use anyhow::Context;

use clap::{CommandFactory, Parser};

use clap_complete::{Shell, generate};

use roowho2_lib::server::varlink_api::VarlinkFingerClientProxy;

/// User information lookup program

///

/// The `finger` utility displays information about the system users.

///

///

/// If no options are specified, finger defaults to the -l style output if operands are provided, otherwise to the -s style.

/// Note that some fields may be missing, in either format, if information is not available for them.

///

/// If no arguments are specified, finger will print an entry for each user currently logged into the system.

///

/// Finger may be used to look up users on a remote machine.

/// The format is to specify a user as “user@host”, or “@host”,

/// where the default output format for the former is the -l style,

/// and the default output format for the latter is the -s style.

/// The -l option is the only option that may be passed to a remote machine.

///

/// If standard output is a socket, finger will emit a carriage return (^M) before every linefeed (^J).

/// This is for processing remote finger requests when invoked by the daemon.

#[derive(Debug, Parser)]

#[command(

    author = "Programvareverkstedet <projects@pvv.ntnu.no>",

    about,

    version

)]

pub struct Args {

    /// Forces finger to use IPv4 addresses only.

    #[arg(long, short = '4', conflicts_with = "ipv6")]

    ipv4: bool,

    /// Forces finger to use IPv6 addresses only.

    #[arg(long, short = '6', conflicts_with = "ipv4")]

    ipv6: bool,

    /// Display the user's login name, real name, terminal name and write status

    /// (as a ``*'' before the terminal name if write permission is denied),

    /// idle time, login time, and either office location and office phone number,

    /// or the remote host. If -o is given, the office location and office phone number

    /// is printed (the default). If -h is given, the remote host is printed instead.

    ///

    /// Idle time is in minutes if it is a single integer, hours and minutes if a ``:''

    /// is present, or days if a ``d'' is present. If it is an "*", the login time indicates

    /// the time of last login. Login time is displayed as the day name if less than 6 days,

    /// else month, day; hours and minutes, unless more than six months ago, in which case the year

    /// is displayed rather than the hours and minutes.

    ///

    /// Unknown devices as well as nonexistent idle and login times are displayed as single asterisks.

    #[arg(long, short, conflicts_with = "long")]

    short: bool,

    /// When used in conjunction with the -s option, the name of the remote host

    /// is displayed instead of the office location and office phone.

    #[arg(long, short = 'H', requires = "short", conflicts_with = "office")]

    host: bool,

    /// When used in conjunction with the -s option, the office location and

    /// office phone information is displayed instead of the name of the remote host.

    #[arg(long, short, requires = "short", conflicts_with = "host")]

    office: bool,

    /// This option restricts the gecos output to only the users' real name.

    /// It also has the side-effect of restricting the output of the remote host

    /// when used in conjunction with the -h option.

    #[arg(long, short, requires = "short")]

    gecos: bool,

    /// Disable all use of the user accounting database.

    #[arg(short = 'k')]

    no_acct: bool,

    /// Produce a multi-line format displaying all of the information

    /// described for the -s option as well as the user's home directory,

    /// home phone number, login shell, mail status, and the contents of

    /// the files .forward, .plan, .project and .pubkey from the user's home directory.

    ///

    /// If idle time is at least a minute and less than a day, it is presented in the form ``hh:mm''.

    /// Idle times greater than a day are presented as ``d day[s]hh:mm''

    ///

    /// Phone numbers specified as eleven digits are printed as ``+N-NNN-NNN-NNNN''.

    /// Numbers specified as ten or seven digits are printed as the appropriate subset of that string.

    /// Numbers specified as five digits are printed as ``xN-NNNN''.

    /// Numbers specified as four digits are printed as ``xNNNN''.

    ///

    /// If write permission is denied to the device, the phrase ``(messages off)''

    /// is appended to the line containing the device name. One entry per user is displayed with the -l option;

    /// if a user is logged on multiple times, terminal information is repeated once per login.

    ///

    /// Mail status is shown as ``No Mail.'' if there is no mail at all,

    /// ``Mail last read DDD MMM ## HH:MM YYYY (TZ)'' if the person has looked at their mailbox since new mail arriving,

    /// or ``New mail received ...'', ``Unread since ...'' if they have new mail.

    #[arg(long, short, conflicts_with = "short")]

    long: bool,

    /// Prevent the -l option of finger from displaying the contents of

    /// the .forward, .plan, .project and .pubkey files.

    #[arg(long, short, requires = "long")]

    prevent_files: bool,

    /// Prevent matching of user names. User is usually a login name;

    /// however, matching will also be done on the users' real names,

    /// unless the -m option is supplied. All name matching performed by finger is case insensitive.

    #[arg(long, short = 'm')]

    no_name_match: bool,

    /// Output in JSON format

    #[arg(long, short)]

    json: bool,

    /// Generate shell completion scripts for the specified shell

    /// and print them to stdout.

    #[arg(long, value_enum, hide = true)]

    completions: Option<Shell>,

    users: Vec<String>,

}

#[tokio::main]