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

import bpy


def action_report():
    obj = bpy.data.objects.get("WebGapFrameJumpObject")
    if obj is None or obj.animation_data is None or obj.animation_data.action is None:
        raise RuntimeError("WebGapFrameJumpObject Action is missing")
    action = obj.animation_data.action
    channels = []
    for layer in action.layers:
        for strip in layer.strips:
            for bag in strip.channelbags:
                for curve in bag.fcurves:
                    channels.append({"path": curve.data_path, "index": curve.array_index, "frames": [round(float(keyframe.co.x), 6) for keyframe in curve.keyframe_points], "selected": [bool(keyframe.select_control_point) for keyframe in curve.keyframe_points]})
    channels.sort(key=lambda value: (value["path"], value["index"]))
    return {"name": action.name, "channels": channels}


def main():
    arguments = sys.argv[sys.argv.index("--") + 1:]
    if len(arguments) != 2:
        raise SystemExit("usage: blender -b --python check-action-frame-jump-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 = action_report()
    if bpy.context.scene.frame_current != 5 or any(channel["selected"] != [False, False, True] for channel in before["channels"]):
        raise RuntimeError(f"unexpected action.frame_jump result: frame={bpy.context.scene.frame_current} action={before}")
    descriptor, temporary = tempfile.mkstemp(prefix="m16-action-frame-jump-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 = action_report()
        frame_after = bpy.context.scene.frame_current
    finally:
        pathlib.Path(temporary).unlink(missing_ok=True)
    if before != after or frame_after != 5:
        raise RuntimeError("action.frame_jump save/reopen drift")
    report = {"schemaVersion": 1, "task": "M16-GAP-00122", "operation": "ACTION_FRAME_JUMP_DESKTOP", "fixture": str(fixture), "fixtureSha256": hashlib.sha256(fixture.read_bytes()).hexdigest(), "jumpedToFrame": 5, "action": 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-frame-jump-desktop-ok selectedFrame=5 currentFrame=5 saveReopen=exact")


if __name__ == "__main__":
    main()