import tkinter as tk
from tkinter import filedialog
import os
import sys
import traceback
import xml.etree.ElementTree as ET # Library to parse XML (AML)

# --- Configuration ---
TIA_PORTAL_VERSION = "18.0" # Target TIA Portal version

# --- TIA Scripting Import Handling ---
# (Same import handling as the previous script)
if os.getenv('TIA_SCRIPTING'):
    sys.path.append(os.getenv('TIA_SCRIPTING'))
else:
    pass

try:
    import siemens_tia_scripting as ts
except ImportError:
    print("ERROR: Failed to import 'siemens_tia_scripting'.")
    print("Ensure TIA Openness, the module, and Python 3.12.X are set up.")
    sys.exit(1)
except Exception as e:
    print(f"An unexpected error occurred during import: {e}")
    traceback.print_exc()
    sys.exit(1)

# --- Functions ---

def select_project_file():
    """Opens a dialog to select a TIA Portal project file."""
    root = tk.Tk()
    root.withdraw()
    file_path = filedialog.askopenfilename(
        title="Select TIA Portal Project File",
        filetypes=[(f"TIA Portal V{TIA_PORTAL_VERSION} Projects", f"*.ap{TIA_PORTAL_VERSION.split('.')[0]}")]
    )
    root.destroy()
    if not file_path:
        print("No project file selected. Exiting.")
        sys.exit(0)
    return file_path

def select_output_directory():
    """Opens a dialog to select the output directory."""
    root = tk.Tk()
    root.withdraw()
    dir_path = filedialog.askdirectory(
        title="Select Output Directory for AML and MD files"
    )
    root.destroy()
    if not dir_path:
        print("No output directory selected. Exiting.")
        sys.exit(0)
    return dir_path

def find_elements(element, path):
    """Helper to find elements using namespaces commonly found in AML."""
    # AutomationML namespaces often vary slightly or might be default
    # This basic approach tries common prefixes or no prefix
    namespaces = {
        '': element.tag.split('}')[0][1:] if '}' in element.tag else '', # Default namespace if present
        'caex': 'http://www.dke.de/CAEX', # Common CAEX namespace
        # Add other potential namespaces if needed based on file inspection
    }
    # Try finding with common prefixes or the default namespace
    for prefix, uri in namespaces.items():
         # Construct path with namespace URI if prefix is defined
         namespaced_path = path
         if prefix:
             parts = path.split('/')
             namespaced_parts = [f"{{{uri}}}{part}" if part != '.' else part for part in parts]
             namespaced_path = '/'.join(namespaced_parts)
         
         # Try findall with the constructed path
         found = element.findall(namespaced_path)
         if found:
             return found # Return first successful find

    # Fallback: try finding without explicit namespace (might work if default ns is used throughout)
    # This might require adjusting the path string itself depending on the XML structure
    try:
        # Simple attempt without namespace handling if the above fails
        return element.findall(path)
    except SyntaxError: # Handle potential errors if path isn't valid without namespaces
        return []


def parse_aml_to_markdown(aml_file_path, md_file_path):
    """Parses the AML file and generates a Markdown summary."""
    print(f"Parsing AML file: {aml_file_path}")
    try:
        tree = ET.parse(aml_file_path)
        root = tree.getroot()

        markdown_lines = ["# Project CAx Data Summary (AutomationML)", ""]

        # Find InstanceHierarchy - usually contains the project structure
        # Note: Namespace handling in ElementTree can be tricky. Adjust '{...}' part if needed.
        # We will use a helper function 'find_elements' to try common patterns
        instance_hierarchies = find_elements(root, './/InstanceHierarchy') # Common CAEX tag

        if not instance_hierarchies:
            markdown_lines.append("Could not find InstanceHierarchy in the AML file.")
            print("Warning: Could not find InstanceHierarchy element.")
        else:
             # Assuming the first InstanceHierarchy is the main one
            ih = instance_hierarchies[0]
            markdown_lines.append(f"## Instance Hierarchy: {ih.get('Name', 'N/A')}")
            markdown_lines.append("")

            # Look for InternalElements which represent devices/components
            internal_elements = find_elements(ih, './/InternalElement') # Common CAEX tag

            if not internal_elements:
                 markdown_lines.append("No devices (InternalElement) found in InstanceHierarchy.")
                 print("Info: No InternalElement tags found under InstanceHierarchy.")
            else:
                markdown_lines.append(f"Found {len(internal_elements)} device(s)/component(s):")
                markdown_lines.append("")
                markdown_lines.append("| Name | SystemUnitClass | RefBaseSystemUnitPath | Attributes |")
                markdown_lines.append("|---|---|---|---|")

                for elem in internal_elements:
                    name = elem.get('Name', 'N/A')
                    ref_path = elem.get('RefBaseSystemUnitPath', 'N/A') # Path to class definition
                    
                    # Try to get the class name from the RefBaseSystemUnitPath or SystemUnitClassLib
                    su_class_path = find_elements(elem, './/SystemUnitClass') # Check direct child first
                    su_class = su_class_path[0].get('Path', 'N/A') if su_class_path else ref_path.split('/')[-1] # Fallback to last part of path

                    attributes_md = ""
                    attributes = find_elements(elem, './/Attribute') # Find attributes
                    attr_list = []
                    for attr in attributes:
                        attr_name = attr.get('Name', '')
                        attr_value_elem = find_elements(attr, './/Value') # Get Value element
                        attr_value = attr_value_elem[0].text if attr_value_elem and attr_value_elem[0].text else 'N/A'
                        
                        # Look for potential IP addresses (common attribute names)
                        if "Address" in attr_name or "IP" in attr_name:
                           attr_list.append(f"**{attr_name}**: {attr_value}")
                        else:
                           attr_list.append(f"{attr_name}: {attr_value}")
                           
                    attributes_md = "<br>".join(attr_list) if attr_list else "None"


                    markdown_lines.append(f"| {name} | {su_class} | `{ref_path}` | {attributes_md} |")

        # Write to Markdown file
        with open(md_file_path, 'w', encoding='utf-8') as f:
            f.write("\n".join(markdown_lines))
        print(f"Markdown summary written to: {md_file_path}")

    except ET.ParseError as xml_err:
        print(f"ERROR parsing XML file {aml_file_path}: {xml_err}")
        with open(md_file_path, 'w', encoding='utf-8') as f:
            f.write(f"# Error\n\nFailed to parse AML file: {os.path.basename(aml_file_path)}\n\nError: {xml_err}")
    except Exception as e:
        print(f"ERROR processing AML file {aml_file_path}: {e}")
        traceback.print_exc()
        with open(md_file_path, 'w', encoding='utf-8') as f:
            f.write(f"# Error\n\nAn unexpected error occurred while processing AML file: {os.path.basename(aml_file_path)}\n\nError: {e}")


# --- Main Script ---

if __name__ == "__main__":
    print("--- TIA Portal Project CAx Exporter and Analyzer ---")

    # 1. Select Files/Folders
    project_file = select_project_file()
    output_dir = select_output_directory()

    print(f"\nSelected Project: {project_file}")
    print(f"Selected Output Directory: {output_dir}")

    # Define output file names
    project_base_name = os.path.splitext(os.path.basename(project_file))[0]
    aml_file = os.path.join(output_dir, f"{project_base_name}_CAx_Export.aml")
    md_file = os.path.join(output_dir, f"{project_base_name}_CAx_Summary.md")
    log_file = os.path.join(output_dir, f"{project_base_name}_CAx_Export.log") # Log file for the export process

    print(f"Will export CAx data to: {aml_file}")
    print(f"Will generate summary to: {md_file}")
    print(f"Export log file: {log_file}")


    portal_instance = None
    project_object = None
    cax_export_successful = False

    try:
        # 2. Connect to TIA Portal
        print(f"\nConnecting to TIA Portal V{TIA_PORTAL_VERSION}...")
        portal_instance = ts.open_portal(
            version=TIA_PORTAL_VERSION,
            portal_mode=ts.Enums.PortalMode.WithGraphicalUserInterface
        )
        print("Connected.")

        # 3. Open Project
        print(f"Opening project: {os.path.basename(project_file)}...")
        project_object = portal_instance.open_project(project_file_path=project_file)
        if project_object is None:
             project_object = portal_instance.get_project()
             if project_object is None:
                 raise Exception("Failed to open or get the specified project.")
        print("Project opened.")

        # 4. Export CAx Data (Project Level)
        print(f"Exporting CAx data for the project to {aml_file}...")
        # Ensure output directory exists for the log file as well
        os.makedirs(os.path.dirname(log_file), exist_ok=True)
        
        export_result = project_object.export_cax_data(export_file_path=aml_file, log_file_path=log_file) # [cite: 361]

        if export_result:
            print("CAx data exported successfully.")
            cax_export_successful = True
        else:
            print("CAx data export failed. Check the log file for details:")
            print(f"  Log file: {log_file}")
            # Write basic error message to MD file if export fails
            with open(md_file, 'w', encoding='utf-8') as f:
                 f.write(f"# Error\n\nCAx data export failed. Check log file: {log_file}")


    except ts.TiaException as tia_ex:
        print(f"\nTIA Portal Openness Error: {tia_ex}")
        traceback.print_exc()
    except FileNotFoundError:
        print(f"\nERROR: Project file not found at {project_file}")
    except Exception as e:
        print(f"\nAn unexpected error occurred during TIA interaction: {e}")
        traceback.print_exc()
    finally:
        # Close TIA Portal before processing the file (or detach)
        if portal_instance:
            try:
                print("\nClosing TIA Portal...")
                portal_instance.close_portal()
                print("TIA Portal closed.")
            except Exception as close_ex:
                print(f"Error during TIA Portal cleanup: {close_ex}")

    # 5. Parse AML and Generate Markdown (only if export was successful)
    if cax_export_successful:
        if os.path.exists(aml_file):
             parse_aml_to_markdown(aml_file, md_file)
        else:
             print(f"ERROR: Export was reported successful, but AML file not found at {aml_file}")
             with open(md_file, 'w', encoding='utf-8') as f:
                 f.write(f"# Error\n\nExport was reported successful, but AML file not found:\n{aml_file}")

    print("\nScript finished.")