"""
silo_objects.py - Create FeaturePython proxy for Silo tree leaf nodes.

Each silo/ ZIP entry in a .kc file gets one SiloViewerObject in the
FreeCAD document tree. All properties are Transient so they are never
persisted in Document.xml.
"""

import FreeCAD


class SiloViewerObject:
    """Proxy for App::FeaturePython silo viewer nodes.

    Properties (all Transient):
        SiloPath    - ZIP entry path, e.g. "silo/manifest.json"
        ContentType - "json", "yaml", or "py"
        RawContent  - decoded UTF-8 content of the entry
    """

    def __init__(self, obj):
        obj.Proxy = self

        obj.addProperty(
            "App::PropertyString",
            "SiloPath",
            "Silo",
            "ZIP entry path of this silo item",
        )
        obj.addProperty(
            "App::PropertyString",
            "ContentType",
            "Silo",
            "Content type of this silo item",
        )
        obj.addProperty(
            "App::PropertyString",
            "RawContent",
            "Silo",
            "Raw text content of this silo entry",
        )

        obj.setPropertyStatus("SiloPath", "Transient")
        obj.setPropertyStatus("ContentType", "Transient")
        obj.setPropertyStatus("RawContent", "Transient")

        obj.setEditorMode("SiloPath", 1)  # read-only in property panel
        obj.setEditorMode("ContentType", 1)
        obj.setEditorMode("RawContent", 2)  # hidden in property panel

    def execute(self, obj):
        pass

    def mark_dirty(self):
        """Flag this object's content as modified by a viewer widget."""
        self._dirty = True

    def is_dirty(self):
        """Return True if content has been modified since last save."""
        return getattr(self, "_dirty", False)

    def clear_dirty(self):
        """Clear the dirty flag after saving."""
        self._dirty = False

    def __getstate__(self):
        return None

    def __setstate__(self, state):
        pass