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

import bpy


def nla_report():
    obj = bpy.data.objects.get("WebGapStashObject")
    if obj is None or obj.animation_data is None:
        raise RuntimeError("WebGapStashObject animation data is missing")
    tracks = []
    for track in obj.animation_data.nla_tracks:
        tracks.append({
            "name": track.name,
            "strips": [{
                "name": strip.name,
                "action": strip.action.name if strip.action else None,
                "frameStart": round(float(strip.frame_start), 6),
                "frameEnd": round(float(strip.frame_end), 6),
            } for strip in track.strips],
        })
    return {"activeAction": obj.animation_data.action.name if obj.animation_data.action else None, "tracks": tracks}


def main():
    arguments = sys.argv[sys.argv.index("--") + 1:]
    if len(arguments) != 2:
        raise SystemExit("usage: blender -b --python check-action-stash-desktop.py -- FIXTURE REPORT")
    fixture, output = (pathlib.Path(value).resolve() for value in arguments)
    bpy.ops.wm.open_mainfile(filepath=str(fixture), load_ui=False)
    before = nla_report()
    if before["activeAction"] is not None or len(before["tracks"]) != 1 or len(before["tracks"][0]["strips"]) != 1:
        raise RuntimeError(f"unexpected action.stash result: {before}")
    descriptor, temporary = tempfile.mkstemp(prefix="m16-action-stash-reopen-", suffix=".blend")
    os.close(descriptor)
    try:
        bpy.ops.wm.save_as_mainfile(filepath=temporary, check_existing=False, compress=True)
        bpy.ops.wm.open_mainfile(filepath=temporary, load_ui=False)
        after = nla_report()
    finally:
        pathlib.Path(temporary).unlink(missing_ok=True)
    if before != after:
        raise RuntimeError(f"action.stash save/reopen drift: {before} != {after}")
    report = {
        "schemaVersion": 1,
        "task": "M16-GAP-00144",
        "operation": "ACTION_STASH_DESKTOP",
        "fixture": str(fixture),
        "fixtureSha256": hashlib.sha256(fixture.read_bytes()).hexdigest(),
        "nla": after,
        "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("action-stash-desktop-ok tracks=1 strips=1 activeAction=none saveReopen=exact")


if __name__ == "__main__":
    main()