#!/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|-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##*/}

# argument normalizing; use colon for required arg,
# double colon for optional arg.
TEMP=$(getopt -o dfGg:lst:v --long default,filter,gitfav,gitroot,library,simple,tplroot,version -n "$progname" -- "$@")
[ $? -eq 0 ] || die "invalid arguments"
eval set -- "$TEMP"

# option processing
while true
do
    case "$1" in
        -d | --default ) default=1 ; shift ;;
        -f | --filter )  mainfile=filter.cpp ; shift ;;
        -G | --gitfav )  gitfav=1 ; shift ;;
        -g | --gitroot ) gitroot="$2" ; usegitroot=1 ; shift 2 ;;
        -l | --library ) library=1 ; shift ;;
        -s | --simple )  simple=1 ; shift ;;
        -t | --tplroot ) tplroot="$2" ; shift 2 ;;
        -v | --version ) echo "$progname version 2.0.0" ; exit 0 ;;
        -- )             shift ; break ;;
        * )              break ;;
    esac
done

[ $# -gt 0 ] || usage
[ -n "$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 -r $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