use std::path::PathBuf;

use tauri::{AppHandle, Manager};

use super::types::RuntimeConfig;

pub fn config_path(app: &AppHandle) -> Result<PathBuf, String> {
    let data_dir = app
        .path()
        .app_data_dir()
        .map_err(|e| format!("Cannot resolve app data dir: {e}"))?;
    std::fs::create_dir_all(&data_dir).map_err(|e| format!("Cannot create app data dir: {e}"))?;
    Ok(data_dir.join("config.json"))
}

pub fn load_runtime_config(app: &AppHandle) -> Result<RuntimeConfig, String> {
    let path = config_path(app)?;
    if !path.exists() {
        return Ok(RuntimeConfig::default());
    }

    let json = std::fs::read_to_string(&path).map_err(|e| format!("Read error: {e}"))?;
    serde_json::from_str(&json).map_err(|e| format!("Parse error: {e}"))
}

pub fn save_runtime_config(app: &AppHandle, config: &RuntimeConfig) -> Result<(), String> {
    let path = config_path(app)?;
    let json =
        serde_json::to_string_pretty(config).map_err(|e| format!("Serialization error: {e}"))?;
    std::fs::write(&path, json).map_err(|e| format!("Write error: {e}"))?;
    Ok(())
}