create_POV_data_files PR :)

#!/bin/bash

# create_POV_data_files

cd "$(dirname "$0")"
clear
echo ""; echo "Welcome! Let's make some POV images!"; echo ""
# replace whitespace in source filename with underscores
find . -type f -name "* *" | while read file; do mv "$file" ${file// /_}; done
have_logo=0
height_only=0
preset=0
# get quantity of .png files and build array to print if multiples
files=$(ls 2>/dev/null -Ubad1 -- *.png | wc -l)
pngs=$(find . -type f -name '*.png')

if [ "$files" -ge 2 ]; then
    echo "OOPS! Too many .png image files found!"
    echo ""
    for strip in ${pngs[@]}; do
        no_path="${strip##*/}"
        echo ${no_path[*]}
    done
    echo ""
    echo "There needs to be only ONE source .png image in the pov_tools folder."
    echo ""
    echo "Type 'r' - to remove ALL FILES with 'preview' in the name. "
    echo "  If the additional filenames do not contain 'preview',"
    echo "  manually delete all files except your source image."
    echo ""
    echo "Type q to quit."
    read -p $'Press ENTER to start over.\n' fix
    case $fix in
        r) rm *preview*.png;
            echo ""
            echo "Files containing *preview* deleted if they existed"
            read -n 1 -r -s -p $'Press any key to continue.\n'
            exec "./create_POV_data_files";;
        q) exit;;
        *) exec "./create_POV_data_files";;
    esac
fi

if [ "$files" -lt 1 ]; then
    echo "OOPS! No .png image files found!"
    echo ""
    echo "Let's download an example Star Wars Logo for you to try :)"
    echo "DOWNLOADING: 1024px-Star_Wars_Logo.svg.png .........."
    echo ""
    wget https://upload.wikimedia.org/wikipedia/commons/thumb/6/6c/Star_Wars_Logo.svg/1024px-Star_Wars_Logo.svg.png&>/dev/null &
    logo=$"1024px-Star_Wars_Logo.svg.png"
    have_logo=1
    echo "Press q to quit, or"
    read -n 1 -r -s -p $'press any other key to continue...\n' delay
    if [ "$delay" = "q" ]; then exit; fi
fi

echo ""
case $have_logo in
    1) echo "Found the following source image file: $logo"
        echo ""
        sourcebase="${logo%.*}"
        image="$logo";;
    0)  source=$(find . -type f -name '*.png')
        for strip in ${source[@]}; do
            sourcename="${strip##*/}"
            sourcebase="${sourcename%.*}"
        done
        echo "Found the following source image file: ${sourcename[*]}"
        echo ""
        # check for multiples and for filename contains 'preview'
        recheck=$(ls 2>/dev/null -Ubad1 -- *.png | wc -l)
        if [[ $sourcename == *"preview"* ]]; then
            echo "OOPS! Source file name can not contain 'preview'."
            echo "Please use a different file name."
            echo "Press q to quit, or"
            read -n 1 -r -s -p $'press any key to try again.\n' retry
            if [ "$retry" = "q" ]; then exit; fi
            exec "./create_POV_data_files"
        elif [ $recheck -ge 2 ]; then
            exec "./create_POV_data_files"
        fi
        image="$sourcename";;
esac

valid_option=0

while [[ "$valid_option" != 1 ]]
do
    echo "Please select the settings you want to create the POV image 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 $option in
        "") echo "! Some option is needed. Please try again"; echo "";;
        1)  make IMAGE=$image OPTIONS="--height=144 --length=39 --offset=18"; HEIGHT=144 preset=1 valid_option=1;;
        2)  make IMAGE=$image OPTIONS="--height=97 --length=63 --offset=50"; HEIGHT=97 preset=1 valid_option=1;;
        3)  make IMAGE=$image OPTIONS="--height=72 --length=50 --offset=15"; HEIGHT=72 preset=1 valid_option=1;;
        4)  make IMAGE=$image OPTIONS="--height=72 --length=50 --offset=39"; HEIGHT=72 preset=1 valid_option=1;;
        5)  height_only=1; valid_option=1;;
        6)  valid_option=1;;
#       7) ------ ADDITIONAL USER PRESETS CAN BE ADDED HERE LIKE THIS-------
#       8) make IMAGE=$image OPTIONS="--height=H --length=L --offset=O"; HEIGHT=H preset=1 valid_option=1;;
#       9)       or move 5 & 6 down to keep them all together
#       *) H is amount of pixels in your blade,
#       *) L is the length of that blade in the unit of the distance of your choosing (most common inches or centimeters)
#       *) O is 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 ""
    echo "How many pixels are in your blade? (Press ENTER for default 144) "
    read  height
    if [[ $height == "" ]]; then height=144 length=39 offset=18 validinput=1; echo "Default 144"
    elif [[ $height == "q" ]]; then exit
    elif [[ $height -gt 264 ]] && [[ $height -le 576 ]]; then
        read -p "Are you sure there's that many pixels?? (y/n)" too_many
        if [[ $too_many == "y" ]]; then validinput=1; else echo ""; fi
    elif [[ $height -gt 576 ]]; then
        echo "! That is likely impossible."
        echo "  Please try again or type 'q' to quit."; echo ""
    elif [[ $height =~ ^[0-9]{1,3}$ ]]; then validinput=1
    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 * $height * 100 / 144 * 100 / 254))e-3"); offset_default=18; validinput=1; units="inches"; echo "";;
            c)  calc_len=$(printf %.0f "$((10**3 * $height * 100 / 144))e-3"); offset_default=46; validinput=1; units="centimeters"; echo "";;
            *[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 ]] && [[ $preset == 0 ]]
    do
        echo "How many "$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
            read -p "Are you sure your blade is that long?? (y/n) " too_long
            if [[ $too_long == "y" ]]; then validinput=1; else echo ""; fi
        elif [[ $length =~ ^[0-9]{1,3}$ ]]; then validinput=1
        else
            echo "! That is likely impossible."
            echo "  Please try again or type 'q' to quit."
            echo ""
        fi
    done

    validinput=0
    while [[ "$validinput" != 1 ]] && [[ $preset == 0 ]]
    do
        echo ""
        echo "How many "$units" is the distance from the bottom of the blade to the fulcrum?"
        echo "(The fulcrum is usually the swinging joint) (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
            read -p "Are you sure this distance is that long?? (y/n) " long_distance
            if [[ $long_distance == "y" ]]; then validinput=1; else echo ""; fi
        elif [[ $offset =~ ^[0-9]{1,3}$ ]]; then validinput=1
        else
            echo "! That is likely impossible."
            echo "  Please try again or type 'q' to quit."
            echo ""
        fi
    done
else # height_only
    length=39 offset=18
fi

if [ $preset == 0 ]; then make IMAGE=$image OPTIONS="--height=$height  --length=$length --offset=$offset"; HEIGHT=$height; fi
mv ./preview.png ./"${sourcebase}"_"${HEIGHT}"_preview.png
mv ./image.h ../styles/"${sourcebase}"_"${HEIGHT}"_FC_POV_data.h
mv ./image_pgm.h ../styles/"${sourcebase}"_"${HEIGHT}"_SC_POV_data.h
mv ./image_8bit.h ../styles/"${sourcebase}"_"${HEIGHT}"_8b_POV_data.h
echo ""
echo ""
echo "Conversion DONE! Find your files as shown below."
echo ""
echo "preview image:"
echo "  ProffieOS/pov_tools/"$sourcebase"_"$HEIGHT"_preview.png"
echo "Full color image data file:"
echo "  ProffieOS/styles/"$sourcebase"_"$HEIGHT"_FC_POV_data.h"
echo "Single color image data file:"
echo "  ProffieOS/styles/"$sourcebase"_"$HEIGHT"_SC_POV_data.h"
echo "256 color image data file:"
echo "  ProffieOS/styles/"$sourcebase"_"$HEIGHT"_8b_POV_data.h"
exit