use std::sync::{Mutex, Arc};
use tera::Tera;
use crate::config::{AppConfig, ModbusValueMaps};

pub struct AppState {
    pub config: Arc<Mutex<AppConfig>>,
    pub value_maps: Arc<Mutex<ModbusValueMaps>>,
    pub templates: Tera,
}

impl AppState {
    pub fn load_from_conf(conf_path: &str) -> Self {
        let conf_str = std::fs::read_to_string(conf_path).expect("Config-Datei konnte nicht gelesen werden");

        let config: AppConfig = serde_yaml::from_str(&conf_str).expect("Config-Deserialisierung fehlgeschlagen");
        let config = Arc::new(Mutex::new(config));
        let value_maps = Arc::new(Mutex::new(ModbusValueMaps::from_config(&config.lock().unwrap())));

        let tera = match Tera::new("templates/**/*") {
            Ok(t) => t,
            Err(e) => {
                println!("Template parsing error: {}", e);
                std::process::exit(1);
            }
        };

        AppState {
            config,
            value_maps,
            templates: tera,
        }
    }
}