#! /usr/bin/env sh

# defaults
[ -n "${SPCD_BRANCH_RELEASE}" ] || SPCD_BRANCH_RELEASE="main"
[ -n "${SPCD_BRANCH_STAGING}" ] || SPCD_BRANCH_STAGING="dev"
[ -n "${SPCD_BRANCH_FEATURE}" ] || SPCD_BRANCH_FEATURE="f"
[ -n "${SPCD_CMD_SUM}" ] || SPCD_CMD_SUM="sha512sum"
[ -n "${SPCD_DNS_1}" ] || SPCD_DNS_1="9.9.9.9"
[ -n "${SPCD_GIT_MAIN}" ] || SPCD_GIT_MAIN="spcd"
[ -n "${SPCD_GIT_ROOT}" ] || SPCD_GIT_ROOT="rwx"
[ -n "${SPCD_URL_PYTHON}" ] || SPCD_URL_PYTHON="https://pypi.org/simple"

# main
spcd_main() {
    spcd_set_environment_variables
    #
    spcd_list_working_directory
    #
    spcd_set_packages_repositories
    spcd_set_packages_configuration
    #
    spcd_set_https_verification_off
    spcd_set_dns_resolving
    spcd_update_packages_catalog
    spcd_install_packages_tools
    spcd_install_ca_certificates
    spcd_write_ca_certificates
    spcd_update_ca_certificates
    spcd_set_https_verification_on
    spcd_update_packages_catalog
    spcd_upgrade_packages
    spcd_install_dos2unix
    spcd_install_git
    spcd_install_python
    spcd_install_python_modules
    spcd_install_packages
    spcd_write_python_module
    spcd_switch_to_python
}

# steps

spcd_set_environment_variables() {
    spcd_step "Set environment variables"
    # check script first
    [ -n "${SPCD}" ] || spcd_error_ci "SPCD"
    # continuous integration / github → gitea → forgejo
    if [ -n "${GITHUB_ACTIONS}" ]; then
        # project branch
        if [ -n "${GITHUB_REF_NAME}" ]; then
            SPCD_PROJECT_BRANCH="${GITHUB_REF_NAME}"
        else
            spcd_error_ci "GITHUB_REF_NAME"
        fi
        # project root
        if [ -n "${GITHUB_SERVER_URL}" ]; then
            SPCD_PROJECT_ROOT="$(dirname "${GITHUB_SERVER_URL}")//"
            [ -n "${GITHUB_TOKEN}" ] &&
                SPCD_PROJECT_ROOT="${SPCD_PROJECT_ROOT}${GITHUB_TOKEN}@"
            SPCD_PROJECT_ROOT="\
${SPCD_PROJECT_ROOT}$(basename "${GITHUB_SERVER_URL}")"
        else
            spcd_error_ci "GITHUB_SERVER_URL"
        fi
        # project path & name
        if [ -n "${GITHUB_REPOSITORY}" ]; then
            # project path
            SPCD_PROJECT_PATH="$(dirname "${GITHUB_REPOSITORY}")"
            # project name
            SPCD_PROJECT_NAME="$(basename "${GITHUB_REPOSITORY}")"
        else
            spcd_error_ci "GITHUB_REPOSITORY"
        fi
    # continuous integration / gitlab
    elif [ -n "${GITLAB_CI}" ]; then
        # project branch
        if [ -n "${CI_COMMIT_BRANCH}" ]; then
            SPCD_PROJECT_BRANCH="${CI_COMMIT_BRANCH}"
        else
            spcd_error_ci "CI_COMMIT_BRANCH"
        fi
        # project root / protocol
        if [ -n "${CI_SERVER_PROTOCOL}" ]; then
            # project root / login
            if [ -n "${CI_REGISTRY_USER}" ]; then
                # project root / password
                if [ -n "${CI_REGISTRY_PASSWORD}" ]; then
                    # project root / host
                    if [ -n "${CI_SERVER_FQDN}" ]; then
                        # project root
                        SPCD_PROJECT_ROOT="${CI_SERVER_PROTOCOL}\
://${CI_REGISTRY_USER}:${CI_REGISTRY_PASSWORD}@${CI_SERVER_FQDN}"
                        # project path
                        if [ -n "${CI_PROJECT_NAMESPACE}" ]; then
                            SPCD_PROJECT_PATH="${CI_PROJECT_NAMESPACE}"
                            # project name
                            if [ -n "${CI_PROJECT_NAME}" ]; then
                                SPCD_PROJECT_NAME="${CI_PROJECT_NAME}"
                            else
                                spcd_error_ci "CI_PROJECT_NAME"
                            fi
                        else
                            spcd_error_ci "CI_PROJECT_NAMESPACE"
                        fi
                    else
                        spcd_error_ci "CI_SERVER_FQDN"
                    fi
                else
                    spcd_error_ci "CI_REGISTRY_PASSWORD"
                fi
            else
                spcd_error_ci "CI_REGISTRY_USER"
            fi
        else
            spcd_error_ci "CI_SERVER_PROTOCOL"
        fi
    # continuous integration / unsupported
    else
        spcd_error_ci "ø"
    fi
    # check project variables
    case "${SPCD_PROJECT_BRANCH}" in
    "${SPCD_BRANCH_RELEASE}" | \
        "${SPCD_BRANCH_STAGING}" | \
        "${SPCD_BRANCH_FEATURE}") ;;
    *) spcd_error_ci "SPCD_PROJECT_BRANCH" ;;
    esac
    [ -n "${SPCD_PROJECT_ROOT}" ] || spcd_error_ci "SPCD_PROJECT_ROOT"
    [ -n "${SPCD_PROJECT_PATH}" ] || spcd_error_ci "SPCD_PROJECT_PATH"
    [ -n "${SPCD_PROJECT_NAME}" ] || spcd_error_ci "SPCD_PROJECT_NAME"
    #
    spcd_echo "SPCD_PROJECT_BRANCH" \
        "SPCD_PROJECT_ROOT" "SPCD_PROJECT_PATH" "SPCD_PROJECT_NAME"
    # set path
    SPCD_PATH="$(realpath "${0}")"
    spcd_echo "SPCD_PATH"
    # set operating system id
    SPCD_OS_ID="$(spcd_grep_os ID)"
    case "${SPCD_OS_ID}" in
    "almalinux") SPCD_OS_ID="${SPCD_OS_ALMA}" ;;
    "alpine") SPCD_OS_ID="${SPCD_OS_ALPINE}" ;;
    "arch") SPCD_OS_ID="${SPCD_OS_ARCH}" ;;
    "debian") SPCD_OS_ID="${SPCD_OS_DEBIAN}" ;;
    "fedora") SPCD_OS_ID="${SPCD_OS_FEDORA}" ;;
    "opensuse-leap") SPCD_OS_ID="${SPCD_OS_OPENSUSE}" ;;
    "rocky") SPCD_OS_ID="${SPCD_OS_ROCKY}" ;;
    "ubuntu") SPCD_OS_ID="${SPCD_OS_UBUNTU}" ;;
    *) spcd_error_os "SPCD_OS_ID" ;;
    esac
    # set operating system version
    case "${SPCD_OS_ID}" in
    "${SPCD_OS_ALMA}" | "${SPCD_OS_FEDORA}" | "${SPCD_OS_ROCKY}" | \
        "${SPCD_OS_ARCH}")
        SPCD_OS_VERSION=$(spcd_grep_os VERSION_ID |
            sed "s|^\([0-9]\+\)\..*|\1|")
        ;;
    "${SPCD_OS_ALPINE}" | "${SPCD_OS_OPENSUSE}")
        SPCD_OS_VERSION=$(spcd_grep_os VERSION_ID |
            sed "s|^\([0-9]\+\.[0-9]\+\)\..*|\1|")
        ;;
    "${SPCD_OS_DEBIAN}" | "${SPCD_OS_UBUNTU}")
        SPCD_OS_VERSION="$(spcd_grep_os VERSION_CODENAME)"
        ;;
    *) ;;
    esac
    # check operating system version
    case "${SPCD_OS_ID}" in
    "${SPCD_OS_ALMA}" | "${SPCD_OS_ROCKY}")
        case "${SPCD_OS_VERSION}" in
        "9" | "8") ;;
        *) spcd_error_os "SPCD_OS_VERSION" ;;
        esac
        ;;
    "${SPCD_OS_ALPINE}")
        case "${SPCD_OS_VERSION}" in
        "3.20" | "3.19") ;;
        *) spcd_error_os "SPCD_OS_VERSION" ;;
        esac
        ;;
    "${SPCD_OS_ARCH}")
        case "${SPCD_OS_VERSION}" in
        "20240101" | "20231112") ;;
        *) spcd_error_os "SPCD_OS_VERSION" ;;
        esac
        ;;
    "${SPCD_OS_DEBIAN}")
        case "${SPCD_OS_VERSION}" in
        "bullseye" | "bookworm") ;;
        *) spcd_error_os "SPCD_OS_VERSION" ;;
        esac
        ;;
    "${SPCD_OS_FEDORA}")
        case "${SPCD_OS_VERSION}" in
        "40" | "39") ;;
        *) spcd_error_os "SPCD_OS_VERSION" ;;
        esac
        ;;
    "${SPCD_OS_OPENSUSE}")
        case "${SPCD_OS_VERSION}" in
        "15.6" | "15.5") ;;
        *) spcd_error_os "SPCD_OS_VERSION" ;;
        esac
        ;;
    "${SPCD_OS_UBUNTU}")
        case "${SPCD_OS_VERSION}" in
        "noble" | "jammy") ;;
        *) spcd_error_os "SPCD_OS_VERSION" ;;
        esac
        ;;
    *) ;;
    esac
    spcd_split
    spcd_echo "SPCD_OS_ID" "SPCD_OS_VERSION"
    # universal
    SPCD_DNS_FILE="/etc/resolv.conf"
    SPCD_PKG_CA="ca-certificates"
    SPCD_PKG_DOS2UNIX="dos2unix"
    SPCD_PKG_GIT="git"
    SPCD_PYTHON_ALIAS="python3"
    spcd_split
    spcd_echo "SPCD_DNS_FILE" \
        "SPCD_PKG_CA" "SPCD_PKG_DOS2UNIX" "SPCD_PKG_GIT" "SPCD_PYTHON_ALIAS"
    # set ca command & root
    case "${SPCD_OS_ID}" in
    "${SPCD_OS_ALMA}" | "${SPCD_OS_FEDORA}" | "${SPCD_OS_ROCKY}")
        SPCD_CA_ROOT="/etc/pki/ca-trust/source/anchors"
        SPCD_CMD_CA="update-ca-trust"
        ;;
    "${SPCD_OS_ALPINE}")
        SPCD_CA_ROOT="/usr/local/share/ca-certificates"
        SPCD_CMD_CA="update-ca-certificates"
        ;;
    "${SPCD_OS_ARCH}")
        SPCD_CA_ROOT="/etc/ca-certificates/trust-source/anchors"
        SPCD_CMD_CA="update-ca-trust"
        ;;
    "${SPCD_OS_DEBIAN}" | "${SPCD_OS_UBUNTU}")
        SPCD_CA_ROOT="/usr/local/share/ca-certificates"
        SPCD_CMD_CA="update-ca-certificates"
        ;;
    "${SPCD_OS_OPENSUSE}")
        SPCD_CA_ROOT="/etc/pki/trust/anchors"
        SPCD_CMD_CA="update-ca-certificates"
        ;;
    *) ;;
    esac
    spcd_split
    spcd_echo "SPCD_CA_ROOT" "SPCD_CMD_CA"
    # set package manager
    case "${SPCD_OS_ID}" in
    "${SPCD_OS_ALPINE}")
        SPCD_PM="${SPCD_PM_APK}"
        ;;
    "${SPCD_OS_DEBIAN}" | "${SPCD_OS_UBUNTU}")
        SPCD_PM="${SPCD_PM_APT}"
        ;;
    "${SPCD_OS_ALMA}" | "${SPCD_OS_FEDORA}" | "${SPCD_OS_ROCKY}")
        SPCD_PM="${SPCD_PM_DNF}"
        ;;
    "${SPCD_OS_ARCH}")
        SPCD_PM="${SPCD_PM_PACMAN}"
        ;;
    "${SPCD_OS_OPENSUSE}")
        SPCD_PM="${SPCD_PM_ZYPPER}"
        ;;
    *) ;;
    esac
    spcd_split
    spcd_echo "SPCD_PM"
    case "${SPCD_PM}" in
    "${SPCD_PM_DNF}")
        SPCD_PM_CLEAN="dnf clean all"
        SPCD_PM_INSTALL="dnf install --assumeyes"
        SPCD_PM_QUERY="rpm --query"
        SPCD_PM_UPDATE="dnf makecache"
        SPCD_PM_UPGRADE="dnf upgrade --assumeyes"
        SPCD_PKG_PKG=""
        SPCD_PM_CONF_PATH="/etc/dnf/dnf.conf"
        SPCD_PM_CONF_TEXT="\
[main]
best=True
clean_requirements_on_remove=True
gpgcheck=1
installonly_limit=3
skip_if_unavailable=False
"
        SPCD_PM_HTTPS_PATH="/etc/dnf/dnf.conf.d/https.conf"
        SPCD_PM_HTTPS_TEXT="\
sslverify=False
"
        ;;
    "${SPCD_PM_APK}")
        SPCD_PM_CLEAN="apk cache purge"
        SPCD_PM_INSTALL="apk add"
        SPCD_PM_QUERY="apk info"
        SPCD_PM_UPDATE="apk update"
        SPCD_PM_UPGRADE="apk upgrade"
        SPCD_PKG_PKG=""
        SPCD_PM_CONF_PATH=""
        SPCD_PM_CONF_TEXT=""
        SPCD_PM_HTTPS_PATH="/etc/apk/repositories.d/https"
        SPCD_PM_HTTPS_TEXT="\
--no-verify
"
        ;;
    "${SPCD_PM_PACMAN}")
        SPCD_PM_CLEAN="pacman --sync --clean --noconfirm"
        SPCD_PM_INSTALL="pacman --sync --noconfirm"
        SPCD_PM_QUERY="pacman --query"
        SPCD_PM_UPDATE="pacman --sync --refresh"
        SPCD_PM_UPGRADE="pacman --sync --sysupgrade --noconfirm"
        SPCD_PKG_PKG=""
        SPCD_PM_CONF_PATH=""
        SPCD_PM_CONF_TEXT=""
        SPCD_PM_HTTPS_PATH="/etc/pacman.d/https.conf"
        SPCD_PM_HTTPS_TEXT="\
SSLVerify = No
"
        ;;
    "${SPCD_PM_APT}")
        SPCD_PM_CLEAN="apt-get clean"
        SPCD_PM_INSTALL="apt-get install --assume-yes"
        SPCD_PM_QUERY="dpkg-query --show"
        SPCD_PM_UPDATE="apt-get update"
        SPCD_PM_UPGRADE="apt-get upgrade --assume-yes"
        SPCD_PKG_PKG="apt-utils"
        SPCD_PM_CONF_PATH="/etc/apt/apt.conf.d/apt.conf"
        SPCD_PM_CONF_TEXT="\
Acquire::Check-Valid-Until True;
APT::Get::Show-Versions True;
APT::Install-Recommends False;
APT::Install-Suggests False;
Dir::Etc::SourceParts \"\";
"
        SPCD_PM_HTTPS_PATH="/etc/apt/apt.conf.d/https"
        SPCD_PM_HTTPS_TEXT="\
Acquire::https::Verify-Peer False;
"
        ;;
    "${SPCD_PM_ZYPPER}")
        SPCD_PM_CLEAN="zypper clean"
        SPCD_PM_INSTALL="zypper --non-interactive install"
        SPCD_PM_QUERY="rpm --query"
        SPCD_PM_UPDATE="zypper refresh"
        SPCD_PM_UPGRADE="zypper --non-interactive update"
        SPCD_PKG_PKG=""
        SPCD_PM_CONF_PATH=""
        SPCD_PM_CONF_TEXT="\
"
        SPCD_PM_HTTPS_PATH=""
        SPCD_PM_HTTPS_TEXT="\
"
        ;;
    *) ;;
    esac
    spcd_split
    spcd_echo "SPCD_PM_CLEAN" \
        "SPCD_PM_INSTALL" "SPCD_PM_QUERY" "SPCD_PM_UPDATE" "SPCD_PM_UPGRADE"
    spcd_split
    spcd_echo "SPCD_PKG_PKG" "SPCD_PM_CONF_PATH" "SPCD_PM_HTTPS_PATH"
    # specific
    case "${SPCD_OS_ID}" in
    "${SPCD_OS_ALMA}")
        SPCD_URL_DEFAULT="https://repo.almalinux.org/almalinux"
        ;;
    "${SPCD_OS_ALPINE}")
        SPCD_URL_DEFAULT="https://dl-cdn.alpinelinux.org/alpine"
        ;;
    "${SPCD_OS_ARCH}")
        SPCD_URL_DEFAULT="https://geo.mirror.pkgbuild.com"
        ;;
    "${SPCD_OS_DEBIAN}")
        SPCD_URL_DEFAULT="http://deb.debian.org/debian"
        ;;
    "${SPCD_OS_FEDORA}")
        SPCD_URL_DEFAULT="http://download.example/pub/fedora/linux/releases"
        ;;
    "${SPCD_OS_OPENSUSE}")
        SPCD_URL_DEFAULT="http://download.opensuse.org"
        ;;
    "${SPCD_OS_ROCKY}")
        SPCD_URL_DEFAULT="http://dl.rockylinux.org/\$contentdir"
        ;;
    "${SPCD_OS_UBUNTU}")
        SPCD_URL_DEFAULT="http://archive.ubuntu.com/ubuntu"
        ;;
    *) ;;
    esac
    SPCD_URL_CHOSEN="${SPCD_URL_DEFAULT}"
    case "${SPCD_OS_ID}" in
    "${SPCD_OS_ALMA}")
        [ -n "${SPCD_URL_ALMA}" ] && SPCD_URL_CHOSEN="${SPCD_URL_ALMA}"
        ;;
    "${SPCD_OS_ALPINE}")
        [ -n "${SPCD_URL_ALPINE}" ] && SPCD_URL_CHOSEN="${SPCD_URL_ALPINE}"
        ;;
    "${SPCD_OS_ARCH}")
        [ -n "${SPCD_URL_ARCH}" ] && SPCD_URL_CHOSEN="${SPCD_URL_ARCH}"
        ;;
    "${SPCD_OS_DEBIAN}")
        [ -n "${SPCD_URL_DEBIAN}" ] && SPCD_URL_CHOSEN="${SPCD_URL_DEBIAN}" ||
            SPCD_URL_CHOSEN="https://deb.debian.org/debian"
        ;;
    "${SPCD_OS_FEDORA}")
        [ -n "${SPCD_URL_FEDORA}" ] && SPCD_URL_CHOSEN="${SPCD_URL_FEDORA}" ||
            SPCD_URL_CHOSEN="https://rpmfind.net/linux/fedora/linux/releases"
        ;;
    "${SPCD_OS_OPENSUSE}")
        [ -n "${SPCD_URL_OPENSUSE}" ] &&
            SPCD_URL_CHOSEN="${SPCD_URL_OPENSUSE}" ||
            SPCD_URL_CHOSEN="https://download.opensuse.org"
        ;;
    "${SPCD_OS_ROCKY}")
        [ -n "${SPCD_URL_ROCKY}" ] && SPCD_URL_CHOSEN="${SPCD_URL_ROCKY}" ||
            SPCD_URL_CHOSEN="https://dl.rockylinux.org/\$contentdir"
        ;;
    "${SPCD_OS_UBUNTU}")
        [ -n "${SPCD_URL_UBUNTU}" ] && SPCD_URL_CHOSEN="${SPCD_URL_UBUNTU}" ||
            SPCD_URL_CHOSEN="https://ubuntu.mirrors.ovh.net/ubuntu"
        ;;
    *) ;;
    esac
    spcd_split
    spcd_echo "SPCD_URL_DEFAULT" "SPCD_URL_CHOSEN"
    # set python command & package
    case "${SPCD_OS_ID}" in
    "${SPCD_OS_ALMA}" | "${SPCD_OS_ROCKY}")
        SPCD_PYTHON_COMMAND="python3.12"
        SPCD_PYTHON_PACKAGE="python3.12"
        ;;
    "${SPCD_OS_ALPINE}")
        case "${SPCD_OS_VERSION}" in
        "3.20") SPCD_PYTHON_COMMAND="python3.12" ;;
        "3.19") SPCD_PYTHON_COMMAND="python3.11" ;;
        *) ;;
        esac
        SPCD_PYTHON_PACKAGE="python3"
        ;;
    "${SPCD_OS_ARCH}")
        SPCD_PYTHON_COMMAND="python3.12"
        SPCD_PYTHON_PACKAGE="python"
        ;;
    "${SPCD_OS_DEBIAN}")
        case "${SPCD_OS_VERSION}" in
        "bookworm") SPCD_PYTHON_COMMAND="python3.11" ;;
        "bullseye") SPCD_PYTHON_COMMAND="python3.9" ;;
        *) ;;
        esac
        SPCD_PYTHON_PACKAGE="python3"
        ;;
    "${SPCD_OS_FEDORA}")
        SPCD_PYTHON_COMMAND="python3.12"
        SPCD_PYTHON_PACKAGE="python3"
        ;;
    "${SPCD_OS_OPENSUSE}")
        case "${SPCD_OS_VERSION}" in
        "15.6")
            SPCD_PYTHON_COMMAND="python3.12"
            SPCD_PYTHON_PACKAGE="python312"
            ;;
        "15.5")
            SPCD_PYTHON_COMMAND="python3.11"
            SPCD_PYTHON_PACKAGE="python311"
            ;;
        *) ;;
        esac
        ;;
    "${SPCD_OS_UBUNTU}")
        case "${SPCD_OS_VERSION}" in
        "noble") SPCD_PYTHON_COMMAND="python3.12" ;;
        "jammy") SPCD_PYTHON_COMMAND="python3.10" ;;
        *) ;;
        esac
        SPCD_PYTHON_PACKAGE="python3"
        ;;
    *) ;;
    esac
    spcd_split
    spcd_echo "SPCD_PYTHON_COMMAND" "SPCD_PYTHON_PACKAGE"
    # set python packages
    case "${SPCD_OS_ID}" in
    "${SPCD_OS_ALMA}" | "${SPCD_OS_FEDORA}" | "${SPCD_OS_ROCKY}" | \
        "${SPCD_OS_OPENSUSE}")
        SPCD_PYTHON_PACKAGES="/usr/lib64/${SPCD_PYTHON_COMMAND}/site-packages"
        ;;
    "${SPCD_OS_ALPINE}" | "${SPCD_OS_ARCH}")
        SPCD_PYTHON_PACKAGES="/usr/lib/${SPCD_PYTHON_COMMAND}/site-packages"
        ;;
    "${SPCD_OS_DEBIAN}" | "${SPCD_OS_UBUNTU}")
        SPCD_PYTHON_PACKAGES="/usr/lib/${SPCD_PYTHON_ALIAS}/dist-packages"
        ;;
    *) ;;
    esac
    SPCD_PYTHON_VENV_PACKAGES="\
${SPCD_PYTHON_VENV}/lib/${SPCD_PYTHON_COMMAND}/site-packages"
    spcd_split
    spcd_echo "SPCD_PYTHON_PACKAGES" "SPCD_PYTHON_VENV_PACKAGES"
    # variables
    [ -n "${SPCD_CA_1}" ] && SPCD_CA=true
    #
    spcd_split
    spcd_echo "SPCD_CA"
}

spcd_list_working_directory() {
    spcd_step "List working directory"
    spcd_lwd__path="$(realpath .)"
    spcd_ls "${spcd_lwd__path}"
}

spcd_set_packages_repositories() {
    spcd_step "Set packages repositories"
    case "${SPCD_OS_ID}" in
    "${SPCD_OS_ALMA}")
        case "${SPCD_OS_VERSION}" in
        "8") spcd_spr__file="/etc/yum.repos.d/almalinux.repo" ;;
        "9") spcd_spr__file="/etc/yum.repos.d/almalinux-baseos.repo" ;;
        *) ;;
        esac
        spcd_sed "${spcd_spr__file}" \
            "|^mirrorlist|# mirrorlist|" \
            "|${SPCD_URL_DEFAULT}|${SPCD_URL_CHOSEN}|" \
            "|^# baseurl|baseurl|"
        ;;
    "${SPCD_OS_ALPINE}")
        spcd_spr__file="/etc/apk/repositories"
        spcd_write "${spcd_spr__file}" "\
${SPCD_URL_CHOSEN}/v${SPCD_OS_VERSION}/main
${SPCD_URL_CHOSEN}/v${SPCD_OS_VERSION}/community
"
        ;;
    "${SPCD_OS_DEBIAN}")
        spcd_spr__file="/etc/apt/sources.list"
        spcd_write "${spcd_spr__file}" "\
deb ${SPCD_URL_CHOSEN} ${SPCD_OS_VERSION} main
deb ${SPCD_URL_CHOSEN} ${SPCD_OS_VERSION}-backports main
deb ${SPCD_URL_CHOSEN} ${SPCD_OS_VERSION}-updates main
deb ${SPCD_URL_CHOSEN}-security ${SPCD_OS_VERSION}-security main
"
        ;;
    "${SPCD_OS_OPENSUSE}")
        for spcd_spr__file in \
            "backports-update" \
            "non-oss" \
            "oss" \
            "sle-update" \
            "update-non-oss" \
            "update" \
            "openh264"; do
            spcd_sed "/etc/zypp/repos.d/repo-${spcd_spr__file}.repo" \
                "|${SPCD_URL_DEFAULT}|${SPCD_URL_CHOSEN}|"
        done
        ;;
    "${SPCD_OS_ROCKY}")
        case "${SPCD_OS_VERSION}" in
        "8") spcd_spr__file="/etc/yum.repos.d/Rocky-BaseOS.repo" ;;
        "9") spcd_spr__file="/etc/yum.repos.d/rocky.repo" ;;
        *) ;;
        esac
        spcd_sed "${spcd_spr__file}" \
            "|^mirrorlist|# mirrorlist|" \
            "|${SPCD_URL_DEFAULT}|${SPCD_URL_CHOSEN}|" \
            "|^#baseurl|baseurl|"
        ;;
    "${SPCD_OS_UBUNTU}")
        spcd_spr__file="/etc/apt/sources.list"
        spcd_write "${spcd_spr__file}" "\
deb ${SPCD_URL_CHOSEN} ${SPCD_OS_VERSION} main universe
deb ${SPCD_URL_CHOSEN} ${SPCD_OS_VERSION}-backports main universe
deb ${SPCD_URL_CHOSEN} ${SPCD_OS_VERSION}-updates main universe
deb ${SPCD_URL_CHOSEN} ${SPCD_OS_VERSION}-security main universe
"
        ;;
    *) ;;
    esac
}

spcd_set_packages_configuration() {
    spcd_step "Set packages configuration"
    spcd_write "${SPCD_PM_CONF_PATH}" "${SPCD_PM_CONF_TEXT}"
    case "${SPCD_OS_ID}" in
    "${SPCD_OS_ARCH}")
        pacman-key --init
        ;;
    "${SPCD_OS_DEBIAN}" | "${SPCD_OS_UBUNTU}")
        export DEBIAN_FRONTEND="noninteractive"
        ;;
    *) ;;
    esac
}

# agnostic steps

spcd_set_https_verification_off() {
    if [ -n "${SPCD_CA}" ] || [ "${SPCD_PM}" = "${SPCD_PM_APT}" ]; then
        spcd_step "Set HTTPS verification off"
        spcd_mkdir "$(dirname "${SPCD_PM_HTTPS_PATH}")"
        spcd_write "${SPCD_PM_HTTPS_PATH}" "${SPCD_PM_HTTPS_TEXT}"
    fi
}

spcd_set_dns_resolving() {
    spcd_step "Set DNS resolving"
    while true; do
        spcd_sdr__index=$((spcd_sdr__index + 1))
        eval "spcd_sdr__value=\"\${SPCD_DNS_${spcd_sdr__index}}\""
        [ -n "${spcd_sdr__value}" ] || break
        spcd_sdr__text="${spcd_sdr__text}\
nameserver ${spcd_sdr__value}
"
    done
    spcd_write "${SPCD_DNS_FILE}" "${spcd_sdr__text}"
}

spcd_update_packages_catalog() {
    spcd_step "Update packages catalog"
    ${SPCD_PM_UPDATE} || exit
}

spcd_install_packages_tools() {
    spcd_step "Install packages tools"
    spcd_install_package "${SPCD_PKG_PKG}"
}

spcd_install_ca_certificates() {
    spcd_step "Install CA"
    spcd_install_package "${SPCD_PKG_CA}"
}

spcd_write_ca_certificates() {
    spcd_step "Write CA certificates"
    spcd_mkdir "${SPCD_CA_ROOT}"
    while true; do
        spcd_wcc__index=$((spcd_wcc__index + 1))
        eval "spcd_wcc__text=\"\${SPCD_CA_${spcd_wcc__index}}\""
        [ -n "${spcd_wcc__text}" ] || break
        spcd_wcc__path="${SPCD_CA_ROOT}/${spcd_wcc__index}.crt"
        spcd_split
        spcd_write "${spcd_wcc__path}" "${spcd_wcc__text}"
        spcd_openssl "${spcd_wcc__path}"
    done
}

spcd_update_ca_certificates() {
    spcd_step "Update CA certificates"
    ${SPCD_CMD_CA} || exit
}

spcd_set_https_verification_on() {
    spcd_step "Set HTTPS verification on"
    spcd_rm "${SPCD_PM_HTTPS_PATH}"
}

spcd_upgrade_packages() {
    spcd_step "Upgrade packages"
    ${SPCD_PM_UPGRADE} || exit
}

spcd_install_dos2unix() {
    spcd_step "Install dos2unix"
    spcd_install_package "${SPCD_PKG_DOS2UNIX}"
}

spcd_install_git() {
    spcd_step "Install Git"
    spcd_install_package "${SPCD_PKG_GIT}"
}

spcd_install_python() {
    spcd_step "Install Python"
    spcd_install_package "${SPCD_PYTHON_PACKAGE}"
    spcd_split
    spcd_ln_python "${SPCD_PYTHON_COMMAND}"
    # venv
    spcd_step "Install Python virtual environment"
    case "${SPCD_OS_ID}" in
    "${SPCD_OS_DEBIAN}" | "${SPCD_OS_UBUNTU}")
        spcd_install_package "python3-venv"
        ;;
    *) ;;
    esac
    spcd_split
    spcd_write "/etc/pip.conf" "\
[global]
index-url = ${SPCD_URL_PYTHON}
"
    spcd_split
    "${SPCD_PYTHON_ALIAS}" -m "venv" "${SPCD_PYTHON_VENV}"
    spcd_split
    export PATH="${SPCD_PYTHON_VENV_BINARIES}:${PATH}"
    export VIRTUAL_ENV="${SPCD_PYTHON_VENV}"
}

spcd_install_python_modules() {
    spcd_step "Install Python modules"
    spcd_ipm__root="$(mktemp --directory)" || exit
    spcd_ipm__target="${SPCD_PYTHON_VENV_PACKAGES}"
    echo "→ ${spcd_ipm__root}"
    for spcd_ipm__repository in "${SPCD_GIT_MAIN}" "${SPCD_GIT_ROOT}"; do
        case "${spcd_ipm__repository}" in
        http*) spcd_ipm__url="${spcd_ipm__repository}" ;;
        */*) spcd_ipm__url="${SPCD_PROJECT_ROOT}/${spcd_ipm__repository}" ;;
        *) spcd_ipm__url="\
${SPCD_PROJECT_ROOT}/${SPCD_PROJECT_PATH}/${spcd_ipm__repository}" ;;
        esac
        spcd_ipm__name="$(basename "${spcd_ipm__url}")"
        spcd_split
        echo "\
${spcd_ipm__url}
↓"
        git clone \
            "${spcd_ipm__url}" \
            "${spcd_ipm__root}/${spcd_ipm__name}" ||
            exit
        spcd_ipm__path="${spcd_ipm__root}/${spcd_ipm__name}/${spcd_ipm__name}"
        echo "\
${spcd_ipm__path}
↓
${spcd_ipm__target}"
        cp --recursive "${spcd_ipm__path}" "${spcd_ipm__target}" ||
            exit
        # check matching of file and variable
        spcd_ipm__script="${spcd_ipm__root}/${spcd_ipm__name}/spcd.sh"
        if [ -f "${spcd_ipm__script}" ]; then
            spcd_split
            spcd_ipm__check="${spcd_ipm__root}/check.${SPCD_CMD_SUM}"
            "${SPCD_CMD_SUM}" "${spcd_ipm__script}" >"${spcd_ipm__check}"
            printf "%s" "${SPCD}" >"${spcd_ipm__script}"
            ls -l "${spcd_ipm__script}"
            dos2unix "${spcd_ipm__script}"
            ls -l "${spcd_ipm__script}"
            "${SPCD_CMD_SUM}" -c "${spcd_ipm__check}" || spcd_error_ci "SPCD"
        fi
    done
    spcd_split
    spcd_ls "${spcd_ipm__target}"
    spcd_split
    spcd_rm "${spcd_ipm__root}"
}

spcd_install_packages() {
    # epel
    spcd_step "Install EPEL"
    case "${SPCD_OS_ID}" in
    "${SPCD_OS_ALMA}" | "${SPCD_OS_ROCKY}")
        spcd_install_package "epel-release"
        [ -n "${SPCD_URL_EPEL}" ] && spcd_ip__epel="${SPCD_URL_EPEL}" ||
            spcd_ip__epel="https://dl.fedoraproject.org"
        spcd_sed "/etc/yum.repos.d/epel.repo" \
            "|^metalink|# metalink|" \
            "|https://download.example|${spcd_ip__epel}|" \
            "|^#baseurl|baseurl|"
        ;;
    *) ;;
    esac
    # bats
    spcd_step "Install BATS"
    spcd_install_package "bats"
    # graphviz
    spcd_step "Install GraphViz"
    spcd_install_package "graphviz"
    # plantuml
    spcd_step "Install PlantUML"
    spcd_install_package "plantuml"
    # rsync
    spcd_step "Install Rsync"
    spcd_install_package "rsync"
    # shell check
    spcd_step "Install ShellCheck"
    case "${SPCD_PM}" in
    "${SPCD_PM_DNF}") spcd_install_package "ShellCheck" ;;
    *) spcd_install_package "shellcheck" ;;
    esac
    # shfmt
    spcd_step "Install ShellFormat"
    case "${SPCD_OS_ID}" in
    "${SPCD_OS_ALMA}" | "${SPCD_OS_ROCKY}") ;;
    "${SPCD_OS_DEBIAN}")
        [ "${SPCD_OS_VERSION}" != "bullseye" ] && spcd_install_package "shfmt"
        ;;
    *) spcd_install_package "shfmt" ;;
    esac
    # ssh
    spcd_step "Install SSH"
    case "${SPCD_PM}" in
    "${SPCD_PM_APK}" | "${SPCD_PM_APT}")
        spcd_install_package "openssh-client"
        ;;
    "${SPCD_PM_DNF}") spcd_install_package "openssh-clients" ;;
    "${SPCD_PM_PACMAN}") spcd_install_package "openssh" ;;
    *) ;;
    esac
}

spcd_write_python_module() {
    spcd_step "Write Python module"
    for spcd_wpm__variable in \
        OS_ID OS_VERSION \
        PROJECT_ROOT PROJECT_PATH PROJECT_NAME \
        PYTHON_VENV_BINARIES PYTHON_VENV_PACKAGES \
        OPEN DOWN VERT SPLT __UP SHUT; do
        spcd_wpm__value="$(spcd_echo "SPCD_${spcd_wpm__variable}")"
        spcd_wpm__text="${spcd_wpm__text}${spcd_wpm__value}
"
    done
    for spcd_wpm__root in \
        "${SPCD_PYTHON_PACKAGES}" "${SPCD_PYTHON_VENV_PACKAGES}"; do
        spcd_write "${spcd_wpm__root}/env.py" "${spcd_wpm__text}
SPCD_STEP = $((SPCD_STEP + 1))
"
    done
}

spcd_switch_to_python() {
    spcd_step "Switch to Python"
    spcd_stp__name="$(basename "${SPCD_GIT_MAIN}")"
    echo "\
${SPCD_PATH}
↓
${SPCD_PYTHON_ALIAS} / ${spcd_stp__name}"
    "${SPCD_PYTHON_ALIAS}" -m "${spcd_stp__name}"
}

# functions

spcd_cat() {
    spcd_cat__file="${1}"
    if [ -n "${spcd_cat__file}" ]; then
        spcd_open "${spcd_cat__file}"
        cat "${spcd_cat__file}" || exit
        spcd_shut "${spcd_cat__file}"
    fi
}

spcd_echo() {
    if [ -n "${1}" ]; then
        for spcd_echo__name in "${@}"; do
            spcd_echo__text=""
            eval "spcd_echo__text=\"\${${spcd_echo__name}}\""
            echo "${spcd_echo__name} = \"${spcd_echo__text}\""
        done
    fi
}

spcd_error_ci() {
    echo "× CI: ${*}"
    exit "${SPCD_ERROR_CI}"
}

spcd_error_os() {
    spcd_error_os__variable="${1}"
    printf "× OS: "
    spcd_echo "${spcd_error_os__variable}"
    exit "${SPCD_ERROR_OS}"
}

spcd_grep_os() {
    spcd_grep_os__variable="${1}"
    [ -n "${spcd_grep_os__variable}" ] &&
        grep "^${spcd_grep_os__variable}=" "/etc/os-release" |
        sed "s|^${spcd_grep_os__variable}=||" |
            sed "s|^\"\(.*\)\"$|\1|"
}

spcd_install_package() {
    spcd_install_package__name="${1}"
    if [ -n "${spcd_install_package__name}" ]; then
        ${SPCD_PM_INSTALL} "${spcd_install_package__name}" || exit
        ${SPCD_PM_CLEAN} || exit
    fi
}

spcd_ln_python() {
    spcd_ln_python__command="${1}"
    if [ -n "${spcd_ln_python__command}" ]; then
        echo "→ ${SPCD_PYTHON_ALIAS} → ${spcd_ln_python__command}"
        ln -f -s "${spcd_ln_python__command}" \
            "/usr/bin/${SPCD_PYTHON_ALIAS}" || exit
    fi
}

spcd_ls() {
    spcd_ls__path="${1}"
    if [ -n "${spcd_ls__path}" ]; then
        spcd_open "${spcd_ls__path}"
        ls -a -l "${spcd_ls__path}" || exit
        spcd_shut "${spcd_ls__path}"
    fi
}

spcd_mkdir() {
    spcd_mkdir__path="${1}"
    if [ -n "${spcd_mkdir__path}" ]; then
        echo "→ ${spcd_mkdir__path}"
        mkdir --parents "${spcd_mkdir__path}" || exit
    fi
}

spcd_open() {
    echo "${SPCD_OPEN}${*}"
}

spcd_openssl() {
    spcd_openssl__file="${1}"
    if [ -f "${spcd_openssl__file}" ]; then
        openssl x509 \
            -in "${spcd_openssl__file}" \
            -noout -text ||
            exit
    fi
}

spcd_rm() {
    spcd_rm__path="${1}"
    if [ -e "${spcd_rm__path}" ]; then
        echo "← ${spcd_rm__path}"
        rm -r "${spcd_rm__path}" || exit
    fi
}

spcd_sed() {
    spcd_sed__file="${1}"
    shift
    if [ -f "${spcd_sed__file}" ]; then
        spcd_cat "${spcd_sed__file}"
        for spcd_sed__regex in "${@}"; do
            sed --in-place "s${spcd_sed__regex}g" "${spcd_sed__file}" &&
                spcd_cat "${spcd_sed__file}" || exit
        done
    fi
}

spcd_shut() {
    echo "${SPCD_SHUT}${*}"
}

spcd_split() {
    echo "${SPCD_SPLT}"
}

spcd_step() {
    SPCD_STEP=$((SPCD_STEP + 1))
    echo "\
${SPCD_DOWN}
${SPCD_VERT} ${SPCD_STEP} ${*}
${SPCD___UP}"
}

spcd_write() {
    spcd_write__file="${1}"
    spcd_write__text="${2}"
    if [ -n "${spcd_write__file}" ]; then
        [ -f "${spcd_write__file}" ] && spcd_cat "${spcd_write__file}"
        echo "→ ${spcd_write__file}"
        printf "%s" "${spcd_write__text}" >"${spcd_write__file}" || exit
        spcd_cat "${spcd_write__file}"
    fi
}

# constants

SPCD_BOX_DOWN="╭"
SPCD_BOX_LEFT="╴"
SPCD_BOX_RIGHT="╶"
SPCD_BOX_UP="╰"
SPCD_BOX_VERTICAL="│"

SPCD_ERROR_CI=1
SPCD_ERROR_OS=2

SPCD_OS_ALMA="alma"
SPCD_OS_ALPINE="alpine"
SPCD_OS_ARCH="arch"
SPCD_OS_DEBIAN="debian"
SPCD_OS_FEDORA="fedora"
SPCD_OS_OPENSUSE="opensuse"
SPCD_OS_ROCKY="rocky"
SPCD_OS_UBUNTU="ubuntu"

SPCD_PM_APK="apk"
SPCD_PM_APT="apt"
SPCD_PM_DNF="dnf"
SPCD_PM_PACMAN="pacman"
SPCD_PM_ZYPPER="zypper"

SPCD_PYTHON_VENV="/opt/venv"
SPCD_PYTHON_VENV_BINARIES="${SPCD_PYTHON_VENV}/bin"

SPCD_HORIZONTAL="────╌╌╌╌┄┄┄┄┈┈┈┈"

SPCD_OPEN="${SPCD_BOX_DOWN}${SPCD_BOX_LEFT}"
SPCD_DOWN="${SPCD_BOX_DOWN}${SPCD_HORIZONTAL}"
SPCD_VERT="${SPCD_BOX_VERTICAL}"
SPCD_SPLT="${SPCD_BOX_RIGHT}${SPCD_HORIZONTAL}"
SPCD___UP="${SPCD_BOX_UP}${SPCD_HORIZONTAL}"
SPCD_SHUT="${SPCD_BOX_UP}${SPCD_BOX_LEFT}"

# run
spcd_main