use std::fs::{File, OpenOptions};
use std::io::Write;

pub struct FileEnv {
    pub open: FileOpen,
    pub append_line: FileAppendLine,
}
impl Default for FileEnv {
    fn default() -> Self {
        Self {
            open: |path| File::open(path),
            append_line: |file_name, line| {
                let mut file = OpenOptions::new()
                    .write(true)
                    .append(true)
                    .create(true)
                    .open(file_name)
                    .unwrap();
                writeln!(file, "{}", line)?;
                Ok(())
            },
        }
    }
}
pub type FileOpen = fn(path: &str) -> std::io::Result<File>;
pub type FileAppendLine = fn(paht: &str, line: &str) -> std::io::Result<()>;