/*
 * 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 async_trait::async_trait;
use reqwest::Client;
use serde::{Deserialize, Serialize};
use url::Url;

use crate::errors::*;

/* TODO:
 * 1. Define traits to interact with mCaptcha
 * 2. Implement trait with request 3. Implement mocking for testing
 * 4. Load to crate::data::Data
 */

#[derive(Debug, Clone, Default, Deserialize, Serialize, PartialEq)]
/// Proof-of-Work CAPTCHA performance analytics
pub struct PerformanceAnalytics {
    /// log ID
    pub id: usize,
    /// time taken to generate proof
    pub time: u32,
    /// difficulty factor for which the proof was generated
    pub difficulty_factor: u32,
    /// worker/client type: wasm, javascript, python, etc.
    pub worker_type: String,
}

#[async_trait]
pub trait MCaptchaClient:
    std::marker::Send + std::marker::Sync + CloneMCaptchaClient
{
    async fn share_secret(
        &self,
        mut mcaptcha: Url,
        secret: String,
        auth_token: String,
    ) -> ServiceResult<()>;
    async fn download_benchmarks(
        &self,
        mut mcaptcha: Url,
        campaign_id: &str,
        page: usize,
    ) -> ServiceResult<Vec<PerformanceAnalytics>>;
}

/// Trait to clone MCaptchaClient
pub trait CloneMCaptchaClient {
    /// clone client
    fn clone_client(&self) -> Box<dyn MCaptchaClient>;
}

impl<T> CloneMCaptchaClient for T
where
    T: MCaptchaClient + Clone + 'static,
{
    fn clone_client(&self) -> Box<dyn MCaptchaClient> {
        Box::new(self.clone())
    }
}

impl Clone for Box<dyn MCaptchaClient> {
    fn clone(&self) -> Self {
        (**self).clone_client()
    }
}

#[derive(Debug, Clone, Default, Deserialize, Serialize, PartialEq)]
pub struct Secret {
    pub secret: String,
}

#[derive(Clone)]
pub struct MCaptchaClientReqwest {
    client: Client,
}

impl Default for MCaptchaClientReqwest {
    fn default() -> Self {
        Self {
            client: Client::new(),
        }
    }
}

#[async_trait]
impl MCaptchaClient for MCaptchaClientReqwest {
    async fn share_secret(
        &self,
        mut mcaptcha: Url,
        secret: String,
        auth_token: String,
    ) -> ServiceResult<()> {
        #[derive(Serialize)]
        struct S {
            secret: String,
            auth_token: String,
        }

        let msg = S {
            secret,
            auth_token,
        };
        mcaptcha.set_path("/api/v1/survey/secret");
        self.client
            .post(mcaptcha)
            .json(&msg)
            .send()
            .await
            .unwrap();
        Ok(())
    }
    async fn download_benchmarks(
        &self,
        mut mcaptcha: Url,
        campaign_id: &str,
        page: usize,
    ) -> ServiceResult<Vec<PerformanceAnalytics>> {
        mcaptcha.set_path(&format!("/api/v1/survey/{campaign_id}/get?page={page}"));
        let res = self
            .client
            .get(mcaptcha)
            .send()
            .await
            .unwrap()
            .json()
            .await
            .unwrap();
        Ok(res)
    }
}

#[cfg(test)]
pub mod tests {
    use super::*;
    use std::collections::HashMap;
    use std::sync::{Arc, RwLock};

    use lazy_static::lazy_static;

    lazy_static! {
        pub static ref BENCHMARK: Vec<PerformanceAnalytics> = vec![
            PerformanceAnalytics {
                id: 1,
                time: 2,
                difficulty_factor: 3,
                worker_type: "foo".to_string(),
            },
            PerformanceAnalytics {
                id: 4,
                time: 5,
                difficulty_factor: 6,
                worker_type: "bar".to_string(),
            },
        ];
    }

    #[derive(Clone)]
    pub struct TestClient {
        pub client: Arc<RwLock<HashMap<String, String>>>,
    }

    impl Default for TestClient {
        fn default() -> Self {
            Self {
                client: Arc::new(RwLock::new(HashMap::default())),
            }
        }
    }

    #[async_trait]
    impl MCaptchaClient for TestClient {
        async fn share_secret(
            &self,
            mut mcaptcha: Url,
            secret: String,
            auth_token: String,
        ) -> ServiceResult<()> {
            mcaptcha.set_path("/api/v1/survey/secret");
            let mut x = self.client.write().unwrap();
            x.insert(mcaptcha.to_string(), secret.secret.to_owned());
            drop(x);
            Ok(())
        }
        async fn download_benchmarks(
            &self,
            mcaptcha: Url,
            campaign_id: &str,
            page: usize,
        ) -> ServiceResult<Vec<PerformanceAnalytics>> {
            println!(
                "mcaptcha_url {}, campaign_id {}, page: {page}",
                mcaptcha.to_string(),
                campaign_id
            );
            let res = BENCHMARK.clone();
            Ok(res)
        }
    }
}