#!/bin/bash

## Enable problem matcher

cd "$GITHUB_WORKSPACE" || exit 1

declare statuscode
declare -a filepaths
declare -a excludes
declare -a tmp

statuscode=0
shebangregex="^#! */[^ ]*/(env *)?[abkz]*sh"

excludes+=( ! -path *./.git/* )
excludes+=( ! -path *.go )
excludes+=( ! -path */mvnw )

for path in ${INPUT_IGNORE}; do
    echo "::debug:: Adding '${path}' to excludes"
    excludes+=(! -path "*./${path}/*" )
    excludes+=(! -path "*/${path}/*" )
done

readarray -d '' filepaths < <(find . -type f "${excludes[@]}" \
    '(' \
    \
    -name '*.bash' \
    -o -name '.bashrc' \
    -o -name 'bashrc' \
    -o -name '.bash_aliases' \
    -o -name '.bash_completion' \
    -o -name '.bash_login' \
    -o -name '.bash_logout' \
    -o -name '.bash_profile' \
    -o -name 'bash_profile' \
    -o -name '*.ksh' \
    -o -name 'suid_profile' \
    -o -name '*.zsh' \
    -o -name '.zlogin' \
    -o -name 'zlogin' \
    -o -name '.zlogout' \
    -o -name 'zlogout' \
    -o -name '.zprofile' \
    -o -name 'zprofile' \
    -o -name '.zsenv' \
    -o -name 'zsenv' \
    -o -name '.zshrc' \
    -o -name 'zshrc' \
    -o -name '*.sh' \
    -o -path '*/.profile' \
    -o -path '*/profile' \
    -o -name '*.shlib' \
       ')'\
    \
    -print0)

readarray -d '' tmp < <(find . "${excludes[@]}" -type f ! -name '*.*' -perm /111  -print0)
for file in "${tmp[@]}"; do
    head -n1 "$file" | grep -Eqs "$shebangregex" || continue
    filepaths+=("$file")
done

if  find . "${excludes[@]}" -path '*bin/*/*' -type f -perm /111 -print |
    grep .
then
    echo >&2 "::warning:: subdirectories of bin directories are not usable via PATH"
fi

if  find . "${excludes[@]}" -path '*bin/*' -name '*.*' -type f -perm /111 -perm /444 -print |
    grep .
then
    echo >&2 "::warning:: programs in PATH should not have a filename suffix"
fi

[[ -n "${INPUT_SEVERITY}" ]] && options+=(-S "${INPUT_SEVERITY}")

if [[ -n "$INPUT_CHECK_TOGETHER" ]]; then
    echo "::debug:: shellcheck ${options[*]} ${filepaths[*]}"
    shellcheck "${options[@]}" "${filepaths[@]}" || statuscode=$?
else
    echo "::debug:: Shellcheck options: ${options[*]}"
    for file in "${filepaths[@]}"; do
        echo "::debug:: Checking $file"
        shellcheck "${options[@]}" "$file" || statuscode=$?
    done
fi

exit "$statuscode"