//! Fresh reads of provider configuration and keys for the host harness.
use sausage_vfs::{Layer, Open};
use serde::{Deserialize, Serialize};
use std::{collections::BTreeMap, sync::Arc};

pub const PATH: &str = "/etc/sausage/config.yaml";
#[derive(Default, Deserialize, Serialize)]
#[serde(default)]
pub struct Provider {
    #[serde(rename = "type")]
    pub api_type: String,
    pub base_url: String,
    pub api_key: String,
    pub catalog: Option<String>,
    pub models: Vec<serde_json::Value>,
}
#[derive(Default, Deserialize)]
#[serde(default)]
pub struct Config {
    pub providers: BTreeMap<String, Provider>,
}
impl Config {
    pub async fn read(root: &Arc<dyn Layer>) -> anyhow::Result<Self> {
        let file = match root.open(PATH, Open::default()).await {
            Ok(file) => file,
            Err(error) if error.kind() == std::io::ErrorKind::NotFound => {
                return Ok(Self::default());
            }
            Err(error) => return Err(error.into()),
        };
        serde_yaml_ng::from_slice(&file.read(0, 16 * 1024 * 1024).await?)
            .map_err(|error| anyhow::anyhow!("Cannot read {PATH}: {error}"))
    }
}