#!/usr/bin/env bash

# This file should be bound to a keybinging
# It allows for follow up actions
#
# For example, after taking a screenshot, I may wish to
# * add a shadow
# * open in gimp
# * Apply tesseract ocr

# The file .local/share/lastaction will contain the last action and potentially relevant information about it such as the screenshot's path


# If this is true, the first is automatically taken
first=false

die(){
	echo "$@" > /dev/stderr
	exit 1
}

trimWhitespace(){
	sed -e 's/^[[:space:]]*//' -e 's/[[:space:]]*$//'
}

deleteEmptyLines(){
	sed '/^$/ d'
}

getSuggestions(){
	case "$1" in
		screenshot)
			printf "View\tsxiv\n"
			printf "add shadow\tscreenshotAddShadow\n"
			printf "OCR\tscreenshotOCR\n"
			;;
		password)
			echo "OTP	passwordOTP"
			;;
	esac
	
}

screenshotOCR(){
	file="$1"
	tesseract "$file" "$file"
	LINES=$(wc -l < "${file}.txt")
	if [ "$LINES" -eq 0 ]; then
		notify-send "ocr" "no text was detected\nimage file at $file"
		exit 1
	fi
	if [ -n "$WAYLAND_DISPLAY" ]; then
		cat "${file}.txt" | wl-copy
		echo -n "${file}.txt" | wl-copy --primary
	else
		cat "${file}.txt" | xclip -selection clipboard
		echo -n "${file}.txt" | xclip -selection primary
	fi
}

screenshotAddShadow(){
	file="$1"
	newfile="${file%.*}-withshadow.${file##*.}"
	[ ! -f "$file" ] && die "Can't find file"

	#tmpfile="$(mktemp)"
	convert "$file" \( +clone -background black -shadow 80x20+0+15 \) +swap -background transparent -layers merge +repage "$newfile"
	#convert "$tmpfile" -bordercolor none -border 32 "$newfile"
	#rm "$tmpfile"
	if [ -n "$WAYLAND_DISPLAY" ]; then
		# Copies the image to your clipboard (ctrl + v)
		wl-copy <  "$file"
		# Copies the filename to primary selection (shift + insert or middle mouse)
		echo -n "$file" | wl-copy --primary
	else
		# Copies the image to your clipboard (ctrl + v)
		xclip -selection clipboard -target image/png -i "$newfile"
		# Copies the filename to primary selection (shift + insert or middle mouse)
		echo -n "$newfile" | xclip -selection primary
	fi
	notify-send "New Shadow On Screenshot" "$newfile"
	echo "screenshot $newfile" > "$lastactionfile"
}

passwordOTP(){
	password-manager "$1" otp
}

[ "$1" == "--first" ] && first=true && shift
lastactionfile="${XDG_DATA_HOME:-$HOME/.local/share}/lastaction"
[ ! -f "$lastactionfile" ] && die "No last action"

lastaction="$(sed -n 1p "$lastactionfile")"
[ -z "$lastaction" ] && die "No last action"

action="$(echo "$lastaction" | cut -d ' ' -f 1)"
options="$(echo "$lastaction" | cut -d ' ' -f 2-)"

suggestions="$(getSuggestions "$action")"

torun=""
if [ "$(echo "$suggestions" | wc -l)" -le 1 ] || [ "$first" == "true" ]; then
	torun="$(echo "$suggestions" | sed -n 1p | cut -d '	' -f 2)"
else
	choice="$(echo "$suggestions" | cut -d '	' -f 1 | rofi -dmenu)"
	[ -z "$choice" ] && die "Exited without selection"
	torun="$(echo "$suggestions" | grep "^$choice" | cut -d '	' -f 2)"
fi

$torun $options