use chrono::NaiveDateTime;
use derive_more::Deref;
#[cfg(feature = "dummy")]
use fake::Fake;
use serde::{Deserialize, Serialize};

use crate::*;

#[derive(Serialize, Deserialize, Debug)]
pub struct Failure {
    pub errors: Vec<String>,
}

#[derive(Serialize, Deserialize, Debug, Default)]
pub struct Config {
    pub pay_methods: Vec<PaymentMethod>,
    pub coupons: bool,
    pub currency: String,
    pub shipping: bool,
    pub shipping_methods: Vec<ShippingMethod>,
}

#[cfg_attr(feature = "dummy", derive(fake::Dummy))]
#[derive(Serialize, Deserialize, Debug)]
#[serde(transparent)]
pub struct AccountOrders(pub Vec<AccountOrder>);

impl From<(Vec<crate::AccountOrder>, Vec<crate::OrderItem>)> for AccountOrders {
    fn from((orders, mut items): (Vec<crate::AccountOrder>, Vec<crate::OrderItem>)) -> Self {
        Self(
            orders
                .into_iter()
                .map(
                    |crate::AccountOrder {
                         id,
                         buyer_id,
                         status,
                         order_id,
                         order_ext_id: _,
                         service_order_id: _,
                         checkout_notes,
                     }| {
                        AccountOrder {
                            id,
                            buyer_id,
                            status,
                            order_id,
                            items: items.drain_filter(|item| item.order_id == id).collect(),
                            checkout_notes,
                        }
                    },
                )
                .collect(),
        )
    }
}

impl From<(crate::AccountOrder, Vec<crate::OrderItem>)> for AccountOrder {
    fn from(
        (
            crate::AccountOrder {
                id,
                buyer_id,
                status,
                order_id,
                order_ext_id: _,
                service_order_id: _,
                checkout_notes,
            },
            mut items,
        ): (crate::AccountOrder, Vec<crate::OrderItem>),
    ) -> Self {
        AccountOrder {
            id,
            buyer_id,
            status,
            order_id,
            items: items.drain_filter(|item| item.order_id == id).collect(),
            checkout_notes,
        }
    }
}

#[cfg_attr(feature = "dummy", derive(fake::Dummy))]
#[derive(Serialize, Deserialize, Debug)]
pub struct AccountOrder {
    pub id: crate::AccountOrderId,
    pub buyer_id: crate::AccountId,
    pub status: crate::OrderStatus,
    pub order_id: Option<crate::OrderId>,
    pub items: Vec<crate::OrderItem>,
    pub checkout_notes: Option<String>,
}

#[cfg_attr(feature = "dummy", derive(fake::Dummy))]
#[derive(Serialize, Deserialize, Debug)]
pub struct ShoppingCartItem {
    pub id: ShoppingCartItemId,
    pub product_id: ProductId,
    pub shopping_cart_id: ShoppingCartId,
    pub quantity: Quantity,
    pub quantity_unit: QuantityUnit,
}

impl From<crate::ShoppingCartItem> for ShoppingCartItem {
    fn from(
        crate::ShoppingCartItem {
            id,
            product_id,
            shopping_cart_id,
            quantity,
            quantity_unit,
        }: crate::ShoppingCartItem,
    ) -> Self {
        Self {
            id,
            product_id,
            shopping_cart_id,
            quantity,
            quantity_unit,
        }
    }
}

#[cfg_attr(feature = "dummy", derive(fake::Dummy))]
#[derive(Serialize, Deserialize, Debug)]
pub struct ShoppingCart {
    pub id: ShoppingCartId,
    pub buyer_id: AccountId,
    pub payment_method: PaymentMethod,
    pub state: ShoppingCartState,
    pub items: Vec<ShoppingCartItem>,
    pub checkout_notes: String,
}

impl From<(crate::ShoppingCart, Vec<crate::ShoppingCartItem>)> for ShoppingCart {
    fn from(
        (
            crate::ShoppingCart {
                id,
                buyer_id,
                payment_method,
                state,
                checkout_notes,
            },
            items,
        ): (crate::ShoppingCart, Vec<crate::ShoppingCartItem>),
    ) -> Self {
        Self {
            id,
            buyer_id,
            payment_method,
            state,
            checkout_notes: checkout_notes.unwrap_or_default(),
            items: items
                .into_iter()
                .map(
                    |crate::ShoppingCartItem {
                         id,
                         product_id,
                         shopping_cart_id,
                         quantity,
                         quantity_unit,
                     }| ShoppingCartItem {
                        id,
                        product_id,
                        shopping_cart_id,
                        quantity,
                        quantity_unit,
                    },
                )
                .collect(),
        }
    }
}

#[cfg_attr(feature = "dummy", derive(fake::Dummy))]
#[derive(Serialize, Deserialize, Debug, Hash)]
pub struct Photo {
    pub id: crate::PhotoId,
    pub file_name: crate::FileName,
    pub url: String,
    pub unique_name: crate::UniqueName,
}

#[cfg_attr(feature = "dummy", derive(fake::Dummy))]
#[derive(Clone, Debug, Hash, PartialOrd, PartialEq, Eq, Deserialize, Serialize)]
#[serde(rename_all = "snake_case")]
pub struct Category {
    pub name: String,
    pub key: String,
    pub svg: String,
}

impl From<&crate::Category> for Category {
    fn from(crate::Category { name, key, svg }: &crate::Category) -> Self {
        Self {
            name: (*name).into(),
            key: (*key).into(),
            svg: (*svg).into(),
        }
    }
}

#[cfg_attr(feature = "dummy", derive(fake::Dummy))]
#[derive(Serialize, Deserialize, Debug, Hash)]
pub struct Product {
    pub id: crate::ProductId,
    pub name: crate::ProductName,
    pub short_description: crate::ProductShortDesc,
    pub long_description: crate::ProductLongDesc,
    pub category: Option<Category>,
    pub price: crate::Price,
    pub available: bool,
    pub quantity_unit: crate::QuantityUnit,
    pub deliver_days_flag: crate::Days,
    pub photos: Vec<Photo>,
}

impl<'path>
    From<(
        crate::Product,
        &mut Vec<ProductLinkedPhoto>,
        &mut Vec<crate::Stock>,
        &'path str,
    )> for Product
{
    fn from(
        (
            crate::Product {
                id,
                name,
                short_description,
                long_description,
                category,
                price,
                deliver_days_flag,
            },
            photos,
            product_stocks,
            public_path,
        ): (
            crate::Product,
            &mut Vec<ProductLinkedPhoto>,
            &mut Vec<crate::Stock>,
            &'path str,
        ),
    ) -> Self {
        let pos = product_stocks
            .iter()
            .position(|stock| stock.product_id == id);
        let (available, quantity_unit) = pos
            .map(|idx| product_stocks.remove(idx))
            .map(|stock| (**stock.quantity > 0, stock.quantity_unit))
            .unwrap_or_else(|| (false, crate::QuantityUnit::Piece));
        Self {
            id,
            name,
            short_description,
            long_description,
            category: category.and_then(|name| {
                crate::CATEGORIES.iter().find_map(|c| {
                    if c.name == name.as_str() {
                        Some(Category::from(c))
                    } else {
                        None
                    }
                })
            }),
            price,
            available,
            quantity_unit,
            deliver_days_flag,
            photos: photos
                .drain_filter(|photo| photo.product_id == id)
                .map(
                    |ProductLinkedPhoto {
                         id,
                         local_path: _,
                         file_name,
                         product_id: _,
                         unique_name,
                     }| Photo {
                        id,
                        url: format!("{}/{}", public_path, unique_name.as_str()),
                        unique_name,
                        file_name,
                    },
                )
                .collect(),
        }
    }
}

#[cfg_attr(feature = "dummy", derive(fake::Dummy))]
#[derive(Serialize, Deserialize, Debug, Deref)]
#[serde(transparent)]
pub struct Products(pub Vec<Product>);

impl
    From<(
        Vec<crate::Product>,
        Vec<ProductLinkedPhoto>,
        Vec<crate::Stock>,
        String,
    )> for Products
{
    fn from(
        (products, mut photos, mut products_stock, public_path): (
            Vec<crate::Product>,
            Vec<ProductLinkedPhoto>,
            Vec<crate::Stock>,
            String,
        ),
    ) -> Self {
        Self(
            products
                .into_iter()
                .map(|p| (p, &mut photos, &mut products_stock, public_path.as_str()).into())
                .collect(),
        )
    }
}

#[derive(Serialize, Deserialize, Debug)]
pub struct SignInInput {
    pub login: Login,
    pub password: Password,
}

#[derive(Serialize, Deserialize, Debug)]
pub struct SessionOutput {
    pub access_token: AccessTokenString,
    pub refresh_token: RefreshTokenString,
    pub exp: NaiveDateTime,
    pub role: Role,
}

#[derive(Serialize, Deserialize, Debug)]
pub struct CreateAccountInput {
    pub email: Email,
    pub login: Login,
    pub password: Password,
    pub password_confirmation: PasswordConfirmation,
}

#[derive(Serialize, Deserialize, Debug)]
pub struct CreateOrderInput {
    /// Required customer e-mail
    pub email: String,
    /// Required customer phone number
    pub phone: String,
    /// Required customer first name
    pub first_name: String,
    /// Required customer last name
    pub last_name: String,
    /// Required customer language
    pub language: String,
    /// False if customer is allowed to be charged on site.
    /// Otherwise it should be true to use payment service for charging
    pub charge_client: bool,
    /// User currency
    pub currency: String,
}

#[derive(Serialize, Deserialize, Debug)]
pub struct DeleteItemInput {
    pub shopping_cart_item_id: ShoppingCartItemId,
}

#[derive(Serialize, Deserialize, Debug)]
pub struct DeleteItemOutput {
    pub success: bool,
}

#[derive(Serialize, Deserialize, Debug)]
pub struct UpdateItemInput {
    pub product_id: ProductId,
    pub quantity: Quantity,
    pub quantity_unit: QuantityUnit,
}

#[derive(Serialize, Deserialize, Debug)]
pub struct UpdateItemOutput {
    pub shopping_cart_item: ShoppingCartItem,
}

#[derive(Serialize, Deserialize, Debug)]
pub struct UpdateCartInput {
    pub items: Vec<UpdateItemInput>,
}

#[derive(Serialize, Deserialize, Debug)]
pub struct UpdateCartOutput {
    pub items: Vec<ShoppingCartItem>,
}

#[derive(Serialize, Deserialize, Debug)]
pub struct SearchRequest {
    /// Match string
    pub q: String,
    pub lang: String,
}

pub mod admin {
    use serde::{Deserialize, Serialize};

    use crate::*;

    #[derive(Deserialize, Serialize, Debug)]
    pub struct RegisterInput {
        pub login: Login,
        pub email: Email,
        pub password: Password,
        pub password_confirmation: PasswordConfirmation,
        pub role: Role,
    }

    #[derive(Serialize, Deserialize, Debug, Default)]
    pub struct RegisterResponse {
        pub errors: Vec<RegisterError>,
        pub account: Option<Account>,
    }

    #[derive(Serialize, Deserialize, Debug)]
    pub enum RegisterError {
        PasswordDiffer,
    }

    #[derive(Serialize, Deserialize, Debug)]
    pub struct SignInInput {
        pub login: Option<Login>,
        pub email: Option<Email>,
        pub password: Password,
    }

    #[derive(Serialize, Deserialize, Debug)]
    pub struct LogoutResponse {}
}