#################################################################
# Sync Changes, Part 1: run on PC, in Terminal or other, with:
#
#     bash sync-changes-part1-pc.sh
#
# Run this from any folder; it uses paths set in config-pc.txt,
# and finds sourced files in its own folder automatically.
#
# Step runtimes are shown in the console after step completion.  
# Step outputs go to files in $L; watch with 'tail -f $L/file'.
#
# Coding note: this creates deltas on the PC temporarily for 
# both speed and data-loss prevention.  Creating on the proxy
# seems nearly as good: using the PC adds a step to copy the
# deltas zip to the proxy; the deltas items must be copied to
# the proxy drive eventually in its content copy; and external
# SSDs are fast.  Still, USB data transfers are generally much 
# slower than PC buses, and metadata is more likely to make it 
# to the phone in a zip made on PC.  Don't use a $(mktemp -d)
# temp folder for this: hard to find if^H^H when things fail.
#
# Coding note: to shorten paths in zipfiles and hence on unzips,
# this can either cd to the content's folder, or use ziptools' 
# '-zip@.' arg to strip the path leading to the zipped item.
#
# See _README.html for license, attribution, and more docs.
#################################################################


mydir=$(dirname "$0")          # this script's own folder
source $mydir/config-pc.txt    # get settings for scripts run on PC
source $mydir/common.sh        # run code common to both PC and phone

rm -rf $F/DELTAS               # deltas temp on PC (deltas.py rms too)

# 'from' and 'to' must both exist here
if [ ! -e $F/$STUFF ]; then
    echo "The \$F/\$STUFF folder does not exist: $F/$STUFF"
    echo 'Exiting; please check the config file and rerun.'
    exit
fi
if [ ! -e $T/$STUFF ]; then
    echo "The \$T/\$STUFF folder does not exist: $T/$STUFF"
    echo 'Exiting; please check the config file and rerun.'
    exit
fi


#----------------------------------------------------------------
# Optional: offer to run nonportable-filenames fixer tool
#----------------------------------------------------------------

offerFixnamesRun    # common.sh


#----------------------------------------------------------------
# Optional: show PC~proxy deltas before saving or propagating
#----------------------------------------------------------------

previewChanges      # common.sh


#----------------------------------------------------------------
# 1) Make PC~proxy deltas with [deltas.py], storing in PC folder
#----------------------------------------------------------------

announce 'Making PC~proxy deltas'
time python3 $M/deltas.py $F/DELTAS $F/$STUFF $T/$STUFF -skipcruft \
                 > $L/$stamp--sync-1-pc-proxy-deltas-log.txt


#----------------------------------------------------------------
# 2) Apply deltas on PC to proxy with [mergeall.py -restore]
#----------------------------------------------------------------

announce 'Applying deltas to proxy'
time python3 $M/mergeall.py $F/DELTAS $T/$STUFF -restore -auto -skipcruft -backup -quiet \
                 > $L/$stamp--sync-2-apply-deltas-proxy-log.txt


#----------------------------------------------------------------
# 3) Zip deltas on PC with [zip-create.py -nocompress]
#----------------------------------------------------------------

announce 'Zipping deltas to proxy'
time python3 $Z/zip-create.py $F/DELTAS.zip $F/DELTAS -zip@. \
                 -skipcruft -nocompress \
                 > $L/$stamp--sync-3-zip-deltas-pc-log.txt


#----------------------------------------------------------------
# 4) Move deltas zip from PC to proxy
#----------------------------------------------------------------

printf '\nMoving deltas zip to proxy\n'    # zipping to proxy likely slower
time mv $F/DELTAS.zip $T/DELTAS.zip        # mv same as: rm -f; cp -pR; rm -rf

printf '\nRemoving deltas folder from PC (keeping zip on proxy)\n'
time rm -rf $F/DELTAS


#----------------------------------------------------------------
# Optional: verify content copied from PC to phone
#----------------------------------------------------------------

verifyPCtoProxy sync-4 sync-5    # common.sh, mergeall/diffall logfile names


printf "\nSee logs in $L, and run part 2 on your phone.\n"