install

#!/bin/bash
post_install_actions() {
	source ~/.bashrc
}

install_home() {
	local dest_dir="$HOME"
	local excluded="$(basename $0) README.md install update i3-config gtk-settings.ini i3 init_tmux launch_editor vim vimrc nvim psqlrc"

	local file
	for file in *; do
		if ! element_exists "$file" "$excluded"; then
			local dest_file_name=$(basename "$file" .tpl)
			local dest_file_path="$dest_dir/.$dest_file_name"
			read -p "add ${dest_file_name} to home? (Y/n) " -e ADD_FILE
			if [[ $ADD_FILE != "n" ]]; then
				install_file "$file" "$dest_file_path"
			fi
		fi
	done

	read -p "add psqlrc config? (Y/n) " ADD_FILE
	if [[ $ADD_FILE != "n" ]]; then
		mkdir -p "$dest_dir/.psql"
		install_file psqlrc "$dest_dir/.psqlrc"
	fi

	read -p "add vim config? (Y/n) " ADD_FILE
	if [[ $ADD_FILE != "n" ]]; then
		install_file vim "$dest_dir/.vim"
		install_file vimrc "$dest_dir/.vimrc"
	fi

	read -p "add i3 config? (Y/n) " ADD_FILE
	if [[ $ADD_FILE != "n" ]]; then
		mkdir -p "$dest_dir/.config/i3"
		install_file i3-config "$dest_dir/.config/i3/config"
		install_file i3 "$dest_dir/.i3"
	fi

	if [[ -d "$dest_dir/.config/gtk-3.0" ]]; then
		read -p "add gtk settings (sets system prefer dark mode for applications if system uses gtk)? (Y/n) " -e ADD_FILE
		if [[ $ADD_FILE != "n" ]]; then
			install_file gtk-settings.ini "$dest_dir/.config/gtk-3.0/gtk-settings.ini"
		fi
	fi

	read -p "add tmux startup script? (Y/n) " ADD_FILE
	if [[ $ADD_FILE != "n" ]]; then
		install_file init_tmux "$dest_dir/init_tmux"
	fi

	read -p "add launch editor script? (Y/n) " ADD_FILE
	if [[ $ADD_FILE != "n" ]]; then
		install_file launch_editor "$dest_dir/launch_editor"
	fi

	read -p "add neovim? (Y/n) " ADD_FILE
	if [[ $ADD_FILE != "n" ]]; then
		read -p "install neovim? (y/N) " INSTALL_NIGHTLY
		if [[ $INSTALL_NIGHTLY == "y" ]]; then
			curl -L -o /tmp/nvim-linux64.tar.gz https://github.com/neovim/neovim/releases/download/nightly/nvim-linux64.tar.gz
			sudo rm -rf /opt/nvim
			sudo tar -C /opt -xzf /tmp/nvim-linux64.tar.gz
			rm /tmp/nvim-linux64.tar.gz
		fi
		if ! which node &>/dev/null; then
			echo 'Node not found in path, it required to install neovim'
		else
			if [[ ! -d "$dest_dir/.config" ]]; then
				mkdir "$dest_dir/.config"
			fi
			install_file nvim "$dest_dir/.nvim"
			install_file nvim "$dest_dir/.config/nvim"

			if ! which pnpm &>/dev/null; then
				echo 'Installing pnpm'
				curl -fsSL https://get.pnpm.io/install.sh | sh -
			fi

			if ! which prettierd &>/dev/null; then
				echo 'Adding prettierd for ts/js/vue neovim formatting'
				pnpm install -g @fsouza/prettierd
			fi
			if ! which cspell &>/dev/null; then
				echo 'Adding cspell for code spelling checking'
				pnpm install -g cspell
			fi

			if ! which shfmt &>/dev/null; then
				echo 'package shfmt not found, install using local OS package manager for bash formatting'
			fi

			if ! which cargo &>/dev/null; then
				echo 'Cargo not found, skipping rust dependencys'
			else
				# add rust analyzer
				rustup component add rust-analyzer
			fi
		fi
	fi

	post_install_actions
}

install_file() {
	local file="$1"
	local dest_file_path="$2"
	if [[ -e $dest_file_path ]] ||
		[[ -L $dest_file_path ]]; then # Can be a broken symlink
		if [[ -e $dest_file_path ]] &&
			diff -q "$file" "$dest_file_path" >/dev/null; then
			echo "dotfiles: identical $dest_file_path"
		elif $replace_all; then
			replace_file "$file" "$dest_file_path"
		else
			read -p "dotfiles: overwrite ${dest_file_path}? [yn] "
			case $REPLY in
			'y') replace_file "$file" "$dest_file_path" ;;
			'n') echo "dotfiles: skipping $dest_file_path" ;;
			esac
		fi
	else
		link_file "$file" "$dest_file_path"
	fi
}

replace_file() {
	local file="$1"
	local dest_file_path="$2"
	remove "$dest_file_path"
	link_file "$file" "$dest_file_path"
}

link_file() {
	local file="$1"
	local dest_file_path="$2"
	if [[ $file =~ \.tpl$ ]]; then
		echo "dotfiles: generating $dest_file_path"
		bash "$file" >"$dest_file_path"
	else
		echo "dotfiles: linking $dest_file_path"
		ln -s "$(pwd)/$file" "$dest_file_path"
	fi
}

element_exists() {
	local elem="$1"
	shift
	local arr=($@)
	local i

	for i in ${arr[@]}; do
		if [[ $i == $elem ]]; then
			return 0
		fi
	done

	return 1
}

remove() {
	local file="$1"

	# Don't recursively remove symbolic links to directories,
	# just real directories.
	if [[ -d $file ]] && [[ ! -L $file ]]; then
		rm -rf "$file"
	else
		rm -f "$file"
	fi
}

install_home