#!/bin/sh

AL_TEMP_LOCATION="/tmp"
AL_INSTALL_ROOT="/tmp/alroot"
AL_INSTALLED_PKG_DATABASE="${AL_INSTALL_ROOT}/var/aps/installed"
AL_LOCAL_PKG_DATABASE="${AL_INSTALL_ROOT}/var/aps/repos"
AL_LOCK="${AL_INSTALL_ROOT}/var/aps/lock"

# Repo config
official="https://git.hippoz.xyz/alnux/repo"

set_default_package_config_values() {
    AL_PKG_CONFIG_DEPLOY=true
    AL_PKG_CONFIG_VER="0.1"
    AL_PKG_CONFIG_NAME="alnuxpackage"
    AL_PKG_CONFIG_MAKEDEPENDS=""
    AL_PKG_CONFIG_DEPENDS=""
}

unset_config_values() {
    unset AL_PKG_CONFIG_DEPLOY
    unset AL_PKG_CONFIG_VER
    unset AL_PKG_CONFIG_NAME
    unset AL_PKG_CONFIG_MAKEDEPENDS
    unset AL_PKG_CONFIG_DEPENDS
}

load_installed_pkg_config() {
    echo ":: Looking up package ${1} in local installed packages..."
    set_default_package_config_values
    if [ -d "${AL_INSTALLED_PKG_DATABASE}/${1}" ]; then
        echo ":: Package ${1} was found, loading config..."
        AL_PKG_NAME=${1}
        AL_PKG_PACKAGE_PATH="${AL_INSTALLED_PKG_DATABASE}/${1}"
        run_package_script "package"
    else
        echo "[E] Package ${1} was not found in the local installed package database, exiting..."
        exit 1
    fi
}

extract_package() {
    echo "[*] Copying package ${1} into temporary location ${AL_TEMP_LOCATION}..."
    #tar -xf "${1}" -C "${AL_TEMP_LOCATION}"
    cp -prv "${1}" "${AL_TEMP_LOCATION}"
    AL_PKG_NAME="${1%/}"
    AL_PKG_NAME="${AL_PKG_NAME##*/}"
    AL_PKG_NAME=$(echo "${AL_PKG_NAME}" | cut -f 1 -d '.')
    cd "${AL_INSTALL_ROOT}"

    AL_PKG_PACKAGE_PATH="${AL_TEMP_LOCATION}/${AL_PKG_NAME}"

    set_default_package_config_values
}

add_package_to_database() {
    if [ ! -d "${AL_INSTALLED_PKG_DATABASE}" ]; then
        echo "[*] Package database folder not found, creating..."
        mkdir -pv "${AL_INSTALLED_PKG_DATABASE}"
    fi

    if [ -x "${AL_PKG_PACKAGE_PATH}/package" ]; then
        echo ":: Adding target ${AL_PKG_NAME} to installed package database..."
        if [ ! -d "${AL_INSTALLED_PKG_DATABASE}/${AL_PKG_NAME}" ]; then
            echo "[*] Package folder for ${AL_PKG_NAME} not found, creating..."
            mkdir "${AL_INSTALLED_PKG_DATABASE}/${AL_PKG_NAME}"
        fi
        cp -pv "${AL_PKG_PACKAGE_PATH}/package" "${AL_INSTALLED_PKG_DATABASE}/${AL_PKG_NAME}/package"
        if [ -e "${AL_TEMP_LOCATION}/${AL_PKG_NAME}-payloadfiles" ]; then
            cp -pv "${AL_TEMP_LOCATION}/${AL_PKG_NAME}-payloadfiles" "${AL_INSTALLED_PKG_DATABASE}/${AL_PKG_NAME}/payloadfiles"
        fi
    else
        echo "[*] Target ${AL_PKG_NAME} does not have a package script and will not be added to the installed package database"
    fi
}

run_package_script() {
    if [ -x "${AL_PKG_PACKAGE_PATH}/${1}" ]; then
        echo ":: Running ${1} script for target ${AL_PKG_NAME}..."
        . "${AL_PKG_PACKAGE_PATH}/${1}"
    fi
}

deploy_package_payload() {
    if [ "${AL_PKG_CONFIG_DEPLOY}" = true ]; then
        echo ":: Deploying target ${AL_PKG_NAME}..."
        cp -rpv "${AL_PKG_PACKAGE_PATH}/payload"/* "${AL_INSTALL_ROOT}" > "${AL_TEMP_LOCATION}/${AL_PKG_NAME}-payloaddeploylog"
        sed 's/^.*-> //' "${AL_TEMP_LOCATION}/${AL_PKG_NAME}-payloaddeploylog" | tr -d \'\" > "${AL_TEMP_LOCATION}/${AL_PKG_NAME}-payloadfiles"
        rm "${AL_TEMP_LOCATION}/${AL_PKG_NAME}-payloaddeploylog"
    fi
}

install_extracted_package() {
    run_package_script "package"
    run_package_script "build"
    run_package_script "predeploy"
    deploy_package_payload
    run_package_script "postdeploy"

    echo "[*] Install complete for target ${AL_PKG_NAME}"
}

extract_cleanup() {
    echo "[*] Cleaning up after target ${AL_PKG_NAME}..."
    rm -rv "${AL_PKG_PACKAGE_PATH}"
    rm -v "${AL_TEMP_LOCATION}/${AL_PKG_NAME}-payloadfiles"

    unset AL_PKG_PACKAGE_PATH
    unset AL_PKG_NAME

    unset_config_values

    cd "${AL_INSTALL_ROOT}"
}

install_local_package() {
    if [ ! -e "${1}" ]; then
        echo "[E] File ${1} does not exist, exiting..."
        exit 1
    fi

    extract_package "${1}"
    install_extracted_package
    add_package_to_database
    extract_cleanup
}

remove_local_package() {
    load_installed_pkg_config "${1}"
    PAYLOADFILES_PATH="${AL_PKG_PACKAGE_PATH}/payloadfiles"

    if [ ! -e "${PAYLOADFILES_PATH}" ]; then
        echo "[E] Package ${1} does not have a payloadfiles file. Exiting..."
        exit 0
    fi

    echo ":: Removing target ${1}..."

    rm -rv $(<${PAYLOADFILES_PATH})
    rm -rv ${AL_PKG_PACKAGE_PATH}

    echo "[*] Removal complete for target ${AL_PKG_NAME}"
}

sync_local_repo_database() {
    echo ":: Syncing local database for repo ${1}..."
    if [ ! -d "${AL_LOCAL_PKG_DATABASE}/${1}" ]; then
        echo ":: Local database for repo ${1} does not exist, cloning..."
        git clone "${2}" "${AL_LOCAL_PKG_DATABASE}/${1}"
    else
        echo ":: Local database for repo ${1} exists, updating..."
        cd "${AL_LOCAL_PKG_DATABASE}/${1}"
        git pull
    fi
}

install_package_from_repo() { # NOTE(hippoz): This can get a tad confusing... ${1} is the repo and ${2} is the package
    echo ":: Installing package ${2} from ${1} repo"
    if [ ! -d "${AL_LOCAL_PKG_DATABASE}/${1}/${2}" ]; then
        echo "[E] Package ${2} was not found in ${1}, exiting..."
        exit 1
    else
        install_local_package "${AL_LOCAL_PKG_DATABASE}/${1}/${2}"
    fi
}

upgrade() {
    echo ":: Upgrading installed packages..."
    unset_config_values
    cd "${AL_INSTALLED_PKG_DATABASE}"
    for pkg in */; do
        INSTALLED_PKG_PATH="${AL_INSTALLED_PKG_DATABASE}/${pkg}"
        . ${INSTALLED_PKG_PATH}/package
        AL_PKG_NAME="${INSTALLED_PKG_PATH%/}"
        AL_PKG_NAME="${AL_PKG_NAME##*/}"

        ALREADY_INSTALLED_VERSION=${AL_PKG_CONFIG_VER}

        if [ ! -d "${AL_LOCAL_PKG_DATABASE}/${1}/${AL_PKG_NAME}" ]; then
            echo "[E] Package ${AL_PKG_NAME} was not found in ${1}, exiting..."
            exit 1
        else
            . "${AL_LOCAL_PKG_DATABASE}/${1}/${AL_PKG_NAME}/package"
        fi

        if [ ! "${ALREADY_INSTALLED_VERSION}" = "${AL_PKG_CONFIG_VER}" ]; then
            echo ":: Package ${AL_PKG_NAME} is out of date, updating..."
            install_package_from_repo "${1}" "${AL_PKG_NAME}"
        fi

        unset_config_values
    done
}

main() {
    if [ -f "${AL_LOCK}" ]; then
        echo "[E] A lock file already exists."
        echo "    If you're sure no package manager is running,"
        echo "    remove the file ${AL_LOCK}"
    fi
    touch "${AL_LOCK}"

    case ${1} in
        install)
            install_local_package "${2}"
            ;;
        remove)
            remove_local_package "${2}"
            ;;
        sync)
            sync_local_repo_database "official" ${official}
            if [ -z "${2}" ]; then
                echo "[*] No targets specified."
            else
                install_package_from_repo "official" "${2}"
            fi
            ;;
        upgrade)
            upgrade "official"
            ;;
        *)
            echo "[E] Invalid option ${1}, exiting..."
            rm "${AL_LOCK}"
            exit 0
            ;;
    esac

    rm "${AL_LOCK}"
}

main "${1}" "${2}"