#!/usr/bin/env bash

# get base dir regardless of execution location
SOURCE="${BASH_SOURCE[0]}"
while [ -h "$SOURCE" ]; do # resolve $SOURCE until the file is no longer a symlink
    DIR="$( cd -P "$( dirname "$SOURCE" )" && pwd )"
    SOURCE="$(readlink "$SOURCE")"
    [[ "$SOURCE" != /* ]] && SOURCE="$DIR/$SOURCE" # if $SOURCE was a relative symlink, we need to resolve it relative to the path where the symlink file was located
done
SOURCE=$([[ "$SOURCE" = /* ]] && echo "$SOURCE" || echo "$PWD/${SOURCE#./}")
basedir=$(dirname "$SOURCE")

PS1="$"
workdir="$basedir/work"
minecraftversion="$(cat BuildData/info.json | grep minecraftVersion | cut -d '"' -f 4)"
minecrafthash="$(cat BuildData/info.json | grep minecraftHash | cut -d '"' -f 4)"
accesstransforms="BuildData/mappings/$(cat BuildData/info.json | grep accessTransforms | cut -d '"' -f 4)"
classmappings="BuildData/mappings/$(cat BuildData/info.json | grep classMappings | cut -d '"' -f 4)"
membermappings="BuildData/mappings/$(cat BuildData/info.json | grep memberMappings | cut -d '"' -f 4)"
packagemappings="BuildData/mappings/$(cat BuildData/info.json | grep packageMappings | cut -d '"' -f 4)"
jarpath="$workdir/$minecraftversion/$minecraftversion"

echo "Downloading unmapped vanilla jar..."
if [ ! -f  "$jarpath.jar" ]; then
    mkdir -p "$workdir/$minecraftversion"
    curl -s -o "$jarpath.jar" "https://launcher.mojang.com/v1/objects/5fafba3f58c40dc51b5c3ca72a98f62dfdae1db7/server.jar"
    if [ "$?" != "0" ]; then
        echo "Failed to download the vanilla server jar. Check connectivity or try again later."
        exit 1
    fi
fi

# OS X doesn't have md5sum, just md5 -r
if [[ "$OSTYPE" == "darwin"* ]]; then
   shopt -s expand_aliases
   alias md5sum='md5 -r'
   echo "Using an alias for md5sum on OS X"
fi

checksum="$(md5sum "$jarpath.jar" | cut -d ' ' -f 1)"
if [ "$checksum" != "$minecrafthash" ]; then
    echo "The MD5 checksum of the downloaded server jar does not match the BuildData hash."
    exit 1
fi

echo "Applying class mappings..."
if [ ! -f "$jarpath-cl.jar" ]; then
    java -jar BuildData/bin/SpecialSource-2.jar map -i "$jarpath.jar" -m "$classmappings" -o "$jarpath-cl.jar" 1>/dev/null
    if [ "$?" != "0" ]; then
        echo "Failed to apply class mappings."
        exit 1
    fi
fi

echo "Applying member mappings..."
if [ ! -f "$jarpath-m.jar" ]; then
    java -jar BuildData/bin/SpecialSource-2.jar map -i "$jarpath-cl.jar" -m "$membermappings" -o "$jarpath-m.jar" 1>/dev/null
    if [ "$?" != "0" ]; then
        echo "Failed to apply member mappings."
        exit 1
    fi
fi

echo "Creating remapped jar..."
if [ ! -f "$jarpath-mapped.jar" ]; then
    java -jar BuildData/bin/SpecialSource.jar --kill-lvt -i "$jarpath-m.jar" --access-transformer "$accesstransforms" -m "$packagemappings" -o "$jarpath-mapped.jar" 1>/dev/null
    if [ "$?" != "0" ]; then
        echo "Failed to create remapped jar."
        exit 1
    fi
fi

echo "Installing remapped jar..."
cd CraftBukkit # Need to be in a directory with a valid POM at the time of install.
mvn --batch-mode install:install-file -q -Dfile="$jarpath-mapped.jar" -Dpackaging=jar -DgroupId=org.spigotmc -DartifactId=minecraft-server -Dversion="$minecraftversion-SNAPSHOT"
if [ "$?" != "0" ]; then
    echo "Failed to install remapped jar."
    exit 1
fi