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/*
==--==--==--==--==--==--==--==--==--==--==--==--==--==--==--==--

CLD

Copyright (C) 2019-2023  Anonymous

There are several releases over multiple years,
they are listed as ranges, such as: "2019-2023".

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License
along with this program.  If not, see <https://www.gnu.org/licenses/>.

::--::--::--::--::--::--::--::--::--::--::--::--::--::--::--::--
*/

//! # Command line duration
//!
//! ## Project
//!
//! - License: GNU Lesser General Public License, either version 3, or (at your option) any later version.
//! - _This project follows [Semantic Versioning 2.0.0]_
//!
//! ## Features
//!
//! This project helps parse [`Duration`][core::time/Duration] from command line arguments.
//!
//! ## Notes
//!
//! Documentation is built with all features. Some of them are optional. If you see components from other crates, you can view source to see
//! what features are required.
//!
//! [Semantic Versioning 2.0.0]: https://semver.org/spec/v2.0.0.html
//! [core::time/Duration]: https://doc.rust-lang.org/core/time/struct.Duration.html

#![warn(missing_docs)]
#![no_std]
#![forbid(unsafe_code)]

// ╔═════════════════╗
// ║   IDENTIFIERS   ║
// ╚═════════════════╝

macro_rules! code_name  { () => { "cld" }}
macro_rules! version    { () => { "0.5.1" }}

/// # Crate name
pub const NAME: &str = "CLD";

/// # Crate code name
pub const CODE_NAME: &str = code_name!();

/// # ID of this crate
pub const ID: &str = concat!(
    "2cf37bc5-bfd0f66b-7cbf8382-4eb3e3cb-d2a9e255-ef4858eb-07c2ffe7-0e0b66a7-",
    "b29673a3-386a6335-9bf7dc3b-faad33d9-76db4b61-57f6a606-da001cbb-8ba95a71",
);

/// # Crate version
pub const VERSION: &str = version!();

/// # Crate release date (year/month/day)
pub const RELEASE_DATE: (u16, u8, u8) = (2023, 2, 22);

/// # Tag, which can be used for logging...
pub const TAG: &str = concat!(code_name!(), "::2cf37bc5::", version!());

// ╔════════════════════╗
// ║   IMPLEMENTATION   ║
// ╚════════════════════╝

#[macro_use]
extern crate alloc;

#[cfg(feature="std")]
extern crate std;

/// # Makes new Error...
macro_rules! err {
    () => {
        $crate::Error::new(line!(), module_path!(), None)
    };
    ($s: literal) => {
        $crate::Error::new(line!(), module_path!(), Some(alloc::borrow::Cow::Borrowed($s)))
    };
    ($s: literal, $($arg: tt)+) => {
        $crate::Error::new(line!(), module_path!(), Some(alloc::borrow::Cow::Owned(alloc::format!($s, $($arg)+))))
    };
    ($expr: expr, $err: expr) => {
        $expr.ok_or_else(|| $err)
    };
}

/// # Makes new Error...
#[allow(unused_macros)]
macro_rules! err_from {
    ($($s: tt)+) => {
        $crate::Error::new(line!(), module_path!(), Some(alloc::borrow::Cow::Borrowed(concat!($($s)+))))
    };
}

/// # Maps Error...
macro_rules! map_err {
    ($e: expr) => {
        $e.map_err(|e| err!("{}", e))
    };
    ($expr: expr, $err: expr) => {
        $expr.map_err(|_| $err)
    };
}

#[test]
fn test_macro_err() {
    use alloc::borrow::Cow;

    macro_rules! s_test { () => { "test" }}

    fn eq(first: Error, second: Error) -> bool {
        first.line() == second.line() && first.module_path() == second.module_path() && first.msg() == second.msg()
    }

    assert!(eq(err!(), Error::new(line!(), module_path!(), None)));
    assert!(eq(err!("test"), Error::new(line!(), module_path!(), Some(Cow::Borrowed(s_test!())))));
    assert!(eq(err!("{s:?}", s=s_test!()), Error::new(line!(), module_path!(), Some(Cow::Owned(alloc::format!("{:?}", s_test!()))))));

    assert!(eq(err_from!(s_test!(), s_test!()), Error::new(line!(), module_path!(), Some(Cow::Borrowed(concat!(s_test!(), s_test!()))))));
    assert!(eq(err_from!("test"), map_err!(core::result::Result::<(), _>::Err(s_test!())).unwrap_err()));
    assert!(eq(err_from!("test", "test"), Error::new(line!(), module_path!(), Some(Cow::Owned(s_test!().repeat(2))))));
}

pub mod version_info;

mod cld;
mod error;

pub use self::{
    cld::*,
    error::*,
};

/// # Result type used in this crate
pub type Result<T> = core::result::Result<T, Error>;

#[test]
fn test_crate_version() {
    assert_eq!(VERSION, env!("CARGO_PKG_VERSION"));
}