use std::{fs, env};
use chrono::{Datelike, Timelike, Local};
use rust_utils::utils::run_command;

const MONTHS: [&str; 12] = [
    "January",
    "February",
    "March",
    "April",
    "May",
    "June",
    "July",
    "August",
    "September",
    "October",
    "November",
    "December"
];

const VERSION: &str = env!("CARGO_PKG_VERSION");

fn main() {
    println!("cargo:rerun-if-changed=build.rs");
    let icon_dir = match fs::read_dir("/storage/emulated/0") {
        Ok(_) => format!("{}/share/the_rock/icon.png", env::var("PREFIX").unwrap()),
        Err(_) => "/usr/share/the_rock/icon.png".to_string()
    };
    let date = Local::now().date_naive();
    let month = MONTHS[date.month() as usize - 1];
    let day = date.day();
    let year = date.year();
    let date_str = format!("{day} {month} {year}");
    let time = Local::now().time();
    let hour = time.hour();
    let minute = time.minute();
    let second = time.second();
    let time_str = format!("{hour:02}:{minute:02}:{second:02}");

    let desktop_file = format!(
        "[Desktop Entry]\n\
        Version={VERSION}\n\
        Type=Application\n\
        Name=The Rock\n\
        Comment=Command line King James bible viewer\n\
        Exec=the_rock\n\
        Icon={icon_dir}\n\
        Terminal=true\n\
        StartupNotify=false\n\
        Categories=Utility;"
    );

    let the_rock_manpage = format!(
        ".\\\" Manpage for The Rock.\n\
        .\\\" Created on {month} {day}, {year} at {time_str}\n\
        .TH the_rock 1 \"{date_str}\" \"{VERSION}\" \"the_rock man page\"\n\
        .SH NAME\n\
        The Rock \\- Command line King James bible viewer\n\
        .SH DESCRIPTION\n\
        the_rock [chapter]\n\
        .br\n\
        The Rock is a command line program to view the King James version of the bible\n\
        .SH OPTIONS\n\
        If you specify a specific chapter as an argument, or if none are specified, The Rock will open the last chapter it closed on, or it will open Genesis 1\n\
        .br\n\
        Pass --reset-tabs to close all open chapter tabs\n\
        .SH SEE ALSO\n\
        bible(1)\n\
        .SH AUTHOR\n\
        Noah Jelen (noahtjelen@gmail.com)"
    );

    let bible_manpage = format!(
        ".\\\" Manpage for bible (part of The Rock).\n\
        .\\\" Created on {month} {day}, {year} at {time_str}\n\
        .TH bible 1 \"{date_str}\" \"{VERSION}\" \"bible man page\"\n\
        .SH NAME\n\
        bible \\- King James bible verse reference utility\n\
        .SH SYNOPSIS\n\
        bible <verse>\n\
        .br\n\
        bible -p <verse>\n\
        .br\n\
        bible -c <chapter>\n\
        .br\n\
        bible -s <search term>\n\
        .br\n\
        bible <passage>\n\
        .br\n\
        biblr -t <topic>\n\
        .br\n\
        bible [verse or passage][,verse or passage,verse or passage...]\n\
        .SH DESCRIPTION\n\
        bible is the command line interface of The Rock.\n\
        .SH OPTIONS\n\
        If no options are specifed, bible will just show Genesis 1:1\n\
        Use -v to show current version\n\
        .br\n\
        Use -h to show the help message\n\
        .br\n\
        Use -p <passage> to show the passage as a paragraph instead of verse list\n\
        .br\n\
        Use -c <book number><chapter number> to show an entire chapter\n\
        .br\n\
        Use -s <word> to find all instances of a specific word\n\
        .SH EXAMPLES\n\
        bible Mark9:23\n\
        .br\n\
        bible matt24:4-14\n\
        .br\n\
        bible isa40:31,matt6:9-13,Genesis1\n\
        .br\n\
        bible -p matt24:4-14\n\
        .br\n\
        bible -c genesis1\n\
        .br\n\
        bible -cp exodus20\n\
        .SH SEE ALSO\n\
        the_rock(1)\n\
        .SH AUTHOR\n\
        Noah Jelen (noahtjelen@gmail.com)"
    );

    fs::remove_file("man/bible.1").unwrap_or(());
    fs::remove_file("man/the_rock.1").unwrap_or(());
    fs::remove_file("the_rock.desktop").unwrap_or(());
    fs::remove_dir("man/").unwrap_or(());
    fs::create_dir("man/").unwrap();
    fs::write("man/bible.1", bible_manpage).unwrap();
    fs::write("man/the_rock.1", the_rock_manpage).unwrap();
    fs::write("the_rock.desktop", desktop_file).unwrap();

    if env::set_current_dir("aur/").is_ok() {
        let aur_pkgbuild = format!(
            "# Maintainer: Noah Jelen <noahtjelen@gmail.com>\n\
            # Generated by cargo on {month} {day}, {year} at {time_str}\n\
            pkgname=the-rock\n\
            pkgver={VERSION}\n\
            pkgrel=1\n\
            pkgdesc=\"A command line King James bible viewer\"\n\
            arch=('i686' 'x86_64')\n\
            url=\"https://gitlab.com/NoahJelen/the-rock\"\n\
            license=('GPL3')\n\
            depends=('ncurses' 'gcc-libs' 'glibc')\n\
            makedepends=('cargo')\n\
            source=(\"https://gitlab.com/NoahJelen/the-rock/-/archive/$pkgver/the-rock-$pkgver.zip\")\n\
            conflicts=('the-rock-git' 'bible-kjv')\n\
            md5sums=('SKIP')\n\n\
            build() {{\n    \
                cd \"the-rock-$pkgver\"\n    \
                cargo build --release\n    \
                cd target/release\n    \
                ln -sf the_rock bible\n\
            }}\n\n\
            package() {{\n    \
                cd \"the-rock-$pkgver\"\n    \
                mkdir -p \"$pkgdir/usr/share/the_rock\"\n    \
                mkdir -p \"$pkgdir/usr/share/man/man1/\"\n    \
                install -Dt \"$pkgdir/usr/bin\" -m755 target/release/the_rock\n    \
                install -Dt \"$pkgdir/usr/bin\" -m755 target/release/bible\n    \
                install -Dt \"$pkgdir/usr/share/the_rock/\" bible.rawtext\n    \
                install -Dt \"$pkgdir/usr/share/applications/\" the_rock.desktop\n    \
                install -Dt \"$pkgdir/usr/share/the_rock/\" icon.png\n    \
                install -Dt \"$pkgdir/usr/share/man/man1\" man/the_rock.1\n    \
                install -Dt \"$pkgdir/usr/share/man/man1\" man/bible.1\n\
            }}"
        );
        fs::remove_file("PKGBUILD").unwrap_or(());
        fs::write("PKGBUILD", aur_pkgbuild).unwrap_or(());

        // use makepkg to generate a .SRCINFO file from the aur pkgbuild
        let cmd = run_command("makepkg", false, ["--printsrcinfo"]);
        fs::write(".SRCINFO", cmd.output).unwrap();
    }
}