// This file is a part of primstav.
// Copyright (C) 2018  Harald Eilertsen <haraldei@anduin.net>
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU 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 General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <https://www.gnu.org/licenses/>.

#![allow(dead_code)]

use chrono::Datelike;

pub struct Locale {
    weekdays: [&'static str; 7],
    months: [&'static str; 12],
}

impl Locale {
    pub fn format_date(&self, d: &chrono::NaiveDate) -> String {
        format!("{} {}. {}, {}",
            self.weekdays[d.weekday() as usize - 1],
            d.day(),
            self.months[d.month() as usize - 1],
            d.year())
    }
}

fn from_locale_str(l: &str) -> &'static Locale {
    match &l[0..2] {
        "nb" => &NB,
        "nn" => &NN,
        _ => &EN,           // Return default EN locale if we don't have a locale for the given str.
    }
}

pub fn get() -> &'static Locale {
    match std::env::var("LC_TIME") {
        Ok(l) => {
            from_locale_str(&l)
        },
        Err(_) => &EN,      // Return default EN locale if no locale is defined
    }
}

pub const EN: Locale = Locale {
    weekdays: ["monday", "tuesday", "wednesday", "thursday", "friday", "saturday", "sunday"],
    months: ["january", "february", "march", "april", "may", "june", "july", "august", "september", "october", "november", "december"],
};

pub const NB: Locale = Locale {
    weekdays: ["mandag", "tirsdag", "onsdag", "torsdag", "fredag", "lørdag", "søndag"],
    months: ["januar", "februar", "mars", "april", "mai", "juni", "juli", "august", "september", "oktober", "november", "desember"],
};

pub const NN: Locale = Locale {
    weekdays: ["måndag", "tysdag", "onsdag", "torsdag", "fredag", "laurdag", "søndag"],
    months: ["januar", "februar", "mars", "april", "mai", "juni", "juli", "august", "september", "oktober", "november", "desember"],
};