#!/usr/bin/env bash

config=$HOME/.config/mkprojrc
source $config
default=0
mainfile=main.cpp
gitfav=0
library=0
simple=0
usegitroot=0

usage() {
    echo "usage: $progname [-f|-l|-n|-s] [[-d] -g <gitroot>|-G] [-t <tplroot>] PROJECTNAME" >&2
    exit 1
}

msg() {
    echo "$progname:" "$@" >&2
}

die() {
    msg "$@"
    exit 1
}

check_gitroot() {
    [ -n "$gitroot" ] || die "please use --gitroot to specify a git url, used as prefix for all your repos"
}

progname=${0##*/}

# option processing, using silent mode
while getopts :dfGg:lnst:v opt
do
    case $opt in
        d)
            default=1
            ;;
        f)
            mainfile=filter.cpp
            ;;
        G)
            gitfav=1
            ;;
        g)
            gitroot=$OPTARG
            usegitroot=1
            ;;
        l)
            library=1
            ;;
        n)
            mainfile=main.cpp
            library=0
            simple=0
            ;;
        s)
            simple=1
            ;;
        t)
            tplroot=$OPTARG
            ;;
        v)
            echo "$progname version 2.0.0"
            exit 0
            ;;
        \?)
            msg "invalid option -$OPTARG"
            usage
            ;;
        :)
            msg "option -$OPTARG needs argument"
            usage
            ;;
    esac
done

# leave only file arguments
shift $(( OPTIND - 1 ))

[ $# -gt 0 ] || usage
[ -n "$tplroot" ] || die "no template root directory defined"

proj=${1//[- ]/_} # replace all spaces and dashes with underscores

if [ $default = 1 ]
then
    check_gitroot
    if grep -q gitroot $config
    then
        sed -i -e "s/^gitroot=.*$/gitroot=\"$gitroot\"" $config
    else
        printf 'gitroot="%s"\n' $gitroot >> $config
    fi
fi

if [ $gitfav = 1 ] || [ $usegitroot = 1 ]
then
    check_gitroot
    git clone "$gitroot/$proj.git" || die "not an existing repo: $proj"
else
    mkdir -p "$proj"
fi

if [ $simple = 1 ]
then
    cp $tplroot/Makefile.simple $proj/Makefile
    cp $tplroot/main.simple.cpp $proj/$proj.cpp
else
    mkdir -p $proj/src
    cp $tplroot/Makefile.unified $proj/Makefile
    cp $tplroot/precomp.hpp $proj/src
    cp -a $tplroot/tests $proj/
    uproj=$(echo $proj | tr '[:lower:]' '[:upper:]')
    sed -e "s/{PROJECT}/$proj/" -e "s/{PROJ}/$uproj/" $tplroot/version.hpp > $proj/src/version.hpp
    sed -e "s/{PROJECT}/$proj/" $tplroot/version.cpp > $proj/src/version.cpp

    if [ $library = 1 ]
    then
        mkdir -p $proj/man/man3
        sed -e "s/{PROJECT}/$proj/" $tplroot/lib.3 > $proj/man/man3/$proj.3
        cp $tplroot/premake.lib.make $proj/premake.make
    else
        mkdir -p $proj/man/man1
        sed -e "s/{PROJECT}/$proj/" $tplroot/tool.1 > $proj/man/man1/$proj.1
        cp $tplroot/premake.tool.make $proj/premake.make
        sed -e "s/{PROJECT}/$proj/" $tplroot/$mainfile > $proj/src/main.cpp
    fi
fi
sed -e "s/{PROJECT}/$proj/" $tplroot/gitignore > $proj/.gitignore

if [ ! -d .git ]
then
    cd $proj
    git init
    git add ./* .gitignore
    git commit -m 'First commit'
fi