#!/usr/bin/env python3
"""
Manual Migration Fix - Step by Step

This script provides step-by-step instructions to manually fix the migration conflicts.

Usage:
    python manual_migration_fix.py
"""

def print_step(step_num, title, commands, description):
    """Print a step with instructions"""
    print("\n" + "="*60)
    print(f"STEP {step_num}: {title}")
    print("="*60)
    print(description)
    print("\nRun these commands:")
    for i, cmd in enumerate(commands, 1):
        print(f"{i}. {cmd}")
    print("\nPress Enter after completing all commands...")
    input()

def main():
    """Main function"""
    print("="*80)
    print("MANUAL MIGRATION FIX - STEP BY STEP")
    print("="*80)
    print("This script will guide you through manually fixing the migration conflicts.")
    print("Follow each step carefully.")
    
    # Step 1: Reset migrations
    print_step(
        1,
        "RESET MIGRATIONS",
        [
            "python manage.py migrate users 0017",
            "python manage.py showmigrations users"
        ],
        "First, we'll reset the migrations to a stable point before the conflicts."
    )
    
    # Step 2: Remove conflicting migration files
    print_step(
        2,
        "REMOVE CONFLICTING MIGRATION FILES",
        [
            "Remove these files if they exist:",
            "  - users/migrations/0018_add_unassigned_date_field.py",
            "  - users/migrations/0019_alter_customuser_role.py", 
            "  - users/migrations/0019_remove_rolepermission_role_permis_role_056d99_idx_and_more.py",
            "  - users/migrations/0020_remove_rolepermission_role_permis_role_056d99_idx_and_more.py",
            "  - users/migrations/0021_update_module_field_length.py",
            "  - users/migrations/0022_remove_rolepermission_role_permis_role_056d99_idx_and_more.py"
        ],
        "Remove the conflicting migration files that are causing the issues."
    )
    
    # Step 3: Create new migration
    print_step(
        3,
        "CREATE NEW MIGRATION",
        [
            "python manage.py makemigrations users"
        ],
        "Create a new migration that includes all the necessary changes."
    )
    
    # Step 4: Apply migration
    print_step(
        4,
        "APPLY MIGRATION",
        [
            "python manage.py migrate users"
        ],
        "Apply the new migration to update the database."
    )
    
    # Step 5: Verify fix
    print_step(
        5,
        "VERIFY THE FIX",
        [
            "python manage.py shell",
            ">>> from django.db import connection",
            ">>> cursor = connection.cursor()",
            ">>> cursor.execute('SELECT COUNT(*) FROM user_permissions WHERE module = \\'test\\'')",
            ">>> print(cursor.fetchone())",
            ">>> exit()"
        ],
        "Verify that the user_permissions table is working correctly."
    )
    
    print("\n" + "="*80)
    print("MANUAL FIX COMPLETED!")
    print("="*80)
    print("If all steps were completed successfully, the user_permissions table")
    print("should now work correctly and the permission-based navigation system")
    print("should be functional.")
    print("\nNext steps:")
    print("1. Test the user permissions page")
    print("2. Try checking/unchecking permissions")
    print("3. Verify navigation items show/hide correctly")

if __name__ == '__main__':
    main()