import bpy
from bpy.types import Operator
from bpy.props import (BoolProperty,
                        EnumProperty,
                        PointerProperty,
                        CollectionProperty,
                        StringProperty)
from .. import fn

def collection_search_callback(self, context, edit_text):
    """Search callback for collection names"""
    ## second arg is not displayed, can be and empty string...
    return [(c.name, str(c.session_uid)) for c in bpy.context.scene.collection.children_recursive if edit_text.lower() in c.name.lower()]

class RT_OT_conform_collection_hierarchy(Operator):
    bl_idname = "rt.conform_collection_hierarchy"
    bl_label = "Conform Collection Hierarchy"
    bl_description = "Chek and conform collection visibility hierarchy settings\
        \nCan affect collection, objects or both"
    bl_options = {"REGISTER", "UNDO"}


    hierarchy_type: EnumProperty(
        name="Hierarchy Type",
        description="Choose whether to conform object hierarchy or collection hierarchy",
        items=[
            ('COLLECTION', "Collection Hierarchy", "Conform collection hierarchy")
            ('OBJECT', "Object Hierarchy", "Conform object hierarchy"),
        ],
        default='COLLECTION'
    )

    target_collection: StringProperty(
        name="Target Collecton",
        description="Collection to target", # or object name # (useful for excluded collections)
        default="",
        search=collection_search_callback
        ## basic collection fetch:
        # search=lambda self, context, edit_text: [(c.name, '') for c in bpy.context.scene.collection.children_recursive if edit_text.lower() in c.name.lower()]
    )

    affect_target: EnumProperty(
        name="Affect Target",
        description="Choose whether to affect collections, objects, or both",
        items=[
            ('COLLECTION', "Collection", "Affect collections only"),
            ('OBJECT', "Object", "Affect objects only"),
            ('BOTH', "Both", "Affect both collections and objects")
        ],
        default='BOTH'
    )

    ## Common object and collection 

    conform_selectability: BoolProperty(
        name="Hide Select State",
        description="Conform hide select select",
        default=True
    )

    conform_viewlayer: BoolProperty(
        name="Hide in Viewlayer State",
        description="Conform viewlayer temporary hide",
        default=True
    )
    
    conform_viewport: BoolProperty(
        name="Disable in Viewports State",
        description="Conform the monitor icon (global viewport disable)",
        default=True
    )

    conform_render: BoolProperty(
        name="Disable in Renders State",
        description="Conform the camera icon (render visibility)",
        default=True
    )

    ## Specific to collections

    conform_exclude: BoolProperty(
        name="Exclude View Layer State",
        description="Conform the exclude from view layer",
        default=True
    )

    conform_holdout: BoolProperty(
        name="Holdout State",
        description="Conform Collection Holdout State",
        default=True
    )

    conform_use_indirect: BoolProperty(
        name="Indirect Only State",
        description="Conform Collection Indirect Only",
        default=True
    )

    def invoke(self, context, event):
        return context.window_manager.invoke_props_dialog(self, width=400)

    def draw(self, context):
        layout = self.layout

        # if self.hierarchy_type == 'COLLECTION':
        layout.prop(self, "Get Collection by name")
        layout.prop(self, "affect_target", text="Target Items")

        # layout.prop(self, "target_name", text="Target Collection")
        ## Works with 'children' (root hierarchy), but not with 'children_recursive'
        # layout.prop_search(self, "target_name", bpy.context.scene.collection, "children", text="Target Collection")

        target_collection = None
        if not self.target_collection:
            target_collection = context.collection
            return

        if not self.target_collection:
            layout.label(text="Select a collection or search by name", icon='INFO')
            return
        
        root_col = next((c for c in context.scene.collection.children_recursive if c.name == target_collection), None)

        if not root_col:
            layout.label(text=f"Error: Collection '{target_collection}' not found", icon='ERROR')
            return

        vlc_root = fn.get_view_layer_collection(root_col)
        if not vlc_root:
            layout.label(text=f"Error: Viewlayer Collection '{target_collection}' not found", icon='ERROR')
            return

        ## TODO: Show current state of the selected root collection
        col = layout.column(align=True)

        row = layout.row(align=True)
        row.prop(vlc_root, "exclude", text="", emboss=False)
        row.prop(root_col, "hide_select", text="", emboss=False)
        row.prop(vlc_root, "hide_viewport", text="", emboss=False)
        row.prop(root_col, "hide_viewport", text="", emboss=False)
        row.prop(root_col, "hide_render", text="", emboss=False)
        row.prop(vlc_root, "holdout", text="", emboss=False)
        row.prop(vlc_root, "indirect_only", text="", emboss=False)

        col = layout.column(align=True)
        col.label(text="Parameter To Conform:")
        row = col.row(align=True)
        ## Same order, greyout unused options
        collec_row = row.row(align=True)
        collec_row.prop(self, "conform_exclude", text="", icon='CHECKBOX_HLT') # Exclude from View Layer
        collec_row.active = self.affect_target != 'OBJECT'

        ## Object and collections
        row.prop(self, "conform_selectability", text="", icon='RESTRICT_SELECT_OFF') # Hide Select
        row.prop(self, "conform_viewlayer", text="", icon='HIDE_OFF') # Hide in current viewlayer (eye)
        row.prop(self, "conform_viewport", text="", icon='RESTRICT_VIEW_OFF') # Disable in Viewports
        row.prop(self, "conform_render", text="", icon='RESTRICT_RENDER_OFF') # Disable in Renders
        
        ## Specific to collections        
        collec_row = row.row(align=True)
        collec_row.prop(self, "conform_holdout", text="", icon='HOLDOUT_OFF') # Holdout
        collec_row.prop(self, "conform_use_indirect", text="", icon='INDIRECT_ONLY_OFF') # Indirect Only
        collec_row.active = self.affect_target != 'OBJECT'

        ## TODO: Show live wich object / collection are affected by the conformation action when executed.

        sub_vlc = fn.get_collection_children_recursive(vlc_root)

    def execute(self, context):
        return {'FINISHED'}

# endregion


def register():
    bpy.utils.register_class(RT_OT_conform_collection_hierarchy)


def unregister():
    bpy.utils.unregister_class(RT_OT_conform_collection_hierarchy)