use chrono::NaiveDateTime;
use derive_more::Deref;
use serde::{Deserialize, Serialize};

use crate::v2::{CategoryId, CategoryKey, CategoryName, CategorySvg, DetailedProduct};
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>,
}

#[derive(Serialize, Deserialize, Debug)]
pub struct Account {
    pub id: AccountId,
    pub email: Email,
    pub login: Login,
    pub role: Role,
    pub customer_id: uuid::Uuid,
    pub state: AccountState,
    pub addresses: Vec<AccountAddress>,
}

impl From<(FullAccount, Vec<crate::AccountAddress>)> for Account {
    fn from(
        (
            FullAccount {
                id,
                email,
                login,
                pass_hash: _,
                role,
                customer_id,
                state,
            },
            addresses,
        ): (FullAccount, Vec<crate::AccountAddress>),
    ) -> Self {
        Self {
            id,
            email,
            login,
            role,
            customer_id,
            state,
            addresses: addresses.into_iter().map(From::from).collect(),
        }
    }
}

#[derive(Serialize, Deserialize, Debug)]
pub struct AccountAddress {
    pub id: AddressId,
    pub name: Name,
    pub email: Email,
    pub phone: Phone,
    pub street: Street,
    pub city: City,
    pub country: Country,
    pub zip: Zip,
    pub account_id: AccountId,
    pub is_default: bool,
}

impl From<crate::AccountAddress> for AccountAddress {
    fn from(
        crate::AccountAddress {
            id,
            name,
            email,
            phone,
            street,
            city,
            country,
            zip,
            account_id,
            is_default,
        }: crate::AccountAddress,
    ) -> Self {
        Self {
            id,
            name,
            email,
            phone,
            street,
            city,
            country,
            zip,
            account_id,
            is_default,
        }
    }
}

#[derive(Serialize, Deserialize, Debug)]
#[serde(transparent)]
pub struct Orders(pub Vec<Order>);

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

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

#[derive(Serialize, Deserialize, Debug)]
pub struct Order {
    pub id: crate::OrderId,
    pub buyer_id: Option<crate::AccountId>,
    pub status: crate::OrderStatus,
    pub items: Vec<crate::OrderItem>,
    pub checkout_notes: Option<String>,
    pub address_id: OrderAddressId,
}

#[derive(Serialize, Deserialize, Debug)]
pub struct ShoppingCartItem {
    pub id: ShoppingCartItemId,
    pub product_variant_id: ProductVariantId,
    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_variant_id,
            product_id,
            shopping_cart_id,
            quantity,
            quantity_unit,
        }: crate::ShoppingCartItem,
    ) -> Self {
        Self {
            id,
            product_variant_id,
            product_id,
            shopping_cart_id,
            quantity,
            quantity_unit,
        }
    }
}

#[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_variant_id,
                         product_id,
                         shopping_cart_id,
                         quantity,
                         quantity_unit,
                     }| ShoppingCartItem {
                        id,
                        product_id,
                        product_variant_id,
                        shopping_cart_id,
                        quantity,
                        quantity_unit,
                    },
                )
                .collect(),
        }
    }
}

#[derive(Debug, Hash, PartialEq, Serialize, Deserialize)]
pub struct Photo {
    pub id: PhotoId,
    pub file_name: FileName,
    pub url: String,
    pub unique_name: UniqueName,
}

#[derive(Clone, Debug, Hash, PartialOrd, PartialEq, Eq, Deserialize, Serialize)]
#[serde(rename_all = "snake_case")]
pub struct Category {
    pub id: CategoryId,
    pub parent_id: Option<CategoryId>,
    pub name: CategoryName,
    pub key: CategoryKey,
    pub svg: CategorySvg,
}

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

impl<'path>
    From<(
        crate::Product,
        &mut Vec<ProductLinkedPhoto>,
        &mut Vec<Stock>,
        &[crate::v2::Category],
        &'path str,
    )> for Product
{
    fn from(
        (
            crate::Product {
                id,
                name,
                short_description,
                long_description,
                category,
                price,
                deliver_days_flag,
            },
            photos,
            product_stocks,
            categories,
            public_path,
        ): (
            crate::Product,
            &mut Vec<ProductLinkedPhoto>,
            &mut Vec<Stock>,
            &[crate::v2::Category],
            &'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, QuantityUnit::Piece));

        Self {
            id,
            name,
            short_description,
            long_description,
            category: category
                .and_then(|category| CategoryMapper::db_into_api(category, categories)),
            price,
            available,
            quantity_unit,
            deliver_days_flag,
            photos: photos
                .drain_filter(|photo| photo.product_id == id)
                .map(
                    |ProductLinkedPhoto {
                         photo_id: id,
                         local_path: _,
                         file_name,
                         product_id: _,
                         unique_name,
                     }| Photo {
                        id,
                        url: format!("{}/{}", public_path, unique_name.as_str()),
                        unique_name,
                        file_name,
                    },
                )
                .collect(),
        }
    }
}

#[derive(Serialize, Deserialize, Debug, Deref)]
#[serde(transparent)]
pub struct Products(pub Vec<DetailedProduct>);

// impl
//     From<(
//         Vec<DetailedProduct>,
//         Vec<ProductLinkedPhoto>,
//         Vec<Stock>,
//         String,
//     )> for Products
// {
//     fn from(
//         (products, mut photos, mut products_stock, public_path): (
//             Vec<DetailedProduct>,
//             Vec<ProductLinkedPhoto>,
//             Vec<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,
}

#[derive(Serialize, Deserialize, Debug)]
pub enum OrderAddressInput {
    Address(CreateOrderAddress),
    AccountAddress(AddressId),
    DefaultAccountAddress,
}

#[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,
    /// User currency
    pub currency: String,
    pub address: OrderAddressInput,
    pub payment_method: PaymentMethod,
}

#[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_variant_id: ProductVariantId,
    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>,
    pub notes: String,
    pub payment_method: Option<PaymentMethod>,
}

#[derive(Serialize, Deserialize, Debug)]
pub struct UpdateCartOutput {
    pub cart_id: ShoppingCartId,
    pub items: Vec<ShoppingCartItem>,
    pub checkout_notes: String,
    pub payment_method: PaymentMethod,
}

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

#[derive(Serialize, Deserialize, Debug)]
pub struct CreateOrderAddress {
    pub name: Name,
    pub email: Email,
    pub phone: Phone,
    pub street: Street,
    pub city: City,
    pub country: Country,
    pub zip: Zip,
}

#[derive(Serialize, Deserialize, Debug)]
pub struct UpdateOrderAddress {
    pub id: OrderAddressId,
    pub name: Name,
    pub email: Email,
    pub street: Street,
    pub city: City,
    pub country: Country,
    pub zip: Zip,
}

#[derive(Serialize, Deserialize, Debug)]
pub struct PlaceOrderResult {
    pub redirect_uri: String,
    pub order_id: OrderId,
}

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<super::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 {}
}

pub mod v2 {
    use crate::api::{Category, Photo};

    #[derive(Debug, Hash, serde::Serialize, serde::Deserialize)]
    pub struct ProductVariant {
        pub id: crate::ProductVariantId,
        pub product_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>,
    }
}