install.sh

#!/usr/bin/env bash

set -Eeuo pipefail

SCRIPT_DIR="$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" && pwd)"
# shellcheck source=scripts/common.sh
source "$SCRIPT_DIR/scripts/common.sh"

require_root
detect_target_user
touch "$LOG_FILE"
chmod 0644 "$LOG_FILE"

trap 'die "Installation failed near line $LINENO. See $LOG_FILE."' ERR

printf '%s %s installer\n' "$PROJECT_NAME" "$PROJECT_VERSION"
printf 'Target user: %s\n' "$TARGET_USER"

step "Checking operating system"
[ -r /etc/os-release ] || die "/etc/os-release was not found."
# shellcheck disable=SC1091
source /etc/os-release
[ "${ID:-}" = "debian" ] || die "This release supports Debian only. Detected: ${PRETTY_NAME:-unknown}"
case "${VERSION_ID:-}" in
    12|13) log "Supported Debian version detected: ${PRETTY_NAME}" ;;
    *) log "WARNING: untested Debian version detected: ${PRETTY_NAME}" ;;
esac

step "Installing packages"
mapfile -t packages < <(sed -e 's/[[:space:]]*#.*$//' -e '/^[[:space:]]*$/d' "$SCRIPT_DIR/dependencies.list")
[ "${#packages[@]}" -gt 0 ] || die "No packages found in dependencies.list."
export DEBIAN_FRONTEND=noninteractive
apt-get update
apt-get install -y --no-install-recommends "${packages[@]}"

step "Configuring sudo access"
usermod -aG sudo "$TARGET_USER"
sudoers_file="/etc/sudoers.d/writerdeck-${TARGET_USER}"
printf '%s ALL=(ALL:ALL) NOPASSWD: ALL\n' "$TARGET_USER" > "$sudoers_file"
chmod 0440 "$sudoers_file"
visudo -cf "$sudoers_file" >/dev/null

step "Installing writerdeckOS files"
install -d -m 0755 "$CONFIG_DIR"
if [ ! -s "$EDITOR_FILE" ]; then
    printf '%s\n' "/usr/bin/wordgrinder" > "$EDITOR_FILE"
fi
chmod 0644 "$EDITOR_FILE"

install -m 0755 "$SCRIPT_DIR/scripts/writerdeck-launch" /usr/local/bin/writerdeck-launch
install -m 0755 "$SCRIPT_DIR/scripts/wdmenu" /usr/local/bin/wdmenu
install -m 0755 "$SCRIPT_DIR/scripts/writerdeck-update" /usr/local/bin/writerdeck-update
install -d -m 0755 /usr/local/lib/writerdeckos
install -m 0644 "$SCRIPT_DIR/scripts/theme.sh" /usr/local/lib/writerdeckos/theme.sh
if [ ! -s "$CONFIG_DIR/theme" ]; then
    printf '%s\n' standard > "$CONFIG_DIR/theme"
fi
chmod 0644 "$CONFIG_DIR/theme"
# Generate the tmux colours from the saved theme, preserving a previous choice
# when the installer is run again.
# shellcheck disable=SC1091
. /usr/local/lib/writerdeckos/theme.sh
writerdeck_write_tmux_theme "$(writerdeck_theme_name)"
chmod 0644 "$CONFIG_DIR/tmux-theme.conf"
backup_once /etc/tmux.conf
install -m 0644 "$SCRIPT_DIR/config/tmux.conf" /etc/tmux.conf
install -m 0644 "$SCRIPT_DIR/config/writerdeck-profile.sh" /etc/profile.d/writerdeck.sh

step "Configuring tty1 autologin"
autologin_dir="/etc/systemd/system/getty@tty1.service.d"
install -d -m 0755 "$autologin_dir"
sed "s/@USER@/${TARGET_USER//\//\\/}/g" \
    "$SCRIPT_DIR/config/autologin.conf.in" \
    > "$autologin_dir/autologin.conf"
chmod 0644 "$autologin_dir/autologin.conf"
systemctl daemon-reload
systemctl enable getty@tty1.service >/dev/null

step "Configuring NetworkManager"
systemctl enable --now NetworkManager.service

step "Configuring console mouse support"
systemctl enable gpm.service >/dev/null
if ! systemctl restart gpm.service; then
    log "WARNING: GPM could not start immediately. It remains enabled and may start when a mouse device is available or after reboot."
fi

step "Configuring document and USB locations"
install -d -m 0755 /etc/skel/Documents
install -d -o "$TARGET_USER" -g "$TARGET_USER" -m 0755 "$TARGET_HOME/Documents"
install -d -o "$TARGET_USER" -g "$TARGET_USER" -m 0755 "$TARGET_HOME/.config/autostart"
install -d -o "$TARGET_USER" -g "$TARGET_USER" -m 0700 "$TARGET_HOME/.config/micro"

usb_link="$TARGET_HOME/USBs"
if [ -L "$usb_link" ]; then
    :
elif [ -e "$usb_link" ]; then
    log "WARNING: $usb_link exists and is not a symlink; leaving it unchanged."
else
    ln -s "/media/$TARGET_USER" "$usb_link"
    chown -h "$TARGET_USER:$TARGET_USER" "$usb_link"
fi

step "Installing udiskie user autostart"
install -d -o "$TARGET_USER" -g "$TARGET_USER" -m 0755 "$TARGET_HOME/.config/systemd/user"
cat > "$TARGET_HOME/.config/systemd/user/udiskie.service" <<'EOF'
[Unit]
Description=Automount removable media with udiskie
After=graphical-session-pre.target

[Service]
ExecStart=/usr/bin/udiskie --no-notify
Restart=on-failure
RestartSec=3

[Install]
WantedBy=default.target
EOF
chown "$TARGET_USER:$TARGET_USER" "$TARGET_HOME/.config/systemd/user/udiskie.service"
install -d -o "$TARGET_USER" -g "$TARGET_USER" -m 0755     "$TARGET_HOME/.config/systemd/user/default.target.wants"
ln -sfn ../udiskie.service     "$TARGET_HOME/.config/systemd/user/default.target.wants/udiskie.service"
chown -h "$TARGET_USER:$TARGET_USER"     "$TARGET_HOME/.config/systemd/user/default.target.wants/udiskie.service"
sudo -u "$TARGET_USER" XDG_RUNTIME_DIR="/run/user/$(id -u "$TARGET_USER")"     systemctl --user daemon-reload 2>/dev/null || true


step "Configuring console display"
cat > /etc/default/console-setup <<'EOF'
ACTIVE_CONSOLES="/dev/tty[1-6]"
CHARMAP="UTF-8"
CODESET="Lat15"
FONTFACE="Terminus"
FONTSIZE="12x24"
VIDEOMODE=
EOF
setupcon || log "WARNING: setupcon could not apply the console font immediately; it should apply after reboot."

step "Setting hostname"
hostnamectl set-hostname writerdeck
if grep -qE '^[[:space:]]*127\.0\.1\.1[[:space:]]+' /etc/hosts; then
    sed -i -E 's/^[[:space:]]*127\.0\.1\.1[[:space:]].*/127.0.1.1\twriterdeck/' /etc/hosts
else
    printf '127.0.1.1\twriterdeck\n' >> /etc/hosts
fi

step "Configuring GRUB"
if [ -f /etc/default/grub ]; then
    if grep -q '^GRUB_TIMEOUT_STYLE=' /etc/default/grub; then
        sed -i 's/^GRUB_TIMEOUT_STYLE=.*/GRUB_TIMEOUT_STYLE=menu/' /etc/default/grub
    else
        printf '\nGRUB_TIMEOUT_STYLE=menu\n' >> /etc/default/grub
    fi

    if grep -q '^GRUB_TIMEOUT=' /etc/default/grub; then
        sed -i 's/^GRUB_TIMEOUT=.*/GRUB_TIMEOUT=1/' /etc/default/grub
    else
        printf 'GRUB_TIMEOUT=1\n' >> /etc/default/grub
    fi
    update-grub
else
    log "No /etc/default/grub found; skipping GRUB configuration."
fi

step "Verifying required commands"
required=(tmux wordgrinder nvim hx kak udiskie nmtui whiptail setupcon gpm writerdeck-launch writerdeck-update wdmenu)
missing=()
for command_name in "${required[@]}"; do
    command -v "$command_name" >/dev/null 2>&1 || missing+=("$command_name")
done
if [ "${#missing[@]}" -gt 0 ]; then
    die "Installation finished with missing commands: ${missing[*]}"
fi

step "Installation complete"
cat <<EOF

writerdeckOS CE 3.0 has been installed for '$TARGET_USER'.

Default editor: $(cat "$EDITOR_FILE")
Install log:    $LOG_FILE

Restart to enter the writerdeck interface automatically.
Run 'wdmenu' from a shell to change the editor, appearance or network settings.
Run './uninstall.sh' from this project directory to remove writerdeckOS CE.
EOF

if [ -t 0 ]; then
    read -r -p "Restart now? [y/N]: " answer
    case "$answer" in
        [Yy]*) systemctl reboot ;;
    esac
fi