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use config::{File, Map};
use serde::{Deserialize, Serialize};

#[derive(Debug, Serialize, Deserialize)]
#[serde(default)]
pub struct Config {
    pub root: String,
    pub user: Vec<String>,
    pub directories: Vec<String>,
    pub custom_directories: Map<String, String>
}

impl Default for Config {
    fn default() -> Self {
        Self {
            root: "/mnt/backup".to_string(),
            user: vec![],
            directories: vec![],
            custom_directories: Map::new(),
        }
    }
}

impl Config {
    pub fn load() -> Result<Self, config::ConfigError> {
        let config = config::Config::builder()
            .add_source(File::with_name("config.toml").required(false))
            .add_source(config::Environment::with_prefix("FXBAUP").separator("_"))
            .build()?;

        config.try_deserialize()
    }
}