use tide::{Request, Response};

mod database;
mod frontend;
mod indieauth;
mod micropub;

use crate::indieauth::IndieAuthMiddleware;

#[derive(Clone)]
pub struct ApplicationState<StorageBackend>
where
    StorageBackend: database::Storage + Send + Sync + 'static,
{
    token_endpoint: surf::Url,
    authorization_endpoint: surf::Url,
    media_endpoint: Option<String>,
    http_client: surf::Client,
    storage: StorageBackend,
}

type App<Storage> = tide::Server<ApplicationState<Storage>>;

static MICROPUB_CLIENT: &[u8] = include_bytes!("./index.html");

fn equip_app<Storage>(mut app: App<Storage>) -> App<Storage>
where
    Storage: database::Storage + Send + Sync + Clone,
{
    app.at("/micropub")
        .with(IndieAuthMiddleware::new())
        .get(micropub::get_handler)
        .post(micropub::post_handler);
    // The Micropub client. It'll start small, but could grow into something full-featured!
    app.at("/micropub/client").get(|_: Request<_>| async move {
        Ok(Response::builder(200)
            .body(MICROPUB_CLIENT)
            .content_type("text/html")
            .build())
    });
    app.at("/")
        .with(frontend::ErrorHandlerMiddleware {})
        .get(frontend::mainpage)
        .post(frontend::onboarding_receiver);
    app.at("/static/*path")
        .with(frontend::ErrorHandlerMiddleware {})
        .get(frontend::handle_static);
    app.at("/*path")
        .with(frontend::ErrorHandlerMiddleware {})
        .get(frontend::render_post);
    app.at("/coffee")
        .with(frontend::ErrorHandlerMiddleware {})
        .get(frontend::coffee);
    app.at("/health").get(|_| async { Ok("OK") });

    app
}

pub async fn get_app_with_redis(
    token_endpoint: surf::Url,
    authorization_endpoint: surf::Url,
    redis_uri: String,
    media_endpoint: Option<String>,
) -> App<database::RedisStorage> {
    let app = tide::with_state(ApplicationState {
        token_endpoint,
        media_endpoint,
        authorization_endpoint,
        storage: database::RedisStorage::new(redis_uri).await.unwrap(),
        http_client: surf::Client::new(),
    });

    equip_app(app)
}

#[cfg(test)]
pub async fn get_app_with_test_redis(
    token_endpoint: surf::Url,
) -> (
    database::RedisInstance,
    database::RedisStorage,
    App<database::RedisStorage>,
) {
    use surf::Url;

    let redis_instance = database::get_redis_instance().await;
    let backend = database::RedisStorage::new(redis_instance.uri().to_string())
        .await
        .unwrap();
    let app = tide::with_state(ApplicationState {
        token_endpoint,
        media_endpoint: None,
        authorization_endpoint: Url::parse("https://indieauth.com/auth").unwrap(),
        storage: backend.clone(),
        http_client: surf::Client::new(),
    });
    return (redis_instance, backend, equip_app(app));
}

#[cfg(test)]
#[allow(unused_variables)]
mod tests {
    use super::*;
    use database::Storage;
    use mockito::mock;
    use serde_json::json;
    use tide_testing::TideTestingExt;

    // Helpers
    async fn create_app() -> (
        database::RedisStorage,
        App<database::RedisStorage>,
        database::RedisInstance,
    ) {
        //get_app_with_memory_for_testing(surf::Url::parse(&*mockito::server_url()).unwrap()).await
        let (r, b, a) =
            get_app_with_test_redis(surf::Url::parse(&*mockito::server_url()).unwrap()).await;
        (b, a, r)
    }

    async fn post_json(
        app: &App<database::RedisStorage>,
        json: serde_json::Value,
    ) -> surf::Response {
        let request = app
            .post("/micropub")
            .header("Authorization", "Bearer test")
            .header("Content-Type", "application/json")
            .body(json);
        return request.send().await.unwrap();
    }

    #[async_std::test]
    async fn test_no_posting_to_others_websites() {
        let _m = mock("GET", "/")
            .with_status(200)
            .with_header("Content-Type", "application/json")
            .with_body(r#"{"me": "https://fireburn.ru", "client_id": "https://quill.p3k.io/", "scope": "create update media"}"#)
            .create();

        let (db, app, _r) = create_app().await;

        let response = post_json(
            &app,
            json!({
                "type": ["h-entry"],
                "properties": {
                    "content": ["Fake news about Aaron Parecki!"],
                    "uid": ["https://aaronparecki.com/posts/fake-news"]
                }
            }),
        )
        .await;
        assert_eq!(response.status(), 403);

        let response = post_json(
            &app,
            json!({
                "type": ["h-entry"],
                "properties": {
                    "content": ["More fake news about Aaron Parecki!"],
                    "url": ["https://aaronparecki.com/posts/more-fake-news"]
                }
            }),
        )
        .await;
        assert_eq!(response.status(), 403);

        let response = post_json(&app, json!({
            "type": ["h-entry"],
            "properties": {
                "content": ["Sneaky advertisement designed to creep into someone else's feed! Buy whatever I'm promoting!"],
                "channel": ["https://aaronparecki.com/feeds/main"]
            }
        })).await;
        assert_eq!(response.status(), 403);
    }

    #[async_std::test]
    async fn test_successful_authorization() {
        let _m = mock("GET", "/")
            .with_status(200)
            .with_header("Content-Type", "application/json")
            .with_body(r#"{"me": "https://fireburn.ru", "client_id": "https://quill.p3k.io/", "scope": "create update media"}"#)
            .create();

        let (db, app, _r) = create_app().await;

        let response: serde_json::Value = app
            .get("/micropub?q=config")
            .header("Authorization", "test")
            .recv_json()
            .await
            .unwrap();
        assert!(!response["q"].as_array().unwrap().is_empty());
    }

    #[async_std::test]
    async fn test_unsuccessful_authorization() {
        let _m = mock("GET", "/")
            .with_status(400)
            .with_header("Content-Type", "application/json")
            .with_body(r#"{"error":"unauthorized","error_description":"A valid access token is required."}"#)
            .create();

        let (db, app, _r) = create_app().await;

        let response: surf::Response = app
            .get("/micropub?q=config")
            .header("Authorization", "test")
            .send()
            .await
            .unwrap();
        assert_eq!(response.status(), 401);
    }

    #[async_std::test]
    async fn test_no_auth_header() {
        let (db, app, _r) = create_app().await;

        let request: surf::RequestBuilder = app.get("/micropub?q=config");
        let response: surf::Response = request.send().await.unwrap();
        assert_eq!(response.status(), 401);
    }

    #[async_std::test]
    async fn test_create_post_form_encoded() {
        let _m = mock("GET", "/")
            .with_status(200)
            .with_header("Content-Type", "application/json")
            .with_body(r#"{"me": "https://fireburn.ru", "client_id": "https://quill.p3k.io/", "scope": "create update media"}"#)
            .create();

        let (storage, app, _r) = create_app().await;

        let request: surf::RequestBuilder = app
            .post("/micropub")
            .header("Authorization", "Bearer test")
            .header("Content-Type", "application/x-www-form-urlencoded")
            .body("h=entry&content=something%20interesting&category[]=test&category[]=stuff");
        let mut response: surf::Response = request.send().await.unwrap();
        println!(
            "{:#}",
            response.body_json::<serde_json::Value>().await.unwrap()
        );
        assert!(response.status() == 201 || response.status() == 202);
        let uid = response.header("Location").unwrap().last().to_string();
        // Assume the post is in the database at this point.
        let post = storage.get_post(&uid).await.unwrap().unwrap();
        assert_eq!(
            post["properties"]["content"][0]["html"]
                .as_str()
                .unwrap()
                .trim(),
            "<p>something interesting</p>"
        );
    }

    #[async_std::test]
    async fn test_create_post_json() {
        let _m = mock("GET", "/")
            .with_status(200)
            .with_header("Content-Type", "application/json")
            .with_body(r#"{"me": "https://fireburn.ru", "client_id": "https://quill.p3k.io/", "scope": "create update media"}"#)
            .create();

        let (storage, app, _r) = create_app().await;

        let mut response = post_json(
            &app,
            json!({
                "type": ["h-entry"],
                "properties": {
                    "content": ["This is content!"]
                }
            }),
        )
        .await;
        println!(
            "{:#}",
            response.body_json::<serde_json::Value>().await.unwrap()
        );
        assert!(response.status() == 201 || response.status() == 202);
        let uid = response.header("Location").unwrap().last().to_string();
        // Assume the post is in the database at this point.
        let post = storage.get_post(&uid).await.unwrap().unwrap();
        assert_eq!(
            post["properties"]["content"][0]["html"]
                .as_str()
                .unwrap()
                .trim(),
            "<p>This is content!</p>"
        );
        let feed = storage
            .get_post("https://fireburn.ru/feeds/main")
            .await
            .unwrap()
            .unwrap();
        assert_eq!(feed["children"].as_array().unwrap().len(), 1);
        assert_eq!(feed["children"][0].as_str().unwrap(), uid);
        let first_uid = uid;
        // Test creation of a second post
        let mut response = post_json(
            &app,
            json!({
                "type": ["h-entry"],
                "properties": {
                    "content": ["#moar content for you!"]
                }
            }),
        )
        .await;
        println!(
            "{:#}",
            response.body_json::<serde_json::Value>().await.unwrap()
        );
        assert!(response.status() == 201 || response.status() == 202);
        let uid = response.header("Location").unwrap().last().to_string();
        // Assume the post is in the database at this point.
        //println!("Keys in database: {:?}", storage.mapping.read().await.keys());
        let new_feed = storage
            .get_post("https://fireburn.ru/feeds/main")
            .await
            .unwrap()
            .unwrap();
        println!("{}", new_feed["children"]);
        assert_eq!(new_feed["children"].as_array().unwrap().len(), 2);
        assert_eq!(new_feed["children"][0].as_str().unwrap(), uid);
        assert_eq!(new_feed["children"][1].as_str().unwrap(), first_uid);
    }
}