#!/bin/bash
###
# This file is part of the code-cloppers openbox setup. Use at your own risk.
#
# This script should setup openbox for a user on ubuntu

set -eo pipefail

is-in-path() {
    which "$1" &>>/dev/null
}

install-apt-dependencies() {
    echo "=> Installing apt dependencies"
    set -x
    sudo apt-get update && \
	sudo apt-get install \
	     xcompmgr \
	     openbox \
	     rofi \
	     plank \
	     dunst \
	     numix-icon-theme-circle \
	     vorbis-tools \
	     sound-theme-freedesktop \
	     terminator \
	     xscreensaver \
	     nitrogen \
	     trayer
    set +x
}

are-in-path() {
    [[ $# -gt 0 ]] || return 0
    is-in-path "$1" || return 1
    shift
    are-in-path "$@"
}

asset-dirs-exist() {
    [[ -d /usr/share/icons/Numix-Circle ]] && [[ -d /usr/share/sounds/freedesktop ]]
}

install-dependencies() {
    echo "=> Checking dependencies"
    if ! are-in-path xcompmgr openbox dunst ogg123 terminator xscreensaver nitrogen \
	    || ! asset-dirs-exist; then
	install-apt-dependencies
    fi

    declare notify_send_dir=''
    notify_send_dir="$(local-dir)/applications/notify-send.sh"
    if ! [[ -d "$notify_send_dir" ]]; then
	mkdir -p "$notify_send_dir"
	git clone git@github.com:vlevit/notify-send.sh.git "$notify_send_dir" || rm "$notify_send_dir"
    fi
}

here() {
    dirname "$(readlink -f "${BASH_SOURCE[0]}")"
}

config-dir() {
    if ! [[ $# -ge 1 ]]; then
	echo "$(caller) Expected argument" >&2
	return 1
    fi
    
    declare app="$1"
    echo "$HOME/.config/$app"
}

create-dir-if-not-exists() {
    [[ -d $1 ]] || mkdir -p "$1"
}

copy-files-in-dir-to() {
    declare source="$1" destination="$2"
    create-dir-if-not-exists "$destination"
    cp -r "$source/"* "$destination"/
}

copy-config() {
    echo "=> Copying config"

    copy-files-in-dir-to "$(here)/config/openbox" "$(config-dir openbox)"
    copy-files-in-dir-to "$(here)/config/dunst" "$(config-dir dunst)"
    copy-files-in-dir-to "$(here)/config/terminator" "$(config-dir terminator)"
    cp -b "$(here)/config/xscreensaver/config-file" ~/.xscreensaver

    copy-files-in-dir-to "$(here)/config/gtk/gtk-3" "$(config-dir gtk-3.0)"
    cp -b "$(here)/config/gtk/gtk-2/rc" ~/.gtkrc-2.0
}

add-custom-startup() {
    declare startup_file=''

    [[ -z $startup_file ]] && startup_file="$HOME/.startup"
    printf '. "%s"\n' "$startup_file" >> "$(config-dir openbox)/autostart.sh"
}

os-is-ubuntu-1804() {
     [[ $(cat /etc/os-release | grep VERSION_ID | grep -Po '(?<=").*(?=")') == '18.04' ]]
}

cache-dir() {
    echo "$HOME/.cache/clopper-ob"
}

theme-dir() {
    echo "$HOME/.local/share/themes"
}

local-dir() {
    echo "$HOME/.local/share/clopper-ob"
}

create-theme-dir() {
    create-dir-if-not-exists "$(theme-dir)"
}

create-cache-dir() {
    create-dir-if-not-exists "$(cache-dir)"
}

create-local-dir() {
    create-dir-if-not-exists "$(local-dir)"
}

copy-bins-to-local-dir() {
    cp -r "$(here)/bin" "$(local-dir)/"
}

copy-libs-to-local-dir() {
    cp -r "$(here)/lib" "$(local-dir)/"
}

copy-themes-to-theme-dir() {
    cp -r "$(here)/themes"/* "$(theme-dir)/"
}

create-user-config-if-not-created() {
    if ! [[ -f ~/.code-clopper-ob ]]; then
	echo '=> Creating user config'
	echo -n > ~/.code-clopper-ob
    fi
}

config-get() {
    declare -u value_name="$1"
    grep -Po '(?<=^'"$value_name"'=")[^"]+(?="$)' ~/.code-clopper-ob
}

config-has() {
    config-get "$1" &>>/dev/null
}

config-add() {
    declare -u value_name="$1"
    declare value="$2"
    printf '%s="%s"\n' "$value_name" "$value" >> ~/.code-clopper-ob
}

check-config() {
    declare startup_script=''

    if ! config-has startup_script; then
	read -rep "Please provide a path to a custom startup script for your sessions (default: ~/.startup):" \
	     startup_script

	if [[ -z $startup_script ]]; then
	    startup_script="$HOME/.startup"
	fi
	
	config-add startup_script "$startup_script"
    fi

    if ! config-has desktop_background; then
	read -rep "Pleade provide a file to use as desktop background, leave blank for none: " \
	     background

	if [[ -z $background ]]; then
	    config-add desktop_background none
	else
	    config-add desktop_background "$background"
	fi
    fi
}

configure-dock() {
    declare dock_items=''
    [[ -d ~/.local/share/plank ]] || mkdir -p ~/.local/share/plank
    cp -r "$(here)/config/plank/themes" ~/.local/share/plank
    
    
    {
	cat "$(here)/config/plank/dconf-file"
	dconf dump /net/launchpad/plank/docks/dock1/ | grep ^dock-items
    } | dconf load /net/launchpad/plank/docks/dock1/
}

add-custom-background() {
    if [[ $(config-get desktop_background) != 'none' ]]; then
	printf 'nitrogen --set-auto %s\n' "$(config-get desktop_background)" \
	       >> "$(config-dir openbox)/autostart.sh"
    fi
}

setup-openbox-for-user() {
    install-dependencies
    copy-config
    create-cache-dir
    create-local-dir
    create-theme-dir
    copy-bins-to-local-dir
    copy-libs-to-local-dir
    copy-themes-to-theme-dir
    configure-dock
    create-user-config-if-not-created
    check-config
    add-custom-startup
    add-custom-background

    echo '=> Finished. You might want to run "openbox --restart" ' \
	 '(or for initial setup "openbox --exit" and then login again)'
}

setup-openbox-for-user