#!/usr/bin/env python3
import hashlib
import json
import os
import pathlib
import shutil
import sys
import tempfile
import bpy

ARMATURE_NAME = "WebGapArmatureSelectMoreArmature"
OBJECT_NAME = "WebGapArmatureSelectMoreObject"
ROOT_BONE = "WebGapArmatureSelectMoreRoot"
CHILD_BONE = "WebGapArmatureSelectMoreChild"
GRANDCHILD_BONE = "WebGapArmatureSelectMoreGrandchild"
OTHER_BONE = "WebGapArmatureSelectMoreOther"

def vec(value): return [round(float(x), 6) for x in value]
def ensure():
    obj = bpy.data.objects.get(OBJECT_NAME); armature = bpy.data.armatures.get(ARMATURE_NAME)
    if armature is None or obj is None or obj.type != "ARMATURE" or obj.data != armature: raise RuntimeError("armature.select_more fixture is missing")
    bpy.context.view_layer.objects.active = obj; obj.select_set(True)
    if obj.mode != "EDIT": bpy.ops.object.mode_set(mode="EDIT")
    return armature
def bone_report(bone): return {"name": bone.name, "selected": bool(bone.select), "hidden": bool(bone.hide), "selectHead": bool(bone.select_head), "selectTail": bool(bone.select_tail), "parent": bone.parent.name if bone.parent else None, "connected": bool(bone.use_connect), "head": vec(bone.head), "tail": vec(bone.tail)}
def state():
    armature = ensure(); return {"object": OBJECT_NAME, "armature": ARMATURE_NAME, "activeBone": armature.edit_bones.active.name if armature.edit_bones.active else None, "bones": [bone_report(bone) for bone in armature.edit_bones]}
def stable(value): return {"object": value["object"], "armature": value["armature"], "activeBone": value["activeBone"], "bones": sorted([{key: bone[key] for key in ("name", "selected", "hidden", "parent", "connected", "head", "tail")} for bone in value["bones"]], key=lambda bone: bone["name"])}
def main():
    args = sys.argv[sys.argv.index("--") + 1:]
    if len(args) != 2: raise SystemExit("usage: blender -b --factory-startup --python check-action-armature-select-more-desktop.py -- FIXTURE REPORT")
    fixture, output = (pathlib.Path(value).resolve() for value in args); bpy.ops.wm.open_mainfile(filepath=str(fixture), load_ui=False); before = state(); by_name = {bone["name"]: bone for bone in before["bones"]}
    if by_name[ROOT_BONE]["selected"] and not by_name[CHILD_BONE]["selected"] and not by_name[GRANDCHILD_BONE]["selected"] and not by_name[OTHER_BONE]["selected"]: already = False
    elif by_name[ROOT_BONE]["selected"] and by_name[CHILD_BONE]["selected"] and not by_name[GRANDCHILD_BONE]["selected"] and not by_name[OTHER_BONE]["selected"]: already = True
    else: raise RuntimeError(f"unexpected armature.select_more state: {before}")
    ensure(); poll = bool(bpy.ops.armature.select_more.poll())
    if not poll: raise RuntimeError("ARMATURE_OT_select_more poll failed")
    if not already and bpy.ops.armature.select_more() != {"FINISHED"}: raise RuntimeError("ARMATURE_OT_select_more did not finish")
    after = state(); by_name = {bone["name"]: bone for bone in after["bones"]}
    if not by_name[ROOT_BONE]["selected"] or not by_name[CHILD_BONE]["selected"] or by_name[GRANDCHILD_BONE]["selected"] or by_name[OTHER_BONE]["selected"]: raise RuntimeError(f"select_more chain mismatch: {after}")
    bpy.ops.object.mode_set(mode="OBJECT"); fd, temporary = tempfile.mkstemp(prefix="m16-armature-select-more-reopen-", suffix=".blend"); os.close(fd); temporary_path = pathlib.Path(temporary)
    try:
        bpy.ops.wm.save_as_mainfile(filepath=str(temporary_path), check_existing=False, compress=True); bpy.ops.wm.open_mainfile(filepath=str(temporary_path), load_ui=False); reopened = state()
        if stable(reopened) != stable(after): raise RuntimeError(f"armature.select_more save/reopen drift: {after} != {reopened}")
        shutil.copyfile(temporary_path, fixture)
        report = {"schemaVersion": 1, "task": "M16-GAP-00256", "operation": "ARMATURE_SELECT_MORE_DESKTOP", "fixture": str(fixture), "fixtureSha256": hashlib.sha256(fixture.read_bytes()).hexdigest(), "before": before, "after": reopened, "selectedChain": [ROOT_BONE, CHILD_BONE, GRANDCHILD_BONE], "unselectedBone": OTHER_BONE, "operatorStatus": "FINISHED" if not already else "SKIPPED_ALREADY_APPLIED", "mainMutation": "CONNECTED_CHAIN_SELECTED" if not already else "CONNECTED_CHAIN_ALREADY_SELECTED", "poll": poll, "saveReopen": "EXACT", "blenderVersion": bpy.app.version_string}
        output.parent.mkdir(parents=True, exist_ok=True); output.write_text(json.dumps(report, indent=2, sort_keys=True) + "\n", encoding="utf-8"); print("armature-select-more-desktop-ok chain=3 saveReopen=exact")
    finally: temporary_path.unlink(missing_ok=True)
if __name__ == "__main__":
    try: main()
    except Exception as error: print(f"armature-select-more-desktop-failed: {error}"); raise SystemExit(1)