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/*
 * mCaptcha - A proof of work based DoS protection system
 * Copyright © 2021 Aravinth Manivannan <realravinth@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 <http://www.gnu.org/licenses/>.
 */
//! [Master] actor module that manages [MCaptcha] actors

use serde::{Deserialize, Serialize};

use crate::mcaptcha::*;

#[cfg(feature = "full")]
pub mod embedded;
#[cfg(feature = "full")]
pub mod redis;

#[cfg(feature = "full")]
/// Describes actor handler trait impls that are required by a cache implementation
pub trait Master:
    actix::Actor
    + actix::Handler<messages::AddVisitor>
    + actix::Handler<messages::AddSite>
    + actix::Handler<messages::Rename>
    + actix::Handler<messages::RemoveCaptcha>
    + actix::Handler<messages::SetInternalData>
    + actix::Handler<messages::GetInternalData>
{
}

#[derive(Serialize, Deserialize)]
/// [mCaptcha Redis module](https://github.com/mCaptcha/cache) uses this datatype for CAPTCHA
/// registration
pub struct CreateMCaptcha {
    pub levels: Vec<crate::defense::Level>,
    pub duration: u64,
}

/// Struct representing the return datatime of
/// [AddVisitor] message. Contains MCaptcha lifetime
/// and difficulty factor
#[derive(Debug, Clone, Deserialize, Serialize)]
pub struct AddVisitorResult {
    pub duration: u64,
    pub difficulty_factor: u32,
}

impl AddVisitorResult {
    /// create new [AddVisitorResult] from [MCaptcha]
    pub fn new(m: &MCaptcha) -> Self {
        AddVisitorResult {
            duration: m.get_duration(),
            difficulty_factor: m.get_difficulty(),
        }
    }
}

#[cfg(feature = "full")]
pub mod messages {
    //! Messages that a [super::Master] should respond to
    use std::collections::HashMap;
    //    use std::sync::mpsc::Receiver;

    use actix::dev::*;
    use derive_builder::Builder;
    use serde::{Deserialize, Serialize};
    use tokio::sync::oneshot::Receiver;

    use crate::errors::CaptchaResult;
    use crate::mcaptcha::MCaptcha;

    /// Message to add visitor to an [MCaptcha] actor
    #[derive(Message, Clone, Debug, Deserialize, Serialize)]
    #[rtype(result = "Receiver<CaptchaResult<Option<super::AddVisitorResult>>>")]
    pub struct AddVisitor(pub String);

    /// Message to add an [Counter] actor to [Master]
    #[derive(Message, Builder, Clone, Debug, Deserialize, Serialize)]
    #[rtype(result = "Receiver<CaptchaResult<()>>")]
    pub struct AddSite {
        pub id: String,
        pub mcaptcha: MCaptcha,
    }

    /// Message to rename an MCaptcha actor
    #[derive(Message, Builder, Clone, Debug, Deserialize, Serialize)]
    #[rtype(result = "Receiver<CaptchaResult<()>>")]
    pub struct Rename {
        pub name: String,
        pub rename_to: String,
    }

    /// Message to delete [Counter] actor
    #[derive(Message, Clone, Debug, Deserialize, Serialize)]
    #[rtype(result = "Receiver<CaptchaResult<()>>")]
    pub struct RemoveCaptcha(pub String);

    #[derive(Clone, Debug, Deserialize, Serialize)]
    pub struct InternalData {
        pub name: String,
        pub mcaptcha: MCaptcha,
    }

    /// Gets internal Captcha data
    #[derive(Message)]
    #[rtype(result = "Receiver<CaptchaResult<HashMap<String, MCaptcha>>>")]
    pub struct GetInternalData;

    /// Sets internal Captcha data
    #[derive(Message)]
    #[rtype(result = "Receiver<CaptchaResult<()>>")]
    pub struct SetInternalData {
        pub mcaptcha: HashMap<String, MCaptcha>,
    }
}