#[cfg(feature = "dummy")]
use fake::Fake;
use model::*;

use crate::{db_async_handler, Result};

#[derive(Debug, Copy, Clone, PartialEq, Eq, serde::Serialize, thiserror::Error)]
#[serde(rename_all = "kebab-case")]
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,
    #[error("Can't update account")]
    CantUpdate,
}

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

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

pub(crate) async fn all_accounts(
    _msg: AllAccounts,
    pool: &mut sqlx::Transaction<'_, sqlx::Postgres>,
) -> 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| {
        tracing::error!("{e:?}");
        super::Error::Account(Error::All)
    })
}

#[cfg_attr(feature = "dummy", derive(fake::Dummy))]
#[derive(actix::Message, Debug)]
#[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,
    inner_create_account
);

pub async fn create_account(
    msg: CreateAccount,
    pool: &mut sqlx::Transaction<'_, sqlx::Postgres>,
) -> 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(pool)
    .await
    .map_err(|e| {
        tracing::error!("{e:?}");
        super::Error::Account(Error::CantCreate)
    })
}

#[cfg_attr(feature = "dummy", derive(fake::Dummy))]
#[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,
    inner_update_account
);

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

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

db_async_handler!(FindAccount, find_account, FullAccount, inner_find_account);

pub(crate) async fn find_account(
    msg: FindAccount,
    pool: &mut sqlx::Transaction<'_, sqlx::Postgres>,
) -> 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(pool)
    .await
    .map_err(|e| {
        tracing::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,
    inner_account_by_identity
);

pub(crate) async fn account_by_identity(
    msg: AccountByIdentity,
    pool: &mut sqlx::Transaction<'_, sqlx::Postgres>,
) -> 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(pool)
    .await
    .map_err(|e| {
        tracing::error!("{e:?}");
        super::Error::Account(Error::CantCreate)
    })
}

#[cfg(test)]
mod tests {
    use config::UpdateConfig;
    use fake::Fake;
    use model::*;

    use crate::*;

    pub struct NoOpts;

    impl UpdateConfig for NoOpts {}

    async fn test_create_account(
        t: &mut sqlx::Transaction<'_, sqlx::Postgres>,
        login: Option<String>,
        email: Option<String>,
        hash: Option<String>,
    ) -> FullAccount {
        use fake::faker::internet::en;
        let login: String = login.unwrap_or_else(|| en::Username().fake());
        let email: String = email.unwrap_or_else(|| en::FreeEmail().fake());
        let hash: String = hash.unwrap_or_else(|| en::Password(10..20).fake());

        super::create_account(
            CreateAccount {
                email: Email::new(email),
                login: Login::new(login),
                pass_hash: PassHash::new(hash),
                role: Role::Admin,
            },
            t,
        )
        .await
        .unwrap()
    }

    #[actix::test]
    async fn create_account() {
        testx::db_t_ref!(t);

        let login: String = fake::faker::internet::en::Username().fake();
        let email: String = fake::faker::internet::en::FreeEmail().fake();
        let hash: String = fake::faker::internet::en::Password(10..20).fake();

        let account: FullAccount = super::create_account(
            CreateAccount {
                email: Email::new(&email),
                login: Login::new(&login),
                pass_hash: PassHash::new(&hash),
                role: Role::Admin,
            },
            &mut t,
        )
        .await
        .unwrap();

        let expected = FullAccount {
            login: Login::new(login),
            email: Email::new(email),
            pass_hash: PassHash::new(&hash),
            role: Role::Admin,
            customer_id: account.customer_id,
            id: account.id,
            state: AccountState::Active,
        };

        t.rollback().await.unwrap();
        assert_eq!(account, expected);
    }

    #[actix::test]
    async fn all_accounts() {
        testx::db_t_ref!(t);

        test_create_account(&mut t, None, None, None).await;
        test_create_account(&mut t, None, None, None).await;
        test_create_account(&mut t, None, None, None).await;

        let v: Vec<FullAccount> = super::all_accounts(AllAccounts, &mut t).await.unwrap();

        testx::db_rollback!(t);
        assert!(v.len() >= 3);
    }

    #[actix::test]
    async fn update_account_without_pass() {
        testx::db_t_ref!(t);

        let original_login: String = fake::faker::internet::en::Username().fake();
        let original_email: String = fake::faker::internet::en::FreeEmail().fake();
        let original_hash: String = fake::faker::internet::en::Password(10..20).fake();

        let original_account = test_create_account(
            &mut t,
            Some(original_login.clone()),
            Some(original_email.clone()),
            Some(original_hash.clone()),
        )
        .await;

        let updated_login: String = fake::faker::internet::en::Username().fake();
        let updated_email: String = fake::faker::internet::en::FreeEmail().fake();

        let updated_account: FullAccount = super::update_account(
            UpdateAccount {
                id: original_account.id,
                email: Email::new(updated_email.clone()),
                login: Login::new(updated_login.clone()),
                pass_hash: None,
                role: Role::Admin,
                state: AccountState::Active,
            },
            &mut t,
        )
        .await
        .unwrap();

        let expected = FullAccount {
            id: original_account.id,
            email: Email::new(updated_email),
            login: Login::new(updated_login),
            pass_hash: PassHash::new(original_hash),
            role: Role::Admin,
            customer_id: original_account.customer_id,
            state: AccountState::Active,
        };

        testx::db_rollback!(t);
        assert_ne!(original_account, expected);
        assert_eq!(updated_account, expected);
    }

    #[actix::test]
    async fn update_account_with_pass() {
        testx::db_t_ref!(t);

        let original_login: String = fake::faker::internet::en::Username().fake();
        let original_email: String = fake::faker::internet::en::FreeEmail().fake();
        let original_hash: String = fake::faker::internet::en::Password(10..20).fake();

        let original_account = test_create_account(
            &mut t,
            Some(original_login.clone()),
            Some(original_email.clone()),
            Some(original_hash.clone()),
        )
        .await;

        let updated_login: String = fake::faker::internet::en::Username().fake();
        let updated_email: String = fake::faker::internet::en::FreeEmail().fake();
        let updated_hash: String = fake::faker::internet::en::Password(10..20).fake();

        let updated_account: FullAccount = super::update_account(
            UpdateAccount {
                id: original_account.id,
                email: Email::new(updated_email.clone()),
                login: Login::new(updated_login.clone()),
                pass_hash: Some(PassHash::new(updated_hash.clone())),
                role: Role::Admin,
                state: AccountState::Active,
            },
            &mut t,
        )
        .await
        .unwrap();

        let expected = FullAccount {
            id: original_account.id,
            email: Email::new(updated_email),
            login: Login::new(updated_login),
            pass_hash: PassHash::new(updated_hash),
            role: Role::Admin,
            customer_id: original_account.customer_id,
            state: AccountState::Active,
        };

        testx::db_rollback!(t);
        assert_ne!(original_account, expected);
        assert_eq!(updated_account, expected);
    }

    #[actix::test]
    async fn find() {
        testx::db_t_ref!(t);

        let account = test_create_account(&mut t, None, None, None).await;

        let res: FullAccount = super::find_account(
            FindAccount {
                account_id: account.id,
            },
            &mut t,
        )
        .await
        .unwrap();

        testx::db_rollback!(t);
        assert_eq!(account, res);
    }

    #[actix::test]
    async fn find_identity_email() {
        testx::db_t_ref!(t);

        let account = test_create_account(&mut t, None, None, None).await;

        let res: FullAccount = super::account_by_identity(
            AccountByIdentity {
                email: Some(account.email.clone()),
                login: None,
            },
            &mut t,
        )
        .await
        .unwrap();

        testx::db_rollback!(t);
        assert_eq!(account, res);
    }

    #[actix::test]
    async fn find_identity_login() {
        testx::db_t_ref!(t);

        let account = test_create_account(&mut t, None, None, None).await;

        let res: FullAccount = super::account_by_identity(
            AccountByIdentity {
                login: Some(account.login.clone()),
                email: None,
            },
            &mut t,
        )
        .await
        .unwrap();

        testx::db_rollback!(t);
        assert_eq!(account, res);
    }
}