#!/bin/sh

# Purpose {{{
## Try to centralize all game's save that respect XDG specifications in order to :
##	easily backup all save
##	easily restore it
##	be able to access it from anywhere
##	… all you can do with a Nextcloud (share, versionning,…)
##
## 1. Move save directories of a list of known games from XDG's
## directories to a remote directory (Nextcloud, remote mount,…).
## Then create a symlink in XDG directories to the remote game
## directory.
##
## 2. If a directory doesn't exist, check if a remote one is
## available and symlink it.
##
## KISS : Only manage save directories from Steam userdata. For other
## paths (Steam,…) check other scripts.
# }}}

# Vars {{{
debug=0

## XDG config {{{
XDG_CONFIG_HOME="${HOME}/.config"
xdg_config="$(printf "%s" "${XDG_CONFIG_HOME}" | sed -e "s;${HOME}/;;")"

config_games="..."
## }}}
## XDG data {{{
XDG_DATA_HOME="${HOME}/.local/share"
xdg_data="$(printf "%s" "${XDG_DATA_HOME}" | sed -e "s;${HOME}/;;")"

data_games="..."
## }}}

remote_dir="${HOME}/Nextcloud/games/linux.sgl.script"

# }}}

# Functions {{{
# Move one save game dir {{{
move_game_dir() {
	_game_name="${1}"
	_game_dir="${2}"
	_local_game_path="${HOME}/${_game_dir}/${_game_name}"
	_remote_game_path="${remote_dir}/${_game_dir}/${_game_name}"

	## If a remote directory doesn't already exists for this game
	if [ ! -d "${_remote_game_path}" ]; then
		### Ensure to create tree directories on remote storage
		mkdir -p -- "$(dirname "${_remote_game_path}")"
		### Move data to remote storage
		mv -- "${_local_game_path}" "${_remote_game_path}"
		[ "${debug}" -eq "0" ] && printf '\e[1;35m%-6s\e[m\n' "DEBUG : Move game − The data of ${_game_name} − ${_local_game_path} moved to remote storage."
		### Then ask to create a symbolic link to local storage
		symlink_game_dir "${_game_name}" "${_game_dir}"
	else
		printf '\e[1;35m%-6s\e[m\n' "Move game − ${_game_name} already have data on remote storage : ${_remote_game_path}. Abort to avoid to override data."
		exit 5
	fi
}
# }}}
# Symlink one save game dir from remote to local {{{
symlink_game_dir() {
	_game_name="${1}"
	_game_dir="${2}"
	_local_game_path="${HOME}/${_game_dir}/${_game_name}"
	_remote_game_path="${remote_dir}/${_game_dir}/${_game_name}"

	if [ -d "${_remote_game_path}" ]; then
		ln -s -- "${_remote_game_path}" "${_local_game_path}"
		[ "${debug}" -eq "0" ] && printf '\e[1;35m%-6s\e[m\n' "DEBUG : Symlink game — Symlink remote data of ${_game_name} to local storage."
	else
		[ "${debug}" -eq "0" ] && printf '\e[1;35m%-6s\e[m\n' "DEBUG : Symlink game — ${_game_name} doesn't have remote data."
	fi
}
# }}}

# }}}

# Tests {{{

## Ensure remote dir exist {{{
if [ ! -d "${remote_dir}" ]; then
	printf '\e[1;35m%-6s\e[m\n' "The directory for save game doesn't exists : ${remote_dir}"
	exit 1
fi
## }}}
## Ensure XDG directories exist {{{
for xdg_dir in "${xdg_config}" "${xdg_data}"; do
	local_xdg_path="${HOME}/${xdg_dir}"
	if [ ! -d "${local_xdg_path}" ]; then
		printf '\e[1;35m%-6s\e[m\n' "The XDG directory − ${xdg_dir} doesn't exists yet… Should it must be create (for restoration,…) [Y/n] ?"
		read -r create_local_xdg
		if [ "${create_local_xdg}" = "" ] || [ "${create_local_xdg}" = "Y" ] || [ "${create_local_xdg}" = "y" ]; then
			mkdir -p -- "${local_xdg_path}"
		else
			printf '\e[1;35m%-6s\e[m\n' "XDG directory (${xdg_dir}) doesn't exists, abort script."
			exit 2
		fi
	fi
done
## }}}

# }}}