use std::path::{Path, PathBuf};

pub fn remove_extension(file_path: &str) -> String {
    let path = Path::new(file_path);

    match path.file_stem() {
        Some(stem) => {
            let mut new_path = PathBuf::from(stem);

            if let Some(parent) = path.parent() {
                new_path = parent.join(stem);
            }

            new_path.to_string_lossy().into_owned()
        }
        None => file_path.to_string()
    }
}

pub fn remove_path_and_get_filename(file_path: &str) -> Option<String> {
    let path = Path::new(file_path);

    path.file_name()
        .map(|name| name.to_string_lossy().into_owned())
}

pub fn get_directory_path(file_path: &str) -> Option<String> {
    let path = Path::new(file_path);

    path.parent()
        .map(|p| p.to_string_lossy().into_owned())
}

#[cfg(test)]
mod tests {
    use std::env;
    use super::*;
    use serial_test::serial;
    use crate::env::{get, set};

    fn setup() {
        env::remove_var("RUST_PROFILE");
    }

    fn teardown() {
        env::remove_var("RUST_PROFILE");
    }

    #[test]
    #[serial]
    fn test_remove_extension() {
        setup();
        let a = "apm-bigdata/flower-device/1111|2222|3333|4444.csv";
        let b= remove_extension(a);

        //println!("테스트 중: value = {}", b);
        assert!(b.eq("apm-bigdata/flower-device/1111|2222|3333|4444"));
        teardown();
    }

    #[test]
    #[serial]
    fn test_remove_path_and_get_filename() {
        setup();
        let a = "apm-bigdata/flower-device/1111|2222|3333|4444.csv";
        let b= remove_path_and_get_filename(a).unwrap();

        //println!("테스트 중: value = {}", b);
        assert!(b.eq("1111|2222|3333|4444.csv"));
        teardown();
    }

    #[test]
    #[serial]
    fn test_get_directory_path() {
        setup();
        let a = "apm-bigdata/flower-device/1111|2222|3333|4444.csv";
        let b= get_directory_path(a).unwrap();

        println!("테스트 중: value = {}", b);
        assert!(b.eq("apm-bigdata/flower-device"));
        teardown();
    }
}