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use crate::atoms::Outcome;

use super::super::Atom;
use super::FileAtom;
use std::path::PathBuf;

pub struct Create {
    pub path: PathBuf,
}

impl FileAtom for Create {
    fn get_path(&self) -> &PathBuf {
        &self.path
    }
}

impl std::fmt::Display for Create {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        write!(f, "The file {} needs to be created", self.path.display(),)
    }
}

impl Atom for Create {
    fn plan(&self) -> anyhow::Result<Outcome> {
        Ok(Outcome {
            side_effects: vec![],
            should_run: !self.path.exists(),
        })
    }

    fn execute(&mut self) -> anyhow::Result<()> {
        std::fs::File::create(&self.path)?;

        Ok(())
    }
}

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

    #[test]
    fn it_can_plan() {
        let file_create = Create {
            path: std::path::PathBuf::from("some-random-path"),
        };

        assert_eq!(true, file_create.plan().unwrap().should_run);

        let temp_file = match tempfile::NamedTempFile::new() {
            std::result::Result::Ok(file) => file,
            std::result::Result::Err(_) => {
                assert_eq!(false, true);
                return;
            }
        };

        let file_create = Create {
            path: temp_file.path().to_path_buf(),
        };

        assert_eq!(false, file_create.plan().unwrap().should_run);
    }

    #[test]
    fn it_can_execute() {
        let temp_dir = match tempfile::tempdir() {
            std::result::Result::Ok(dir) => dir,
            std::result::Result::Err(_) => {
                assert_eq!(false, true);
                return;
            }
        };

        let mut file_create = Create {
            path: temp_dir.path().join("create-me"),
        };

        assert_eq!(true, file_create.execute().is_ok());
        assert_eq!(false, file_create.plan().unwrap().should_run);
    }
}