#!/bin/bash
set -euo pipefail #x for debug

while getopts i:d:D: flag
do
    case "${flag}" in
        i) input_folder=${OPTARG};;
        d) days=${OPTARG};;
        D) delete=${OPTARG};;
    esac
done

if ! [[ -v input_folder ]] || ! [[ -v days ]] || ! [[ -v delete ]]
then
    echo "Arguments missing. Use -i for input folder, -D to define if you want to delete processed images and -d for number of days"
    exit
fi

if ! [[ delete=="true" ]]
then
    echo "WARNING old files will be deleted"
fi


echo "Input: $input_folder";
echo "Delete: $delete";
echo "Days: $days";

echo "Getting timelapse from $(date -d "now - $days days" +%d-%m-%Y) to $(date -d "now - 1 days" +%d-%m-%Y)";

mkdir -p ./timelapse_temp

out_name="$(date -d "now - $days days" +%d-%m-%Y)__$(date -d "now - 1 days" +%d-%m-%Y)_timelapse.mp4"
startdate=$(date -d "now - $days days" +%d%m%Y)
enddate=$(date -d "now - 1 days" +%d%m%Y)
d=
n=0
until [ "$d" = "$enddate" ]
do
    
    d=$(date -d "now - $days days" +%d%m%Y)
    day=$(date -d "now - $days days" +%d)
    month=$(date -d "now - $days days" +%m)
    year=$(date -d "now - $days days" +%Y)
    echo "Working on" $day $month $year
    if [[ delete!="true" ]]
    then
        cp $input_folder/Frame_${year}-${month}-${day}*.jpg ./timelapse_temp
    else
        echo "NOT YET IMPLEMENTED"
    fi
    days=$(($days - 1))
done


echo Output: $out_name
ffmpeg -r 25 -pattern_type glob -i "./timelapse_temp/*.jpg" -s 1920x1080 -vcodec libx264 -crf 23 ${out_name}

rm -rf ./timelapse_temp