use model::{AccountId, AccountState, Email, FullAccount, Login, PassHash, Role};
use sqlx::PgPool;

use super::Result;
use crate::{db_async_handler, Database};

#[derive(Debug, thiserror::Error)]
pub enum Error {
    #[error("Can't create account")]
    CantCreate,
    #[error("Can't find account does to lack of identity")]
    NoIdentity,
    #[error("Account does not exists")]
    NotExists,
    #[error("Failed to load all accounts")]
    All,
}

#[derive(actix::Message)]
#[rtype(result = "Result<Vec<FullAccount>>")]
pub struct AllAccounts;

db_async_handler!(AllAccounts, all_accounts, Vec<FullAccount>);

pub(crate) async fn all_accounts(_msg: AllAccounts, pool: PgPool) -> Result<Vec<FullAccount>> {
    sqlx::query_as(
        r#"
SELECT id, email, login, pass_hash, role, customer_id, state
FROM accounts
    "#,
    )
    .fetch_all(&pool)
    .await
    .map_err(|e| {
        log::error!("{e:?}");
        super::Error::Account(Error::All)
    })
}

#[derive(actix::Message)]
#[rtype(result = "Result<FullAccount>")]
pub struct CreateAccount {
    pub email: Email,
    pub login: Login,
    pub pass_hash: PassHash,
    pub role: Role,
}

db_async_handler!(CreateAccount, create_account, FullAccount);

pub(crate) async fn create_account(msg: CreateAccount, db: PgPool) -> Result<FullAccount> {
    sqlx::query_as(
        r#"
INSERT INTO accounts (login, email, role, pass_hash)
VALUES ($1, $2, $3, $4)
RETURNING id, email, login, pass_hash, role, customer_id, state
    "#,
    )
    .bind(msg.login)
    .bind(msg.email)
    .bind(msg.role)
    .bind(msg.pass_hash)
    .fetch_one(&db)
    .await
    .map_err(|e| {
        log::error!("{e:?}");
        super::Error::Account(Error::CantCreate)
    })
}

#[derive(actix::Message)]
#[rtype(result = "Result<FullAccount>")]
pub struct UpdateAccount {
    pub id: AccountId,
    pub email: Email,
    pub login: Login,
    pub pass_hash: Option<PassHash>,
    pub role: Role,
    pub state: AccountState,
}

db_async_handler!(UpdateAccount, update_account, FullAccount);

pub(crate) async fn update_account(msg: UpdateAccount, db: PgPool) -> Result<FullAccount> {
    match msg.pass_hash {
        Some(hash) => sqlx::query_as(
            r#"
UPDATE accounts
SET login = $2 AND email = $3 AND role = $4 AND pass_hash = $5 AND state = $6
WHERE id = $1
RETURNING id, email, login, pass_hash, role, customer_id, state
    "#,
        )
        .bind(msg.login)
        .bind(msg.email)
        .bind(msg.role)
        .bind(hash)
        .bind(msg.state),
        None => sqlx::query_as(
            r#"
UPDATE accounts
SET login = $2 AND email = $3 AND role = $4 AND pass_hash = $5
WHERE id = $1
RETURNING id, email, login, pass_hash, role, customer_id, state
    "#,
        )
        .bind(msg.login)
        .bind(msg.email)
        .bind(msg.role)
        .bind(msg.state),
    }
    .fetch_one(&db)
    .await
    .map_err(|e| {
        log::error!("{e:?}");
        super::Error::Account(Error::CantCreate)
    })
}

#[derive(actix::Message)]
#[rtype(result = "Result<FullAccount>")]
pub struct FindAccount {
    pub account_id: AccountId,
}

db_async_handler!(FindAccount, find_account, FullAccount);

pub(crate) async fn find_account(msg: FindAccount, db: PgPool) -> Result<FullAccount> {
    sqlx::query_as(
        r#"
SELECT id, email, login, pass_hash, role, customer_id, state
FROM accounts
WHERE id = $1
    "#,
    )
    .bind(msg.account_id)
    .fetch_one(&db)
    .await
    .map_err(|e| {
        log::error!("{e:?}");
        super::Error::Account(Error::NotExists)
    })
}

#[derive(actix::Message)]
#[rtype(result = "Result<FullAccount>")]
pub struct AccountByIdentity {
    pub login: Option<Login>,
    pub email: Option<Email>,
}

db_async_handler!(AccountByIdentity, account_by_identity, FullAccount);

pub(crate) async fn account_by_identity(msg: AccountByIdentity, db: PgPool) -> Result<FullAccount> {
    match (msg.login, msg.email) {
        (Some(login), None) => sqlx::query_as(
            r#"
SELECT id, email, login, pass_hash, role, customer_id, state
FROM accounts
WHERE login = $1
    "#,
        )
        .bind(login),
        (None, Some(email)) => sqlx::query_as(
            r#"
SELECT id, email, login, pass_hash, role, customer_id, state
FROM accounts
WHERE email = $1
    "#,
        )
        .bind(email),
        (Some(login), Some(email)) => sqlx::query_as(
            r#"
SELECT id, email, login, pass_hash, role, customer_id, state
FROM accounts
WHERE login = $1 AND email = $2
    "#,
        )
        .bind(login)
        .bind(email),
        _ => return Err(super::Error::Account(Error::NoIdentity)),
    }
    .fetch_one(&db)
    .await
    .map_err(|e| {
        log::error!("{e:?}");
        super::Error::Account(Error::CantCreate)
    })
}