#!/usr/bin/env python
# -*- coding: utf-8 -*-

"""
Tool - Module Reload Tool
Provides module reloading functionality for the plugin, supporting hot updates
"""

import sys
import importlib
import os
import traceback
from maya import cmds

def get_all_py_files(start_path):
    """
    Recursively get all .py files in the specified directory
    Returns: A list containing the paths of all .py files
    """
    py_files = []
    for root, dirs, files in os.walk(start_path):
        # Skip __pycache__ directory
        if '__pycache__' in dirs:
            dirs.remove('__pycache__')
        # Skip .git directory
        if '.git' in dirs:
            dirs.remove('.git')
        
        for file in files:
            if file.endswith('.py') and not file.startswith('__'):
                full_path = os.path.join(root, file)
                # Convert to module path format
                rel_path = os.path.relpath(full_path, start_path)
                module_path = os.path.splitext(rel_path)[0].replace(os.sep, '.')
                
                # Ensure module path format is correct
                if module_path.startswith("scripts."):
                    module_path = module_path[8:]
                elif module_path.startswith("Scripts."):
                    module_path = module_path[8:]
                
                py_files.append(module_path)
    return py_files

def reload_Tool():
    """
    Reload Tool and all its related modules
    """
    try:
        # Close existing Tool window
        if cmds.workspaceControl("ToolWorkspaceControl", exists=True):
            cmds.deleteUI("ToolWorkspaceControl", control=True)
        
        # Get scripts root directory
        SCRIPTS_PATH = os.path.dirname(os.path.dirname(__file__))
        print(f"Reloading modules, path: {SCRIPTS_PATH}")
        
        # List of priority modules to reload
        priority_modules = [
            "QtCompat",  # First reload Qt compatibility module
            "config",    # Then reload configuration module
            "utils",     # Then reload utility modules
            "ui"         # Finally reload UI modules
        ]
        
        # Get module paths for all .py files
        modules_to_reload = get_all_py_files(SCRIPTS_PATH)
        
        # Sort by module hierarchy, ensuring lower-level modules are reloaded first
        # First sort by priority, then by module hierarchy
        def module_sort_key(module_name):
            # Check if module is in priority list
            for i, prefix in enumerate(priority_modules):
                if module_name == prefix or module_name.startswith(prefix + "."):
                    return (i, len(module_name.split('.')))
            return (len(priority_modules), len(module_name.split('.')))
        
        modules_to_reload.sort(key=module_sort_key)
        
        print("Module reload order:")
        for i, module in enumerate(modules_to_reload):
            print(f"{i+1}. {module}")
        
        print("\nStarting module reload...")
        
        # Reload all modules
        reloaded_modules = set()
        for module_name in modules_to_reload:
            try:
                if module_name in sys.modules:
                    module = sys.modules[module_name]
                    # Save reference to original module object for recovery if reload fails
                    old_module = module
                    try:
                        importlib.reload(module)
                        reloaded_modules.add(module_name)
                        print(f"Module reloaded: {module_name}")
                    except Exception as e:
                        # Reload failed, restore original module
                        sys.modules[module_name] = old_module
                        print(f"Failed to reload module {module_name}: {str(e)}")
                        traceback.print_exc()
                else:
                    try:
                        # Try to import unloaded module
                        __import__(module_name)
                        print(f"Module imported: {module_name}")
                    except Exception as e:
                        print(f"Failed to import module {module_name}: {str(e)}")
            except Exception as e:
                print(f"Error processing module {module_name}: {str(e)}")
                traceback.print_exc()
        
        print(f"\nSuccessfully reloaded {len(reloaded_modules)} modules")
        
        # Reimport main module
        try:
            import Main
            importlib.reload(Main)
            
            # Show UI
            Main.main()
            
            print("Tool reloaded successfully!")
        except Exception as e:
            print(f"Error reloading main module: {str(e)}")
            traceback.print_exc()
        
        # Reload complete

    except Exception as e:
        error_msg = f"Error reloading Tool: {str(e)}"
        print(error_msg)
        cmds.warning(error_msg)
        traceback.print_exc()

def reload_all():
    """
    Execute reload and print separator lines
    """
    print("\n" + "="*50)
    print("Starting reload of Tool and all its modules")
    print("="*50 + "\n")
    reload_Tool()
    print("\n" + "="*50)
    print("Reload complete")


def reload_qt():
    """
    Reload Qt compatibility module
    """
    try:
        # Reload QtCompat module
        if "QtCompat" in sys.modules:
            module = sys.modules["QtCompat"]
            importlib.reload(module)
            print("QtCompat module reloaded")
            
            # Reinitialize Qt module
            if hasattr(module, "init_qt"):
                qt_version = module.init_qt()
                print(f"Qt module reinitialized: {qt_version}")
            
            return True
        else:
            try:
                import QtCompat
                print("QtCompat module imported")
                return True
            except Exception as e:
                print(f"Import QtCompat module failed: {str(e)}")
                return False
    except Exception as e:
        print(f"Reload Qt module failed: {str(e)}")
        traceback.print_exc()
        return False


# For backward compatibility, keep the original function name
def reload_Tool():
    """
    Function kept for backward compatibility
    """
    return reload_Tool()
    print("="*50 + "\n")

# Execute reload
# if __name__ == "__main__":
    # reload_all()