# Copyright (c) 2018 Ultimaker B.V.
# Cura is released under the terms of the LGPLv3 or higher.

from PyQt5.QtCore import Qt, pyqtSignal, pyqtProperty
from UM.Qt.ListModel import ListModel
from UM.Logger import Logger
from cura.Machines.Models.BaseMaterialsModel import BaseMaterialsModel

class MaterialTypesModel(ListModel):

    def __init__(self, parent = None):
        super().__init__(parent)

        self.addRoleName(Qt.UserRole + 1, "name")
        self.addRoleName(Qt.UserRole + 2, "brand")
        self.addRoleName(Qt.UserRole + 3, "colors")

class MaterialBrandsModel(BaseMaterialsModel):

    extruderPositionChanged = pyqtSignal()

    def __init__(self, parent = None):
        super().__init__(parent)

        self.addRoleName(Qt.UserRole + 1, "name")
        self.addRoleName(Qt.UserRole + 2, "material_types")

        self._update()

    def _update(self):
        if not self._canUpdate():
            return
        # Get updated list of favorites
        self._favorite_ids = self._material_manager.getFavorites()

        brand_item_list = []
        brand_group_dict = {}

        # Part 1: Generate the entire tree of brands -> material types -> spcific materials
        for root_material_id, container_node in self._available_materials.items():
            # Do not include the materials from a to-be-removed package
            if bool(container_node.getMetaDataEntry("removed", False)):
                continue

            # Add brands we haven't seen yet to the dict, skipping generics
            brand = container_node.getMetaDataEntry("brand", "")
            if brand.lower() == "generic":
                continue
            if brand not in brand_group_dict:
                brand_group_dict[brand] = {}

            # Add material types we haven't seen yet to the dict
            material_type = container_node.getMetaDataEntry("material", "")
            if material_type not in brand_group_dict[brand]:
                brand_group_dict[brand][material_type] = []

            # Now handle the individual materials
            item = self._createMaterialItem(root_material_id, container_node)
            brand_group_dict[brand][material_type].append(item)

        # Part 2: Organize the tree into models
        #
        # Normally, the structure of the menu looks like this:
        #     Brand -> Material Type -> Specific Material
        #
        # To illustrate, a branded material menu may look like this:
        #     Ultimaker ┳ PLA ┳ Yellow PLA
        #               ┃     ┣ Black PLA
        #               ┃     ┗ ...
        #               ┃
        #               ┗ ABS ┳ White ABS
        #                     ┗ ...
        for brand, material_dict in brand_group_dict.items():

            material_type_item_list = []
            brand_item = {
                "name": brand,
                "material_types": MaterialTypesModel(self)
            }

            for material_type, material_list in material_dict.items():
                material_type_item = {
                    "name": material_type,
                    "brand": brand,
                    "colors": BaseMaterialsModel(self)
                }
                material_type_item["colors"].clear()

                # Sort materials by name
                material_list = sorted(material_list, key = lambda x: x["name"].upper())
                material_type_item["colors"].setItems(material_list)

                material_type_item_list.append(material_type_item)

            # Sort material type by name
            material_type_item_list = sorted(material_type_item_list, key = lambda x: x["name"].upper())
            brand_item["material_types"].setItems(material_type_item_list)

            brand_item_list.append(brand_item)

        # Sort brand by name
        brand_item_list = sorted(brand_item_list, key = lambda x: x["name"].upper())
        self.setItems(brand_item_list)