use std::time::SystemTime;
use std::io::Write;
//use diesel::sql_types::Timestamp;
use diesel::{Insertable, Queryable, Identifiable, Associations, AsExpression, FromSqlRow};
//use bcrypt::{DEFAULT_COST, hash};
use diesel::pg::Pg;
use diesel::sql_types;
use diesel::deserialize::{self, FromSql};
use diesel::serialize::{self, ToSql, Output, IsNull};
use diesel::backend::Backend;

use libpso::character::settings;

use elseware::schema::*;

//const ELSEWHERE_COST: u32 = bcrypt::DEFAULT_COST;
const ELSEWHERE_COST: u32 = 5;

#[derive(Debug, AsExpression, FromSqlRow)]
#[sql_type="sql_types::Binary"]
pub struct EUserSettings(pub settings::UserSettings);

impl std::ops::Deref for EUserSettings {
    type Target = settings::UserSettings;

    fn deref(&self) -> &Self::Target {
        &self.0
    }
}

#[derive(Queryable, Identifiable, Debug)]
pub struct UserAccount {
    pub id: i32,
    pub username: String,
    pub password: String,
    pub guildcard: Option<i32>,
    pub team_id: Option<i32>,
    pub banned: bool,
    pub muted_until: SystemTime,
    pub created_at: SystemTime,
}

#[derive(Insertable)]
#[table_name="user_accounts"]
pub struct NewUser {
    username: String,
    password: String,
}

impl NewUser {
    pub fn new(username: String, password: String) -> NewUser {
        let crypt_password = bcrypt::hash(password, ELSEWHERE_COST).expect("could not hash password?");
        NewUser {
            username: username,
            password: crypt_password,
        }
    }
}

#[derive(Queryable, Identifiable, Associations)]
#[belongs_to(UserAccount, foreign_key="user_id")]
#[table_name="user_settings"]
pub struct UserSettings {
    pub id: i32,
    pub user_id: i32,
    //settings: Vec<u8>,
    pub settings: EUserSettings,
}

#[derive(Insertable, Debug)]
#[table_name="user_settings"]
pub struct NewUserSettings {
    pub user_id: i32,
    pub settings: EUserSettings,
}

impl ToSql<sql_types::Binary, Pg> for EUserSettings {
    fn to_sql<W: Write>(&self, out: &mut Output<W, Pg>) -> serialize::Result {
        out.write_all(&self.0.as_bytes()[..])
            .map(|_| IsNull::No)
            .map_err(|e| Box::new(e) as Box<dyn std::error::Error + Send + Sync>)
    }
}

impl FromSql<sql_types::Binary, Pg> for EUserSettings {
    fn from_sql(bytes: Option<&[u8]>) -> deserialize::Result<Self> {
        let bytes_vec: Vec<u8> = <Vec<u8> as FromSql<sql_types::Binary, Pg>>::from_sql(bytes)?;
        let mut static_bytes = [0u8; 0x1160];
        static_bytes[..0x1160].clone_from_slice(&bytes_vec);
        Ok(EUserSettings(settings::UserSettings::from_bytes(static_bytes)))
    }
}