#!/bin/bash

# Init
pushd . > /dev/null
cd "$(dirname "$0")/.."
mkdir install_cache >/dev/null 2>&1
cd install_cache || exit 1
TMP_DIR="$(mktemp -d 2>/dev/null || mktemp -d -t 'wktmp')"

# Functions
## code heavily borrowed from macapps.link
getApp() {
    if [ -f "$1" ]; then
        echo $'\360\237\214\200  - ['$2'] Copying app...'
        cp -n "$1" "$2"
    else
        echo $'\360\237\214\200  - ['$2'] Downloading app...'
        curl "$1" -L -R -f -s -o "$2" -z "$2"
    fi
}

versionChecker() {
	local v1=$1
    local v2=$2
	while [ `echo $v1 | egrep -c [^0123456789.]` -gt 0 ]; do
		char=`echo $v1 | sed 's/.*\([^0123456789.]\).*/\1/'`
        char_dec=`echo -n "$char" | od -b | head -1 | awk {'print $2'}`
        v1=`echo $v1 | sed "s/$char/.$char_dec/g"`
    done
	while [ `echo $v2 | egrep -c [^0123456789.]` -gt 0 ]; do
		char=`echo $v2 | sed 's/.*\([^0123456789.]\).*/\1/'`
        char_dec=`echo -n "$char" | od -b | head -1 | awk {'print $2'}`
        v2=`echo $v2 | sed "s/$char/.$char_dec/g"`
    done
	v1=`echo $v1 | sed 's/\.\./.0/g'`
    v2=`echo $v2 | sed 's/\.\./.0/g'`
	checkVersion "$v1" "$v2"
}

checkVersion() {
    [ "$1" == "$2" ] && return 1
    v1f=`echo $1 | cut -d "." -f -1`
    v1b=`echo $1 | cut -d "." -f 2-`
    v2f=`echo $2 | cut -d "." -f -1`
    v2b=`echo $2 | cut -d "." -f 2-`
    if [[ "$v1f" != "$1" ]] || [[ "$v2f" != "$2" ]]; then
        [[ "$v1f" -gt "$v2f" ]] && return 1
        [[ "$v1f" -lt "$v2f" ]] && return 0
        [[ "$v1f" == "$1" ]] || [[ -z "$v1b" ]] && v1b=0
        [[ "$v2f" == "$2" ]] || [[ -z "$v2b" ]] && v2b=0
        checkVersion "$v1b" "$v2b"
        return $?
    else
        [ "$1" -gt "$2" ] && return 1 || return 0
    fi
}

appStatus() {
    if [ ! -d "/Applications/$1" ]; then
        echo "uninstalled"
    else
        if [[ $5 == "build" ]]; then
            BUNDLE="CFBundleVersion"
        else
            BUNDLE="CFBundleShortVersionString"
        fi
        INSTALLED=`/usr/libexec/plistbuddy -c Print:$BUNDLE: "/Applications/$1/Contents/Info.plist"`
        if [ $4 == "dmg" ]; then
            COMPARETO=`/usr/libexec/plistbuddy -c Print:$BUNDLE: "/Volumes/$2/$1/Contents/Info.plist"`
        elif [[ $4 == "zip" || $4 == "tar" ]]; then
            COMPARETO=`/usr/libexec/plistbuddy -c Print:$BUNDLE: "$3$1/Contents/Info.plist"`
        fi
        checkVersion "$INSTALLED" "$COMPARETO"
        UPDATED=$?
        if [[ $UPDATED == 1 ]]; then
            echo "updated"
        else
            echo "outdated"
        fi
    fi
}

installApp() {
    getApp "$4" "$2.$1"
    cp "$2.$1" "$TMP_DIR/"
    pushd "$TMP_DIR" >/dev/null
    if [ $1 == "dmg" ]; then
        yes | hdiutil mount -nobrowse "$2.dmg" -mountpoint "/Volumes/$2" > /dev/null
        install_status="$(appStatus "$3" "$2" "" "dmg" "$7")"
        if [[ "$install_status" == "updated" ]]; then
            echo $'\342\235\214  - ['$2'] Skipped because it was already up to date!'
        elif [[ "$install_status" == "outdated" && $6 != "noupdate" ]]; then
            ditto "/Volumes/$2/$3" "/Applications/$3"
            echo $'\360\237\214\216  - ['$2'] Successfully updated!'
        elif [[ "$install_status" == "outdated" && $6 == "noupdate" ]]; then
            echo $'\342\235\214  - ['$2'] This app cant be updated!'
        elif [[ "$install_status" == "uninstalled" ]]; then
            cp -R "/Volumes/$2/$3" /Applications
            echo $'\360\237\221\215  - ['$2'] Succesfully installed!'
        fi
        hdiutil unmount "/Volumes/$2" > /dev/null
    elif [ $1 == "zip" ]; then
        unzip -qq "$2.zip"
        install_status="$(appStatus "$3" "" "$5" "zip" "$7")"
        if [[ "$install_status" == "updated" ]]; then
            echo $'\342\235\214  - ['$2'] Skipped because it was already up to date!'
        elif [[ "$install_status" == "outdated" && $6 != "noupdate" ]]; then
            ditto "$5$3" "/Applications/$3"
            echo $'\360\237\214\216  - ['$2'] Successfully updated!'
        elif [[ "$install_status" == "outdated" && $6 == "noupdate" ]]; then
            echo $'\342\235\214  - ['$2'] This app cant be updated!'
        elif [[ "$install_status" == "uninstalled" ]]; then
            mv "$5$3" /Applications
            echo $'\360\237\221\215  - ['$2'] Succesfully installed!'
        fi
        rm -rf "$2.zip" && rm -rf "$5" && rm -rf "$3"
    elif [[ $1 == "tar" || $1 == "tbz" || $1 == "tgz" || $1 == "txz" ]]; then
        tar -zxf "$2.$1" > /dev/null;
        install_status="$(appStatus "$3" "" "$5" "tar" "$7")"
        if [[ "$install_status" == "updated" ]]; then
            echo $'\342\235\214  - ['$2'] Skipped because it was already up to date!'
        elif [[ "$install_status" == "outdated" && $6 != "noupdate" ]]; then
            ditto "$3" "/Applications/$3"
            echo $'\360\237\214\216  - ['$2'] Successfully updated!'
        elif [[ "$install_status" == "outdated" && $6 == "noupdate" ]]; then
            echo $'\342\235\214  - ['$2'] This app cant be updated!'
        elif [[ "$install_status" == "uninstalled" ]]; then
            mv "$5$3" /Applications
            echo $'\360\237\221\215  - ['$2'] Succesfully installed!'
        fi
        rm -rf "$2.$1" && rm -rf "$3"
    fi
    popd > /dev/null
}

# Install App
installApp "$@"

# Done
rm -R "$TMP_DIR"