#!/bin/bash

PROGNAME=${0##*/}
VERSION="0.0.1"

# config variables
# you can set these according to your choice
nick=$USER # change this to your desired nick
path_to_twtxt=$HOME/twtxt.txt
url="https://example.com/twtxt.txt"
# list of getwtxt registries api
reg1="https://twtxt.envs.net/api/plain/"
reg2="https://twtxt.tilde.institute/api/plain/"


error_exit() {
    printf "%s: %s\n" "$PROGNAME" "${1:-"Unknown Error"}" >&2
    exit 1
}

usage() {
	printf "usage: %s [OPTIONS] COMMAND [ARGS]\n" "$PROGNAME" 
	printf "Simple client for twtxt\n"
	printf "Options:\n
  -c, --config PATH  Specify a custom config file location.
  -v, --verbose      Enable verbose output for debugging purposes.
  --version          Show the version and exit.
  -h, --help         Show this message and exit.

Commands:
  init        Setting up twtxt.
  config      Get or set config item.
  follow      Add a new source to your followings.
  following   Return the list of sources you’re following.
  timeline    Retrieve your personal timeline.
  tweet       Append a new tweet to your twtxt file.
  unfollow    Remove an existing source from your...
  view        Show feed of given source.
  reg list    Show registers
  reg add     Add your twtxt to registry
  reg users   List users on the registry
  reg twts    Fetch recent tweets from registry
  reg mentions search for mentions by url
  reg tag     Search for tags
  "
  
}



read_config () {
	declare -A v=()
	while read -r var value; do 
		v[$var]=$value
	done < $config/registry
}
case $1 in
	-h | --help)
		usage; exit ;;
	-* | --*)
        	usage; error_exit "unknown option $1" ;;
	init)
		printf "The config variables are stored in this script itself \n Enter yes if you want to open it now \n Enter no if you want to edit it yourself later\n"
		  while true; do
		         read -rp "$2 " yn
		         case $yn in
		             [Yy]*) open=1; break;;
		             [Nn]*) open=0; break;;
		             *) echo "Please answer yes or no" 
		         esac
		     done
		if [[ $open == 1 ]]
		then {
			if which twtxt-c &> /dev/null 
			then
			scriptpath=$(which twtxt-c) 
			else {
				read -p "Path to this script [`pwd`/twtxt-c]" scriptpath
				scriptpath=${scriptpath:-"`pwd`/twtxt-c"} 
				}
			fi
			if [ -z "$EDITOR" ]
				then
					{
					if which vim &> /dev/null 
					then
						vim $scriptpath
					elif which nvim &> /dev/null 
					then
						nvim $scriptpath
					elif which emacs &> /dev/null
					then
						emacs -nw $scriptpath
					elif which nano &> /dev/null
					then
						nano $scriptpath
					else 
						echo " EDITOR variable is empty and vim, neovim, emacs and nano not found. please open this script using your preferred text editor and set the config variables"
					fi
					echo "Now you can tweet using twtxt-c tweet <tweet>"
					}
			else 
				$EDITOR $scriptpath
				fi
		}
else 
	echo "Please edit the script and set nick, path to twtxt file and url for twtxt file"
fi
		echo "would you like to copy this script to $HOME/.local/bin [yes/no]"
		  while true; do
		         read -rp "$3 " yn
		         case $yn in
		             [Yy]*) copy=1; break;;
		             [Nn]*) copy=0; break;;
		             *) echo "Please answer yes or no" 
		         esac
		     done
		if [[ $copy == 1 ]]
		then {
			# give warning if path not ok
			if [[ $PATH != *"$HOME/.local/bin"* && $PATH != *"~/.local/bin"* ]]
			then
				echo " Warning: $HOME/.local/bin is not in PATH "
			fi
			# checking for scriptpath
			if which twtxt-c &> /dev/null 
			then
				echo "already present"
			elif [[ -z "$scriptpath" ]]
			then {
			read -p "Path to this script [`pwd`/twtxt-c]" scriptpath
			scriptpath=${scriptpath:-"`pwd`/twtxt-c"} 
				cp $scriptpath $HOME/.local/bin/
			}
			else
				cp $scriptpath $HOME/.local/bin/
			fi
		}
	     fi

	printf "Would you like to set the following aliases \n  ttc=twtxt-c timeline\n  twtc=twtxt-c tweet\n"
		  while true; do
		         read -rp "$3 " yn
		         case $yn in
		             [Yy]*) als=1; break;;
		             [Nn]*) als=0; break;;
		             *) echo "Please answer yes or no" 
		         esac
		     done
		if [[ $als == 1 ]]
		then {
			read -p "Path to alias file [$HOME/.bash_aliases]" alspath
			alspath=${alspath:-"$HOME/.bash_aliases"}
			echo "alias ttc='twtxt-c timeline'" >> $alspath
			echo "alias twtc='twtxt-c tweet'" >> $alspath
			}
		fi
		;;
	tweet)
		export config=/home/$USER/.config/twtxt-c/config
		printf "%s\t%s\n" "$(date +'%FT%T%:z')" "$2" >> $(awk '/twtfile/ {print $3}' $config)
		;;
	view)
		curl $2 2>/dev/null | grep -v "#" | awk 'BEGIN { FS = "\t" } ; {print $2}' 
		;;
	reg) 
		case $2 in
			list)
			cat /home/$USER/.config/twtxt-c/registry 
			;;
			add)
				config=/home/$USER/.config/twtxt-c/
				declare -A v=()
				while read -r line; do 
					var=$(echo $line | awk '{print $1}' )
					value=$(echo $line | awk '{print $3}' )
					v[$var]=$value
				done < $config/config
				req="https://twtxt.tilde.institute/api/plain/users?url=${v[url]}&nickname=${v[nick]}"
				req2="https://twtxt.envs.net/api/plain/users?url=${v[url]}&nickname=${v[nick]}"
				echo "post these requests:"
				echo "curl -X POST $req"
				echo "curl -X POST $req2"
				#curl -X POST $req
				#curl -X POST $req2
				# I have commented the actual curl request so that I accidentally re-register myself during testing
			;;
			users)
				curl 'https://twtxt.tilde.institute/api/plain/users' 
				curl 'https://twtxt.envs.net/api/plain/users' ;;
			twts)
				curl 'https://twtxt.tilde.institute/api/plain/tweets' 
				curl 'https://twtxt.envs.net/api/plain/tweets'
				;;
			mentions)
				url=$3
				req="https://twtxt.tilde.institute/api/plain/mentions?url=$url"
				req2="https://twtxt.envs.net/api/plain/mentions?url=$url"
				curl $req
				curl $req2
				;;
			tag)
				tag=$3 
				req="https://twtxt.tilde.institute/api/plain/tags/$tag"
				req2="https://twtxt.envs.net/api/plain/tags/$tag"
				curl $req
				curl $req2
				;;
		esac ;;
	*)
		printf "Work in progress\n" ;;
esac