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//! # Support for `TypedMultipart<T>` and `BaseMultipart<T, R>` from `axum_typed_multipart`
//!
//! ## Feature
//!
//! Enable the `typed_multipart` feature to use `Valid<TypedMultipart<T>>` and `Valid<BaseMultipart<T, R>>`.
//!
//! ## Usage
//!
//! 1. Implement `TryFromMultipart` and `Validate` for your data type `T`.
//! 2. In your handler function, use `Valid<TypedMultipart<T>>` or `Valid<BaseMultipart<T, E>` as some parameter's type.
//!
//! ## Example
//!
//! ```no_run
//! use axum::routing::post;
//! use axum::Router;
//! use axum_typed_multipart::{BaseMultipart, TryFromMultipart, TypedMultipart, TypedMultipartError};
//! use axum_valid::Valid;
//! use validator::Validate;
//!
//! #[tokio::main]
//! async fn main() -> anyhow::Result<()> {
//!     let router = Router::new()
//!         .route("/typed_multipart", post(handler))
//!         .route("/base_multipart", post(base_handler));
//!     axum::Server::bind(&([0u8, 0, 0, 0], 8080).into())
//!         .serve(router.into_make_service())
//!         .await?;
//!     Ok(())
//! }
//!
//! async fn handler(Valid(TypedMultipart(parameter)): Valid<TypedMultipart<Parameter>>) {
//!     assert!(parameter.validate().is_ok());
//! }
//!
//! async fn base_handler(
//!     Valid(BaseMultipart {
//!         data: parameter, ..
//!     }): Valid<BaseMultipart<Parameter, TypedMultipartError>>,
//! ) {
//!     assert!(parameter.validate().is_ok());
//! }
//!
//! #[derive(TryFromMultipart, Validate)]
//! struct Parameter {
//!     #[validate(range(min = 5, max = 10))]
//!     v0: i32,
//!     #[validate(length(min = 1, max = 10))]
//!     v1: String,
//! }
//! ```

use crate::{HasValidate, HasValidateArgs};
use axum_typed_multipart::{BaseMultipart, TypedMultipart};
use validator::{Validate, ValidateArgs};

impl<T: Validate, R> HasValidate for BaseMultipart<T, R> {
    type Validate = T;
    fn get_validate(&self) -> &T {
        &self.data
    }
}

impl<'v, T: ValidateArgs<'v>, R> HasValidateArgs<'v> for BaseMultipart<T, R> {
    type ValidateArgs = T;
    fn get_validate_args(&self) -> &Self::ValidateArgs {
        &self.data
    }
}

impl<T: Validate> HasValidate for TypedMultipart<T> {
    type Validate = T;
    fn get_validate(&self) -> &T {
        &self.0
    }
}

impl<'v, T: ValidateArgs<'v>> HasValidateArgs<'v> for TypedMultipart<T> {
    type ValidateArgs = T;
    fn get_validate_args(&self) -> &Self::ValidateArgs {
        &self.0
    }
}

#[cfg(test)]
mod tests {
    use crate::tests::{ValidTest, ValidTestParameter};
    use axum::http::StatusCode;
    use axum_typed_multipart::{BaseMultipart, TypedMultipart};
    use reqwest::multipart::Form;
    use reqwest::RequestBuilder;

    impl<T: ValidTestParameter, R> ValidTest for BaseMultipart<T, R>
    where
        Form: From<&'static T>,
    {
        const ERROR_STATUS_CODE: StatusCode = StatusCode::BAD_REQUEST;

        fn set_valid_request(builder: RequestBuilder) -> RequestBuilder {
            builder.multipart(Form::from(T::valid()))
        }

        fn set_error_request(builder: RequestBuilder) -> RequestBuilder {
            builder.multipart(Form::new())
        }

        fn set_invalid_request(builder: RequestBuilder) -> RequestBuilder {
            builder.multipart(Form::from(T::invalid()))
        }
    }

    impl<T: ValidTestParameter> ValidTest for TypedMultipart<T>
    where
        Form: From<&'static T>,
    {
        const ERROR_STATUS_CODE: StatusCode = StatusCode::BAD_REQUEST;

        fn set_valid_request(builder: RequestBuilder) -> RequestBuilder {
            builder.multipart(Form::from(T::valid()))
        }

        fn set_error_request(builder: RequestBuilder) -> RequestBuilder {
            builder.multipart(Form::new())
        }

        fn set_invalid_request(builder: RequestBuilder) -> RequestBuilder {
            builder.multipart(Form::from(T::invalid()))
        }
    }
}