#!/bin/bash

# create_POV_data_files
# version - all .png files that don't contain 'preview' are processed
OIFS="$IFS"
IFS=$'\n'
cd "$(dirname "$0")"
clear
height_only=0
preset=0
pngcount=0
wscount=0
rename=0
download=0

echo ""
echo "Welcome! Let's make some POV images!"
echo ""
echo "Found these image files:"

# builds array of files and includes spaces in name apparently as shown in echo "***** line below
pngs=($(find . -maxdepth 1 -type f -name "*.png" ! -name "*preview*"))
	for strip in ${pngs[@]}; do echo "${strip##*/}"; done
# get number of files in array
files=${#pngs[@]}
echo ""

# If NO images in the folder, offer logo
if [[ $files -lt 1 ]]; then
	echo ""
	echo "OOPS! No .png image files found!"
	echo ""
	echo "Do you want to download a sample Star Wars logo image?"
	echo "Type y for yes,"
	echo "type q to quit,"
	read -p $'or press ENTER to start over..\n' dl
	case $dl in
		y) download=1;;
		q) exit;;
		*) exec "./create_POV_data_files";;
	esac
fi
if [[ $download == 1 ]]; then
	echo ""
	wget https://upload.wikimedia.org/wikipedia/commons/thumb/6/6c/Star_Wars_Logo.svg/1024px-Star_Wars_Logo.svg.png
	pngs=$"1024px-Star_Wars_Logo.svg.png"
fi

valid_option=0
while [[ $valid_option != 1 ]]; do
    echo "Please select the settings you want to create the POV image(s) with: "
    echo "1 - Preset 1 (height=144, length=39, offset=18)"
    echo "2 - Preset 2 (height=97,  length=63, offset=50)"
    echo "3 - Preset 3 (height=72,  length=50, offset=15)"
    echo "4 - Preset 4 (height=72,  length=50, offset=39)"
    echo "5 - Height entry only"
    echo "6 - Custom options"
    echo "q - to quit"
	read option
	case $option in
		"") echo "! Some option is needed. Please try again"; echo "";;
		1) height=144 length=39 offset=18 preset=1 valid_option=1;;
		2) height=97 length=63 offset=50 preset=1 valid_option=1;;
		3) height=72 length=50 offset=15 preset=1 valid_option=1;;
		4) height=72 length=50 offset=39 preset=1 valid_option=1;;
		5) height_only=1; valid_option=1;;
		6) valid_option=1;;
#		7) ------ ADDITIONAL USER PRESETS CAN BE ADDED HERE -------
#		8) ------ or move 5 & 6 down to keep them all together -------------
#      	height is amount of pixels in your blade,
#      	length is the length of that blade in the unit of the distance of your choosing (most common inches or centimeters)
#      	offset - the distance (same unit as L) from the bottom of the blade to the fulcrum (e.g. the joint you are swinging with)
		q) exit;;
		*) echo ""
			echo "! Not a valid option, Please try again,"
			echo "or type q to quit. "; echo "";;
	esac
done

validinput=0
while [[ $validinput != 1 ]] && [[ $preset == 0 ]]; do
	echo ""
	read -p $'How many pixels are in your blade? (Press ENTER for default 144)\n' height
	if [[ $height == "" ]]; then height=144 validinput=1; echo "Default 144"
	elif [[ $height == "q" ]]; then exit
	elif [[ $height -gt 576 ]]; then
		echo "! That is likely impossible."
		echo "  Please try again or type 'q' to quit.";	echo ""
	elif [[ $height -gt 264 ]]; then
		read -p $'Are you sure there are that many pixels?? (y/n)\n' too_many
		if [[ $too_many == "y" ]]; then validinput=1; else echo ""; fi
	elif [[ $height =~ ^[0-9]{1,3}$ ]]; then validinput=1
	else
		echo ""
		echo "! Not a valid option, Please try again,"
		echo "or type q to quit. "; echo ""
	fi
done

if [[ $height_only != 1 ]]; then
	validinput=0
	while [[ $validinput != 1 ]] && [[ $preset == 0 ]]; do
        echo ""
        echo "What is your preferred unit of measuring distance? (i - inches, c - cm) "
        read pref
        case $pref in
		"") echo "! Some option is needed. Please try again"; echo "";;
		i)  calc_len=$(printf %.0f "$((10**3 * $height * 100 / 144 * 100 / 254))e-3"); offset_default=18 validinput=1 units="inches";;
		c)  calc_len=$(printf %.0f "$((10**3 * $height * 100 / 144))e-3"); offset_default=46; validinput=1; units="centimeters";;
		q) exit;;
		*)  echo ""
		echo "! Not a valid option, Please choose inches or cm,"
		echo "or type q to quit. "; echo "";;
        esac
    done

	validinput=0
	while [[ $validinput != 1 ]] && [[ $preset == 0 ]]; do
		echo ""
		echo "How many $units is your blade? (Press ENTER for calculated default $calc_len)"
		read length
		if [[ $units == "inches" ]]; then max=48; else max=122; fi
		if [[ $length == "" ]]; then length=$calc_len validinput=1; echo "Default $calc_len"
		elif [[ $length == "q" ]]; then exit
		elif [[ $length -gt $max ]]; then
			echo "! That is likely impossible."
			echo "  Please try again or type 'q' to quit."
			echo ""
		elif [[ $length =~ ^[0-9]{1,3}$ ]]; then validinput=1
		else
			echo ""
			echo "! Not a valid option, Please try again,"
			echo "or type q to quit. "; echo ""
		fi
	done

	validinput=0
	while [[ $validinput != 1 ]] && [[ $preset == 0 ]]; do
        echo ""
        echo "How many "$units" distance from the bottom of the blade to the fulcrum?"
        echo "The fulcrum is the pivot point. (Press ENTER for default $offset_default) "
		read offset
		if [[ $units == "inches" ]]; then max=30; else max=76; fi
		if [[ $offset == "" ]]; then  offset=$offset_default validinput=1; echo "Default $offset_default"
		elif [[ $offset == "q" ]]; then exit
		elif [[ $offset -gt $max ]]; then
			echo "! That is likely impossible."
			echo "  Please try again or type 'q' to quit."
			echo ""
		elif [[ $length =~ ^[0-9]{1,3}$ ]]; then validinput=1
		else
			echo ""
			echo "! Not a valid option, Please try again,"
			echo "or type q to quit. "; echo ""
		fi
	done

else # height_only
	length=39 offset=18
fi

echo "Number of images to process: " $files
for process in "${pngs[@]}";do # this apparently is a no no
	pngname="${process##*/}"
	pngnoext="${pngname%.*}"
	pngbase=${pngnoext// /_}
	echo ""
	echo "Processing source image file: $pngname"
	echo ""
	cp $process ./maketmp.png
	echo "** renamed to maketmp.png for make"
	make IMAGE=./maketmp.png OPTIONS="--height=$height  --length=$length --offset=$offset"
	rm -- ./maketmp.png
	echo "*** removing maketmp.png now that we're done with it"
	mv ./preview.png ./${pngbase}_${height}_preview.png
	mv ./image.h ../styles/${pngbase}_${height}_FC_POV_data.h
	mv ./image_pgm.h ../styles/${pngbase}_${height}_SC_POV_data.h
	mv ./image_8bit.h ../styles/${pngbase}_${height}_8b_POV_data.h


	echo ""
	echo ""
	echo "Conversion DONE! Find your files as shown below."
	echo ""
	echo "preview image:"
	echo "	ProffieOS/pov_tools/"$pngbase"_"$height"_preview.png"
	echo "Full color image data file:"
	echo "	ProffieOS/styles/"$pngbase"_"$height"_FC_POV_data.h"
	echo "Single color image data file:"
	echo "	ProffieOS/styles/"$pngbase"_"$height"_SC_POV_data.h"
	echo "256 color image data file:"
	echo "	ProffieOS/styles/"$pngbase"_"$height"_8b_POV_data.h"
		echo ""
	echo ""
done # < process.txt
exit