use std::vec::Vec;

use failure::Error;

use crate::protocol::primitive::deserialize::{Deserialize, DeserializeUTF8};
use crate::protocol::primitive::serialize::{Serialize, SerializeUTF8};

use crate::protocol::primitive::BufferInfo;
use crate::protocol::primitive::String;

extern crate bytes;

#[derive(Clone, Debug, std::cmp::PartialEq)]
pub struct Message {
    pub msg_id: i32,    // The unique, sequential id for the message
    pub timestamp: i64, // The timestamp of the message in UNIX time (32-bit, seconds, 64-bit if LONGMESSAGE feature enabled)
    pub msg_type: MessageType,
    pub flags: i8,
    pub buffer: BufferInfo, // The buffer the message belongs to, usually everything but BufferId is set to NULL
    pub sender: String,     // The sender as nick!ident@host
    pub sender_prefixes: Option<String>, // The prefix modes of the sender
    pub real_name: Option<String>, // The realName of the sender
    pub avatar_url: Option<String>, // The avatarUrl of the sender, if available
    pub content: String, // The message content, already stripped from CTCP formatting, but containing mIRC format codes
}

impl Serialize for Message {
    fn serialize(&self) -> Result<Vec<u8>, Error> {
        let mut values: Vec<u8> = Vec::new();

        values.append(&mut i32::serialize(&self.msg_id)?);

        // TODO LONGMESSAGE feature
        if false {
            values.append(&mut i64::serialize(&self.timestamp)?);
        } else {
            values.append(&mut i32::serialize(&(self.timestamp as i32))?);
        }

        values.append(&mut i32::serialize(&(self.msg_type as i32))?);
        values.append(&mut i8::serialize(&(self.flags as i8))?);
        values.append(&mut BufferInfo::serialize(&self.buffer)?);
        values.append(&mut String::serialize_utf8(&self.sender)?);

        // TODO SenderPrefixes feature
        if false {
            if let Some(x) = &self.sender_prefixes {
                values.append(&mut String::serialize_utf8(&x)?);
            }
        }

        // TODO RichMessages feature
        if false {
            if let Some(x) = &self.real_name {
                values.append(&mut String::serialize_utf8(&x)?);
            }
            if let Some(x) = &self.avatar_url {
                values.append(&mut String::serialize_utf8(&x)?);
            }
        }

        values.append(&mut String::serialize_utf8(&self.content)?);

        return Ok(values);
    }
}

impl Deserialize for Message {
    fn parse(b: &[u8]) -> Result<(usize, Self), Error> {
        let mut pos = 0;
        let (parsed, msg_id) = i32::parse(&b[pos..])?;
        pos += parsed;

        // TODO LONGMESSAGES feature
        let timestamp;
        if false {
            let (parsed, temp_timestamp) = i64::parse(&b[pos..])?;
            pos += parsed;
            timestamp = temp_timestamp;
        } else {
            let (parsed, temp_timestamp) = i32::parse(&b[pos..])?;
            pos += parsed;
            timestamp = temp_timestamp as i64;
        }

        let (parsed, msg_type) = i32::parse(&b[pos..])?;
        pos += parsed;
        let (parsed, flags) = i8::parse(&b[pos..])?;
        pos += parsed;
        let (parsed, buffer) = BufferInfo::parse(&b[pos..])?;
        pos += parsed;
        let (parsed, sender) = String::parse_utf8(&b[pos..])?;
        pos += parsed;

        // TODO SenderPrefixes feature
        let mut sender_prefixes = None;
        if false {
            let (parsed, temp) = String::parse_utf8(&b[pos..])?;
            sender_prefixes = Some(temp);
            pos += parsed;
        }

        // TODO SenderPrefixes feature
        let mut real_name = None;
        let mut avatar_url = None;
        if false {
            let (parsed, temp) = String::parse_utf8(&b[pos..])?;
            real_name = Some(temp);
            pos += parsed;

            let (parsed, temp) = String::parse_utf8(&b[pos..])?;
            avatar_url = Some(temp);
            pos += parsed;
        }

        let (parsed, content) = String::parse_utf8(&b[pos..])?;
        pos += parsed;

        return Ok((
            pos,
            Self {
                msg_id,
                timestamp,
                msg_type: MessageType::from(msg_type),
                flags,
                buffer,
                sender,
                sender_prefixes,
                real_name,
                avatar_url,
                content,
            },
        ));
    }
}

#[repr(i32)]
#[derive(Copy, Clone, Debug, std::cmp::PartialEq)]
pub enum MessageType {
    Plain = 0x00000001,
    Notice = 0x00000002,
    Action = 0x00000004,
    Nick = 0x00000008,
    Mode = 0x00000010,
    Join = 0x00000020,
    Part = 0x00000040,
    Quit = 0x00000080,
    Kick = 0x00000100,
    Kill = 0x00000200,
    Server = 0x00000400,
    Info = 0x00000800,
    Error = 0x00001000,
    DayChange = 0x00002000,
    Topic = 0x00004000,
    NetsplitJoin = 0x00008000,
    NetsplitQuit = 0x00010000,
    Invite = 0x00020000,
}

impl From<i32> for MessageType {
    fn from(val: i32) -> Self {
        match val {
            0x00000001 => MessageType::Plain,
            0x00000002 => MessageType::Notice,
            0x00000004 => MessageType::Action,
            0x00000008 => MessageType::Nick,
            0x00000010 => MessageType::Mode,
            0x00000020 => MessageType::Join,
            0x00000040 => MessageType::Part,
            0x00000080 => MessageType::Quit,
            0x00000100 => MessageType::Kick,
            0x00000200 => MessageType::Kill,
            0x00000400 => MessageType::Server,
            0x00000800 => MessageType::Info,
            0x00001000 => MessageType::Error,
            0x00002000 => MessageType::DayChange,
            0x00004000 => MessageType::Topic,
            0x00008000 => MessageType::NetsplitJoin,
            0x00010000 => MessageType::NetsplitQuit,
            0x00020000 => MessageType::Invite,
            _ => unimplemented!(),
        }
    }
}