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

import bpy


ACTION_NAME = "WebGapAssignAction"
OBJECT_NAME = "WebGapAssignActionObject"


def action_state():
    obj = bpy.data.objects.get(OBJECT_NAME)
    if obj is None or obj.animation_data is None or obj.animation_data.action is None:
        raise RuntimeError("assign_action fixture 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],
                    })
    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-assign-action-desktop.py -- FIXTURE REPORT")
    fixture, output = (pathlib.Path(value).resolve() for value in arguments)
    output.unlink(missing_ok=True)
    bpy.ops.wm.open_mainfile(filepath=str(fixture), load_ui=False)
    before = action_state()
    try:
        poll = bool(bpy.ops.asset.assign_action.poll())
    except RuntimeError as error:
        if "context is incorrect" not in str(error):
            raise
        poll = False
    if poll:
        raise RuntimeError("asset.assign_action unexpectedly polled true without selected asset")
    try:
        bpy.ops.asset.assign_action()
    except RuntimeError as error:
        if "No asset selected or active" not in str(error) and "context is incorrect" not in str(error):
            raise
        operator_status = "CANCELLED"
    else:
        raise RuntimeError("asset.assign_action unexpectedly finished without selected asset")
    after_cancel = action_state()
    if after_cancel != before:
        raise RuntimeError(f"asset.assign_action cancellation changed Main data: {before} != {after_cancel}")

    with tempfile.NamedTemporaryFile(prefix="m16-assign-action-reopen-", suffix=".blend", dir=fixture.parent) as temporary:
        bpy.ops.wm.save_as_mainfile(filepath=temporary.name, check_existing=False, compress=True)
        bpy.ops.wm.open_mainfile(filepath=temporary.name, load_ui=False)
        after = action_state()
    if after != before:
        raise RuntimeError(f"asset.assign_action save/reopen drift: {before} != {after}")
    report = {
        "schemaVersion": 1,
        "task": "M16-GAP-00266",
        "operation": "ASSET_ASSIGN_ACTION_DESKTOP",
        "fixture": str(fixture),
        "fixtureSha256": hashlib.sha256(fixture.read_bytes()).hexdigest(),
        "before": before,
        "after": after,
        "poll": poll,
        "operatorStatus": operator_status,
        "mainMutation": "NONE",
        "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("asset-assign-action-desktop-ok poll=false status=CANCELLED mainMutation=none saveReopen=exact")


if __name__ == "__main__":
    try:
        main()
    except Exception as error:
        print(f"asset-assign-action-desktop-failed: {error}")
        raise SystemExit(1)