#! /usr/bin/env sh

set "cd" "rwx"

cd_main () {
    cd_set_environment
    cd_set_dns_resolving \
    "9.9.9.9"
    cd_set_packages_repositories
    cd_set_packages_configuration
    cd_set_https_verification_off
    cd_update_packages_catalog
    cd_install_packages_tools
    cd_install_ca
    cd_update_ca
    cd_set_https_verification_on
    cd_update_packages_catalog
    cd_upgrade_packages
    cd_install_git
    cd_install_python
    cd_clean_packages_cache
    cd_install "${@}"
    cd_bootstrap "${@}"
}

#

cd_set_environment () {
    cd_step "Set environment"
    CD_DNS_FILE="/etc/resolv.conf"
    case "${CD_OS_NAME}" in
        "debian")
            CD_PYTHON_COMMAND="python3"
            CD_PYTHON_PACKAGES="/usr/lib/python3/dist-packages"
            case "${CD_OS_VERSION}" in
                "bookworm")
                    echo "TODO"
                ;;
                *)
                    echo "CD_OS_VERSION"
                    exit 2
                ;;
            esac
        ;;
        *)
            echo "CD_OS_NAME"
            exit 1
        ;;
    esac
    # project / branch
    [ "${CI_COMMIT_BRANCH}" ] && CD_PROJECT_BRANCH="${CI_COMMIT_BRANCH}"
    [ "${GITHUB_REF_NAME}" ] && CD_PROJECT_BRANCH="${GITHUB_REF_NAME}"
    if [ ! "${CD_PROJECT_BRANCH}" ] ; then
        echo "CD_PROJECT_BRANCH"
        exit 3
    fi
    # project / name
    [ "${CI_PROJECT_PATH}" ] \
    && CD_PROJECT_NAME="$(basename "${CI_PROJECT_PATH}")"
    [ "${GITHUB_REPOSITORY}" ] \
    && CD_PROJECT_NAME="$(basename "${GITHUB_REPOSITORY}")"
    if [ ! "${CD_PROJECT_NAME}" ] ; then
        echo "CD_PROJECT_NAME"
        exit 3
    fi
    # projects / group
    [ "${CI_PROJECT_PATH}" ] \
    && CD_PROJECTS_GROUP="$(dirname "${CI_PROJECT_PATH}")"
    [ "${GITHUB_REPOSITORY}" ] \
    && CD_PROJECTS_GROUP="$(dirname "${GITHUB_REPOSITORY}")"
    if [ ! "${CD_PROJECTS_GROUP}" ] ; then
        echo "CD_PROJECTS_GROUP"
        exit 3
    fi
    # projects / url
    [ "${CI_SERVER_URL}" ] && CD_PROJECTS_URL="${CI_SERVER_URL}"
    [ "${GITHUB_SERVER_URL}" ] && CD_PROJECTS_URL="${GITHUB_SERVER_URL}"
    if [ "${CD_PROJECTS_URL}" ] ; then
        CD_PROJECTS_URL="${CD_PROJECTS_URL}/${CD_PROJECTS_GROUP}"
    else
        echo "CD_PROJECTS_URL"
        exit 3
    fi
    # project / url
    CD_PROJECT_URL="${CD_PROJECTS_URL}/${CD_PROJECT_NAME}"
}

cd_set_dns_resolving () {
local server
local text=""
    cd_step "Set DNS resolving"
    for server in "${@}" ; do
        text="${text}nameserver ${server}
"
    done
    cd_write "${CD_DNS_FILE}" "${text}"
}

cd_set_packages_repositories () {
    cd_step "Set packages repositories"
    case "${CD_OS_NAME}" in
        "debian")
            cd_write "/etc/apt/sources.list" "\
deb https://deb.debian.org/debian bookworm main
deb https://deb.debian.org/debian bookworm-backports main
deb https://deb.debian.org/debian bookworm-updates main
deb https://deb.debian.org/debian-security bookworm-security main
"
        ;;
        *) exit 1 ;;
    esac
}

cd_set_packages_configuration () {
    cd_step "Set packages configuration"
    case "${CD_OS_NAME}" in
        "debian")
            export DEBIAN_FRONTEND="noninteractive"
            cd_write "/etc/apt/apt.conf.d/apt.conf" "\
Acquire::Check-Valid-Until True;
APT::Get::Show-Versions True;
APT::Install-Recommends False;
APT::Install-Suggests False;
Dir::Etc::SourceParts \"\";
"
        ;;
        *) exit 1 ;;
    esac
}

cd_set_https_verification_off () {
    cd_step "Set HTTPS verification off"
    case "${CD_OS_NAME}" in
        "debian")
            cd_write "/etc/apt/apt.conf.d/https" "\
Acquire::https::Verify-Peer False;
"
        ;;
        *) exit 1 ;;
    esac
}

cd_update_packages_catalog () {
    cd_step "Update packages catalog"
    case "${CD_OS_NAME}" in
        "debian") apt-get update || exit ;;
        *) exit 1 ;;
    esac
}

cd_install_packages_tools () {
    cd_step "Install packages tools"
    case "${CD_OS_NAME}" in
        "debian") cd_install_package "apt-utils" ;;
        *) exit 1 ;;
    esac
}

cd_install_ca () {
    cd_step "Install CA"
    case "${CD_OS_NAME}" in
        "debian") cd_install_package "ca-certificates" ;;
        *) exit 1 ;;
    esac
}

cd_update_ca () {
    cd_step "Update CA"
    case "${CD_OS_NAME}" in
        "debian") update-ca-certificates ;;
        *) exit 1 ;;
    esac
}

cd_set_https_verification_on () {
    cd_step "Set HTTPS verification on"
    case "${CD_OS_NAME}" in
        "debian") rm "/etc/apt/apt.conf.d/https" ;;
        *) exit 1 ;;
    esac
}

cd_upgrade_packages () {
    cd_step "Upgrade packages"
    case "${CD_OS_NAME}" in
        "debian") apt-get upgrade --yes || exit ;;
        *) exit 1 ;;
    esac
}

cd_install_git () {
    cd_step "Install Git"
    case "${CD_OS_NAME}" in
        "debian") cd_install_package "git" ;;
        *) exit 1 ;;
    esac
}

cd_install_python () {
    cd_step "Install Python"
    case "${CD_OS_NAME}" in
        "debian") cd_install_package "python3" ;;
        *) exit 1 ;;
    esac
}

cd_clean_packages_cache () {
    cd_step "Clean packages cache"
    case "${CD_OS_NAME}" in
        "debian") apt-get clean || exit ;;
        *) exit 1 ;;
    esac
}

cd_install () {
local repository
local root
    cd_step "Install"
    root="$(mktemp --directory)" || exit
    for repository in "${@}" ; do
        git clone \
        "${CD_PROJECTS_URL}/${repository}" "${root}/${repository}" \
        || exit
        cp --recursive \
        "${root}/${repository}/${repository}" "${CD_PYTHON_PACKAGES}" \
        || exit
    done
    rm --force --recursive "${root}" || exit
}

cd_bootstrap () {
    cd_step "Bootstrap"
    "${CD_PYTHON_COMMAND}" -m "${1}"
}

#

cd_install_package () {
    if [ "${1}" ] ; then
        case "${CD_OS_NAME}" in
            "debian") apt-get install --yes "${1}" || exit ;;
            *) exit 1 ;;
        esac
    fi
}

cd_step () {
    if [ "${1}" ] ; then
        CD_STEP=$((CD_STEP+1))
        echo "
 ${CD_STEP} ${1}
"
    fi
}

cd_write () {
local file="${1}"
local text="${2}"
    if [ "${file}" ] ; then
        echo -n "${text}" \
        > "${file}" \
        || exit
    fi
}

#

cd_main "${@}"