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

def report():
    workspace = bpy.data.workspaces.get("WebGapWorkspace")
    if workspace is None: raise RuntimeError("WebGapWorkspace is missing")
    return {"id": "workspace:" + workspace.name, "name": workspace.name, "screenCount": len(workspace.screens)}

def main():
    arguments = sys.argv[sys.argv.index("--") + 1 :]
    if len(arguments) != 2: raise SystemExit("usage: blender -b --python check-workspace-desktop.py -- FIXTURE REPORT")
    fixture, output = (pathlib.Path(value).resolve() for value in arguments)
    bpy.ops.wm.open_mainfile(filepath=str(fixture)); before = report()
    descriptor, temporary = tempfile.mkstemp(prefix="m16-workspace-reopen-", suffix=".blend", dir=fixture.parent); os.close(descriptor)
    try:
        bpy.ops.wm.save_as_mainfile(filepath=temporary, check_existing=False, compress=True); bpy.ops.wm.open_mainfile(filepath=temporary); after = report()
    finally: pathlib.Path(temporary).unlink(missing_ok=True)
    if before != after: raise RuntimeError(f"workspace save/reopen drift: {before} != {after}")
    value = {"schemaVersion": 1, "task": "M16-GAP-00028", "operation": "WORKSPACE_DATABLOCK_DESKTOP", "fixture": str(fixture), "fixtureSha256": hashlib.sha256(fixture.read_bytes()).hexdigest(), "workspace": after, "saveReopen": "EXACT", "blenderVersion": bpy.app.version_string}
    output.parent.mkdir(parents=True, exist_ok=True); output.write_text(json.dumps(value, indent=2, sort_keys=True) + "\n", encoding="utf-8"); print(f"workspace-desktop-ok id={after['id']} saveReopen=exact")
if __name__ == "__main__": main()