/*
 * Copyright (C) 2023  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 actix_web::web::ServiceConfig;
use actix_web::{web, HttpResponse, Responder};
use serde::{Deserialize, Serialize};
use url::Url;

use crate::api::v1::ROUTES;
use crate::errors::*;
use crate::mcaptcha::Secret;
use crate::AppData;

pub fn services(cfg: &mut ServiceConfig) {
    cfg.service(register);
    cfg.service(upload);
    cfg.service(download);
}

#[derive(Serialize, Deserialize, Clone, Debug, Eq, PartialEq)]
pub struct MCaptchaInstance {
    pub url: Url,
    pub auth_token: String,
}

#[actix_web_codegen_const_routes::post(path = "ROUTES.mcaptcha.register")]
async fn register(
    data: AppData,
    payload: web::Json<MCaptchaInstance>,
) -> ServiceResult<impl Responder> {
    /* Summary
     * 1. Check if secret exists
     * 2. If not, add hostname and create secret
     * 3. Post to mCaptcha
     */

    let url_str = payload.url.to_string();
    let secret = if data.mcaptcha_url_exists(&url_str).await? {
        data.mcaptcha_update_secret(&url_str).await?
    } else {
        data.mcaptcha_register_instance(&url_str).await?
    };

    let payload = payload.into_inner();
    data.mcaptcha
        .share_secret(payload.url, secret, payload.auth_token)
        .await?;

    Ok(HttpResponse::Ok())
}

#[actix_web_codegen_const_routes::post(path = "ROUTES.mcaptcha.upload")]
async fn upload(
    data: AppData,
    campaign: web::Path<uuid::Uuid>,
    payload: web::Json<Secret>,
) -> ServiceResult<impl Responder> {
    /* TODO
     * 1. Authenticate: Get URL from secret
     * 2. Check if campaign exists
     * 3. If not: create campaign
     * 4. Get last known sync point
     * 5. Download results
     * 6. Update sync point
     */
    let url = data
        .mcaptcha_authenticate_and_get_url(&payload.secret)
        .await?;
    let campaign_str = campaign.to_string();

    if !data
        .mcaptcha_campaign_is_registered(&campaign, &payload.secret)
        .await?
    {
        data.mcaptcha_register_campaign(&campaign, &payload.secret)
            .await?;
    }

    let checkpoint = data
        .mcaptcha_get_checkpoint(&campaign, &payload.secret)
        .await?;
    const LIMIT: usize = 50;
    let mut page = 1 + (checkpoint / LIMIT);
    loop {
        let mut res = data
            .mcaptcha
            .download_benchmarks(url.clone(), &campaign_str, page)
            .await?;
        let skip = checkpoint - ((page - 1) * LIMIT);
        let new_records = res.len() - skip as usize;
        let mut skip = skip as isize;
        for r in res.drain(0..) {
            if skip > 0 {
                skip -= 1;
                continue;
            }
            data.mcaptcha_insert_analytics(&campaign, &payload.secret, &r)
                .await?;
        }
        data.mcaptcha_set_checkpoint(&campaign, &payload.secret, new_records)
            .await?;

        page += 1;
        if res.len() < LIMIT {
            break;
        }
    }

    Ok(HttpResponse::Ok())
}

#[derive(Serialize, Deserialize, Clone, Debug, Eq, PartialEq)]
pub struct Page {
    pub page: usize,
}

#[actix_web_codegen_const_routes::get(path = "ROUTES.mcaptcha.download")]
async fn download(
    data: AppData,
    page: web::Query<Page>,
    public_id: web::Path<uuid::Uuid>,
) -> ServiceResult<impl Responder> {
    const LIMIT: usize = 50;
    let offset = LIMIT as isize * ((page.page as isize) - 1);
    let offset = if offset < 0 { 0 } else { offset };
    let public_id = public_id.into_inner();
    let resp = data
        .mcaptcha_analytics_fetch(&public_id, LIMIT, offset as usize)
        .await?;
    Ok(HttpResponse::Ok().json(resp))
}

#[cfg(test)]
mod tests {
    use crate::api::v1::bench::Submission;
    use crate::api::v1::bench::SubmissionType;
    use crate::api::v1::get_random;
    use crate::errors::*;
    use crate::mcaptcha::PerformanceAnalytics;
    use crate::mcaptcha::Secret;
    use crate::tests::*;
    use crate::*;

    use actix_web::{http::header, test};

    #[actix_rt::test]
    async fn mcaptcha_hooks_work() {
        let mcaptcha_instance =
            url::Url::parse("http://mcaptcha_hooks_work.example.org").unwrap();
        let mcaptcha_instance_str = mcaptcha_instance.to_string();
        let campaign_id = uuid::Uuid::new_v4();

        let (data, client) = get_test_data_with_mcaptcha_client().await;
        let app = get_app!(data).await;

        if data
            .mcaptcha_url_exists(&mcaptcha_instance_str)
            .await
            .unwrap()
        {
            let secret = data
                .mcaptcha_update_secret(&mcaptcha_instance_str)
                .await
                .unwrap();
            data.mcaptcha_delete_mcaptcha_instance(&mcaptcha_instance_str, &secret)
                .await
                .unwrap();
        }

        let payload = super::MCaptchaInstance {
            url: mcaptcha_instance.clone(),
            auth_token: get_random(23),
        };

        let resp = test::call_service(
            &app,
            post_request!(&payload, V1_API_ROUTES.mcaptcha.register).to_request(),
        )
        .await;
        assert_eq!(resp.status(), StatusCode::OK);

        let secret = {
            let mut mcaptcha = payload.url.clone();
            mcaptcha.set_path("/api/v1/survey/secret");
            let mut x = client.client.write().unwrap();
            x.remove(&mcaptcha.to_string()).unwrap()
        };

        let resp2 = test::call_service(
            &app,
            post_request!(&payload, V1_API_ROUTES.mcaptcha.register).to_request(),
        )
        .await;
        assert_eq!(resp2.status(), StatusCode::OK);

        let secret2 = {
            let mut mcaptcha = payload.url.clone();
            mcaptcha.set_path("/api/v1/survey/secret");
            let mut x = client.client.write().unwrap();
            x.remove(&mcaptcha.to_string()).unwrap()
        };

        assert_ne!(secret, secret2);
        let secret = secret2;

        let payload = Secret {
            secret: secret.clone(),
        };

        if data
            .mcaptcha_campaign_is_registered(&campaign_id, &secret)
            .await
            .unwrap()
        {
            data.mcaptcha_delete_mcaptcha_campaign(&campaign_id, &secret)
                .await
                .unwrap();
        }

        let resp = test::call_service(
            &app,
            post_request!(
                &payload,
                &V1_API_ROUTES
                    .mcaptcha
                    .get_upload_route(&campaign_id.to_string())
            )
            .to_request(),
        )
        .await;
        assert_eq!(resp.status(), StatusCode::OK);

        let public_id = data
            .mcaptcha_get_campaign_public_id(&campaign_id, &secret)
            .await
            .unwrap();

        let expected = crate::mcaptcha::tests::BENCHMARK.clone();

        let got = data
            .mcaptcha_analytics_fetch(&public_id, 50, 0)
            .await
            .unwrap();

        for i in 0..2 {
            assert_eq!(got[i].time, expected[i].time);
            assert_eq!(got[i].difficulty_factor, expected[i].difficulty_factor);
            assert_eq!(got[i].worker_type, expected[i].worker_type);
        }

        let resp = get_request!(
            &app,
            &V1_API_ROUTES
                .mcaptcha
                .get_download_route(&public_id.to_string(), 0)
        );
        assert_eq!(resp.status(), StatusCode::OK);
        let resp: Vec<PerformanceAnalytics> = test::read_body_json(resp).await;
        assert_eq!(resp.len(), 2);
        assert_eq!(resp, got);
    }
}