"""Remove the auto-generated simple collision from the site meshes, keeping their triangles.

    <engine>/UnrealEditor-Cmd <uproject> -run=pythonscript \
        -script=<repo>/Tools/unreal/ue_clear_simple_collision.py -nullrhi -unattended -nopause -stdout

Why: the FBX import runs with `auto_generate_collision`, which adds ONE convex hull per mesh. For a
279 m terrain or road that hull is a giant slab, and any *physics body* inside it - the Chaos vehicle -
is pushed out of the hull every frame. Walked characters never notice, because character movement
sweeps instead of resolving penetration, which is why the player was fine while the car was thrown
into the air.

Clearing the hulls leaves `CTF_USE_COMPLEX_AS_SIMPLE`, so traces and physics use the real triangles.

Result: /tmp/gigline/clear-simple-collision.txt
"""

import unreal

FOLDERS = ("/Game/Hollywood/Site", "/Game/Hollywood/Streets")
RESULT = "/tmp/gigline/clear-simple-collision.txt"
lines = []


def log(message):
    lines.append(str(message))
    unreal.log(str(message))


def main():
    cleared = 0
    for folder in FOLDERS:
        for path in unreal.EditorAssetLibrary.list_assets(folder, recursive=False):
            mesh = unreal.EditorAssetLibrary.load_asset(path)
            if not isinstance(mesh, unreal.StaticMesh):
                continue
            body = mesh.get_editor_property("body_setup")
            if body is None:
                continue
            agg = body.get_editor_property("agg_geom")
            convex = len(agg.get_editor_property("convex_elems"))
            boxes = len(agg.get_editor_property("box_elems"))
            if not convex and not boxes:
                continue
            agg.set_editor_property("convex_elems", [])
            agg.set_editor_property("box_elems", [])
            body.set_editor_property("agg_geom", agg)
            body.set_editor_property("collision_trace_flag",
                                     unreal.CollisionTraceFlag.CTF_USE_COMPLEX_AS_SIMPLE)
            mesh.set_editor_property("body_setup", body)
            unreal.EditorAssetLibrary.save_loaded_asset(mesh)
            log(f"{mesh.get_name()}: cleared {convex} convex, {boxes} box, complex-as-simple")
            cleared += 1
    lines.append(f"VERDICT: {'PASS' if cleared else 'NOTHING-TO-DO'}")
    log(f"{cleared} meshes cleared")


try:
    main()
except Exception as exc:  # noqa: BLE001
    import traceback
    log(f"FAILED: {type(exc).__name__}: {exc}")
    log(traceback.format_exc())
    lines.append("VERDICT: FAIL")

with open(RESULT, "w") as f:
    f.write("\n".join(lines) + "\n")