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

use super::Result;
use crate::db_async_handler;

#[derive(Debug, Copy, Clone, PartialEq, serde::Serialize, thiserror::Error)]
pub enum Error {
    #[error("Can't create order item")]
    CantCreate,
    #[error("Can't find order item doe to lack of identity")]
    NoIdentity,
    #[error("Order item does not exists")]
    NotExists,
    #[error("Failed to load all order items")]
    All,
    #[error("Failed to load order items")]
    OrderItems,
}

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

db_async_handler!(AllOrderItems, all_order_items, Vec<OrderItem>);

pub(crate) async fn all_order_items(_msg: AllOrderItems, pool: PgPool) -> Result<Vec<OrderItem>> {
    sqlx::query_as(
        r#"
SELECT id, product_id, order_id, quantity, quantity_unit
FROM order_items
ORDER BY id DESC
    "#,
    )
    .fetch_all(&pool)
    .await
    .map_err(|e| {
        log::error!("{e:?}");
        Error::All.into()
    })
}

#[cfg_attr(feature = "dummy", derive(fake::Dummy))]
#[derive(actix::Message)]
#[rtype(result = "Result<OrderItem>")]
pub struct CreateOrderItem {
    pub product_id: ProductId,
    pub order_id: OrderId,
    pub quantity: Quantity,
    pub quantity_unit: QuantityUnit,
}

db_async_handler!(CreateOrderItem, inner_create_order_item, OrderItem);

async fn inner_create_order_item(msg: CreateOrderItem, db: PgPool) -> Result<OrderItem> {
    create_order_item(msg, &db).await
}

pub(crate) async fn create_order_item<'e, E>(msg: CreateOrderItem, db: E) -> Result<OrderItem>
where
    E: sqlx::Executor<'e, Database = sqlx::Postgres>,
{
    sqlx::query_as(
        r#"
INSERT INTO order_items (product_id, order_id, quantity, quantity_unit)
VALUES ($1, $2, $3, $4)
RETURNING id, product_id, order_id, quantity, quantity_unit
    "#,
    )
    .bind(msg.product_id)
    .bind(msg.order_id)
    .bind(msg.quantity)
    .bind(msg.quantity_unit)
    .fetch_one(db)
    .await
    .map_err(|e| {
        log::error!("{e:?}");
        super::Error::OrderItem(Error::CantCreate)
    })
}

#[derive(actix::Message)]
#[rtype(result = "Result<OrderItem>")]
pub struct FindOrderItem {
    pub id: OrderItemId,
}

db_async_handler!(FindOrderItem, find_order_item, OrderItem);

pub(crate) async fn find_order_item(msg: FindOrderItem, db: PgPool) -> Result<OrderItem> {
    sqlx::query_as(
        r#"
SELECT id, product_id, order_id, quantity, quantity_unit
FROM order_items
WHERE id = $1
    "#,
    )
    .bind(msg.id)
    .fetch_one(&db)
    .await
    .map_err(|e| {
        log::error!("{e:?}");
        Error::NotExists.into()
    })
}

#[derive(actix::Message)]
#[rtype(result = "Result<Vec<OrderItem>>")]
pub struct OrderItems {
    pub order_id: OrderId,
}

db_async_handler!(OrderItems, order_items, Vec<OrderItem>);

pub(crate) async fn order_items(msg: OrderItems, pool: PgPool) -> Result<Vec<OrderItem>> {
    sqlx::query_as(
        r#"
SELECT id, product_id, order_id, quantity, quantity_unit
FROM order_items
WHERE order_id = $1
ORDER BY id DESC
    "#,
    )
    .bind(msg.order_id)
    .fetch_all(&pool)
    .await
    .map_err(|e| {
        log::error!("{e:?}");
        Error::OrderItems.into()
    })
}