/*
 * MIT License
 *
 * Copyright (c) [2022] [Ondrej Babec <ond.babec@gmail.com>]
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

use heapless::Vec;

use crate::encoding::variable_byte_integer::VariableByteIntegerEncoder;
use crate::packet::mqtt_packet::Packet;
use crate::utils::buffer_reader::BuffReader;
use crate::utils::buffer_writer::BuffWriter;

use super::packet_type::PacketType;
use super::property::Property;

pub struct PubrelPacket<'a, const MAX_PROPERTIES: usize> {
    // 7 - 4 mqtt control packet type, 3-0 flagy
    pub fixed_header: u8,
    // 1 - 4 B lenght of variable header + len of payload
    pub remain_len: u32,

    pub packet_identifier: u16,
    pub reason_code: u8,

    pub property_len: u32,

    // properties
    pub properties: Vec<Property<'a>, MAX_PROPERTIES>,
}

impl<'a, const MAX_PROPERTIES: usize> PubrelPacket<'a, MAX_PROPERTIES> {
    pub fn decode_puback_packet(&mut self, buff_reader: &mut BuffReader<'a>) {
        if self.decode_fixed_header(buff_reader) != (PacketType::Pubrel).into() {
            log::error!("Packet you are trying to decode is not PUBREL packet!");
            return;
        }
        self.packet_identifier = buff_reader.read_u16().unwrap();
        self.reason_code = buff_reader.read_u8().unwrap();
        self.decode_properties(buff_reader);
    }
}

impl<'a, const MAX_PROPERTIES: usize> Packet<'a> for PubrelPacket<'a, MAX_PROPERTIES> {
    fn new() -> Self {
        todo!()
    }

    fn encode(&mut self, buffer: &mut [u8]) -> usize {
        let mut buff_writer = BuffWriter::new(buffer);

        let mut rm_ln = self.property_len;
        let property_len_enc: [u8; 4] =
            VariableByteIntegerEncoder::encode(self.property_len).unwrap();
        let property_len_len = VariableByteIntegerEncoder::len(property_len_enc);
        rm_ln = rm_ln + property_len_len as u32 + 3;

        buff_writer.write_u8(self.fixed_header);
        buff_writer.write_variable_byte_int(rm_ln);
        buff_writer.write_u16(self.packet_identifier);
        buff_writer.write_u8(self.reason_code);
        buff_writer.write_variable_byte_int(self.property_len);
        buff_writer.encode_properties::<MAX_PROPERTIES>(&self.properties);
        return buff_writer.position;
    }

    fn decode(&mut self, buff_reader: &mut BuffReader<'a>) {
        self.decode_puback_packet(buff_reader);
    }

    fn set_property_len(&mut self, value: u32) {
        self.property_len = value;
    }

    fn get_property_len(&mut self) -> u32 {
        return self.property_len;
    }

    fn push_to_properties(&mut self, property: Property<'a>) {
        self.properties.push(property);
    }

    fn set_fixed_header(&mut self, header: u8) {
        self.fixed_header = header;
    }

    fn set_remaining_len(&mut self, remaining_len: u32) {
        self.remain_len = remaining_len;
    }
}