"""GUI-neutral adapter for the shared templates Balsam 167 CAN decoder."""

from __future__ import annotations

from protocan import balsam

from protocan import protocan as pc
from .shared_protocol import get_shared_protocol


def decode(raw_id: int, data: bytes, *, ide: bool = True,
           rtr: bool = False) -> pc.Decoded | None:
    if not ide or rtr or not balsam.is_balsam_id(raw_id):
        return None
    try:
        frame = balsam.decode(raw_id, data, native=get_shared_protocol())
    except ValueError as error:
        result = pc.Decoded(pc.ProtoCanId.parse(raw_id), len(data), bytes(data),
                            ide=ide, rtr=rtr, protocol="BALZAM 167")
        result.summary = "BALZAM: неверный кадр"
        result.fields = [("Протокол", "BALZAM 167"), ("Ошибка", str(error))]
        result.warnings.append(str(error))
        return result
    if frame is None:
        return None

    pid = pc.ProtoCanId(
        raw=frame.can_id, body=frame.start_address, msg_type=0,
        device=frame.device, device_type=0,
        pm=1 if frame.from_device else 0, priority=0,
    )
    result = pc.Decoded(pid, len(data), bytes(data), ide=ide, rtr=rtr,
                        protocol="BALZAM 167", device_label=frame.device_name,
                        message_label="BALZAM регистры")
    result.summary = frame.summary
    result.fields = [
        ("Протокол", "BALZAM 167 legacy eCAN"),
        ("Узел", "%d — %s" % (frame.device, frame.device_name)),
        ("Направление", "от устройства" if frame.from_device else "к устройству"),
        ("Начальный адрес", "0x%04X" % frame.start_address),
        ("Маска трёх слов", "0b%s" % format(frame.present_mask, "03b")),
    ]
    result.registers = [(item.address, item.value) for item in frame.registers]
    for item in frame.registers:
        result.fields.append((
            "0x%04X %s" % (item.address, item.name or "регистр"),
            "0x%04X (%d)" % (item.value, item.signed_value),
        ))
    if frame.present_mask == 0:
        result.warnings.append("В адресном слове не отмечен ни один регистр")
    return result