  # Check that unrelated fields remain the same
  assert updated_user.email == created_user.email
  # Check that update timestamp changed
  assert updated_user.updated_at > created_user.updated_at
  assert updated_user.is_verified == created_user.is_verified


def test_i_can_update_is_active_status(user_repository: SQLiteUserRepository,
                                       test_user_data_create: UserCreate,
                                       test_user_hashed_password: str):
  """Tests the specific update of the 'is_active' status."""
  
  created_user = user_repository.create_user(test_user_data_create, test_user_hashed_password)
  
  # Deactivate
  updates_deactivate = UserUpdate(is_active=False)
  deactivated_user = user_repository.update_user(created_user.id, updates_deactivate)
  assert deactivated_user.is_active is False
  
  # Reactivate
  updates_activate = UserUpdate(is_active=True)
  reactivated_user = user_repository.update_user(created_user.id, updates_activate)
  assert reactivated_user.is_active is True


def test_i_cannot_update_non_existent_user(user_repository: SQLiteUserRepository):
  """Ensures that updating a user with an unknown ID raises UserNotFoundError."""
  non_existent_id = "unknown_id_123"
  updates = UserUpdate(username="Phantom")
  
  with pytest.raises(UserNotFoundError):
    user_repository.update_user(non_existent_id, updates)


def test_i_can_delete_user(user_repository: SQLiteUserRepository,
                           test_user_data_create: UserCreate,
                           test_user_hashed_password: str):
  """Verifies user deletion and subsequent failure to retrieve."""
  
  created_user = user_repository.create_user(test_user_data_create, test_user_hashed_password)
  
  # 1. Delete the user
  was_deleted = user_repository.delete_user(created_user.id)
  assert was_deleted is True
  
  # 2. Verify deletion by attempting retrieval
  retrieved_user = user_repository.get_user_by_id(created_user.id)
  assert retrieved_user is None
  
  # 3. Verify attempting to delete again returns False
  was_deleted_again = user_repository.delete_user(created_user.id)
  assert was_deleted_again is False


def test_i_cannot_retrieve_non_existent_user_by_email(user_repository: SQLiteUserRepository):
  """Ensures retrieval by email returns None for non-existent email."""
  
  retrieved_user = user_repository.get_user_by_email("ghost@example.com")
  assert retrieved_user is None


def test_i_can_list_users_with_pagination(user_repository: SQLiteUserRepository,
                                          test_user_hashed_password: str):
  """Verifies that list_users returns paginated results correctly."""
  
  # Create multiple users
  for i in range(5):
    user_data = UserCreate(
      email=f"user{i}@example.com",
      username=f"User{i}",
      password="#Password123",
      roles=["user"],
      user_settings={}
    )
    user_repository.create_user(user_data, test_user_hashed_password)
  
  # Test: Get first 3 users
  users_page1 = user_repository.list_users(skip=0, limit=3)
  assert len(users_page1) == 3
  
  # Test: Get next 2 users
  users_page2 = user_repository.list_users(skip=3, limit=3)
  assert len(users_page2) == 2
  
  # Test: Verify no duplicates between pages
  page1_ids = {user.id for user in users_page1}
  page2_ids = {user.id for user in users_page2}
  assert len(page1_ids.intersection(page2_ids)) == 0


def test_i_can_list_users_with_default_pagination(user_repository: SQLiteUserRepository,
                                                  test_user_data_create: UserCreate,
                                                  test_user_hashed_password: str):
  """Verifies that list_users works with default parameters."""
  
  # Create 2 users
  user_repository.create_user(test_user_data_create, test_user_hashed_password)
  
  user_data2 = UserCreate(
    email="user2@example.com",
    username="User2",
    password="#Password123",
    roles=["user"],
    user_settings={}
  )
  user_repository.create_user(user_data2, test_user_hashed_password)
  
  # Test: Default parameters (skip=0, limit=100)
  users = user_repository.list_users()
  assert len(users) == 2
  assert all(isinstance(user.created_at, datetime) for user in users)


def test_i_get_empty_list_when_no_users_exist(user_repository: SQLiteUserRepository):
  """Verifies that list_users returns an empty list when no users exist."""
  
  users = user_repository.list_users()
  assert users == []
  assert isinstance(users, list)


def test_i_can_skip_beyond_available_users(user_repository: SQLiteUserRepository,
                                           test_user_data_create: UserCreate,
                                           test_user_hashed_password: str):
  """Verifies that skipping beyond available users returns an empty list."""
  
  user_repository.create_user(test_user_data_create, test_user_hashed_password)
  
  # Skip beyond the only user
  users = user_repository.list_users(skip=10, limit=10)
  assert users == []


def test_i_can_count_users(user_repository: SQLiteUserRepository,
                           test_user_hashed_password: str):
  """Verifies that count_users returns the correct number of users."""
  
  # Initial count should be 0
  assert user_repository.count_users() == 0
  
  # Create first user
  user_data1 = UserCreate(
    email="user1@example.com",
    username="User1",
    password="#Password123",
    roles=["user"],
    user_settings={}
  )
  user_repository.create_user(user_data1, test_user_hashed_password)
  assert user_repository.count_users() == 1
  
  # Create second user
  user_data2 = UserCreate(
    email="user2@example.com",
    username="User2",
    password="#Password123",
    roles=["user"],
    user_settings={}
  )
  user_repository.create_user(user_data2, test_user_hashed_password)
  assert user_repository.count_users() == 2


def test_i_get_zero_count_when_no_users_exist(user_repository: SQLiteUserRepository):
  """Verifies that count_users returns 0 when the database is empty."""
  
  count = user_repository.count_users()
  assert count == 0
  assert isinstance(count, int)


def test_list_users_returns_correct_user_structure(user_repository: SQLiteUserRepository,
                                                   test_user_data_create: UserCreate,
                                                   test_user_hashed_password: str):
  """Verifies that list_users returns UserInDB objects with all fields."""
  
  user_repository.create_user(test_user_data_create, test_user_hashed_password)
  
  users = user_repository.list_users()
  
  assert len(users) == 1
  user = users[0]
  
  # Verify all fields are present and correct type
  assert user.id is not None
  assert user.email == test_user_data_create.email
  assert user.username == test_user_data_create.username
  assert user.hashed_password == test_user_hashed_password
  assert isinstance(user.roles, list)
  assert isinstance(user.user_settings, dict)
  assert isinstance(user.is_verified, bool)
  assert isinstance(user.is_active, bool)
  assert isinstance(user.created_at, datetime)
  assert isinstance(user.updated_at, datetime)