use clap::{ArgMatches, SubCommand, App};
use mdbook::MDBook;
use mdbook::errors::*;
use {get_book_dir, open};

// Build command implementation
pub fn build(args: &ArgMatches) -> Result<()> {
    let book_dir = get_book_dir(args);
    let book = MDBook::new(&book_dir).read_config()?;

    let mut book = match args.value_of("dest-dir") {
        Some(dest_dir) => book.with_destination(dest_dir),
        None => book,
    };

    if args.is_present("no-create") {
        book.create_missing = false;
    }

    if args.is_present("curly-quotes") {
        book = book.with_curly_quotes(true);
    }

    book.build()?;

    if let Some(d) = book.get_destination() {
        if args.is_present("open") {
            open(d.join("index.html"));
        }
    }

    Ok(())
}

pub fn make_subcommand<'a, 'b>() -> App<'a, 'b> {
    SubCommand::with_name("build")
        .about("Build the book from the markdown files")
        .arg_from_usage("-o, --open 'Open the compiled book in a web browser'")
        .arg_from_usage("-d, --dest-dir=[dest-dir] 'The output directory for your book{n}(Defaults to ./book when omitted)'")
        .arg_from_usage("--no-create 'Will not create non-existent files linked from SUMMARY.md'")
        .arg_from_usage("--curly-quotes 'Convert straight quotes to curly quotes, except for those that occur in code blocks and code spans'")
        .arg_from_usage("[dir] 'A directory for your book{n}(Defaults to Current Directory when omitted)'")
}