//! A module for managing and sharing secrets in the Wooly Vault application.
//!
//! This module provides a [`Vault`] struct that holds a secret and allows it to be shared safely
//! across the application using an [`Arc`] (Atomic Reference Counted) pointer.

use std::collections::HashSet;
use std::fmt::{Debug, Display};
use std::net::{IpAddr, SocketAddr};
use std::sync::Arc;

use libpt::log::info;
use serde::{Deserialize, Serialize};
use tokio::sync::Mutex;

/// A type alias for an [`Arc`] pointer to a [`Vault`] instance.
///
/// This type is used to share a [`Vault`] instance across multiple parts of the application.
pub type VaultRef = Arc<Vault>;

#[derive(Debug, Clone, PartialEq, Eq, Hash, Serialize, Deserialize)]
pub struct Contestant {
    ip: IpAddr,
}

/// A struct that holds a secret and provides methods for accessing it.
///
/// The [`Vault`] struct is designed to be shared safely across the application using an [`Arc`] pointer.
#[derive(Debug, Clone)]
pub struct Vault {
    /// The secret stored in the vault
    secret: String,
    contestants: Arc<Mutex<HashSet<Contestant>>>,
    winners: Arc<Mutex<HashSet<Contestant>>>,
}

impl From<IpAddr> for Contestant {
    fn from(value: IpAddr) -> Self {
        Self { ip: value }
    }
}

impl From<SocketAddr> for Contestant {
    fn from(value: SocketAddr) -> Self {
        Self { ip: value.ip() }
    }
}

impl From<&SocketAddr> for Contestant {
    fn from(value: &SocketAddr) -> Self {
        Self { ip: value.ip() }
    }
}

impl Display for Contestant {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        write!(f, "{}", self.ip)
    }
}

impl Vault {
    /// Creates a new [`Vault`] instance with the given secret.
    ///
    /// Returns an [`Arc`] pointer to the new [`Vault`] instance.
    ///
    /// # Returns
    ///
    /// A new [`Vault`] instance with the given secret.
    pub fn new(secret: &str) -> VaultRef {
        let v = Self {
            secret: secret.to_string(),
            contestants: Default::default(),
            winners: Default::default(),
        };
        Arc::new(v)
    }

    /// Returns a reference to the secret stored in the vault.
    ///
    /// # Returns
    ///
    /// A reference to the secret stored in the vault.
    pub fn secret(&self) -> &str {
        &self.secret
    }

    pub async fn add_contestant(&self, contestant: Contestant) -> bool {
        info!("new contestant: {contestant}");
        self.contestants.lock().await.insert(contestant)
    }

    pub async fn add_winner(&self, contestant: Contestant) -> bool {
        info!("new winner: {contestant}");
        self.winners.lock().await.insert(contestant)
    }

    pub async fn contestants(&self) -> HashSet<Contestant> {
        self.contestants.lock().await.clone()
    }

    pub async fn winners(&self) -> HashSet<Contestant> {
        self.winners.lock().await.clone()
    }
}