#!/usr/bin/env python3
"""
Скрипт для автоматического рефакторинга тестов.
Заменяет дублирующиеся функции на импорты из conftest.py.
"""

import re
from pathlib import Path

# Базовая директория
BASE_DIR = Path(__file__).parent

# Файлы для обновления
FILES = [
    "api/v1/employees/test_ldap_optional_register.py",
    "api/v1/employees/test_ldap_optional_groups.py",
    "api/v1/employees/test_role_assignment.py",
    "api/v1/employees/test_employees.py",
    "api/v1/employees/test_employees_fields_in_list.py",
    "api/v1/employees/test_email_verification_security.py",
    "api/v1/employees/test_department_roles_extra.py",
    "api/v1/employees/test_department_roles.py",
    "api/v1/employees/test_department_membership_separation.py",
    "api/v1/employees/test_department_head_rights.py",
    "api/v1/employees/test_departments.py",
    "api/v1/documents/test_documents_api.py",
    "api/v1/feed/test_posts.py",
    "api/v1/calendar_app/conftest.py",
    "api/v1/requests_app/conftest.py",
]


def add_imports(content: str) -> str:
    """Добавляет импорты если их нет."""
    lines = content.split("\n")

    # Находим последнюю строку импортов
    last_import_idx = 0
    for i, line in enumerate(lines):
        if line.startswith("import ") or line.startswith("from "):
            last_import_idx = i

    # Проверяем наличие импортов
    has_unique_phone = (
        "_unique_phone" in content and "from tests.conftest import" in content
    )
    has_password = (
        "DEFAULT_PASSWORD" in content and "from tests.test_config import" in content
    )

    imports_to_add = []
    if not has_unique_phone and "_unique_phone()" in content:
        imports_to_add.append("from tests.conftest import _unique_phone")
    if not has_password and 'password="pass"' in content:
        imports_to_add.append("from tests.test_config import DEFAULT_PASSWORD")

    if imports_to_add:
        # Вставляем после последнего импорта
        for imp in reversed(imports_to_add):
            lines.insert(last_import_idx + 1, imp)

    return "\n".join(lines)


def remove_duplicate_functions(content: str) -> str:
    """Удаляет дублирующиеся функции."""

    # Удаление _unique_phone
    patterns = [
        r'_phone_seq = count\(\d+\)\s*\n\s*\n\s*def _unique_phone\(\)[^\n]*:\s*return f"\+7999\{next\(_phone_seq\):[^}]+\}"',
        r'def _unique_phone\(\)[^\n]*:\s*(?:import random\s*)?return f"\+7999000\{[^}]+\}"',
        r'_seq = \d+\s*\n\s*def _uniq_phone\(\):\s*global _seq\s*_seq \+= 1\s*return f"\+7999\{_seq:[^}]+\}"',
    ]

    for pattern in patterns:
        content = re.sub(pattern, "", content, flags=re.MULTILINE)

    # Удаление _uniq_email
    pattern = r'def _uniq_email\([^)]*\):\s*global _seq\s*_seq \+= 1\s*return f"[^"]+"'
    content = re.sub(pattern, "", content, flags=re.MULTILINE)

    # Очистка лишних пустых строк
    content = re.sub(r"\n\n\n+", "\n\n", content)

    return content


def replace_function_calls(content: str) -> str:
    """Заменяет вызовы функций."""
    replacements = [
        (r"_uniq_email\(\)", "_unique_email()"),
        (r"_uniq_phone\(\)", "_unique_phone()"),
        (r'password="pass"', "password=DEFAULT_PASSWORD"),
    ]

    for old, new in replacements:
        content = content.replace(old, new)

    return content


def convert_make_user_to_fixture(content: str, filename: str) -> str:
    """Конвертирует функцию make_user в fixture."""

    # Если есть функция make_user, оборачиваем в fixture
    if (
        "def make_user(" in content
        and "@pytest.fixture" not in content.split("def make_user(")[0].split("\n")[-2]
    ):
        # Находим определение make_user
        pattern = r"(def make_user\([^)]*\)[^\n]*:)"
        match = re.search(pattern, content)
        if match:
            # Добавляем fixture перед функцией
            old_def = match.group(0)
            new_def = f'@pytest.fixture\n{old_def}\n    """Fixture для создания пользователей."""'
            content = content.replace(old_def, new_def, 1)

    return content


def process_file(file_path: Path) -> bool:
    """Обрабатывает один файл."""
    if not file_path.exists():
        print(f"  ⏭️  Файл не найден: {file_path}")
        return False

    try:
        content = file_path.read_text(encoding="utf-8")
        original = content

        # Применяем трансформации
        content = add_imports(content)
        content = remove_duplicate_functions(content)
        content = replace_function_calls(content)
        content = convert_make_user_to_fixture(content, file_path.name)

        if content != original:
            file_path.write_text(content, encoding="utf-8")
            print(f"  ✅ {file_path.name}")
            return True
        else:
            print(f"  ⏭️  {file_path.name} (без изменений)")
            return False

    except Exception as e:
        print(f"  ❌ {file_path.name}: {e}")
        return False


def main():
    print("🔄 Автоматический рефакторинг тестов\n")
    print("=" * 60)

    updated = 0
    for file_rel in FILES:
        file_path = BASE_DIR / file_rel
        if process_file(file_path):
            updated += 1

    print("=" * 60)
    print(f"\n✅ Обновлено: {updated}/{len(FILES)} файлов")
    print("\n📝 Рекомендуется проверить тесты:")
    print("  .venv/Scripts/python -m pytest backend/tests/api/v1/employees/ -v")


if __name__ == "__main__":
    main()