#!/bin/bash
# shellcheck source=kz-common.sh
###############################################################################
# Pakket kz installeren.
#
# Geschreven door Karel Zimmer <info@karelzimmer.nl>.
###############################################################################

PROGRAM_PATH=$(realpath "$(dirname  "$0")")
readonly PROGRAM_PATH
if ! source "$PROGRAM_PATH"/kz-common.sh 2> /dev/null; then
    if ! wget   --no-verbose                        \
                --output-document=/tmp/kz-common.sh \
                'https://karelzimmer.nl/data/linux/scripts/kz-common.sh'; then
        printf '%s\n' 'Downloaden kz-common.sh is mislukt.'
        exit 1
    fi
    if ! source /tmp/kz-common.sh; then
        printf '%s\n' 'Inlezen kz-common.sh is mislukt.'
        exit 1
    fi
fi
readonly PROGRAM_NAME='kz-getdeb'
readonly DISPLAY_NAME=${PROGRAM_NAME/kz-/kz }
readonly RELEASE_YEAR=2016


###############################################################################
# Global constants
###############################################################################

readonly OPTIONS_SHORT=$OPTIONS_SHORT_COMMON
readonly OPTIONS_LONG=$OPTIONS_LONG_COMMON
readonly USAGE="Gebruik: $DISPLAY_NAME $OPTIONS_USAGE_COMMON
     of: wget karelzimmer.nl/kz
         bash kz
     of: wget karelzimmer.nl/kz; bash kz
     of: wget -O- karelzimmer.nl/kz | bash
     of: curl -L karelzimmer.nl/kz | bash
     of: zoek naar get en klik op Scripts installeren"
readonly HELP="Gebruik: $DISPLAY_NAME [OPTIE...]
     of: wget karelzimmer.nl/kz
         bash kz
     of: wget karelzimmer.nl/kz; bash kz
     of: wget -O- karelzimmer.nl/kz | bash
     of: curl -L karelzimmer.nl/kz | bash
     of: zoek naar get en klik op Scripts installeren

Pakket kz installeren.

Opties:
$OPTIONS_HELP_COMMON"

readonly UPLOADS_DISTDIR=$HOME/kz-uploads/dist


###############################################################################
# Global variables
###############################################################################


###############################################################################
# Functions
###############################################################################

function check_input {
    local -i    getopt_rc=0
    local       parsed=''

    parsed=$(
        getopt  --alternative                       \
                --options       "$OPTIONS_SHORT"    \
                --longoptions   "$OPTIONS_LONG"     \
                --name          "$DISPLAY_NAME"     \
                --              "$@"
        )       || getopt_rc=$?
    if [[ $getopt_rc -ne $SUCCESS ]]; then
        process_usage
        NOERROR=true exit $ERROR
    fi
    eval set -- "$parsed"
    process_common_options "$@"

    while true; do
        case $1 in
            --)
                shift
                break
                ;;
            *)
                shift
                ;;
        esac
    done

    if [[ "$*" ]]; then
        info 'Geen argumenten toegestaan.'
        process_usage
        NOERROR=true exit $ERROR
    fi

    clear -x
    check_user_root
    if ! check_user_sudo; then
        term_script
    fi
    check_on_ac_power
}


function check_on_ac_power {
    local -i on_battery=0

    on_ac_power &> /dev/null || on_battery=$?
    if [[ $on_battery -eq 1 ]]; then
        TEXT='De computer gebruikt nu alleen de accu voor de stroomvoorziening.

Geadviseerd wordt om de computer aan te sluiten op het stopcontact.'
        whiptail    --backtitle "$DISPLAY_NAME" \
                    --title     'Waarschuwing'  \
                    --msgbox    "$TEXT"         \
                    10 71
    fi
}


function check_sudo_and_dpkg {
    check_sudo
    check_dpkg
}


function check_sudo {
    if ! sudo -n true 2> /dev/null; then
        while true; do
            TEXT='
Authenticatie is vereist om pakket
kz met scripts en documenten van
Karel Zimmer te installeren.

Voer uw wachtwoord in:'
            # Constructie '3>&1 1>&2 2>&3' om stdout en stderr te wisselen.
            if printf '%s\n' "$(
                whiptail    --backtitle     "$DISPLAY_NAME"         \
                            --title         'Authenticatie nodig'   \
                            --ok-button     'Verifiëren'            \
                            --cancel-button 'Annuleren'             \
                            --passwordbox   "$TEXT"                 \
                            13 38                                   \
                            3>&1 1>&2 2>&3
                )" | sudo --stdin true 2> /dev/null; then
                break
            else
                clear -x
                TEXT='Er is een fout opgetreden.

Mogelijke oorzaak:
1. Geen of verkeerd wachtwoord ingevoerd
2. Op vorig scherm is <Annuleren> gekozen'
                if ! whiptail   --backtitle     "$DISPLAY_NAME" \
                                --title         'Fout'          \
                                --yes-button    'Opnieuw'       \
                                --no-button     'Stoppen'       \
                                --yesno         "$TEXT"         \
                                11 45; then
                    TEXT='Programma is gestopt door de gebruiker'
                    TERM=ansi whiptail  --backtitle "$DISPLAY_NAME" \
                                        --title     'Gestopt'       \
                                        --infobox   "$TEXT"         \
                                        7 42
                    NOERROR=true exit $ERROR
                fi
            fi
        done
    fi
}


function check_dpkg {
    local -i wait_for_aptd=5

    if ls /snap/core/*/var/cache/debconf/config.dat &> /dev/null; then
        while sudo  fuser                                                   \
                    /var/{lib/{dpkg,apt/lists},cache/apt/archives}/lock*    \
                    /var/cache/debconf/config.dat                           \
                    /snap/core/*/var/cache/debconf/config.dat               \
                    &> /dev/null; do
            TEXT="Wacht tot andere pakketbeheerder klaar is (kan even \
duren)..."
            TERM=ansi whiptail  --backtitle "$DISPLAY_NAME" \
                                --title     'Voortgang'     \
                                --infobox   "$TEXT"         \
                                7 65
            sleep $wait_for_aptd
        done
    else
        while sudo  fuser                                                   \
                    /var/{lib/{dpkg,apt/lists},cache/apt/archives}/lock*    \
                    /var/cache/debconf/config.dat                           \
                    &> /dev/null; do
            TEXT="Wacht tot andere pakketbeheerder klaar is (kan even \
duren)..."
            TERM=ansi whiptail  --backtitle "$DISPLAY_NAME" \
                                --title     'Voortgang'     \
                                --infobox   "$TEXT"         \
                                7 65
            sleep $wait_for_aptd
        done
    fi
}


function process_input {
    install_scriptspackage
}


function install_scriptspackage {
    local site_deb='https://karelzimmer.nl/downloads/kz/kz_365_all.deb'
    local temp_deb=''

    check_sudo_and_dpkg

    TEXT='Installeer pakket kz (kan even duren)...'
    TERM=ansi whiptail  --backtitle "$DISPLAY_NAME" \
                        --title     'Voortgang'     \
                        --infobox   "$TEXT"         \
                        7 44

    # Bij Live-sessie de universe repo aanzetten.
    if  [[ $HOSTNAME = 'ubuntu' && $USER = 'ubuntu' ]]; then
        sudo add-apt-repository --yes universe  |& $LOGCMD
        sudo apt-get update |& $LOGCMD
    fi

    # Installeer pakket kz.
    temp_deb=$(mktemp -t "$PROGRAM_NAME-XXXXXXXXXX.deb")
    wget --no-verbose --output-document="$temp_deb" $site_deb |& $LOGCMD
    sudo    DEBIAN_FRONTEND=noninteractive  \
            apt-get                         \
            reinstall                       \
            --yes                           \
            "$temp_deb"                     |& $LOGCMD
    rm "$temp_deb" |& $LOGCMD
}


function term_script {
    local srcdir=/usr/share/doc/kz
    local tgtdir=$HOME/kz-data

    mkdir --parents "$tgtdir" |& $LOGCMD

    # Populate with checklist.
    # Also 'kz-install --list' and 'kz-setup --list' will use this location.
    cp  $srcdir/Checklist*"$(lsb_release --id --short)"*    \
        "$tgtdir"                                           |& $LOGCMD || true
    TEXT="Pakket kz is succesvol geïnstalleerd.

Volg nu de stappen zoals beschreven
in de Checklist installatie.

Checklist installatie is te vinden:
- in de Persoonlijke map / kz-data
- in de map $srcdir
- op de site https://karelzimmer.nl,
  onder Linux

Typ 'exit' om dit venster te sluiten."
    TERM=ansi whiptail  --backtitle "$DISPLAY_NAME" \
                        --title 'Gereed'            \
                        --infobox "$TEXT"           \
                        18 41
    if developer; then
        check_dependencies
        pull_repos
        download_website
        info 'Status repos (gitstat)...'
        /home/karel/bin/gitstat
    fi
    exit $SUCCESS
}


function developer {
    local full_name=''

    # Aangemeld als ontwikkelaar?
    full_name=$(
        getent passwd karel             |
        cut --delimiter=':' --fields=5  |
        cut --delimiter=',' --fields=1  || true
        )
    if [[   $HOSTNAME == pc??                               &&
            ($USER = karel && $full_name = 'Karel Zimmer')  ]]; then
        return $SUCCESS
    else
        return $ERROR
    fi
}


function check_dependencies {
    if ! command -v fakeroot 1> /dev/null; then
        # Voor lz-build .deb.
        info 'Installeer fakeroot...'
        sudo apt-get install --yes fakeroot |& $LOGCMD
    fi
    if ! command -v ghostscript 1> /dev/null; then
        # Voor kz-build <man-pag>.pdf (ps2pdf).
        info 'Installeer ghostscript...'
        sudo apt-get install --yes ghostscript |& $LOGCMD
    fi
    if ! command -v git 1> /dev/null; then
        # Voor kz-getdeb eigen repo's.
        info 'Installeer git...'
        sudo apt-get install --yes git |& $LOGCMD
    fi
    if ! command -v lftp 1> /dev/null; then
        # Voor kz-getdeb/kz-deploy download/upload website.
        info 'Installeer lftp...'
        sudo apt-get install --yes lftp |& $LOGCMD
    fi
    if ! command -v pycodestyle 1> /dev/null; then
        # Voor kz-ivp check Python scripts.
        info 'Installeer pycodestyle...'
        sudo apt-get install --yes pycodestyle |& $LOGCMD
    fi
    if ! command -v shellcheck &> /dev/null; then
        info 'Installeer shellcheck...'
        # Debian's pakket is oud, snap is nieuwer.
        sudo snap install shellcheck |& $LOGCMD
    fi
}


function pull_repos {
    local bin_repo=/home/karel/bin

    info 'Pull repos (gitpull)...'
    git config --global pull.ff only |& $LOGCMD
    git config --global credential.helper store |& $LOGCMD
    if ! git    clone                                   \
                https://github.com/karelzimmer/bin.git  \
                "$bin_repo"                             |& $LOGCMD; then
        cd "$bin_repo"
        git pull |& $LOGCMD
    fi
    /home/karel/bin/gitpull |& $LOGCMD
}


function download_website {
    local ftp_set='set ssl:verify-certificate no'
    local ftp_from=/httpdocs
    local ftp_to=$UPLOADS_DISTDIR
    local ftp_opts='--delete --verbose'
    local ftp_cmd="mirror $ftp_opts $ftp_from $ftp_to; exit"
    local ftp_host=server106.hosting2go.nl
    local ftp_user=kzimmer
    local ftp_login=$HOME/.kz-$ftp_host

    info 'Download website (lftp)...'
    if ! command -v lftp 1> /dev/null; then
        sudo apt-get install --yes lftp |& $LOGCMD
    fi
    if ! [[ -f $ftp_login ]]; then
        # < /dev/tty want FD 1 al in gebruik bij 'wget -O- karelzim... | bash'.
        read -rsp "Wachtwoord voor 'ftp://$ftp_host': " < /dev/tty
        printf '%s\n' "$REPLY" > "$ftp_login"
        printf '\n'
        chmod 'u=rw,g=,o=' "$ftp_login" |& $LOGCMD
    fi
    if ! lftp   --user "$ftp_user"                  \
                --password "$(cat "$ftp_login")"    \
                -e "$ftp_set; $ftp_cmd"             \
                "$ftp_host"                         |& $LOGCMD; then
        rm  "$ftp_login"
        info 'Downloaden website is mislukt.'
        info 'Controleer de log...!'
        return  $ERROR
    fi
}


###############################################################################
# Script
###############################################################################

function main {
    init_script "$@"
    check_input "$@"
    process_input
    term_script
}

main "$@"