#!/usr/bin/env bash

. "$(git rev-parse --show-toplevel)/gitTools/functions"

CommentStart=`getAttribute CommentStart $1`

if [ _$CommentStart == _unspecified -o \
     _$CommentStart == _unset -o \
     _$CommentStart == _set ]; then
  cat 
  exit
fi

GAWK=`gitTool gawk`

if [ _"$GAWK" == _ ]; then
  cat 
  exit
fi

Date=`date -u +%Y`

# LastCommit=`git log -1 --date=short --pretty=format:"%ad" $1`
# LastCommit=(${LastCommit//-/ })
# LastCommit=${LastCommit[0]} 

# if [ _${LastCommit} == _${Date} -a \
#      `git log -1 --pretty=%at -- $1` -gt ${GitStart} ]; then
#   cat
#   exit;
# fi

LastCommit=${Date} 

FirstCommit=`git log --reverse --date=short --pretty=format:"%ad" $1 | head -n 1`
FirstCommit=(${FirstCommit//-/ })
FirstCommit=${FirstCommit[0]}
FirstCommit=${FirstCommit:-$Date} 

CommentEnd=`getAttribute CommentEnd $1`

if [ _$CommentEnd == _unspecified -o \
     _$CommentEnd == _unset -o \
     _$CommentEnd == _set ]; then
  CommentEnd=
fi

PrologEnd=`getAttribute PrologEnd $1`

if [ _$PrologEnd == _unspecified -o \
     _$PrologEnd == _unset -o \
     _$PrologEnd == _set -o \
     _$PrologEnd == _ ]; then
  PrologEnd=0
fi


function clean () {
  $GAWK -- '
BEGIN {
  Copyright = 0
  Prolog = "'$PrologEnd'"
  Skip = 0
}

function printCopyright(FirstCommit, LastCommit)
{
  while (LastCommit != 0) {
    if (LastCommit <= 2007) {
      if (FirstCommit != LastCommit) {      
        printf "'$CommentStart' Copyright (C) %d - %d by Pedro Mendes, Virginia Tech Intellectual '$CommentEnd'\n", FirstCommit, LastCommit
      } else {
        printf "'$CommentStart' Copyright (C) %d by Pedro Mendes, Virginia Tech Intellectual '$CommentEnd'\n", FirstCommit
      }

      printf "'$CommentStart' Properties, Inc. and EML Research, gGmbH. '$CommentEnd'\n"
      printf "'$CommentStart' All rights reserved. '$CommentEnd'\n"
      printf "\n"
      break;
    } else if (LastCommit <= 2009) {
      if (LastCommit == 2008 || FirstCommit == LastCommit) {
        printf "'$CommentStart' Copyright (C) %d by Pedro Mendes, Virginia Tech Intellectual '$CommentEnd'\n", LastCommit
      } else if (FirstCommit < 2008) {
        printf "'$CommentStart' Copyright (C) 2008 - %d by Pedro Mendes, Virginia Tech Intellectual '$CommentEnd'\n", LastCommit
      } else {
        printf "'$CommentStart' Copyright (C) %d - %d by Pedro Mendes, Virginia Tech Intellectual '$CommentEnd'\n", FirstCommit, LastCommit
      }

      printf "'$CommentStart' Properties, Inc., EML Research, gGmbH, University of Heidelberg, '$CommentEnd'\n"
      printf "'$CommentStart' and The University of Manchester. '$CommentEnd'\n"
      printf "'$CommentStart' All rights reserved. '$CommentEnd'\n"
      printf "\n"
      
      if (FirstCommit >= 2008) {
        break
      } else {
        LastCommit = 2007
      }
    } else if (LastCommit <= 2016) {
      if (LastCommit == 2010 || FirstCommit == LastCommit) {
        printf "'$CommentStart' Copyright (C) %d by Pedro Mendes, Virginia Tech Intellectual '$CommentEnd'\n", LastCommit
      } else if (FirstCommit < 2010) {
        printf "'$CommentStart' Copyright (C) 2010 - %d by Pedro Mendes, Virginia Tech Intellectual '$CommentEnd'\n", LastCommit
      } else {
        printf "'$CommentStart' Copyright (C) %d - %d by Pedro Mendes, Virginia Tech Intellectual '$CommentEnd'\n", FirstCommit, LastCommit
      }

      printf "'$CommentStart' Properties, Inc., University of Heidelberg, and The University '$CommentEnd'\n"
      printf "'$CommentStart' of Manchester. '$CommentEnd'\n"
      printf "'$CommentStart' All rights reserved. '$CommentEnd'\n"
      printf "\n"

      if (FirstCommit >= 2010) {
        break
      } else {
        LastCommit = 2009
      }
    } else if (LastCommit <= 2018) {
      if (LastCommit == 2017 || FirstCommit == LastCommit) {
        printf "'$CommentStart' Copyright (C) %d by Pedro Mendes, Virginia Tech Intellectual '$CommentEnd'\n", LastCommit
      } else if (FirstCommit < 2017) {
        printf "'$CommentStart' Copyright (C) 2017 - %d by Pedro Mendes, Virginia Tech Intellectual '$CommentEnd'\n", LastCommit
      } else {
        printf "'$CommentStart' Copyright (C) %d - %d by Pedro Mendes, Virginia Tech Intellectual '$CommentEnd'\n", FirstCommit, LastCommit
      }

      printf "'$CommentStart' Properties, Inc., University of Heidelberg, and University of '$CommentEnd'\n"
      printf "'$CommentStart' of Connecticut School of Medicine. '$CommentEnd'\n"
      printf "'$CommentStart' All rights reserved. '$CommentEnd'\n"
      printf "\n"

      if (FirstCommit >= 2017) {
        break
      } else {
        LastCommit = 2016
      }
    } else {
      if (LastCommit == 2019 || FirstCommit == LastCommit) {
        printf "'$CommentStart' Copyright (C) %d by Pedro Mendes, Rector and Visitors of the '$CommentEnd'\n", LastCommit
      } else if (FirstCommit < 2019) {
        printf "'$CommentStart' Copyright (C) 2019 - %d by Pedro Mendes, Rector and Visitors of the '$CommentEnd'\n", LastCommit
      } else {
        printf "'$CommentStart' Copyright (C) %d - %d by Pedro Mendes, Rector and Visitors of the '$CommentEnd'\n", FirstCommit, LastCommit
      }

      printf "'$CommentStart' University of Virginia, University of Heidelberg, and University '$CommentEnd'\n"
      printf "'$CommentStart' of Connecticut School of Medicine. '$CommentEnd'\n"
      printf "'$CommentStart' All rights reserved. '$CommentEnd'\n"
      printf "\n"

      if (FirstCommit >= 2019) {
        break
      } else {
        LastCommit = 2018
      }
    }
  }
}

$0 ~ "'$CommentStart' Copyright.*by Pedro Mendes" {
  skip = 2 
}

$0 ~ "('"$CommentStart"'|/\\*) Begin CVS Header" {
  skip = 2 
}

{
  if (skip == 1) {
    if ($0 !~ "^$") {
      if (Prolog == 0 && Copyright < 1) {
        printCopyright('$FirstCommit', '$LastCommit')
        Copyright = 1
      }

      print $0
    }

    skip = 0
  } else if (skip == 0) {
    if (Prolog == 0 && Copyright < 1) {
      printCopyright('$FirstCommit', '$LastCommit')
      Copyright = 1
    }

    print $0
  }    
}

$0 ~ "'$CommentStart' All rights reserved." {
  if (skip == 2) {
    skip = 1
  }
}

$0 ~ "End CVS Header" {
  if (skip == 2) {
    skip = 1
  }
}

$0 ~ Prolog {
  Prolog = 0
}'
}

cat | clean