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    /*
    * Copyright (C) 2021  Aravinth Manivannan <realaravinth@batsense.net>
    *
    * This program is free software: you can redistribute it and/or modify
    * it under the terms of the GNU Affero General Public License as
    * published by the Free Software Foundation, either version 3 of the
    * License, or (at your option) any later version.
    *
    * This program is distributed in the hope that it will be useful,
    * but WITHOUT ANY WARRANTY; without even the implied warranty of
    * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    * GNU Affero General Public License for more details.
    *
    * You should have received a copy of the GNU Affero General Public License
    * along with this program.  If not, see <https://www.gnu.org/licenses/>.
    */
    use std::borrow::Cow;

    use actix_identity::Identity;
    use actix_web::{post, web, HttpResponse, Responder};
    use serde::{Deserialize, Serialize};

    use super::{get_random, is_authenticated};
    use crate::errors::*;
    use crate::Data;

    #[derive(Clone, Debug, Deserialize, Serialize)]
    pub struct MCaptchaID {
        pub name: Option<String>,
    }

    #[derive(Clone, Debug, Deserialize, Serialize)]
    pub struct MCaptchaDetails {
        pub name: Option<String>,
        pub key: String,
    }

    #[post("/api/v1/mcaptcha/add")]
    pub async fn add_mcaptcha(data: web::Data<Data>, id: Identity) -> ServiceResult<impl Responder> {
        is_authenticated(&id)?;
        let username = id.identity().unwrap();
        let mut key;

        let resp;

        loop {
            key = get_random(32);

            let res = sqlx::query!(
                "INSERT INTO mcaptcha_config
            (key, user_id)
            VALUES ($1, (SELECT ID FROM mcaptcha_users WHERE name = $2))",
                &key,
                &username,
            )
            .execute(&data.db)
            .await;

            match res {
                Err(sqlx::Error::Database(err)) => {
                    if err.code() == Some(Cow::from("23505"))
                        && err.message().contains("mcaptcha_config_key_key")
                    {
                        continue;
                    } else {
                        Err(sqlx::Error::Database(err))?;
                    }
                }
                Err(e) => Err(e)?,

                Ok(_) => {
                    resp = MCaptchaDetails { key, name: None };
                    break;
                }
            }
        }

        Ok(HttpResponse::Ok().json(resp))
    }

    #[post("/api/v1/mcaptcha/update/key")]
    pub async fn update_token(
        payload: web::Json<MCaptchaDetails>,
        data: web::Data<Data>,
        id: Identity,
    ) -> ServiceResult<impl Responder> {
        use std::borrow::Cow;

        is_authenticated(&id)?;
        let username = id.identity().unwrap();
        let mut key;

        loop {
            key = get_random(32);
            let res = update_token_helper(&key, &payload.key, &username, &data).await;
            if res.is_ok() {
                break;
            } else {
                if let Err(sqlx::Error::Database(err)) = res {
                    if err.code() == Some(Cow::from("23505")) {
                        continue;
                    } else {
                        Err(sqlx::Error::Database(err))?;
                    }
                };
            }
        }

        let resp = MCaptchaDetails {
            key,
            name: payload.into_inner().name,
        };

        Ok(HttpResponse::Ok().json(resp))
    }

    async fn update_token_helper(
        key: &str,
        old_key: &str,
        username: &str,
        data: &Data,
    ) -> Result<(), sqlx::Error> {
        sqlx::query!(
            "UPDATE mcaptcha_config SET key = $1
            WHERE key = $2 AND user_id = (SELECT ID FROM mcaptcha_users WHERE name = $3)",
            &key,
            &old_key,
            &username,
        )
        .execute(&data.db)
        .await?;
        Ok(())
    }

    #[post("/api/v1/mcaptcha/get")]
    pub async fn get_token(
        payload: web::Json<MCaptchaDetails>,
        data: web::Data<Data>,
        id: Identity,
    ) -> ServiceResult<impl Responder> {
        is_authenticated(&id)?;
        let username = id.identity().unwrap();
        let res = match sqlx::query_as!(
            MCaptchaDetails,
            "SELECT key, name from mcaptcha_config
            WHERE key = ($1) AND user_id = (SELECT ID FROM mcaptcha_users WHERE name = $2) ",
            &payload.key,
            &username,
        )
        .fetch_one(&data.db)
        .await
        {
            Err(sqlx::Error::RowNotFound) => Err(ServiceError::TokenNotFound),
            Ok(m) => Ok(m),
            Err(e) => {
                let e: ServiceError = e.into();
                Err(e)
            }
        }?;

        Ok(HttpResponse::Ok().json(res))
    }

    #[post("/api/v1/mcaptcha/delete")]
    pub async fn delete_mcaptcha(
        payload: web::Json<MCaptchaDetails>,
        data: web::Data<Data>,
        id: Identity,
    ) -> ServiceResult<impl Responder> {
        is_authenticated(&id)?;
        let username = id.identity().unwrap();

        sqlx::query!(
            "DELETE FROM mcaptcha_config
            WHERE key = ($1) AND user_id = (SELECT ID FROM mcaptcha_users WHERE name = $2) ",
            &payload.key,
            &username,
        )
        .execute(&data.db)
        .await?;
        Ok(HttpResponse::Ok())
    }

    // Workflow:
    // 1. Sign up
    // 2. Sign in
    // 3. Add domain(DNS TXT record verification? / put string at path)
    // 4. Create token
    // 5. Add levels
    // 6. Update duration
    // 7. Start syatem

    #[cfg(test)]
    mod tests {
        use actix_web::http::{header, StatusCode};
        use actix_web::test;

        use super::*;
        use crate::tests::*;
        use crate::*;

        #[actix_rt::test]
        async fn add_mcaptcha_works() {
            const NAME: &str = "testusermcaptcha";
            const PASSWORD: &str = "longpassworddomain";
            const EMAIL: &str = "testusermcaptcha@a.com";
            const DEL_URL: &str = "/api/v1/mcaptcha/delete";

            {
                let data = Data::new().await;
                delete_user(NAME, &data).await;
            }

            // 1. add mcaptcha token
            register_and_signin(NAME, EMAIL, PASSWORD).await;
            let (data, _, signin_resp, token_key) = add_token_util(NAME, PASSWORD).await;
            let cookies = get_cookie!(signin_resp);
            let mut app = get_app!(data).await;

            //        let mut domain = MCaptchaID {
            //            name: TOKEN_NAME.into(),
            //        };

            // 4. delete token
            let del_token = test::call_service(
                &mut app,
                post_request!(&token_key, DEL_URL)
                    .cookie(cookies.clone())
                    .to_request(),
            )
            .await;
            assert_eq!(del_token.status(), StatusCode::OK);
        }

        #[actix_rt::test]
        async fn update_and_get_mcaptcha_works() {
            const NAME: &str = "updateusermcaptcha";
            const PASSWORD: &str = "longpassworddomain";
            const EMAIL: &str = "testupdateusermcaptcha@a.com";
            const UPDATE_URL: &str = "/api/v1/mcaptcha/update/key";
            const GET_URL: &str = "/api/v1/mcaptcha/get";

            {
                let data = Data::new().await;
                delete_user(NAME, &data).await;
            }

            // 1. add mcaptcha token
            register_and_signin(NAME, EMAIL, PASSWORD).await;
            let (data, _, signin_resp, token_key) = add_token_util(NAME, PASSWORD).await;
            let cookies = get_cookie!(signin_resp);
            let mut app = get_app!(data).await;

            // 2. update token key
            let update_token_resp = test::call_service(
                &mut app,
                post_request!(&token_key, UPDATE_URL)
                    .cookie(cookies.clone())
                    .to_request(),
            )
            .await;
            assert_eq!(update_token_resp.status(), StatusCode::OK);
            let updated_token: MCaptchaDetails = test::read_body_json(update_token_resp).await;

            // get token key with updated key
            let get_token_resp = test::call_service(
                &mut app,
                post_request!(&updated_token, GET_URL)
                    .cookie(cookies.clone())
                    .to_request(),
            )
            .await;
            assert_eq!(get_token_resp.status(), StatusCode::OK);

            // check if they match
            let mut get_token_key: MCaptchaDetails = test::read_body_json(get_token_resp).await;
            assert_eq!(get_token_key.key, updated_token.key);

            get_token_key.key = "nonexistent".into();

            let get_nonexistent_token_resp = test::call_service(
                &mut app,
                post_request!(&get_token_key, GET_URL)
                    .cookie(cookies.clone())
                    .to_request(),
            )
            .await;
            assert_eq!(get_nonexistent_token_resp.status(), StatusCode::NOT_FOUND);
        }
    }