#!/bin/bash
# ============LICENSE_START==========================================
# ===============================================================
#!/bin/bash

#set -x # uncomment for bash script debugging

# ============================================================================
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#       http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# ============LICENSE_END=====================================================

###
### warnstats
###
### AUTHOR(S):
### Thomas Kulik, Deutsche Telekom AG, 2020
###
### DESCRIPTION:
### warnstat helps to find the onap modules (projects) and rst-files which are
### responsible for the most warnings during the documentation build process
### it requires a tox build logfile, parses it line by line and prints out some
### statistics
###

###
### CHANGELOG (LATEST ON TOP)
###
### 1.3.1 (2020-03-10) fixed minor typo in usage message
### 1.3.0 (2020-03-09) initial release
###

script_version="1.3.1 (2020-03-10)"

echo " ";
echo "warnstats - Version ${script_version}";
echo " ";

declare -A module_array
declare -A message_short_array
declare -A message_long_array
declare -A rstfile_array

###
### simple script argument handling
###

logfile=$1;

# check if there is an argument at all
if [[ "$logfile" == "" ]] ; then
    echo 'Usage: warnstats [tox-logfile]'
    exit 1
fi

# check if argument is a file
if [ ! -f $logfile ] ; then
    echo "Error: can't find tox-logfile \"$logfile\""
    exit 1
fi

# read in the tox build logfile - use only lines which contain a warning
readarray -t logfile_array < <(grep ": WARNING:" $logfile);

# process filtered logfile line by line
for line in "${logfile_array[@]}"
do
    # count warning lines
    (( counter++ ));
    echo -n -e "lines processed: $counter\r";

    # extract module name from line
    module=$(echo "$line" | sed -r 's:^/.+/doc/docs/(submodules|guides)/::' | cut -f1 -d\/);

    # in case the extraction has no valid name fill the missing field
    if [[ "$module" == "" ]] ; then
        module="<missing_module_name>";
    fi

    # extract rst file name from line and do some formatting to use it later as an array name
    #echo "DBUG line: $line";
    rstfile=$(echo "$line" | grep -oP "[\w -]*\.rst");
    rstfile=$(echo -e ${rstfile} | tr '[:blank:]' '_');
    #echo "DBUG rst-file: $rstfile";

    # count the number of warnings for the module/rstfile combination
    (( rstfile_array[$module | $rstfile]++ ));

    # count the number of warnings for the single module
    #echo "DBUG $module | $rstfile | $message";
    (( module_array[$module]++ ));

    # extract the warning message and do some formatting
    #message=$(echo "$line" | sed -r 's:^/.+WARNING\:\ ::');
    message=$(echo "$line" | sed -r 's:^.+WARNING\:\ ::');
    message=$(echo -e ${message} | tr '[:blank:]' '_');
    message=$(echo -e ${message} | tr '/' '_');
    message=$(echo -e ${message} | tr '.' '_');

    # remove all characters from message which may cause problems in the shell
    message="$(echo -e "${message}" | sed -e 's/[^A-Za-z0-9_-]//g')";
    #echo "DBUG message=\"$message\""

    # count the number of warnings for the single message (long version)
    message_long="$(echo -e "${message}")";
    (( message_long_array[$message_long]++ ))

    # reduce length of message to group them more easily and then ...
    # count the number of warnings for the single message (short version)
    message_short="$(echo -e "${message}" | cut -c -20)";
    (( message_short_array[$message_short]++ ))

done

#format counter to have always x digits
counter=$(printf "%05d" $counter);
echo "                              ";
echo " $counter LINES WITH WARNING IN FILE '$logfile'";

echo " ";
echo "################################################################################";
echo "~~~ MESSAGES LONG ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~";
echo "################################################################################";
echo " ";

#print array content and append to temporary outfile
for i in "${!message_long_array[@]}"
do
  m=$i;
  n=${message_long_array[$i]};
  ((nc += n))
  #format counter to have always x digits
  n=$(printf "%05d" $n);
  echo " $n | $m" >>tempoutfile;
done

#format counter to have always x digits
nc=$(printf "%05d" $nc);
echo " $nc WARNINGS IN TOTAL WITH ${#message_long_array[@]} UNIQUE MESSAGES" >>tempoutfile;

#print a sorted version of the temporary outfile
sort -br tempoutfile

# clean up
rm tempoutfile
nc=0

echo " ";
echo "################################################################################";
echo "~~~ MESSAGES SHORTENED (FOR BETTER GROUPING) ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~";
echo "################################################################################";
echo " ";

#print array content and append to temporary outfile
for i in "${!message_short_array[@]}"
do
  m=$i;
  n=${message_short_array[$i]};
  ((nc += n))
  #format counter to have always x digits
  n=$(printf "%05d" $n);
  echo " $n | $m" >>tempoutfile;
done

#format counter to have always x digits
nc=$(printf "%05d" $nc);
echo " $nc WARNINGS IN TOTAL WITH ${#message_short_array[@]} UNIQUE MESSAGES" >>tempoutfile;

#print a sorted version of the temporary outfile
sort -br tempoutfile

# clean up
rm tempoutfile
nc=0

echo " ";
echo "################################################################################";
echo "~~~ MODULES ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~";
echo "################################################################################";
echo " ";

#create temporary outfile
for i in "${!module_array[@]}"
do
  m=$i;
  n=${module_array[$i]};
  ((nc += n))
  n=$(printf "%05d" $n);
  echo " $n | $m" >>tempoutfile;
done

#format counter to have always x digits
nc=$(printf "%05d" $nc);
echo " $nc WARNINGS IN TOTAL IN ${#module_array[@]} MODULES" >>tempoutfile;

#print a sorted version of the temporary outfile
sort -br tempoutfile
rm tempoutfile
nc=0

echo " ";
echo "################################################################################";
echo "~~~ MODULES WITH RSTFILES ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~";
echo "################################################################################";
echo " ";

#print array content and append to temporary outfile
for i in "${!rstfile_array[@]}"
do
  m=$i;
  n=${rstfile_array[$i]};
  ((nc += n))
  #format counter to have always x digits
  n=$(printf "%05d" $n);
  echo " $m | $n" >>tempoutfile;
done

#format counter to have always x digits
nc=$(printf "%05d" $nc);
#in case the name (e.g) index.rst is used multiple times in the same module warnings are combined
echo " $nc WARNINGS IN TOTAL IN APPROX. ${#rstfile_array[@]} RST FILES" >>tempoutfile;

#print a sorted version of the temporary outfile
sort -b tempoutfile

# clean up
rm tempoutfile
nc=0

echo " ";
echo "################################################################################";
echo "~~~ RSTFILES ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~";
echo "################################################################################";
echo " ";

#print array content and append to temporary outfile
for i in "${!rstfile_array[@]}"
do
  m=$i;
  n=${rstfile_array[$i]};
  ((nc += n))
  #format counter to have always x digits
  n=$(printf "%05d" $n);
  echo " $n | $m" >>tempoutfile;
done

#format counter to have always x digits
nc=$(printf "%05d" $nc);
#in case the name (e.g) index.rst is used multiple times in the same module warnings are combined
echo " $nc WARNINGS IN TOTAL IN APPROX. ${#rstfile_array[@]} RST FILES" >>tempoutfile;

#print a sorted version of the temporary outfile
sort -br tempoutfile

# clean up
rm tempoutfile
nc=0

echo " ";
exit

###
### backup code for future extensions
###

#
# Block_quote_ends_without_a_blank_line_unexpected_unindent
# Bullet_list_ends_without_a_blank_line_unexpected_unindent
# Citation_[\w-]_is_not_referenced
# Citation_unit_test_is_not_referenced
# Content_block_expected_for_the_code_directive_none_found
# Content_block_expected_for_the_container_directive_none_found
# Could_not_lex_literal_block_as_bash__Highlighting_skipped
# Could_not_lex_literal_block_as_console__Highlighting_skipped
# Could_not_lex_literal_block_as_guess__Highlighting_skipped
# Could_not_lex_literal_block_as_json__Highlighting_skipped
# Could_not_lex_literal_block_as_yaml__Highlighting_skipped
# Definition_list_ends_without_a_blank_line_unexpected_unindent
# document_isnt_included_in_any_toctree
# download_file_not_readable
# Duplicate_explicit_target_name
# duplicate_label
# Enumerated_list_ends_without_a_blank_line_unexpected_unindent
# Error_in_code_directive
# Error_in_code-block_directive
# Error_in_image_directive
# Explicit_markup_ends_without_a_blank_line_unexpected_unindent
# Field_list_ends_without_a_blank_line_unexpected_unindent
# Footnote_[0-9.*]_is_not_referenced
# image_file_not_readable
# Include_file
# Inconsistent_literal_block_quoting
# Inline_emphasis_start-string_without_end-string
# Inline_interpreted_text_or_phrase_reference_start-string_without_end-string
# Inline_strong_start-string_without_end-string
# Inline_substitution_reference_start-string_without_end-string
# Literal_block_ends_without_a_blank_line_unexpected_unindent
# Literal_block_expected_none_found
# Malformed_table
# Pygments_lexer_name_asn_is_not_known
# Title_level_inconsistent
# Title_overline__underline_mismatch
# Title_overline_too_short
# Title_underline_too_short
# toctree_contains_reference_to_nonexisting_document
# Too_many_autonumbered_footnote_references_only_0_corresponding_footnotes_available
# undecodable_source_characters_replacing_with
# undefined_label
# Unexpected_indentation
# Unknown_directive_type_clode-block
# unknown_document
# Unknown_target_name