#!/usr/bin/env python3
"""
User Management CLI Tool
Create, list, delete, and manage users for SMS Campaign Manager
"""

import sys
import os
import getpass
from pathlib import Path

# Add src to path
sys.path.insert(0, os.path.join(os.path.dirname(__file__), 'src'))

from core.user_auth import UserManager
from core.config import config

def print_header(text):
    """Print a formatted header"""
    print("\n" + "="*70)
    print(f"  {text}")
    print("="*70 + "\n")

def create_user_interactive(user_manager):
    """Interactively create a new user"""
    print_header("CREATE NEW USER")

    username = input("Username: ").strip()
    if not username:
        print("❌ Username cannot be empty")
        return

    # Check if user exists
    if user_manager.get_user_by_username(username):
        print(f"❌ User '{username}' already exists")
        return

    password = getpass.getpass("Password (min 8 characters): ")
    if len(password) < 8:
        print("❌ Password must be at least 8 characters")
        return

    password_confirm = getpass.getpass("Confirm password: ")
    if password != password_confirm:
        print("❌ Passwords do not match")
        return

    print("\nSelect role:")
    print("  1. Admin (full access)")
    print("  2. User (regular access)")
    role_choice = input("Choice [1-2]: ").strip()

    role = 'admin' if role_choice == '1' else 'user'

    email = input("Email (optional): ").strip() or None
    full_name = input("Full name (optional): ").strip() or None

    # Create user
    success = user_manager.create_user(username, password, role, email, full_name)

    if success:
        print(f"\n✅ User '{username}' created successfully (role: {role})")
    else:
        print(f"\n❌ Failed to create user '{username}'")

def list_users(user_manager):
    """List all users"""
    print_header("ALL USERS")

    users = user_manager.list_users()

    if not users:
        print("No users found")
        return

    # Print table header
    print(f"{'ID':<5} {'Username':<20} {'Role':<10} {'Created':<20} {'Last Login':<20}")
    print("-" * 80)

    for user in users:
        user_id = user.get('id', 'N/A')
        username = user.get('username', 'N/A')
        role = user.get('role', 'N/A')
        created = user.get('created_at', 'N/A')[:19] if user.get('created_at') else 'N/A'
        last_login = user.get('last_login', 'Never')[:19] if user.get('last_login') else 'Never'

        print(f"{user_id:<5} {username:<20} {role:<10} {created:<20} {last_login:<20}")

    print(f"\nTotal users: {len(users)}")

def delete_user_interactive(user_manager):
    """Interactively delete a user"""
    print_header("DELETE USER")

    username = input("Username to delete: ").strip()
    if not username:
        print("❌ Username cannot be empty")
        return

    # Check if user exists
    user = user_manager.get_user_by_username(username)
    if not user:
        print(f"❌ User '{username}' not found")
        return

    confirm = input(f"Are you sure you want to delete '{username}'? (yes/no): ").strip().lower()
    if confirm != 'yes':
        print("❌ Deletion cancelled")
        return

    success = user_manager.delete_user(username)

    if success:
        print(f"\n✅ User '{username}' deleted successfully")
    else:
        print(f"\n❌ Failed to delete user '{username}'")

def change_password_interactive(user_manager):
    """Interactively change user password"""
    print_header("CHANGE PASSWORD")

    username = input("Username: ").strip()
    if not username:
        print("❌ Username cannot be empty")
        return

    old_password = getpass.getpass("Current password: ")
    new_password = getpass.getpass("New password (min 8 characters): ")

    if len(new_password) < 8:
        print("❌ New password must be at least 8 characters")
        return

    new_password_confirm = getpass.getpass("Confirm new password: ")
    if new_password != new_password_confirm:
        print("❌ Passwords do not match")
        return

    success = user_manager.change_password(username, old_password, new_password)

    if success:
        print(f"\n✅ Password changed successfully for '{username}'")
    else:
        print(f"\n❌ Failed to change password. Check the current password.")

def main():
    """Main CLI interface"""
    print_header("📱 SMS Campaign Manager - User Management")

    # Initialize user manager
    try:
        user_manager = UserManager(config.DATABASE)
    except Exception as e:
        print(f"❌ Failed to initialize user manager: {e}")
        sys.exit(1)

    while True:
        print("\nChoose an option:")
        print("  1. Create new user")
        print("  2. List all users")
        print("  3. Delete user")
        print("  4. Change password")
        print("  5. Exit")

        choice = input("\nChoice [1-5]: ").strip()

        if choice == '1':
            create_user_interactive(user_manager)
        elif choice == '2':
            list_users(user_manager)
        elif choice == '3':
            delete_user_interactive(user_manager)
        elif choice == '4':
            change_password_interactive(user_manager)
        elif choice == '5':
            print("\n👋 Goodbye!")
            break
        else:
            print("❌ Invalid choice. Please select 1-5.")

if __name__ == '__main__':
    main()