#!/usr/bin/bash

function readConfigEntriesArray() {
  yq eval '.'${1}' | explode(.) | to_entries | map([.key])[] | .[]' "${2}"
}

function getDSM() {
    MODEL="${1}"
    PLATFORM="${2}"
    PRODUCTVERS="$(readConfigEntriesArray "platforms.${PLATFORM}.productvers" "${P_FILE}" | sort -r)"
    echo "${PRODUCTVERS}" >"${TMP_PATH}/productvers"
    while IFS= read -r line; do
        PRODUCTVER="${line}"
        PJ="$(python scripts/functions.py getpats4mv -m "${MODEL}" -v "${PRODUCTVER}")"
        PVS="$(echo "${PJ}" | jq -r 'keys | sort | reverse | join("\n")')"
        echo "${PVS}" >"${TMP_PATH}/versions"
        while IFS= read -r line; do
            VERSION="${line}"
            CHECK_URL=$(echo "${PJ}" | jq -r ".\"${VERSION}\".url")
            if curl --head -skL -m 5 "${CHECK_URL}" | head -n 1 | grep -q "404\|403"; then
                continue
            else
                PAT_URL=$(echo "${PJ}" | jq -r ".\"${VERSION}\".url")
                PAT_HASH=$(echo "${PJ}" | jq -r ".\"${VERSION}\".sum")
                URLVER="$(echo "${PV}" | cut -d'.' -f1,2)"
                PAT_FILE="${MODEL}_${VERSION}.pat"
                PAT_PATH="${CACHE_PATH}/dl/${PAT_FILE}"
                UNTAR_PAT_PATH="${CACHE_PATH}/${MODEL}/${VERSION}"
                DESTINATION="${DSMPATH}/${MODEL}/${VERSION}"
                DESTINATIONFILES="${FILESPATH}/${MODEL}/${VERSION:0:3}"
                # Make Destinations
                mkdir -p "${DESTINATION}"
                mkdir -p "${DESTINATIONFILES}"
                echo "${MODEL} ${URLVER} (${VERSION})"
                echo "" >>"${TMP_PATH}/dsmdata.yml"
                echo "${MODEL} ${URLVER} (${VERSION})" >>"${TMP_PATH}/dsmdata.yml"
                echo "${PAT_URL}"
                echo "Url: ${PAT_URL}" >>"${TMP_PATH}/dsmdata.yml"
                echo "${PAT_HASH}"
                echo "Hash: ${PAT_HASH}" >>"${TMP_PATH}/dsmdata.yml"
                if [ -f "${DESTINATION}/pat_url" ] && [ -f "${DESTINATION}/pat_hash" ]; then
                    OLDURL="$(cat "${DESTINATION}/pat_url")"
                    OLDHASH="$(cat "${DESTINATION}/pat_hash")"
                else
                    OLDURL="0"
                    OLDHASH="0"
                fi
                # Check for Update
                if [ "${PAT_HASH}" != "${OLDHASH}" ] || [ "${PAT_URL}" != "${OLDURL}" ]; then
                    mkdir -p "${CACHE_PATH}/dl"
                    echo "Downloading ${PAT_FILE}"
                    # Discover remote file size
                    STATUS=$(curl -k -w "%{http_code}" -L "${PAT_URL}" -o "${PAT_PATH}" --progress-bar)
                    if [ $? -ne 0 -o ${STATUS} -ne 200 ]; then
                        rm "${PAT_PATH}"
                        echo "Error downloading"
                    fi
                    if [ -f "${PAT_PATH}" ]; then
                        # Export Values
                        echo "${PAT_HASH}" >"${DESTINATION}/pat_hash"
                        echo "${PAT_URL}" >"${DESTINATION}/pat_url"
                        # Extract Files
                        rm -rf "${UNTAR_PAT_PATH}"
                        mkdir -p "${UNTAR_PAT_PATH}"
                        echo -n "Disassembling ${PAT_FILE}: "
                        header=$(od -bcN2 ${PAT_PATH} | head -1 | awk '{print $3}')
                        case ${header} in
                            105)
                            echo "Uncompressed tar"
                            isencrypted="no"
                            ;;
                            213)
                            echo "Compressed tar"
                            isencrypted="no"
                            ;;
                            255)
                            echo "Encrypted"
                            isencrypted="yes"
                            ;;
                            *)
                            echo -e "Could not determine if pat file is encrypted or not, maybe corrupted, try again!"
                            ;;
                        esac
                        if [ "${isencrypted}" = "yes" ]; then
                            # Check existance of extractor
                            if [ -f "${EXTRACTOR_PATH}/${EXTRACTOR_BIN}" ]; then
                                echo "Extractor cached."
                            fi
                            # Uses the extractor to untar pat file
                            echo "Extracting..."
                            LD_LIBRARY_PATH="${EXTRACTOR_PATH}" "${EXTRACTOR_PATH}/${EXTRACTOR_BIN}" "${PAT_PATH}" "${UNTAR_PAT_PATH}"
                        else
                            echo "Extracting..."
                            tar -xf "${PAT_PATH}" -C "${UNTAR_PAT_PATH}"
                            if [ $? -ne 0 ]; then
                                echo "Error extracting"
                            fi
                        fi
                        # Export Hash
                        echo -n "Checking hash of zImage: "
                        HASH=$(sha256sum ${UNTAR_PAT_PATH}/zImage | awk '{print$1}')
                        echo "OK"
                        echo "${HASH}" >"${DESTINATION}/zImage_hash"
                        echo -n "Checking hash of ramdisk: "
                        HASH=$(sha256sum ${UNTAR_PAT_PATH}/rd.gz | awk '{print$1}')
                        echo "OK"
                        echo "${HASH}" >"${DESTINATION}/ramdisk_hash"
                        # Copy Files to Destination
                        echo -n "Copying files: "
                        cp "${UNTAR_PAT_PATH}/grub_cksum.syno" "${DESTINATION}"
                        cp "${UNTAR_PAT_PATH}/GRUB_VER"        "${DESTINATION}"
                        cp "${UNTAR_PAT_PATH}/grub_cksum.syno" "${DESTINATION}"
                        cp "${UNTAR_PAT_PATH}/GRUB_VER"        "${DESTINATION}"
                        cp "${UNTAR_PAT_PATH}/zImage"          "${DESTINATION}"
                        cp "${UNTAR_PAT_PATH}/rd.gz"           "${DESTINATION}"
                        cd "${DESTINATION}"
                        tar -cf "${DESTINATIONFILES}/${PAT_HASH}.tar" .
                        rm -f "${PAT_PATH}"
                        rm -rf "${UNTAR_PAT_PATH}"
                    fi
                    echo "DSM Extraction complete: ${MODEL}_${VERSION}"
                else
                    echo "No DSM Update found: ${MODEL}_${VERSION}"
                fi
                cd ${HOME}
            fi
        done < <(cat "${TMP_PATH}/versions")
        rm -f "${TMP_PATH}/versions"
    done < <(cat "${TMP_PATH}/productvers")
    rm -f "${TMP_PATH}/productvers"
}

# Init DSM Files
HOME=$(pwd)
CONFIGS="./configs"
TMP_PATH="${HOME}/tmp"
mkdir -p "${TMP_PATH}"
rm -f "${CONFIGS}"
mkdir -p "${CONFIGS}"
touch "${TMP_PATH}/dsmdata.yml"
TAG="$(curl --insecure -m 5 -s https://api.github.com/repos/AuxXxilium/arc-configs/releases/latest | grep "tag_name" | awk '{print substr($2, 2, length($2)-3)}')"
curl --insecure -s -w "%{http_code}" -L "https://github.com/AuxXxilium/arc-configs/releases/download/${TAG}/configs.zip" -o "./configs.zip"
unzip -oq "./configs.zip" -d "${CONFIGS}" >/dev/null 2>&1
P_FILE="${CONFIGS}/platforms.yml"
PS="$(readConfigEntriesArray "platforms" "${P_FILE}" | sort)"
MJ="$(python scripts/functions.py getmodels -p "${PS[*]}")"
echo -n "" >"${TMP_PATH}/modellist"
echo "${MJ}" | jq -c '.[]' | while read -r item; do
    name=$(echo "$item" | jq -r '.name')
    arch=$(echo "$item" | jq -r '.arch')
    echo "${name} ${arch}" >>"${TMP_PATH}/modellist"
done
CACHE_PATH="${HOME}/cache"
RAMDISK_PATH="${CACHE_PATH}/ramdisk"
EXTRACTOR_PATH="${CACHE_PATH}/extractor"
EXTRACTOR_BIN="syno_extract_system_patch"
DSMPATH="${HOME}/dsm"
FILESPATH="${HOME}/files"
while read -r M A; do
    MODEL=$(echo ${M} | sed 's/d$/D/; s/rp$/RP/; s/rp+/RP+/')
    getDSM "${MODEL}" "${A}"
    git config --global user.email "info@auxxxilium.tech"
    git config --global user.name "AuxXxilium"
    git fetch
    git add ${HOME}/.
    git commit -m "${MODEL}: update $(date +%Y-%m-%d" "%H:%M:%S)"
    git push -f
done < <(cat "${TMP_PATH}/modellist")
cp -f "${TMP_PATH}/dsmdata.yml" "${HOME}/dsmdata.yml"
# Cleanup DSM Files
rm -rf "${CACHE_PATH}/dl"
rm -rf "${CONFIGS}"
rm -rf "${TMP_PATH}"
rm -f "configs.zip"