#!/bin/bash
set -e

#
# Downloads AdoptOpenJDK Builds from
# https://pmd-code.org/openjdk/latest/jdk-11-linux64.tar.gz
# https://pmd-code.org/openjdk/latest/jdk-11-windows64.zip
# https://pmd-code.org/openjdk/latest/jdk-11-mac64.tar.gz
#
# The Build are originally from:
# https://github.com/AdoptOpenJDK/openjdk11-binaries/releases
#

source .travis/logger.sh
source .travis/common-functions.sh

# OPENJDK_VERSION e.g. "11"
OPENJDK_VERSION=$1
BASE_URL=https://pmd-code.org/openjdk/latest/jdk-${OPENJDK_VERSION}-

log_info "Installing OpenJDK${OPENJDK_VERSION} for ${TRAVIS_OS_NAME}"

if travis_isOSX; then
    DOWNLOAD_URL=${BASE_URL}mac64.tar.gz
    COMPONENTS_TO_STRIP=3 # e.g. jdk-11.0.3+7/Contents/Home/bin/java
elif travis_isWindows; then
    DOWNLOAD_URL=${BASE_URL}windows64.zip
else
    DOWNLOAD_URL=${BASE_URL}linux64.tar.gz
    COMPONENTS_TO_STRIP=1 # e.g. openjdk-11.0.3+7/bin/java
fi

OPENJDK_ARCHIVE=$(basename $DOWNLOAD_URL)

LOCAL_DIR=${HOME}/.cache/openjdk
TARGET_DIR=${HOME}/openjdk${OPENJDK_VERSION}

mkdir -p ${LOCAL_DIR}
mkdir -p ${TARGET_DIR}
if [ ! -e ${LOCAL_DIR}/${OPENJDK_ARCHIVE} ]; then
    log_info "Downloading from ${DOWNLOAD_URL} to ${LOCAL_DIR}"
    wget --directory-prefix ${LOCAL_DIR} --timestamping --continue ${DOWNLOAD_URL}
else
    log_info "Skipped download, file ${LOCAL_DIR}/${OPENJDK_ARCHIVE} already exists"
fi

log_info "Extracting to ${TARGET_DIR}"
if travis_isWindows; then
    7z x ${LOCAL_DIR}/${OPENJDK_ARCHIVE} -o${TARGET_DIR}
    mv ${TARGET_DIR}/*/* ${TARGET_DIR}/
else
    tar --extract --file ${LOCAL_DIR}/${OPENJDK_ARCHIVE} -C ${TARGET_DIR} --strip-components=${COMPONENTS_TO_STRIP}
fi

cat > ${HOME}/java.env <<EOF
export JAVA_HOME="${TARGET_DIR}"
export PATH="${TARGET_DIR}/bin:${PATH}"
java -version
EOF

log_info "OpenJDK can be used via ${HOME}/java.env"
cat ${HOME}/java.env
source ${HOME}/java.env