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    /*
     * Copyright (C) 2022  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::{web, HttpResponse, Responder};
    use libmcaptcha::defense::Level;
    use libmcaptcha::master::messages::RenameBuilder;
    use serde::{Deserialize, Serialize};

    use super::create::MCaptchaDetails;
    use super::get_random;
    use crate::errors::*;
    use crate::AppData;

    #[my_codegen::post(
        path = "crate::V1_API_ROUTES.captcha.update_key",
        wrap = "crate::api::v1::get_middleware()"
    )]
    pub async fn update_key(
        payload: web::Json<MCaptchaDetails>,
        data: AppData,
        id: Identity,
    ) -> ServiceResult<impl Responder> {
        let username = id.identity().unwrap();
        let mut key;

        loop {
            key = get_random(32);
            let res = runner::update_key(&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 {
                    return Err(sqlx::Error::Database(err).into());
                }
            };
        }

        let payload = payload.into_inner();
        let rename = RenameBuilder::default()
            .name(payload.key)
            .rename_to(key.clone())
            .build()
            .unwrap();
        data.captcha.rename(rename).await?;

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

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

    #[derive(Serialize, Deserialize)]
    pub struct UpdateCaptcha {
        pub levels: Vec<Level>,
        pub duration: u32,
        pub description: String,
        pub key: String,
    }

    #[my_codegen::post(
        path = "crate::V1_API_ROUTES.captcha.update",
        wrap = "crate::api::v1::get_middleware()"
    )]
    pub async fn update_captcha(
        payload: web::Json<UpdateCaptcha>,
        data: AppData,
        id: Identity,
    ) -> ServiceResult<impl Responder> {
        let username = id.identity().unwrap();
        runner::update_captcha(&payload, &data, &username).await?;
        Ok(HttpResponse::Ok())
    }

    pub mod runner {
        use futures::future::try_join_all;
        use libmcaptcha::{master::messages::RemoveCaptcha, DefenseBuilder};

        use super::*;

        pub async fn update_key(
            key: &str,
            old_key: &str,
            username: &str,
            data: &AppData,
        ) -> 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(())
        }

        pub async fn update_captcha(
            payload: &UpdateCaptcha,
            data: &AppData,
            username: &str,
        ) -> ServiceResult<()> {
            let mut defense = DefenseBuilder::default();

            for level in payload.levels.iter() {
                defense.add_level(*level)?;
            }

            // I feel this is necessary as both difficulty factor _and_ visitor threshold of a
            // level could change so doing this would not require us to send level_id to client
            // still, needs to be benchmarked
            defense.build()?;

            let mut futs = Vec::with_capacity(payload.levels.len() + 2);
            sqlx::query!(
                "DELETE FROM mcaptcha_levels
            WHERE config_id = (
                SELECT config_id FROM mcaptcha_config where key = ($1)
                AND user_id = (
                SELECT ID from mcaptcha_users WHERE name = $2
                )
                )",
                &payload.key,
                &username
            )
            .execute(&data.db)
            .await?;

            let update_fut = sqlx::query!(
                "UPDATE mcaptcha_config SET name = $1, duration = $2
                WHERE user_id = (SELECT ID FROM mcaptcha_users WHERE name = $3)
                AND key = $4",
                &payload.description,
                payload.duration as i32,
                &username,
                &payload.key,
            )
            .execute(&data.db); //.await?;

            futs.push(update_fut);

            for level in payload.levels.iter() {
                let difficulty_factor = level.difficulty_factor as i32;
                let visitor_threshold = level.visitor_threshold as i32;
                let fut = sqlx::query!(
                    "INSERT INTO mcaptcha_levels (
                difficulty_factor,
                visitor_threshold,
                config_id) VALUES  (
                $1, $2, (
                        SELECT config_id FROM mcaptcha_config WHERE key = ($3) AND
                        user_id = (
                            SELECT ID from mcaptcha_users WHERE name = $4
                        )
                    ));",
                    difficulty_factor,
                    visitor_threshold,
                    &payload.key,
                    &username,
                )
                .execute(&data.db); //.await?;
                futs.push(fut);
            }

            try_join_all(futs).await?;
            if let Err(ServiceError::CaptchaError(e)) = data
                .captcha
                .remove(RemoveCaptcha(payload.key.clone()))
                .await
            {
                log::error!(
                    "Deleting captcha key {} while updating it, error: {:?}",
                    &payload.key,
                    e
                );
            }
            Ok(())
        }
    }

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

        use crate::api::v1::mcaptcha::create::MCaptchaDetails;
        use crate::api::v1::mcaptcha::stats::StatsPayload;
        use crate::api::v1::ROUTES;
        use crate::tests::*;
        use crate::*;

        #[actix_rt::test]
        async fn update_and_get_mcaptcha_works() {
            const NAME: &str = "updateusermcaptcha";
            const PASSWORD: &str = "longpassworddomain";
            const EMAIL: &str = "testupdateusermcaptcha@a.com";

            {
                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_levels_util(NAME, PASSWORD).await;
            let cookies = get_cookie!(signin_resp);
            let app = get_app!(data).await;

            // 2. update token key
            let update_token_resp = test::call_service(
                &app,
                post_request!(&token_key, ROUTES.captcha.update_key)
                    .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 levels with udpated key
            let get_token_resp = test::call_service(
                &app,
                post_request!(&updated_token, ROUTES.captcha.get)
                    .cookie(cookies.clone())
                    .to_request(),
            )
            .await;
            // if updated key doesn't exist in databse, a non 200 result will bereturned
            assert_eq!(get_token_resp.status(), StatusCode::OK);

            // get stats
            let paylod = StatsPayload { key: token_key.key };
            let get_statis_resp = test::call_service(
                &app,
                post_request!(&paylod, ROUTES.captcha.stats.get)
                    .cookie(cookies.clone())
                    .to_request(),
            )
            .await;
            // if updated key doesn't exist in databse, a non 200 result will bereturned
            assert_eq!(get_statis_resp.status(), StatusCode::OK);
        }
    }