#!/usr/bin/env bash
set -e

if [[ -z "${VERBOSE// }" ]] || [ "$VERBOSE" -ne "$VERBOSE" ] 2>/dev/null; then
	VERBOSE=0
fi

Log()
{
	if [ $VERBOSE -ge $1 ]; then
		echo ${@:2}
	fi
}

Inform()
{
	Log 1 -e "\x1B[0;34m$@\x1B[m"
}

Debug()
{
	Log 2 -e "\x1B[0;32m$@\x1B[m"
}

Error()
{
	>&2 Log 0 -e "\x1B[0;31m$@\x1B[m"
}

Fetch()
{
	URL=$1
	FILE=$2
	PROGRESS=$3
	if [ $VERBOSE -ge 1 ] && [ $PROGRESS ]; then
		CURL_OPT="--progress-bar"
	else
		CURL_OPT="--silent"
	fi
	curl $CURL_OPT $URL > $FILE
}

hash curl 2> /dev/null || { Error "Require 'curl' Aborting."; exit 1; }
hash xmllint 2> /dev/null || { Error "Require 'xmllint' Aborting."; exit 1; }
hash sha256sum 2> /dev/null || { Error "Require 'sha256sum' Aborting."; exit 1; }

TMPDIR=$1
if [ ! -d $TMPDIR ]; then
	TMPDIR=./tizen_tmp
	Debug "Create temporary directory : $TMPDIR"
	mkdir -p $TMPDIR 
fi

TIZEN_URL=http://download.tizen.org/snapshots/tizen
BUILD_XML=build.xml
REPOMD_XML=repomd.xml
PRIMARY_XML=primary.xml
TARGET_URL="http://__not_initialized"

Xpath_get()
{
	XPATH_RESULT=''
	XPATH=$1
	XML_FILE=$2
	RESULT=$(xmllint --xpath $XPATH $XML_FILE)
	if [[ -z ${RESULT// } ]]; then
		Error "Can not find target from $XML_FILE"
		Debug "Xpath = $XPATH"
		exit 1
	fi
	XPATH_RESULT=$RESULT
}

fetch_tizen_pkgs_init()
{
	TARGET=$1
	PROFILE=$2
	Debug "Initialize TARGET=$TARGET, PROFILE=$PROFILE"

	TMP_PKG_DIR=$TMPDIR/tizen_${PROFILE}_pkgs
	if [ -d $TMP_PKG_DIR ]; then rm -rf $TMP_PKG_DIR; fi
	mkdir -p $TMP_PKG_DIR

	PKG_URL=$TIZEN_URL/$PROFILE/latest

	BUILD_XML_URL=$PKG_URL/$BUILD_XML
	TMP_BUILD=$TMP_PKG_DIR/$BUILD_XML
	TMP_REPOMD=$TMP_PKG_DIR/$REPOMD_XML
	TMP_PRIMARY=$TMP_PKG_DIR/$PRIMARY_XML
	TMP_PRIMARYGZ=${TMP_PRIMARY}.gz

	Fetch $BUILD_XML_URL $TMP_BUILD

	Debug "fetch $BUILD_XML_URL to $TMP_BUILD"

	TARGET_XPATH="//build/buildtargets/buildtarget[@name=\"$TARGET\"]/repo[@type=\"binary\"]/text()"
	Xpath_get $TARGET_XPATH $TMP_BUILD
	TARGET_PATH=$XPATH_RESULT
	TARGET_URL=$PKG_URL/$TARGET_PATH

	REPOMD_URL=$TARGET_URL/repodata/repomd.xml
	PRIMARY_XPATH='string(//*[local-name()="data"][@type="primary"]/*[local-name()="location"]/@href)'

	Fetch $REPOMD_URL $TMP_REPOMD

	Debug "fetch $REPOMD_URL to $TMP_REPOMD"

	Xpath_get $PRIMARY_XPATH $TMP_REPOMD
	PRIMARY_XML_PATH=$XPATH_RESULT
	PRIMARY_URL=$TARGET_URL/$PRIMARY_XML_PATH

	Fetch $PRIMARY_URL $TMP_PRIMARYGZ

	Debug "fetch $PRIMARY_URL to $TMP_PRIMARYGZ"

	gunzip $TMP_PRIMARYGZ 

	Debug "unzip $TMP_PRIMARYGZ to $TMP_PRIMARY" 
}

fetch_tizen_pkgs()
{
	ARCH=$1
	PACKAGE_XPATH_TPL='string(//*[local-name()="metadata"]/*[local-name()="package"][*[local-name()="name"][text()="_PKG_"]][*[local-name()="arch"][text()="_ARCH_"]]/*[local-name()="location"]/@href)'

	PACKAGE_CHECKSUM_XPATH_TPL='string(//*[local-name()="metadata"]/*[local-name()="package"][*[local-name()="name"][text()="_PKG_"]][*[local-name()="arch"][text()="_ARCH_"]]/*[local-name()="checksum"]/text())'

	for pkg in ${@:2}
	do
		Inform "Fetching... $pkg"
		XPATH=${PACKAGE_XPATH_TPL/_PKG_/$pkg}
		XPATH=${XPATH/_ARCH_/$ARCH}
		Xpath_get $XPATH $TMP_PRIMARY
		PKG_PATH=$XPATH_RESULT

		XPATH=${PACKAGE_CHECKSUM_XPATH_TPL/_PKG_/$pkg}
		XPATH=${XPATH/_ARCH_/$ARCH}
		Xpath_get $XPATH $TMP_PRIMARY
		CHECKSUM=$XPATH_RESULT

		PKG_URL=$TARGET_URL/$PKG_PATH
		PKG_FILE=$(basename $PKG_PATH)
		PKG_PATH=$TMPDIR/$PKG_FILE

		Debug "Download $PKG_URL to $PKG_PATH"
		Fetch $PKG_URL $PKG_PATH true

		echo "$CHECKSUM $PKG_PATH" | sha256sum -c - > /dev/null
		if [ $? -ne 0 ]; then
			Error "Fail to fetch $PKG_URL to $PKG_PATH"
			Debug "Checksum = $CHECKSUM"
			exit 1
		fi
	done
}

Inform "Initialize arm base"
fetch_tizen_pkgs_init standard base
Inform "fetch common packages"
fetch_tizen_pkgs aarch64 gcc glibc glibc-devel libicu libicu-devel libatomic linux-glibc-devel
Inform "fetch coreclr packages"
fetch_tizen_pkgs aarch64 lldb lldb-devel libgcc libstdc++ libstdc++-devel libunwind libunwind-devel lttng-ust-devel lttng-ust userspace-rcu-devel userspace-rcu
Inform "fetch corefx packages"
fetch_tizen_pkgs aarch64 libcom_err libcom_err-devel zlib zlib-devel libopenssl libopenssl1.1-devel krb5 krb5-devel

Inform "Initialize standard unified"
fetch_tizen_pkgs_init standard unified
Inform "fetch corefx packages"
fetch_tizen_pkgs aarch64 gssdp gssdp-devel tizen-release