use anyhow::{Context, Result};
use serde::Deserialize;
use std::path::PathBuf;

#[derive(Debug, Clone, Deserialize)]
pub struct Config {
    pub listen: String,
    pub db_path: PathBuf,
    pub topology_path: PathBuf,
    /// MM-local checkout scratch dir (per-sha worktrees live here).
    pub workdir: PathBuf,
    /// MM-local releases dir (`releases/<version>/` and `current` live here).
    pub release_root: PathBuf,
    /// Scratch postgres DB url used by `migration_dry_run`. Sando drops and
    /// recreates the schema on every run, so do not point this at anything
    /// you care about.
    #[serde(default)]
    pub scratch_db_url: Option<String>,
}

impl Config {
    pub fn load() -> Result<Self> {
        let path = std::env::var("SANDO_CONFIG").unwrap_or_else(|_| "sando-daemon.toml".into());
        let raw = std::fs::read_to_string(&path)
            .with_context(|| format!("reading daemon config at {path}"))?;
        Ok(toml::from_str(&raw)?)
    }
}