//! Global settings.

use crate::*;
use std::path::{Path, PathBuf};
use std::fs::{File, create_dir_all};

const CONFIG_FILE_NAME:  &str = "tek.toml";
const PROJECT_FILE_NAME: &str = "project.toml";

/// Filesystem locations of things.
pub struct AppPaths {
    config_dir:   PathBuf,
    config_file:  PathBuf,
    data_dir:     PathBuf,
    project_file: PathBuf,
}

impl AppPaths {
    pub fn new (xdg: &XdgApp) -> Usually<Self> {
        let config_dir   = PathBuf::from(xdg.app_config()?);
        let config_file  = PathBuf::from(config_dir.join(CONFIG_FILE_NAME));
        let data_dir     = PathBuf::from(xdg.app_data()?);
        let project_file = PathBuf::from(data_dir.join(PROJECT_FILE_NAME));
        Ok(Self { config_dir, config_file, data_dir, project_file })
    }
    pub fn should_create (&self) -> bool {
        for path in [
            &self.config_dir,
            &self.config_file,
            &self.data_dir,
            &self.project_file,
        ].iter() {
            if !Path::new(path).exists() {
                return true
            }
        }
        false
    }
    pub fn create (&self) -> Usually<()> {
        for dir in [&self.config_dir, &self.data_dir].iter() {
            if !Path::new(dir).exists() {
                create_dir_all(&dir)?;
            }
        }
        for file in [&self.config_file, &self.project_file].iter() {
            if !Path::new(file).exists() {
                File::create_new(&file)?;
            }
        }
        Ok(())
    }
}