#! /bin/sh -e

. $(dirname $0)/common.sh

setenv status "scanning"

log "Scanning for DVD title"
title=$(dvdbackup -I | awk -F \" '/DVD with title/ {print $2}')
setenv title "$title"

# How big is this DVD?
totalSize=$(dvdbackup -I | awk '/[MK]iB$/ { b += $2 } END { print b }')

dvdbackup -p -F -n DVD \
| tr '\r' '\n' \
| awk -F '[ /:]+' '
    function update() {
      print "% " pct;
      fflush();
    }

    /Found [0-9]+ VTS/ {
      numTitles = $3;
      title = 1;
      pct = 0;
      print "# I found " numTitles " titles"
      update()
    }
    /Copying menu:/ {
      # Not sure how to know in advance how many of these there will be.
      print "# We are reading the menu: " $0
      update();
    }
    /Copying Title,/ {
      # Copying Title, part 1/5: 23% done (239/1024 MiB)
      part = $4
      parts = $5
      done = $6
      print "# Title " part " of " parts " pct " done
      titleDone = (part * 100 - 100 + done) / parts;
      if (titleDone < titleLast) {
        title += 1;
      }
      titleLast = titleDone;
      pct = (title * 100 - 100 + pctDone) / numTitles;
      update();
    }
    { 
      print "## " $0;
      update();
    }
    ' \
| while read t val; do
  case "$t" in
    "%") 
      setenv complete "$val" 
      echo "Complete: $val"
      ;;
    *) 
      echo "$t $val" 
      ;;
  esac
done