#! /bin/sh

function help() {
    echo "${0##*/} [dtcu] "
    echo -e "\t-d --git-dir         set GIT_DIR"
    echo -e "\t-t --tasks-dir       set TASKS_DIR"
    echo -e "\t-c --no-create       set NO_CREATE"
    echo -e "\t-u --force-update    set FORCE_UPDATE"
    exit 0
}

for arg in $@; do
    option=`echo "'$arg'" | cut -d'=' -f1 | tr -d "'"`
    value=`echo "'$arg'" | cut -d'=' -f2- | tr -d "'"`
    if [ "$value" == "$option" ]; then value=""; fi
    case "$option" in
        -d|--git-dir) GIT_DIR=$value;;
        -t|--tasks-dir) TASKS_DIR=$value;;
        -c|--no-create) NO_CREATE=1;;
        -u|--force-update) FORCE_UPDATE=1;;
        -h|--help) help;;
    esac
done

GIT_DIR=${GIT_DIR:-$HOME/usr/git}
TASKS_DIR=${TASKS_DIR:-$GIT_DIR/templates/ruby-gem/tasks}
DIFF_OPTS=${DIFF_OPTS:--y --suppress-common-lines}
NO_CREATE=${NO_CREATE:-0}
FORCE_UPDATE=${ORCE_UPDATE:-0}

RESET="\033[0m"
RED="\033[0;31m"
GREEN="\033[0;32m"
BROWN="\033[0;33m"
PURPLE="\033[0;35m"
CYAN="\033[0;36m"
YELLOW="\033[1;33m"

function copy() {
    echo -e "  copy ${PURPLE}${1}${RESET} into ${CYAN}${2}${RESET}" && cp ${1} ${2}
}

function update() {
    if [ $FORCE_UPDATE -eq 1 ]; then
        echo -n -e "\n${RED}${1}${RESET} :  " && copy ${2} ${3}
    else
        echo -e "\n${RED}${1}${RESET} :  ${PURPLE}${2} ${CYAN}${3}${RESET} differs ..."
        diff ${DIFF_OPTS} ${3} ${2}
        read -p "  update it? [yN]" RET
        if [ "${RET}" = "Y" -o "${RET}" = "y" ]; then
            copy ${2} ${3}
        fi
    fi
}

function create() {
    echo -e "\n${RED}${1}${RESET} : ${CYAN}${3}${RESET} does not exists"
    read -p "  create it? [yN]" RET
    if [ "${RET}" = "Y" -o "${RET}" = "y" ]; then
        copy ${2} ${3}
    fi
}

echo -e "task dir:${YELLOW}${TASKS_DIR}${RESET}"
for gitdir in ${GIT_DIR}; do
    echo -e "enter ${BROWN}${gitdir}${RESET}" && cd ${gitdir} || return 1
    for dir in $(ls -1); do
        [ -d ${dir} ] && [ -e ${dir}/tasks/gem.rake ] || continue
        # SEARCH REMOTE
        echo -e "  enter ${BROWN}${dir}${RESET}" && cd $dir || exit 1
        for task_file in ${TASKS_DIR}/*; do
            dest="./tasks/${task_file##*/}"
            if [ -e $dest ]; then
                cmp -s ${task_file} ${dest} || update ${dir} ${task_file} ${dest}
            elif [ $NO_CREATE -eq 0 ];then
                create ${dir} ${task_file} ${dest}
            fi
        done
        echo -e "  leave ${BROWN}${dir}${RESET}\n" && cd .. || exit 1
    done
    echo -e "leave ${BROWN}${gitdir}${RESET}"
done