use crate::configuration::Configuration;
use std::fmt::Write;
use std::fs;
use std::io::{Error, ErrorKind, Result};
use std::path::PathBuf;

pub fn status(configuration: &Configuration) -> Result<String> {
    let mut status_message = String::new();

    status_message.push_str("# Configuration\n");
    status_message.push_str("\n## Directories\n");

    // Main Configuration Locations
    status_message.push_str(&get_directory_stats(
        "Configuration",
        &configuration.config_directory,
    )?);
    status_message.push_str(&get_directory_stats("Data", &configuration.data_directory)?);
    status_message.push_str(&get_directory_stats(
        "Output",
        &configuration.output_directory,
    )?);

    status_message.push_str("\n## Blog Settings\n");
    writeln!(
        &mut status_message,
        "Number of posts to keep: {}",
        configuration.max_posts
    )
    .map_err(|_| Error::new(ErrorKind::Other, "Unable to write status"))?;
    Ok(status_message)
}

fn get_directory_stats(label: &str, directory: &PathBuf) -> Result<String> {
    let mut status_message = String::new();

    write!(&mut status_message, "{}: {}. ", label, directory.display())
        .map_err(|_| Error::new(ErrorKind::Other, "Unable to write status"))?;
    if directory.exists() {
        status_message.push_str("Exists ");
        if fs::read_dir(directory).is_ok() {
            status_message.push_str("and is readable.\n");
        } else {
            status_message.push_str("but is not readable.\n");
        }
    } else {
        status_message.push_str("Does not exist.\n");
    }

    Ok(status_message)
}