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use std::sync::Arc;

use sqlx::PgPool;
use stack_up::{
    Configuration,
    cache::{RedisConnection, RedisManager},
};
use tonic::Status;
use tracing::error;

use crate::cnfg::LocalConfig;

#[derive(Clone)]
pub struct AppHandle(Arc<AppState>);

impl std::ops::Deref for AppHandle {
    type Target = Arc<AppState>;

    fn deref(&self) -> &Self::Target {
        &self.0
    }
}

#[derive(Clone)]
pub struct Services {
    pub postgres: PgPool,
    pub cache: RedisManager,
}

impl Services {
    pub fn new(postgres: PgPool, cache: RedisManager) -> Self {
        Self { postgres, cache }
    }
}

pub struct AppState {
    pub services: Services,
    pub local_config: LocalConfig,
}

impl AppState {
    pub async fn create(
        services: Services,
        configuration: &Configuration,
    ) -> Result<AppHandle, anyhow::Error> {
        let local_config: LocalConfig = serde_json::from_value(configuration.misc.clone())?;

        Ok(AppHandle(Arc::new(Self {
            services,
            local_config,
        })))
    }

    pub async fn cache(&self) -> Result<RedisConnection, tonic::Status> {
        let cache = self
            .services
            .cache
            .get()
            .await
            .inspect_err(|e| error!("{e}"))
            .map_err(|_e| Status::internal("storage not ready"))?;

        Ok(cache)
    }
}