#!/usr/bin/env sh

######################################################################
# @author      : swytch
# @file        : texer
# @license     : MIT
# @created     : Wednesday May 20, 2020 18:26:30 CEST
#
# @description : create a LaTeX doc with generic metadata
#                open it with (neo)vim
######################################################################


if [ -z "$1" ]; then
	printf "Please provide a name for your file\n"
elif [ -e $1 ]; then
	printf "This filename is already taken, please provide a different name\n"
else
	touch "$1"
	printf '%%metadata' >> "$1"
	read -p "Which type is your document? (def: article) " class
	if [ -z "$class" ]; then
		class='article'
	fi
	printf "\n\\documentclass[a4paper, 12pt]{$class}" >> "$1"
	printf '\n' >> "$1"
	read -p "Do you want colors?(y/N) " colors
	if [ "$colors" = "y" ]; then
		printf '\n\usepackage[dvipsname]{xcolor}' >> "$1"
	fi
	read -p "Do you want hyperlinks management?(y/N) " links
	if [ "$links" = "y" ]; then
		if [ "$colors" != "y" ]; then
			printf '\n\usepackage[dvipsname]{xcolor}' >> "$1"
		fi
		printf '\n\usepackage[colorlinks=true, urlcolor=BrickRed]{hyperref}' >> "$1"
	fi
	read -p "Do you want bibliography management?(y/N) " bibliography
	if [ "$bibliography" = "y" ]; then
		read -p "Do you want to use apacite?(y/N) " apacite
		if [ $apacite = "y" ]; then
			printf '\n\usepackage{apacite}' >> "$1"
			bibstyle="apacite"
		else
			bibstyle="unsrt"
			printf '\nThe default style is _unsrt_ (you may change it at the end of the document)'
		fi
		bibfile="$(basename "$(find $HOME/documents/bibliographies/ -type f -not -path '*/\.*' | dmenu -l 20 -p "which bibliography?")")" # the -not -path allows find to ignore hidden files
		if [ -z "$bibfile" ]; then
			printf '\n'
			printf '\n##################################################'
			printf "\nDon't forget to specify the .bib file (\\bibliography{.bib}) at the end of the file          " | fold -w 46 | sed "s/$/\ \#/g" | sed "s/^/\#\ /g"
		printf '\n##################################################'
		printf '\n'
		fi
	fi
	read -p "Do you want to use another package? If so, please provide a package name; else, just press <Enter>: " package
	while [ -n "$package" ]; do
		printf "\n\usepackage{"$package"}" >> "$1"
		package=''
		read -p "Do you want to use another package? If so, please provide a package name: " package
	done
	printf '\n' >> "$1"
	printf '\n\\author{David JULIEN}' >> "$1"
	read -p "What is the title of the document? " title
	printf '\n\\title{"$title"}' >> "$1"
	printf '\n' >> "$1"
	printf '\n%%document' >> "$1"
	printf '\n\\begin{document}' >> "$1"
	printf '\n' >> "$1"
	printf '\n\\maketitle' >> "$1"
	printf '\n' >> "$1"
	if [ "$bibliography" = "y" ]; then
		printf '\n\bibliographystyle{$bibstyle}' >> "$1"
		printf '\n\bibliography{$HOME/documents/bibliographies/$bibfile}' >> "$1"
	fi
	printf '\n\end{document}' >> "$1"

	# check if neovim is installed
	if command -v nvim > /dev/null 2>&1; then
		nvim "$1"
	else
		vim "$1"
	fi
fi