//! Builder for uploading images to the upload session.
//!
//! <https://api.mangadex.org/swagger.html#/Upload/put-upload-session-file>
//!
//! Currently, there is a maximum of 10 files per request.
//!
//! ```rust
//! use uuid::Uuid;
//!
//! use mangadex_api::MangaDexClient;
//! use mangadex_api::types::{Password, Username};
//!
//! # async fn run() -> anyhow::Result<()> {
//! let client = MangaDexClient::default();
//!
//! let _login_res = client
//!     .auth()
//!     .login()
//!     .username(Username::parse("myusername")?)
//!     .password(Password::parse("hunter23")?)
//!     .build()?
//!     .send()
//!     .await?;
//!
//! let session_id = Uuid::new_v4();
//! let file1_bytes = vec![0];
//! let file2_bytes = vec![1];
//! let res = client
//!     .upload()
//!     .upload_images()
//!     .session_id(&session_id)
//!     .add_file(file1_bytes.into())
//!     .add_file(file2_bytes.into())
//!     .build()?
//!     .send()
//!     .await?;
//!
//! println!("upload images: {:?}", res);
//! # Ok(())
//! # }
//! ```

use std::borrow::Cow;

use derive_builder::Builder;
use mangadex_api_schema::v5::UploadSessionFileResponse;
use mangadex_api_schema::Endpoint;
use reqwest::multipart::{Form, Part};
use serde::Serialize;
use uuid::Uuid;

use crate::HttpClientRef;

/// Upload images to the upload session.
///
/// This requires authentication.
///
/// Makes a request to `POST /upload/{id}`.
#[derive(Debug, Builder, Serialize, Clone)]
#[serde(rename_all = "camelCase")]
#[builder(setter(into, strip_option), pattern = "owned")]
pub struct UploadImages<'a> {
    /// This should never be set manually as this is only for internal use.
    #[doc(hidden)]
    #[serde(skip)]
    #[builder(pattern = "immutable")]
    pub(crate) http_client: HttpClientRef,

    #[serde(skip)]
    pub session_id: &'a Uuid,

    /// Image bytes.
    #[builder(setter(each = "add_file"))]
    pub files: Vec<Cow<'static, [u8]>>,
}

// TODO: Come up with a way to generalize multipart form data for the `Endpoint` trait.
impl Endpoint for UploadImages<'_> {
    type Query = ();
    type Body = ();
    type Response = UploadSessionFileResponse;

    fn path(&self) -> Cow<str> {
        Cow::Owned(format!("/upload/{}", self.session_id))
    }

    fn method(&self) -> reqwest::Method {
        reqwest::Method::POST
    }

    fn require_auth(&self) -> bool {
        true
    }

    fn multipart(&self) -> Option<Form> {
        let mut form = Form::new();

        for file in &self.files {
            let part = Part::bytes(file.clone());
            form = form.part("file", part);
        }

        Some(form)
    }
}

impl UploadImages<'_> {
    pub async fn send(&self) -> UploadSessionFileResponse {
        #[cfg(not(feature = "multi-thread"))]
        let res = self.http_client.borrow().send_request(self).await?;
        #[cfg(feature = "multi-thread")]
        let res = self.http_client.lock().await.send_request(self).await?;

        res
    }
}

#[cfg(test)]
mod tests {
    use fake::faker::filesystem::en::MimeType;
    use fake::Fake;
    use serde_json::json;
    use url::Url;
    use uuid::Uuid;
    use wiremock::matchers::{header, header_exists, method, path_regex};
    use wiremock::{Mock, MockServer, ResponseTemplate};

    use crate::v5::AuthTokens;
    use crate::{HttpClient, MangaDexClient};

    #[tokio::test]
    async fn upload_images_fires_a_request_to_base_url() -> anyhow::Result<()> {
        let mock_server = MockServer::start().await;
        let http_client: HttpClient = HttpClient::builder()
            .base_url(Url::parse(&mock_server.uri())?)
            .auth_tokens(AuthTokens {
                session: "sessiontoken".to_string(),
                refresh: "refreshtoken".to_string(),
            })
            .build()?;
        let mangadex_client = MangaDexClient::new_with_http_client(http_client);

        let file_bytes = vec![0_u8];
        let session_id = Uuid::new_v4();
        let mime_type: String = MimeType().fake();
        let response_body = json!({
            "result": "ok",
            "errors": [],
            "data": [
                {
                    "id": session_id,
                    "type": "upload_session_file",
                    "attributes": {
                        "originalFileName": "p01.jpg",
                        "fileHash": "e199c7d73af7a58e8a4d0263f03db660",
                        "fileSize": 0,
                        "mimeType": mime_type,
                        "source": "local",
                        "version": 1,
                    },
                    "relationships": []
                }
            ],
        });

        Mock::given(method("POST"))
            .and(path_regex("/upload/[0-9a-fA-F-]+"))
            .and(header("Authorization", "Bearer sessiontoken"))
            // The "multipart/form-data; boundary=[boundary]" Content-Type value is dynamic and can't easily be validated.
            .and(header_exists("Content-Type"))
            .respond_with(ResponseTemplate::new(201).set_body_json(response_body))
            .expect(1)
            .mount(&mock_server)
            .await;

        let _ = mangadex_client
            .upload()
            .upload_images()
            .session_id(&session_id)
            .add_file(file_bytes.into())
            .build()?
            .send()
            .await?;

        Ok(())
    }
}