#!/bin/sh

argv0="$0"
argv1="$1"

# cats out the configuration or {'\n', EOF} if it can't be found
stream_config(){
	cat "$HOME"/.xdg-sanity.conf 2>/dev/null \
		|| cat "$HOME"/.config/xdg-sanity.conf 2>/dev/null \
		|| cat /etc/xdg-sanity/xdg-sanity.conf 2>/dev/null \
		|| echo # empty line
}

# check if usage is valid
if ! test -n "$1"; then
	printf "Usage: %s [resource...]\n" "$argv0"
	exit 64 # sysexits(3) EX_USAGE
fi

# check if we have curl(1)
if ! command -v curl >/dev/null 2>&1; then
	printf "%s: Missing dependency: curl(1)\n" "$argv0"
	exit 71 # sysexits(3) EX_OSERR
fi

test -n "$BROWSER" || BROWSER="$(stream_config | sed -ne 's/^browser *= *//p')"

# check if we have a $BROWSER
if ! test -n "$BROWSER"; then
	printf "\
%s: \$BROWSER not filled.
	Please place the path to your default browser's executable in
	/etc/xdg-sanity/xdg-sanity.conf
" "$0"
	exit 71 # sysexits(3) EX_OSERR
fi

MIME="$(curl -s -o /dev/null -w '%{content_type}' $1 | sed 's/\;.*//' | xargs echo)"
# RESPONSE_CODE=$(curl -fLIs "$INPUT" | sed -ne 's/ [[:space:]]*$//p' | sed -ne 's|^HTTP/.\+ ||p')

for EXT in /etc/xdg-sanity/extensions/*.sh; do
	if [ "$EXT" = "/etc/xdg-sanity/extensions/*.sh" ]; then
		echo "No extensions to load"
	else
		for EXT in /etc/xdg-sanity/extensions/*.sh; do
			TYPE=$(cat $EXT | sed -ne 's/^# EXT-TYPE=//p' | tr -d '\n')
			echo "Found $TYPE extension $EXT"

			if [ "$TYPE" = "replace" ]; then
				echo "Modifying $INPUT..."
				argv1=$($EXT "$argv1")
				echo "Got $INPUT"
			elif [ "$TYPE" = "mime" ]; then
				echo "Modifying MIME type..."
				MIME="$($EXT "$argv1")"
				echo "Got $MIME"
			fi
		done
	fi

done

# determine the MIME type, strip everything after the first semicolon, and
# check to see if it's HTML
if [ "$MIME"= "text/html" ]; then
	$BROWSER "$1"
else
	handlr launch "$MIME" -- "$1"
fi