/* 
    With this module we take care of getting all kinds of channel information out to the users
    Base prefix is "/channels"
*/
use diesel::{self, prelude::*};
use rocket_contrib::json::Json;
use std::vec::Vec;
use crate::models::{InsertableChannel, Channel};
use crate::auth::AuthResult;
use crate::{DBConn, schema, payload};
use crate::err::{self, DbError};

const VOICE_CHANNEL: i32 = 1;
const TEXT_CHANNEL: i32 = 2;

#[post("/create/<qname>/<perms>/<lim>/<ctype>")]
pub fn insert_new_channel(qname: String, perms: i32, lim: i32, ctype: i32, conn: DBConn) -> 
        DbError<Json<payload::ChannelIndexed>, err::DbResponse> {
    use schema::channels::dsl::*;

    let chan = InsertableChannel {
        name: qname,
        permissions: perms,
        limit: lim,
        type_: ctype,
    };
    let result = diesel::insert_into(channels)
        .values(&chan)
        .execute(&conn.0);

    match result {
        Ok(_d) => Ok(Json(payload::ChannelIndexed{name:chan.name, ctype:chan.type_})),
        Err(_e) => Err(err::DbResponse{err_msg:"Could not create channel"})
    }
}

pub fn get_channel_by_type(conn: &MysqlConnection, ctype: i32/*short for channel type*/) -> Result<Vec<Channel>, err::DbResponse> {
    use schema::channels::dsl::*;
    if let Ok(result) = channels.filter(type_.eq(ctype)).load(conn) {
        Ok(result)
    }
    else {
        Err(err::DbResponse{err_msg: "/channeels/list/<type> Could not query database"})
    }

}

#[get("/list/voice")]
pub fn get_voice_channels(conn: DBConn) -> AuthResult<Json<Vec<Channel>>, err::DbResponse> {
    let db_result = get_channel_by_type(&conn.0, VOICE_CHANNEL);
    // We have to rewrap the data given to us which is annoying but hey
    // at least its safe.jpg
    if let Ok(data) = db_result {
        Ok(Json(data))
    }
    else {
        Err(err::DbResponse{err_msg:"Could not query voice channels"})
    }
}


#[get("/list/text")]
pub fn get_text_chanels(conn: DBConn) -> DbError<Json<Vec<Channel>>, err::DbResponse> {
    let db_result = get_channel_by_type(&conn.0, TEXT_CHANNEL);
    if let Ok(data) = db_result {
        Ok(Json(data))
    }
    else {
        Err(err::DbResponse{err_msg:"Could not query text channels"})
    }
}

#[cfg(test)]
mod channel_tests {
    use super::*;
    use rocket; 
    use rocket::local::Client;
    use rocket::http::Status;
    use serde_json::from_str;

    macro_rules!  rocket_inst {
        ($func:expr) => {
            rocket::ignite()
                .mount("/channels", routes![$func])
                .attach(DBConn::fairing())
        }
    }

    #[test]
    fn generate_channels_test() {
        use diesel::mysql::MysqlConnection;
        use schema::channels::dsl::*;
        let conn = MysqlConnection::establish("mysql://freechat_dev:password@localhost:3306/freechat")
            .unwrap();

        let app = rocket_inst!(insert_new_channel);
        let client = Client::new(app).expect("bad rocket instance");
        
        let text_names = vec!["tone", "ttwo", "tthre"];
        for i in text_names.iter() {
            let uri = format!("/channels/create/{}/{}/{}/{}", i, 0, 0, TEXT_CHANNEL);
            let mut response = client.post(uri).dispatch();

            assert_eq!(response.status(), Status::Ok);

            let body = response.body_string().unwrap();
            let data: crate::payload::ChannelIndexed = from_str(&body).unwrap();
            assert_eq!(data.name, i.to_string());
        }

        let voice_names = vec!["voiceone", "voicetwo", "voicethre"];
        for i in voice_names.iter() {
            let uri = format!("/channels/create/{}/{}/{}/{}", i, 0, 0, VOICE_CHANNEL);
            let mut response = client.post(uri).dispatch();

            assert_eq!(response.status(), Status::Ok);

            let body = response.body_string().unwrap();
            let data: crate::payload::ChannelIndexed = from_str(&body).unwrap();
            assert_eq!(data.name, i.to_string());
        }
        let _ = diesel::delete(channels).filter(id.is_not_null())
            .execute(&conn)
            .expect("bro what the hell delete * from channels where id is not null;");
    }

    fn generate_dummy_channels() {
        let app = rocket_inst!(insert_new_channel);
        let client = Client::new(app).expect("bad rocket instance");
        
        let text_names = vec!["tone", "ttwo", "tthre"];
        for i in text_names.iter() {
            let uri = format!("/channels/create/{}/{}/{}/{}", i, 0, 0, TEXT_CHANNEL);
            let mut response = client.post(uri).dispatch();

            assert_eq!(response.status(), Status::Ok);

            let body = response.body_string().unwrap();
            let data: crate::payload::ChannelIndexed = from_str(&body).unwrap();
            assert_eq!(data.name, i.to_string());
        }

        let voice_names = vec!["voiceone", "voicetwo", "voicethre"];
        for i in voice_names.iter() {
            let uri = format!("/channels/create/{}/{}/{}/{}", i, 0, 0, VOICE_CHANNEL);
            let mut response = client.post(uri).dispatch();

            assert_eq!(response.status(), Status::Ok);

            let body = response.body_string().unwrap();
            let data: crate::payload::ChannelIndexed = from_str(&body).unwrap();
            assert_eq!(data.name, i.to_string());
        }
    }

    #[test]
    fn test_text_channels_get() {
        generate_dummy_channels();
        let app = rocket_inst!(get_voice_channels);

        let client = Client::new(app).expect("bad rocket instance");
        let mut response = client.get("/channels/text").dispatch();
        let _body: String = response.body_string().unwrap();
        
        assert_eq!(response.status(), Status::Ok);
        assert_ne!(response.status(), Status::NotFound);

        println!("succ me")
    }
}