use clap::Parser;

/// GeneIT backend API
#[derive(Parser, Debug, Clone)]
#[clap(author, version, about, long_about = None)]
pub struct AppConfig {
    /// Listen address
    #[clap(short, long, env, default_value = "0.0.0.0:8000")]
    pub listen_address: String,

    /// Website origin
    #[clap(short, long, env, default_value = "http://localhost:3000")]
    pub website_origin: String,

    /// Proxy IP, might end with a star "*"
    #[clap(short, long, env)]
    pub proxy_ip: Option<String>,

    /// PostgreSQL database host
    #[clap(long, env, default_value = "localhost")]
    db_host: String,

    /// PostgreSQL database port
    #[clap(long, env, default_value_t = 5432)]
    db_port: u16,

    /// PostgreSQL username
    #[clap(long, env, default_value = "user")]
    db_username: String,

    /// PostgreSQL password
    #[clap(long, env, default_value = "pass")]
    db_password: String,

    /// PostgreSQL database name
    #[clap(long, env, default_value = "geneit")]
    db_name: String,

    /// Redis connection hostname
    #[clap(long, env, default_value = "localhost")]
    redis_hostname: String,

    /// Redis connection port
    #[clap(long, env, default_value_t = 6379)]
    redis_port: u16,

    /// Redis database number
    #[clap(long, env, default_value_t = 0)]
    redis_db_number: i64,

    /// Redis username
    #[clap(long, env)]
    redis_username: Option<String>,

    /// Redis password
    #[clap(long, env, default_value = "secretredis")]
    redis_password: String,
}

lazy_static::lazy_static! {
    static ref ARGS: AppConfig = {
        AppConfig::parse()
    };
}

impl AppConfig {
    /// Get parsed command line arguments
    pub fn get() -> &'static AppConfig {
        &ARGS
    }

    /// Get full db connection chain
    pub fn db_connection_chain(&self) -> String {
        format!(
            "postgres://{}:{}@{}:{}/{}",
            self.db_username, self.db_password, self.db_host, self.db_port, self.db_name
        )
    }

    /// Get Redis connection configuration
    pub fn redis_connection_config(&self) -> redis::ConnectionInfo {
        redis::ConnectionInfo {
            addr: redis::ConnectionAddr::Tcp(self.redis_hostname.clone(), self.redis_port),
            redis: redis::RedisConnectionInfo {
                db: self.redis_db_number,
                username: self.redis_username.clone(),
                password: Some(self.redis_password.clone()),
            },
        }
    }
}