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//! This module deals with creating files and editing them.

pub mod edit;
use anyhow::{Context, Result};
use std::env;
use std::fs;
use std::path;

// todo: make readable names

/// All necessary filepaths' storage.
#[derive(Debug, PartialEq)]
pub struct FilePaths {
    folder_path: String,
    config_path: String,
    password_path: String,
}

impl FilePaths {
    /// Generate filepaths.
    pub fn default() -> Result<Self> {
        #[cfg(target_os = "linux")]
        let folder_path: String = format!(
            "{}/.config/pash",
            env::var("HOME").context("Failed to get $HOME")?
        );
        #[cfg(target_os = "windows")]
        let folder_path: String = format!(
            "{}/pash",
            env::var("APPDATA").context("Failed to get %APPDATA%")?
        );

        let config_path: String = format!("{}/config.toml", folder_path);
        let password_path: String = format!("{}/passwords.toml", folder_path);

        Ok(Self {
            folder_path,
            config_path,
            password_path,
        })
    }

    /// Create files in default filepaths if not exist.
    pub fn init() -> Result<()> {
        let list = Self::default().context("Failed to fetch default paths")?;
        let (config_exists, passwords_exist) = (
            path::Path::new(&list.config_path).exists(),
            path::Path::new(&list.password_path).exists(),
        );

        fs::create_dir_all(list.folder_path).context("Failed to init 'pash' directory")?;

        if !config_exists && !passwords_exist {
            fs::File::create(list.config_path).context("Failed to init 'config.toml' file")?;
            fs::File::create(list.password_path).context("Failed to init 'passwords.toml' file")?;
        }

        Ok(())
    }
}

#[cfg(test)]
mod tests {
    use super::*;

    #[cfg(target_os = "linux")]
    #[test]
    fn linux_file_paths() -> Result<()> {
        assert_eq!(
            FilePaths {
                folder_path: format!(
                    "{}/.config/pash",
                    env::var("HOME").context("Failed to get $HOME")?
                ),
                config_path: format!(
                    "{}/.config/pash/config.toml",
                    env::var("HOME").context("Failed to get $HOME")?
                ),
                password_path: format!(
                    "{}/.config/pash/passwords.toml",
                    env::var("HOME").context("Failed to get $HOME")?
                )
            },
            FilePaths::default().context("Failed to fetch default paths")?
        );
        Ok(())
    }

    #[cfg(target_os = "windows")]
    #[test]
    fn windows_file_paths() -> Result<()> {
        assert_eq!(
            FilePaths {
                folder_path: format!("{}/pash", env::var("APPDATA").context("Failed to get %APPDATA%")?),
                config_path: format!("{}/pash/config.toml", env::var("APPDATA").context("Failed to get %APPDATA%")?),
                password_path: format!("{}/pash/passwords.toml", env::var("APPDATA").context("Failed to get %APPDATA%")?)
            },
            FilePaths::default().context("Failed to fetch default paths")?
        );
        Ok(())
    }
}