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// This file is part of the CircuitPython project: https://circuitpython.org

//

// SPDX-FileCopyrightText: Copyright (c) 2020 Jeff Epler for Adafruit Industries

//

// SPDX-License-Identifier: MIT

#include "shared-bindings/canio/Message.h"

#include "py/obj.h"

#include "py/objproperty.h"

#include "py/runtime.h"

//| class Message:

//| def __init__(self, id: int, data: bytes, *, extended: bool = False) -> None:

//| """Construct a Message to send on a CAN bus.

//|

//| :param int id: The numeric ID of the message

//| :param bytes data: The content of the message

//| :param bool extended: True if the message has an extended identifier, False if it has a standard identifier

//|

//| In CAN, messages can have a length from 0 to 8 bytes.

//| """

//| ...

//|

static mp_obj_t canio_message_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *all_args) {

enum { ARG_id, ARG_data, ARG_extended, NUM_ARGS };

static const mp_arg_t allowed_args[] = {

{ MP_QSTR_id, MP_ARG_INT | MP_ARG_REQUIRED },

{ MP_QSTR_data, MP_ARG_OBJ | MP_ARG_REQUIRED },

{ MP_QSTR_extended, MP_ARG_BOOL, {.u_bool = false} },

};

mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];

MP_STATIC_ASSERT(MP_ARRAY_SIZE(allowed_args) == NUM_ARGS);

mp_arg_parse_all_kw_array(n_args, n_kw, all_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);

mp_buffer_info_t data;

mp_get_buffer_raise(args[ARG_data].u_obj, &data, MP_BUFFER_READ);

mp_arg_validate_length_range(data.len, 0, 8, MP_QSTR_data);

canio_message_obj_t *self = mp_obj_malloc(canio_message_obj_t, &canio_message_type);

common_hal_canio_message_construct(self, args[ARG_id].u_int, data.buf, data.len, args[ARG_extended].u_bool);

return self;

}

//| id: int

//| """The numeric ID of the message"""

static mp_obj_t canio_message_id_get(const mp_obj_t self_in) {

canio_message_obj_t *self = self_in;

return MP_OBJ_NEW_SMALL_INT(common_hal_canio_message_get_id(self));

}

MP_DEFINE_CONST_FUN_OBJ_1(canio_message_id_get_obj, canio_message_id_get);

static mp_obj_t canio_message_id_set(const mp_obj_t self_in, const mp_obj_t id) {

canio_message_obj_t *self = self_in;

common_hal_canio_message_set_id(self, mp_obj_get_int(id));

return mp_const_none;

}

MP_DEFINE_CONST_FUN_OBJ_2(canio_message_id_set_obj, canio_message_id_set);

MP_PROPERTY_GETSET(canio_message_id_obj,

(mp_obj_t)&canio_message_id_get_obj,

(mp_obj_t)&canio_message_id_set_obj);

//| data: bytes

//| """The content of the message"""

static mp_obj_t canio_message_data_get(const mp_obj_t self_in) {

canio_message_obj_t *self = self_in;

return mp_obj_new_bytes((const byte *)common_hal_canio_message_get_data(self), common_hal_canio_message_get_length(self));

}

MP_DEFINE_CONST_FUN_OBJ_1(canio_message_data_get_obj, canio_message_data_get);

static mp_obj_t canio_message_data_set(const mp_obj_t self_in, const mp_obj_t data_in) {

canio_message_obj_t *self = self_in;

mp_buffer_info_t data;

mp_get_buffer_raise(data_in, &data, MP_BUFFER_READ);

mp_arg_validate_length_range(data.len, 0, 8, MP_QSTR_data);

common_hal_canio_message_set_data(self, data.buf, data.len);

return mp_const_none;

}

MP_DEFINE_CONST_FUN_OBJ_2(canio_message_data_set_obj, canio_message_data_set);

MP_PROPERTY_GETSET(canio_message_data_obj,

(mp_obj_t)&canio_message_data_get_obj,

(mp_obj_t)&canio_message_data_set_obj);

//| extended: bool

//| """True if the message's id is an extended id"""

//|

//|

static mp_obj_t canio_message_extended_get(const mp_obj_t self_in) {

canio_message_obj_t *self = self_in;

return mp_obj_new_bool(common_hal_canio_message_get_extended(self));

}

MP_DEFINE_CONST_FUN_OBJ_1(canio_message_extended_get_obj, canio_message_extended_get);

static mp_obj_t canio_message_extended_set(const mp_obj_t self_in, const mp_obj_t extended) {

canio_message_obj_t *self = self_in;

common_hal_canio_message_set_extended(self, mp_obj_is_true(extended));

return mp_const_none;

}

MP_DEFINE_CONST_FUN_OBJ_2(canio_message_extended_set_obj, canio_message_extended_set);

MP_PROPERTY_GETSET(canio_message_extended_obj,

(mp_obj_t)&canio_message_extended_get_obj,

(mp_obj_t)&canio_message_extended_set_obj);

static const mp_rom_map_elem_t canio_message_locals_dict_table[] = {

{ MP_ROM_QSTR(MP_QSTR_id), MP_ROM_PTR(&canio_message_id_obj) },

{ MP_ROM_QSTR(MP_QSTR_data), MP_ROM_PTR(&canio_message_data_obj) },

{ MP_ROM_QSTR(MP_QSTR_extended), MP_ROM_PTR(&canio_message_extended_obj) },

};

static MP_DEFINE_CONST_DICT(canio_message_locals_dict, canio_message_locals_dict_table);

MP_DEFINE_CONST_OBJ_TYPE(

canio_message_type,

MP_QSTR_Message,

MP_TYPE_FLAG_HAS_SPECIAL_ACCESSORS,

make_new, canio_message_make_new,

locals_dict, &canio_message_locals_dict

);