# -*- coding: utf-8 -*-
#!/usr/bin/env python3

import sys
import pkgutil
import importlib
import inspect
import os

from Qt import QtWidgets, QtCore, QtGui

# ------------------------------------------------------------------
# MONKEY-PATCH to fix "module 'qtpy.QtGui' has no attribute 'QUndoStack'"
try:
    from qtpy.QtWidgets import QUndoStack
    import qtpy
    qtpy.QtGui.QUndoStack = QUndoStack
except ImportError:
    print("WARNING: Could not monkey-patch QUndoStack. You may see an error if OdenGraphQt needs it.")
# ------------------------------------------------------------------

# ------------------------------------------------------------------
# MONKEY-PATCH to fix "'BackdropNodeItem' object has no attribute 'widgets'"
# by giving BackdropNodeItem a trivial widgets dictionary.
try:
    from OdenGraphQt.nodes.backdrop_node import BackdropNodeItem
    if not hasattr(BackdropNodeItem, "widgets"):
        BackdropNodeItem.widgets = {}
except ImportError:
    print("WARNING: Could not monkey-patch BackdropNodeItem to add `widgets`.")
# ------------------------------------------------------------------

# Import your data_manager so we can start the Flask server
from Modules import data_manager

# --- BEGIN ROBUST PATCH FOR QGraphicsScene.setSelectionArea ---
_original_setSelectionArea = QtWidgets.QGraphicsScene.setSelectionArea

def _patched_setSelectionArea(self, *args, **kwargs):
    """
    A robust patch that handles various call signatures for QGraphicsScene.setSelectionArea().
    """
    try:
        return _original_setSelectionArea(self, *args, **kwargs)
    except TypeError:
        if not args:
            raise
        painterPath = args[0]
        selection_op = QtCore.Qt.ReplaceSelection
        selection_mode = QtCore.Qt.IntersectsItemShape
        transform = QtGui.QTransform()
        return _original_setSelectionArea(self, painterPath, selection_op, selection_mode, transform)

QtWidgets.QGraphicsScene.setSelectionArea = _patched_setSelectionArea
# --- END PATCH ---

from OdenGraphQt import NodeGraph, BaseNode
from OdenGraphQt.widgets.dialogs import FileDialog

def import_nodes_from_folder(package_name):
    """
    Recursively import all modules from the given package.
    Returns a dictionary where keys are subfolder names, and values are lists of BaseNode subclasses.
    """
    nodes_by_category = {}
    package = importlib.import_module(package_name)
    package_path = package.__path__[0]

    for root, _, files in os.walk(package_path):
        rel_path = os.path.relpath(root, package_path).replace(os.sep, '.')
        module_prefix = f"{package_name}.{rel_path}" if rel_path != '.' else package_name
        category_name = os.path.basename(root)

        for file in files:
            if file.endswith(".py") and file != "__init__.py":
                module_name = f"{module_prefix}.{file[:-3]}"
                try:
                    module = importlib.import_module(module_name)
                    for name, obj in inspect.getmembers(module, inspect.isclass):
                        if issubclass(obj, BaseNode) and obj.__module__ == module.__name__:
                            if category_name not in nodes_by_category:
                                nodes_by_category[category_name] = []
                            nodes_by_category[category_name].append(obj)
                except Exception as e:
                    print(f"Failed to import {module_name}: {e}")
    
    return nodes_by_category

def make_node_command(graph, node_type_str):
    """
    Return a function that creates a node of the given type at the current cursor position.
    Ensures that only one FlyffCharacterStatusNode exists.
    """
    def real_create():
        if node_type_str.startswith("bunny-lab.io.flyff_character_status_node"):
            for node in graph.all_nodes():
                if node.__class__.__name__ == "FlyffCharacterStatusNode":
                    QtWidgets.QMessageBox.critical(
                        None,
                        "Error",
                        "Only one Flyff Character Status Collector node is allowed."
                    )
                    return
        try:
            pos = graph.cursor_pos()
            graph.create_node(node_type_str, pos=pos)
        except Exception as e:
            QtWidgets.QMessageBox.critical(None, "Error", str(e))

    def command():
        if QtWidgets.QApplication.instance():
            real_create()
        else:
            QtCore.QTimer.singleShot(0, real_create)

    return command

def ensure_workflows_folder():
    """
    Ensures a 'Workflows' subfolder exists.
    """
    if not os.path.exists("Workflows"):
        os.makedirs("Workflows")

def close_workflow(graph: NodeGraph):
    """
    Closes the current workflow (removes all nodes and connections).
    """
    graph.clear_session()

def save_workflow(graph: NodeGraph):
    """
    Saves the current workflow (including custom names, positions, wires, etc.) into a JSON file
    in the 'Workflows' subfolder.
    """
    ensure_workflows_folder()
    file_filter = "JSON Files (*.json);;All Files (*.*)"
    dlg = FileDialog.getSaveFileName(None, "Save Workflow", os.path.join("Workflows", ""), file_filter)
    file_path = dlg[0]
    if not file_path:
        return  # User canceled

    if not file_path.lower().endswith(".json"):
        file_path += ".json"

    try:
        graph.save_session(file_path)
        print(f"Workflow saved to {file_path}")
    except Exception as e:
        QtWidgets.QMessageBox.critical(None, "Error Saving Workflow", str(e))

def load_workflow(graph: NodeGraph):
    """
    Loads a workflow (including node values, connections, positions, etc.) from a specified JSON file.
    """
    ensure_workflows_folder()
    file_filter = "JSON Files (*.json);;All Files (*.*)"
    dlg = FileDialog.getOpenFileName(None, "Load Workflow", os.path.join("Workflows", ""), file_filter)
    file_path = dlg[0]
    if not file_path:
        return  # User canceled

    try:
        graph.load_session(file_path)
        print(f"Workflow loaded from {file_path}")
    except Exception as e:
        QtWidgets.QMessageBox.critical(None, "Error Loading Workflow", str(e))

if __name__ == "__main__":
    app = QtWidgets.QApplication([])

    # Start Flask API Server
    data_manager.start_api_server()

    # Create the NodeGraph
    graph = NodeGraph()
    graph.widget.setWindowTitle("Project Borealis - Workflow Automation System")

    # Dynamically import custom node classes from the 'Nodes' package.
    custom_nodes_by_category = import_nodes_from_folder("Nodes")

    # Register each node in its category
    for category, node_classes in custom_nodes_by_category.items():
        for node_class in node_classes:
            graph.register_node(node_class)

    # Create root context menu
    graph_context_menu = graph.get_context_menu("graph")

    # Create a top-level "Add Nodes" folder in the context menu
    add_nodes_menu = graph_context_menu.add_menu("Add Nodes")

    # Insert each category as a submenu under "Add Nodes"
    for category, node_classes in custom_nodes_by_category.items():
        category_menu = add_nodes_menu.add_menu(category)
        for node_class in node_classes:
            node_type = f"{node_class.__identifier__}.{node_class.__name__}"
            node_name = node_class.NODE_NAME
            category_menu.add_command(
                node_name,
                make_node_command(graph, node_type)
            )

    # Provide a way to remove selected nodes from the root menu (not in Add Nodes)
    graph_context_menu.add_command(
        "Remove Selected Node",
        lambda: [graph.remove_node(node) for node in graph.selected_nodes()] if graph.selected_nodes() else None
    )

    # Add a top-level "Workflows" menu for saving/loading/closing
    workflow_menu = graph_context_menu.add_menu("Workflows")
    workflow_menu.add_command("Load Workflow", lambda: load_workflow(graph))
    workflow_menu.add_command("Save Workflow", lambda: save_workflow(graph))
    workflow_menu.add_command("Close Workflow", lambda: close_workflow(graph))

    # ------------------------------------------------------------------
    # Custom stylesheet to control highlight color & overall QMenu look:
    # ------------------------------------------------------------------
    menu_stylesheet = """
    QMenu {
        background-color: rgb(30, 30, 30);
        border: 1px solid rgba(200, 200, 200, 60);
    }
    QMenu::item {
        padding: 5px 18px 2px;
        background-color: transparent;
    }
    QMenu::item:selected {
        color: rgb(255, 255, 255);
        background-color: rgb(60, 120, 180); /* set your highlight color here */
    }
    QMenu::separator {
        height: 1px;
        background: rgba(255,255,255,20);
        margin: 4px 8px;
    }
    """
    # Apply to each top-level menu. Submenus inherit from the parent menu.
    graph_context_menu.qmenu.setStyleSheet(menu_stylesheet)
    add_nodes_menu.qmenu.setStyleSheet(menu_stylesheet)
    workflow_menu.qmenu.setStyleSheet(menu_stylesheet)
    # ------------------------------------------------------------------

    # Grid styling changes
    graph.set_background_color(20, 20, 20)  # Dark gray
    graph.set_grid_color(60, 60, 60)        # Gray grid lines

    # Add gradient background
    scene = graph.scene()
    gradient = QtGui.QLinearGradient(0, 0, 0, 1)
    gradient.setCoordinateMode(QtGui.QGradient.ObjectBoundingMode)
    gradient.setColorAt(0.0, QtGui.QColor(9, 44, 68))
    gradient.setColorAt(0.3, QtGui.QColor(30, 30, 30))
    gradient.setColorAt(0.7, QtGui.QColor(30, 30, 30))
    gradient.setColorAt(1.0, QtGui.QColor(9, 44, 68))
    scene.setBackgroundBrush(QtGui.QBrush(gradient))

    # Resize and show the graph widget
    graph.widget.resize(1600, 900)
    graph.widget.show()

    # Global update function
    def global_update():
        for node in graph.all_nodes():
            if hasattr(node, "process_input"):
                try:
                    node.process_input()
                except Exception as e:
                    print("Error updating node", node, e)

    timer = QtCore.QTimer()
    timer.timeout.connect(global_update)
    timer.start(500)

    sys.exit(app.exec_())