use crate::configuration::Configuration;
use std::io::{Error, ErrorKind::Other, Result};
use std::process::{Command, Stdio};

const COMMAND: &str = "rsync";

pub struct Publish;

impl Publish {
    pub fn new() -> Self {
        Publish
    }
}

impl super::Command for Publish {
    fn before_dependencies(&self) -> Vec<Box<dyn super::Command>> {
        vec![]
    }

    fn execute(
        &self,
        input: Option<&String>,
        configuration: &Configuration,
        _: &str,
    ) -> Result<()> {
        let input = input
            .ok_or_else(|| Error::new(Other, "You must provide a location to publish the blog"))?;

        Command::new(COMMAND)
            .arg("--version")
            .stdout(Stdio::null())
            .stderr(Stdio::null())
            .status()
            .map_err(|_| Error::new(Other, "Publishing requires rsync"))?;

        Command::new(COMMAND)
            .arg("-r")
            .arg(format!(
                "{}/",
                &configuration.blog_output_directory.display()
            ))
            .arg(input.as_str())
            .stdout(Stdio::null())
            .stderr(Stdio::null())
            .status()
            .map_err(|_| Error::new(Other, "Rsync failed to publish."))?;
        Ok(())
    }

    fn after_dependencies(&self) -> Vec<Box<dyn super::Command>> {
        vec![]
    }

    fn command(&self) -> &'static str {
        "publish"
    }

    fn help(&self) -> &'static str {
        "<destination>\t\tPublishes the blog to a remote host"
    }
}