use cassiopeia::{meta, Cassiopeia};
use clap::{App, Arg, SubCommand};

fn main() {
    let cli = App::new(meta::NAME)
        .version(meta::VERSION)
        .about(meta::ABOUT)
        .after_help("To learn more on how to use cassiopeia, check out the documentation \
                     at https://git.spacekookie.de/kookienomicon/tree/apps/cassiopeia
If you want to report a bug, please do so on my mailing list: lists.sr.ht/~spacekookie/public-inbox")
        .author(meta::AUTHOR)
        .max_term_width(120)
        .setting(clap::AppSettings::SubcommandRequiredElseHelp)
        .global_settings(&[
            clap::AppSettings::DisableHelpSubcommand,
            clap::AppSettings::VersionlessSubcommands,
        ])
        .arg(
            Arg::with_name(meta::ARG_FILE)
                .short("f")
                .long("file")
                .help(meta::ARG_FILE_ABOUT)
                .default_value("./time.cass")
                .takes_value(true),
        )
        .subcommand(SubCommand::with_name(meta::CMD_UPDATE).about(meta::CMD_UPDATE_ABOUT))
        .subcommand(
            SubCommand::with_name(meta::CMD_START)
                .about(meta::CMD_START_ABOUT)
                .arg(Arg::with_name(meta::ARG_ROUNDING).short("r").long("no-round").help(meta::ARG_ROUNDING_ABOUT)),
        )
        .subcommand(
            SubCommand::with_name(meta::CMD_STOP)
                .about(meta::CMD_STOP_ABOUT)
                .arg(Arg::with_name(meta::ARG_ROUNDING).short("r").long("no-round").help(meta::ARG_ROUNDING_ABOUT)),
        )
        .subcommand(
            SubCommand::with_name(meta::CMD_INVOICE)
                .about(meta::CMD_INVOICE_ABOUT)
                .arg(
                    Arg::with_name(meta::ARG_CLIENT)
                        .short("c")
                        .long("client")
                        .takes_value(true)
                        .help(meta::ARG_CLIENT_ABOUT),
                )
                .arg(
                    Arg::with_name(meta::ARG_PROJECT)
                        .short("p")
                        .long("project")
                        .takes_value(true)
                        .help(meta::ARG_PROJECT_ABOUT),
                )
                .arg(
                    Arg::with_name(meta::ARG_GEN_YAML)
                        .short("g")
                        .long("gen")
                        .help(meta::ARG_GEN_YAML_ABOUT),
                )
                .arg(
                    Arg::with_name(meta::ARG_CLIENT_DB)
                        .long("client-db")
                        .takes_value(true)
                        .help(meta::ARG_CLIENT_DB_ABOUT),
                )
        )
        .subcommand(SubCommand::with_name(meta::CMD_STAT).about(meta::CMD_STAT_ABOUT))
        .get_matches();

    let cass_file = cli.value_of(meta::ARG_FILE).unwrap();
    let mut cass = match Cassiopeia::load(cass_file) {
        Some(cf) => cf,
        None => {
            eprintln!(
                "Invalid CASS file '{}'; file not found, or unparsable.",
                cass_file
            );
            std::process::exit(2);
        }
    };

    // Parse the matches generated by clap
    match cli.subcommand() {
        ("start", Some(ops)) => {
            // This parameter turns rounding OFF
            let round = ops.is_present(meta::ARG_ROUNDING);
            match cass.start(!round) {
                Some(()) => println!("Started session!"),
                None => {
                    eprintln!("Failed to start session...");
                    std::process::exit(1);
                }
            }
        }
        ("stop", Some(ops)) => {
            // This parameter turns rounding OFF
            let round = ops.is_present(meta::ARG_ROUNDING);
            match cass.stop(!round) {
                Some(()) => println!("Stopped session!"),
                None => {
                    eprintln!("Failed to stop session...");
                    std::process::exit(1);
                }
            }
        }
        ("invoice", _) => {
            println!("Invoice command only partially implemented! No generation is supported");
            match cass.invoice().run() {
                Some(()) => println!("Added INVOICE block"),
                None => {
                    eprintln!("Failed to add INVOICE block...");
                    std::process::exit(1);
                }
            }
        }
        ("update", _) => match cass.update() {
            Some(()) => println!("Updated file to new version: {}", meta::VERSION),
            None => {
                eprintln!("Failed to update file...");
                std::process::exit(1);
            }
        },
        (meta::CMD_STAT, _) => match cass.stat() {
            Some(s) => println!("{}", s),
            None => {
                eprintln!("Failed to collect time statistics...");
                std::process::exit(1);
            }
        },
        (_, _) => todo!(),
    }
}