use std::process::{Command, Stdio};
use std::io::Read;

use tempfile::NamedTempFile;

use crate::error::{Error::*, Result};

pub fn get_string(note_editor: Option<&String>) -> Result<String> {
    let note_editor = if let Some(note_editor) = note_editor {
        note_editor
    } else {
        return Err(EditorIsEmpty);
    };
    let parts: Vec<_> = note_editor.split(' ').filter(|p| !p.is_empty()).collect();
    let editor = if let Some(name) = parts.get(0) {
        name.to_owned()
    } else {
        return Err(EditorIsEmpty);
    };

    let mut c = Command::new(editor);

    if parts.len() > 1 {
        for part in &parts[1..] {
            c.arg(part);
        }
    }

    let mut tmpfile = NamedTempFile::new().map_err(|e| NoTmpFile(e.to_string()))?;

    c.arg(tmpfile.as_ref());

    let status = c
        .stdin(Stdio::inherit())
        .stdout(Stdio::inherit())
        .stderr(Stdio::inherit())
        .output().map_err(|e| EditorFailed {
            editor: note_editor.clone(),
            error: e.to_string(),
        })?
        .status;

    if status.success() {
        let mut note = String::new();

        tmpfile.read_to_string(&mut note).map_err(|e| CouldntReadTmpFile(e.to_string()))?;

        Ok(note)
    } else {
        Err(EditorFailed { editor: note_editor.clone(), error: status.to_string() })
    }
}