import pathlib
import sys

import bpy


CATALOGS = (
    ("11111111-1111-4111-8111-111111111111", "Characters", "Characters"),
    ("22222222-2222-4222-8222-222222222222", "Characters/Heroes", "Heroes"),
    ("33333333-3333-4333-8333-333333333333", "Materials/Metal", "Metal"),
)


def set_metadata(asset, *, catalog_id, author, description, copyright_text, license_text,
                 tags, active_tag, preferred_import_method, properties):
    metadata = asset.asset_data
    metadata.catalog_id = catalog_id
    metadata.author = author
    metadata.description = description
    metadata.copyright = copyright_text
    metadata.license = license_text
    for tag in tags:
        metadata.tags.new(tag, skip_if_exists=False)
    metadata.active_tag = active_tag
    metadata.use_preferred_import_method = preferred_import_method is not None
    if preferred_import_method is not None:
        metadata.preferred_import_method = preferred_import_method
    for name, value in properties.items():
        metadata[name] = value


def write_catalog_definition(path):
    lines = [
        "# This is an Asset Catalog Definition file for Blender.",
        "#",
        "# Generated by M12-01B from a locked Blender 5.2 runtime.",
        "",
        "VERSION 1",
        "",
    ]
    lines.extend(f"{catalog_id}:{catalog_path}:{simple_name}" for catalog_id, catalog_path, simple_name in CATALOGS)
    path.write_text("\n".join(lines) + "\n", encoding="utf-8", newline="\n")


def main(output_directory):
    output = pathlib.Path(output_directory).resolve()
    output.mkdir(parents=True, exist_ok=True)
    bpy.ops.wm.read_factory_settings(use_empty=True)

    mesh = bpy.data.meshes.new("M12 Hero Mesh")
    mesh.from_pydata(((-1.0, -1.0, 0.0), (1.0, -1.0, 0.0), (0.0, 1.0, 0.0)), (), ((0, 1, 2),))
    hero = bpy.data.objects.new("M12 Hero", mesh)
    bpy.context.scene.collection.objects.link(hero)
    hero.asset_mark()
    set_metadata(
        hero,
        catalog_id=CATALOGS[1][0],
        author="M12 Artist",
        description="Desktop catalog v1 object fixture",
        copyright_text="Copyright 2026 M12 Fixture Authors",
        license_text="CC0-1.0",
        tags=("character", "hero", "rig-ready"),
        active_tag=1,
        preferred_import_method="APPEND",
        properties={"approved": True, "rating": 5, "source": "M12-01B"},
    )

    material = bpy.data.materials.new("M12 Brushed Metal")
    material.diffuse_color = (0.25, 0.3, 0.35, 1.0)
    material.asset_mark()
    set_metadata(
        material,
        catalog_id=CATALOGS[2][0],
        author="",
        description="",
        copyright_text="",
        license_text="",
        tags=("metal",),
        active_tag=0,
        preferred_import_method=None,
        properties={"roughness": 0.35},
    )

    world = bpy.data.worlds.new("M12 Uncataloged World")
    world.color = (0.02, 0.03, 0.04)
    world.asset_mark()
    set_metadata(
        world,
        catalog_id="",
        author="M12 Artist",
        description="Asset without a catalog assignment",
        copyright_text="",
        license_text="CC0-1.0",
        tags=(),
        active_tag=0,
        preferred_import_method="LINK",
        properties={},
    )

    catalog_path = output / "blender_assets.cats.txt"
    fixture_path = output / "m12_asset_catalog_v1.blend"
    write_catalog_definition(catalog_path)
    bpy.ops.wm.save_as_mainfile(filepath=str(fixture_path), compress=True)
    print(f"m12-asset-catalog-v1 fixture={fixture_path} catalogs={len(CATALOGS)} assets=3")


if __name__ == "__main__":
    arguments = sys.argv[sys.argv.index("--") + 1:] if "--" in sys.argv else []
    if len(arguments) != 1:
        raise SystemExit("usage: blender --background --factory-startup --python generate-asset-catalog-v1.py -- OUTPUT_DIRECTORY")
    main(arguments[0])