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//! Chat messages.
pub mod client;
pub mod server;

use std::io::{Read, Write};
use std::io::Result as Res;

use endio::{Deserialize, LERead, LEWrite, Serialize};
use endio::LittleEndian as LE;

use crate::common::{LuVarWString, LuWString33, ObjId};

#[derive(Clone, Copy, Debug, Deserialize, PartialEq, Serialize)]
#[repr(u8)]
pub enum ChatChannel {
	SystemNotify,
	SystemWarning,
	SystemError,
	Broadcast,
	Local,
	LocalNoanim,
	Emote,
	Private,
	Team,
	TeamLocal,
	Guild,
	GuildNotify,
	Property,
	Admin,
	CombatDamage,
	CombatHealing,
	CombatLoot,
	CombatExp,
	CombatDeath,
	General,
	Trade,
	Lfg,
	User,
}

#[derive(Debug, PartialEq)]
pub struct GeneralChatMessage {
	pub chat_channel: ChatChannel,
	pub sender_name: LuWString33,
	pub sender: ObjId,
	pub source_id: u16,
	pub sender_gm_level: u8,
	pub message: LuVarWString<u32>,
}

impl<R: Read + LERead> Deserialize<LE, R> for GeneralChatMessage
where
	u8: Deserialize<LE, R>,
	u16: Deserialize<LE, R>,
	u32: Deserialize<LE, R>,
	LuWString33: Deserialize<LE, R>,
	ObjId: Deserialize<LE, R>,
{
	#[rustfmt::skip]
	fn deserialize(reader: &mut R) -> Res<Self> {
		let chat_channel     = LERead::read(reader)?;
		let mut str_len: u32 = LERead::read(reader)?;
		if chat_channel == ChatChannel::Team {
			str_len -= 1;
		}
		let sender_name      = LERead::read(reader)?;
		let sender           = LERead::read(reader)?;
		let source_id        = LERead::read(reader)?;
		let sender_gm_level  = LERead::read(reader)?;
		let message = LuVarWString::deser_content(reader, str_len)?;
		let _: u16           = LERead::read(reader)?;
		Ok(Self { chat_channel, sender_name, sender, source_id, sender_gm_level, message })
	}
}

impl<'a, W: Write + LEWrite> Serialize<LE, W> for &'a GeneralChatMessage
where
	u8: Serialize<LE, W>,
	u16: Serialize<LE, W>,
	u32: Serialize<LE, W>,
	&'a LuWString33: Serialize<LE, W>,
	ObjId: Serialize<LE, W>,
{
	fn serialize(self, writer: &mut W) -> Res<()> {
		LEWrite::write(writer, &self.chat_channel)?;
		let mut str_len = self.message.len();
		if self.chat_channel == ChatChannel::Team {
			str_len += 1;
		}
		LEWrite::write(writer, str_len as u32)?;
		LEWrite::write(writer, &self.sender_name)?;
		LEWrite::write(writer, self.sender)?;
		LEWrite::write(writer, self.source_id)?;
		LEWrite::write(writer, self.sender_gm_level)?;
		self.message.ser_content(writer)?;
		LEWrite::write(writer, 0u16)
	}
}

#[derive(Debug, Deserialize, PartialEq, Serialize)]
#[repr(u8)]
pub enum PrivateChatMessageResponseCode {
	Sent,
	NotOnline,
	GeneralError,
	ReceivedNewWhisper,
	NotFriends,
	SenderFreeTrial,
	ReceiverFreeTrial,
}

#[derive(Debug, PartialEq)]
pub struct PrivateChatMessage {
	pub chat_channel: ChatChannel,
	pub sender_name: LuWString33,
	pub sender: ObjId,
	pub source_id: u16,
	pub sender_gm_level: u8,
	pub recipient_name: LuWString33,
	pub recipient_gm_level: u8,
	pub response_code: PrivateChatMessageResponseCode,
	pub message: LuVarWString<u32>,
}

impl<R: Read + LERead> Deserialize<LE, R> for PrivateChatMessage
where
	u8: Deserialize<LE, R>,
	u16: Deserialize<LE, R>,
	u32: Deserialize<LE, R>,
	LuWString33: Deserialize<LE, R>,
	ObjId: Deserialize<LE, R>,
	PrivateChatMessageResponseCode: Deserialize<LE, R>,
{
	#[rustfmt::skip]
	fn deserialize(reader: &mut R) -> Res<Self> {
		let chat_channel       = LERead::read(reader)?;
		let mut str_len: u32       = LERead::read(reader)?;
		str_len -= 1;
		let sender_name        = LERead::read(reader)?;
		let sender             = LERead::read(reader)?;
		let source_id          = LERead::read(reader)?;
		let sender_gm_level    = LERead::read(reader)?;
		let recipient_name     = LERead::read(reader)?;
		let recipient_gm_level = LERead::read(reader)?;
		let response_code      = LERead::read(reader)?;
		let message = LuVarWString::deser_content(reader, str_len)?;
		let _: u16             = LERead::read(reader)?;
		Ok(Self { chat_channel, sender_name, sender, source_id, sender_gm_level, recipient_name, recipient_gm_level, response_code, message })
	}
}
impl<'a, W: Write + LEWrite> Serialize<LE, W> for &'a PrivateChatMessage
where
	u8: Serialize<LE, W>,
	u16: Serialize<LE, W>,
	u32: Serialize<LE, W>,
	&'a LuWString33: Serialize<LE, W>,
	ObjId: Serialize<LE, W>,
	&'a PrivateChatMessageResponseCode: Serialize<LE, W>,
{
	fn serialize(self, writer: &mut W) -> Res<()> {
		LEWrite::write(writer, &self.chat_channel)?;
		let mut str_len = self.message.len();
		str_len += 1;
		LEWrite::write(writer, str_len as u32)?;
		LEWrite::write(writer, &self.sender_name)?;
		LEWrite::write(writer, self.sender)?;
		LEWrite::write(writer, self.source_id)?;
		LEWrite::write(writer, self.sender_gm_level)?;
		LEWrite::write(writer, &self.recipient_name)?;
		LEWrite::write(writer, self.recipient_gm_level)?;
		LEWrite::write(writer, &self.response_code)?;
		self.message.ser_content(writer)?;
		LEWrite::write(writer, 0u16)
	}
}