#!/bin/bash

[ -z "${move+x}" ] && move=false
[ -z "${forcedate+x}" ] && forcedate=false
[ -z "${setdate+x}" ] && setdate=true
[ -z "${setoriginalfilename+x}" ] && setoriginalfilename=false
[ -z "${movecreatedate+x}" ] && movecreatedate=false
[ -z "${setartist+x}" ] && setartist=false



# Pathdefinitions Default
[ -z "${dest+x}" ] && dest=/srv/nfs/data/userdata/SHARED && dest=${dest%/}
[ -z "${mimedestpicdefault+x}" ] && mimedestpicdefault="Bilder"
[ -z "${mimedestviddefault+x}" ] && mimedestviddefault="Videos"
[ -z "${subdestdefault+x}" ] && subdestdefault="Familie"

# Pathdefinitions Runtime
[ -z "${mimedestpic+x}" ] && mimedestpic="${mimedestpicdefault}"
[ -z "${mimedestvid+x}" ] && mimedestvid="${mimedestviddefault}"
[ -z "${subdestpic+x}" ] && subdestpic="${subdestdefault}"
[ -z "${subdestvid+x}" ] && subdestvid="${subdestdefault}"

help () {
    cat << EOF
    Usage: $(basename $0) [move=[true|copy]] [setdate=[true|false]] [forcedate=[true|false]] [setoriginalfilename=[false|true|force]] [<file>]


    Defaults:
    # commands
    move=$move      [false|true|copy|rename|renameinplace|copyrename]   
                                                false: file is not moved to destination; 
                                                true: file is moved; copy: copy file to destination
                                                copy: copy file to final destinateion
                                                renameinplace: rename file to YYYYMMDD_HHmmss-c.ext in place (just rename file)
                                                rename: move like true, but rename ist like renameinplace
                                                copyrename: rename file in place and copy it to final destination with new name
    forcedate=$forcedate    [false|true]         false: datetimeoriginal and createdate is only updated from filename, if not set; true: tags are always updated
    setdate=$setdate        [false|true]        false: do not set date-tags, only if you are sure, tags are ok, and you want move or copy files; 
    setoriginalfilename=$setoriginalfilename   [false|true|force]        false: do not set originalfilename from filname (default); true: set it, if not set; force: set it, also if exists; 
    setartist=$setartist  [false|true|<User Name>]    true: set USERNAME from user, running the script; <User Name> set this User Name

    # destination
    dest=$dest
    mimedestpic=$mimedestpic
    mimedestvid=$mimedestvid

    subdestpic=$subdestpic
    subdestvid=$subdestvid

    # or set subdestdefault, which is default for subdestpic and subdestvid
    subdestdefault=$subdestdefault

    # final destinationpath
    ${dest}/${mimedestpic}/${subdestpic}/%Y/%Y_%m"
    ${dest}/${mimedestvid}/${subdestvid}/%Y/%Y_%m"

    Supported Filet-extensions
    *.jpg, *.jpeg, *.png, *.mp4, *.mov, *.3gp, *.gif

    Examples:
    
    # Scan current directory for all jpg|jpeg|mp4|mov|png|3gp|gif files, set datetimeoriginal and createdate
    $(basename $0)

    # set datetimeoriginal and createdate from given file (only one is possible)
    # only if tags are not set
    $(basename $0) <filename>

    # set datetimeoriginal and createdate from given file (only one is possible)
    # overwrite existing tags
    forcedate=true $(basename $0) <filename>

    # set datetimeoriginal and createdate from given file (only one is possible)
    # overwrite existing tags
    # move file to destination dir (${dest}/${mimedestpicdefault}/${subdestpic} or ${dest}/${mimedestviddefault}/${subdestvid}) in subdirectories %Y/%Y_%m/.
    move=true forcedate=true $(basename $0) <filename>

    # Final command to move File
    exiftool -o . '-Directory<DateTimeOriginal' -d ${dest}/${mimedestpic}/${subdestpic}/%Y/%Y_%m -filename -createdate -datetimeoriginal  -if '(\$datetimeoriginal)' <file>
    exiftool -o . '-Directory<DateTimeOriginal' -d ${dest}/${mimedestvid}/${subdestvid}/%Y/%Y_%m -filename -createdate -datetimeoriginal  -if '(\$datetimeoriginal)' <file>


EOF


}

export FILELOGLEVEL=WARN
export SCRIPT_LOG=~/logs/exif.log 

parsedatetime() {
    filename="$(basename "${@}")"
    # 2015-09-11_17:41:53-1.jpg
    # 2020.04.02_15-32-20+02:00.jpg
    # 2020.04.13_10-59-14+02:00.jpg
    # WhatsApp Image 2019-07-29 at 12.45.02.jpeg
    loginfo "fn: $filename"
    if [[ $filename =~ ^.*([0-9]{4})(\.|-)([0-9]{2})(\.|-)([0-9]{2})( |_|-|" at ")([0-9]{2})(\.|-|:)([0-9]{2})(\.|-|:)([0-9]{2})(\.|-|\+|\(| ).*$ ]]; then
        result="$(printf "%04d:%02d:%02d %02d:%02d:%02d"  "${BASH_REMATCH[1]#0}" "${BASH_REMATCH[3]#0}" "${BASH_REMATCH[5]#0}" "${BASH_REMATCH[7]#0}" "${BASH_REMATCH[9]#0}" "${BASH_REMATCH[11]#0}")"
    fi
    
    if [ -z "${result}" ]; then
        # signal-2020-08-09-171936.jpg
        if [[ $filename =~ ^.*([0-9]{4})(\.|-)([0-9]{2})(\.|-)([0-9]{2})( |_|-|" at ")([0-9]{2})([0-9]{2})([0-9]{2})(\.|-|\+|_|\(| ).*$ ]]; then
            result="$(printf "%04d:%02d:%02d %02d:%02d:%02d"  "${BASH_REMATCH[1]#0}" "${BASH_REMATCH[3]#0}" "${BASH_REMATCH[5]#0}" "${BASH_REMATCH[7]#0}" "${BASH_REMATCH[8]#0}" "${BASH_REMATCH[9]#0}")"
        fi
    fi

    if [ -z "${result}" ]; then
        if [[ $filename =~ ^.*([0-9]{4})([0-9]{2})([0-9]{2})(_|-)([0-9]{2})([0-9]{2})([0-9]{2}).*$ ]]; then
            result="$(printf "%04d:%02d:%02d %02d:%02d:%02d"  "${BASH_REMATCH[1]#0}" "${BASH_REMATCH[2]#0}" "${BASH_REMATCH[3]#0}" "${BASH_REMATCH[5]#0}" "${BASH_REMATCH[6]#0}" "${BASH_REMATCH[7]#0}")"
        fi
    fi

    if [ -z "${result}" ]; then
        # Whatsapp-Bilder
        # Whatsapp-Videos
        if [[ $filename =~ ^(IMG-|VID-)([0-9]{4})([0-9]{2})([0-9]{2})(-WA)([0-9]{2})([0-9]{2}).*$ ]]; then
            result="$(printf "%04d:%02d:%02d %02d:%02d:%02d"  "${BASH_REMATCH[2]#0}" "${BASH_REMATCH[3]#0}" "${BASH_REMATCH[4]#0}" "${BASH_REMATCH[6]#0}" "${BASH_REMATCH[7]#0}" "00")"
        fi
    fi

    if [ -z "${result}" ]; then
        # eYe20130323123316.jpg
        if [[ $filename =~ ^(eYe)([0-9]{4})([0-9]{2})([0-9]{2})([0-9]{2})([0-9]{2})([0-9]{2}).*$ ]]; then
            result="$(printf "%04d:%02d:%02d %02d:%02d:%02d"  "${BASH_REMATCH[2]#0}" "${BASH_REMATCH[3]#0}" "${BASH_REMATCH[4]#0}" "${BASH_REMATCH[5]#0}" "${BASH_REMATCH[6]#0}" "${BASH_REMATCH[7]#0}")"
        fi

    fi

    if [ -z "${result}" ]; then
        # ./2016-01-22/IMG_4225.jpg
        if [[ "$(dirname ${@})" =~ ^.*/([0-9]{4})(\.|-)([0-9]{2})(\.|-)([0-9]{2}).*$ ]]; then
            result="$(printf "%04d:%02d:%02d %02d:%02d:%02d"  "${BASH_REMATCH[1]#0}" "${BASH_REMATCH[3]#0}" "${BASH_REMATCH[5]#0}" "00" "00" "00")"
        fi
    fi


    echo "$result"
    return 0
}

run_fix () {
    file="${@}"
    mime="$(file --mime-type "$file" | awk '{print $NF}')"
    loginfo "file: $file : mime-type: $mime"

    newDateTimeOriginal="$(parsedatetime "$file")"
    loginfo "newDateTimeOriginal: $newDateTimeOriginal"
    case $mime in 
        image/png)
            MIMEDEST="${mimedestpic}/${subdestpic}"
            ;;
        image/jpeg)
            MIMEDEST="${mimedestpic}/${subdestpic}"
            ;;
        image/gif)
            MIMEDEST="${mimedestpic}/${subdestpic}"
            ;;
        video/mp4|video/m4a|video/3gpp|application/octet-stream)
            MIMEDEST="${mimedestvid}/${subdestvid}"
            ;;
        *)
            logwarn "unsupportet mimetype »${mime}« for »${file}«"
            ;;
    esac
    if [ -n "${MIMEDEST+x}" ] ; then

        case $setoriginalfilename in
            true)
                loginfo "set original filename: "
                $setoriginalfilename && exiftool -overwrite_original "-originalfilename<filename" -if '(not $originalfilename)' "$file"
                ;;
            force)
                loginfo "set original filename: "
                $setoriginalfilename && exiftool -overwrite_original "-originalfilename<filename" "$file"
                ;;
            *)
                logwarn "do not set original filname in case of setoriginalfilename=$setoriginalfilename"
                ;;
        esac

        case ${setartist:-false} in
            false)
                unset ARTIST
                ;;
            true)
                ARTIST="${FULLNAME:-$(getent passwd $USER|awk -F ":" '{print $5}'|awk -F "," '{print $1}')}"
                ;;
            *)
                ARTIST="$setartist"
                ;;
        esac
        
        [ -z "${ARTIST-x}" ] || exiftool -overwrite_original "-artist=$ARTIST" -if '(not $artist)' "$file"

        case $forcedate in
            true)
                loginfo -n "set datetimeoriginal to $newDateTimeOriginal"
                $setdate && [ -n "$newDateTimeOriginal" ] && exiftool -overwrite_original "-DateTimeOriginal=$newDateTimeOriginal" "$file"
                loginfo -n "set createdate to datetimeoriginal: "
                $setdate && exiftool -overwrite_original '-createdate<datetimeoriginal' -if '($datetimeoriginal)' "$file"
                loginfo -n "set datetimeoriginal to createdate: "
                $setdate && exiftool -overwrite_original '-datetimeoriginal<createdate' -if '(not $datetimeoriginal and $createdate)' "$file"
                ;;
            sensitive)
                if [[ $newDateTimeOriginal =~ ^([0-9]{4})(:)([0-9]{2})(:)([0-9]{2})( )([0-9]{2})(:)([0-9]{2})(:)([0-9]{2}).*$ ]]; then
                    YYYYMM="$(printf "%04d:%02d:*"  "${BASH_REMATCH[1]#0}" "${BASH_REMATCH[3]#0}")"
                    loginfo "YYYYMM: $YYYYMM"
                fi
                loginfo -n "set datetimeoriginal to $newDateTimeOriginal if not start with $YYYYMM"
                $setdate && [ -n "$newDateTimeOriginal" ] && exiftool -overwrite_original "-DateTimeOriginal=$newDateTimeOriginal" -if '(not $DateTimeOriginal =~ "'$YYYYMM'" )' "$file"
                loginfo -n "set createdate to datetimeoriginal: "
                $setdate && exiftool -overwrite_original '-createdate<datetimeoriginal' -if '($datetimeoriginal)' "$file"
                loginfo -n "set datetimeoriginal to createdate: "
                $setdate && exiftool -overwrite_original '-datetimeoriginal<createdate' -if '(not $datetimeoriginal and $createdate)' "$file"
                ;;
            *)
                loginfo -n "set datetimeoriginal to $newDateTimeOriginal"
                $setdate && [ -n "$newDateTimeOriginal" ] && exiftool -overwrite_original "-DateTimeOriginal=$newDateTimeOriginal" -if '(not $datetimeoriginal)' "$file"
                loginfo -n "set createdate to datetimeoriginal: "
                $setdate && exiftool -overwrite_original '-createdate<datetimeoriginal' -if '(($createdate =~ "0000:00:00*" or not $createdate) and $datetimeoriginal)' "$file"
                loginfo -n "set datetimeoriginal to createdate: "
                $setdate && exiftool -overwrite_original '-datetimeoriginal<createdate' -if '(not $datetimeoriginal and $createdate)' "$file"
                ;;
        esac

        loginfo "fileinfos from modified file: $(exiftool -filename -createdate -datetimeoriginal -originalfilename "$file")"


        case $move in
            true)
                export UMASK=002
                echo move to ${dest}/${MIMEDEST}/%Y/%Y_%m
                if $movecreatedate ; then
                    loginfo "$(exiftool '-Directory<CreateDate' -d ${dest}/${MIMEDEST}/%Y/%Y_%m -if '($CreateDate)' "$file" 2>&1 |tee -a ${LOGFILE})"
                else
                    loginfo "$(exiftool '-Directory<DateTimeOriginal' -d ${dest}/${MIMEDEST}/%Y/%Y_%m -if '($datetimeoriginal)' "$file" 2>&1 |tee -a ${LOGFILE})"
                fi
                ;;
            copy)
                export UMASK=002
                echo copy to ${dest}/${MIMEDEST}/%Y/%Y_%m
                if $movecreatedate ; then
                    loginfo "$(exiftool -o . '-Directory<DateTimeOriginal' -d ${dest}/${MIMEDEST}/%Y/%Y_%m -if '($datetimeoriginal)' "$file" 2>&1 |tee -a ${LOGFILE})"
                    logwarn "$(readlink -f "$file"): $(exiftool -filename -if '(not ($datetimeoriginal or $createdate))' "$file")"
                else
                    loginfo "$(exiftool -o . '-Directory<DateTimeOriginal' -d ${dest}/${MIMEDEST}/%Y/%Y_%m -if '($datetimeoriginal)' "$file" 2>&1 |tee -a ${LOGFILE})"
                    logwarn "$(readlink -f "$file"): $(exiftool -filename -if '(not ($datetimeoriginal or $createdate))' "$file")"
                fi
                ;;
            renameinplace)
                echo rename inplace
                if $movecreatedate ; then
                    loginfo "$(exiftool '-FileName<CreateDate' -d %Y%m%d_%H%M%S%%-c.%%e -if '($CreateDate)' "$file" 2>&1 | tee -a ${LOGFILE})"
                else
                    loginfo "$(exiftool '-FileName<DateTimeOriginal' -d %Y%m%d_%H%M%S%%-c.%%e -if '($DateTimeOriginal)' "$file" 2>&1 | tee -a ${LOGFILE})"
                fi
                ;;
            rename)
                export UMASK=002
                echo move to ${dest}/${MIMEDEST}/%Y/%Y_%m
                if $movecreatedate ; then
                    loginfo "$(exiftool -v '-FileName<CreateDate' -d ${dest}/${MIMEDEST}/%Y/%Y_%m/%Y%m%d_%H%M%S%%-c.%%e -if '($CreateDate)' "$file" 2>&1 | tee -a ${LOGFILE})"
                else
                    loginfo "$(exiftool -v '-FileName<DateTimeOriginal' -d ${dest}/${MIMEDEST}/%Y/%Y_%m/%Y%m%d_%H%M%S%%-c.%%e -if '($DateTimeOriginal)' "$file" 2>&1 | tee -a ${LOGFILE})"
                fi
                ;;
            copyrename)
                export UMASK=002
                echo move to ${dest}/${MIMEDEST}/%Y/%Y_%m
                if $movecreatedate ; then
                    loginfo "$(exiftool -o . '-FileName<CreateDate' -d ${dest}/${MIMEDEST}/%Y/%Y_%m/%Y%m%d_%H%M%S%%-c.%%e -if '($CreateDate)' "$file" 2>&1 | tee -a ${LOGFILE})"
                else
                    loginfo "$(exiftool -o . '-FileName<DateTimeOriginal' -d ${dest}/${MIMEDEST}/%Y/%Y_%m/%Y%m%d_%H%M%S%%-c.%%e -if '($DateTimeOriginal)' "$file" 2>&1 | tee -a ${LOGFILE})"
                fi
                ;;
            *)
                logwarn "value for move is neither »true« nor »copy«"
        esac
    fi

    loginfo "----------------"
    loginfo ""

}

run_check () {
    file="${@}"
    mime="$(file --mime-type "$file" | awk '{print $NF}')"
    loginfo "file: $file : mime-type: $mime"

    newDateTimeOriginal="$(parsedatetime "$file")"
    loginfo "search for DateTime-File: $newDateTimeOriginal"
    #echo $newDateTimeOriginal|sed -e 's/://g;s/ /_/'
    if [ $(find ${dest} -name "$(echo $newDateTimeOriginal|sed -e 's/://g;s/ /_/')*"|wc -l) -eq 0 ]; then
        loginfo " not found"
        echo "$@" |tee -a  holdfiles
    else
        loginfo " found"
        echo "$@" |tee -a  rmfiles
    fi


}

if [ $# -gt 0 ]; then
    case $1 in
        -h|help|--help)
            help
            ;;
        -c)
            shift
            loginfo "Check if createdate-file already exists"
            run_check "${@}"
            ;;
        *)
            loginfo "Progress only one file from cmdline ${@}"
            run_fix "${@}"
            ;;
    esac

else
    loginfo "Progress all *.jpg, *.jpeg, *.png and mp4, *.3gp, *.gif *.mov files in pwd $(pwd)"
    all=$(find ${maxdepth:+-maxdepth} ${maxdepth:+$maxdepth} -type f |grep -i ".jpg$\|.jpeg$\|.mp4$\|.mov$\|.png$\|.3gp$\|.gif$"|wc -l)
    find ${maxdepth:+-maxdepth} ${maxdepth:+$maxdepth} -type f |grep -i ".jpg$\|.jpeg$\|.mp4$\|.mov$\|.png$\|.3gp$\|.gif$"|while read file; do
        let "i=i+1"
        export SCRIPT_LOG=./$(basename $0).log
        export LOGFILE=./$(basename $0).move.log
        loginfo "$i/$all"
        run_fix "$file"
    done
fi