#!/bin/bash

set -euo pipefail

main() {

    local files_with_whitespace=""
    local files_with_missing_empty_line_at_eof=""

    while IFS= read -r -d '' f; do
        echo "[+] Checking ${f}"

        # Looking for whitespace at end of line
        if grep -Eq " +$" "${f}"; then
            # List of files to ignore
            if \
                [[ "${f}" == "./live/isolinux/boot.msg" ]] \
                ; then
                echo "[+] Checking ${f}: Ignoring whitespace at end of line"
            else
                echo "[+] Checking ${f}: Found whitespace at end of line"
                files_with_whitespace+=" ${f}"
            fi
        fi

        # Looking for missing empty line at end of file
        if [[ -n $(tail -c 1 "${f}") ]]; then
            # List of files to ignore
            if \
                [[ "${f}" == "./tests/kola/ignition/resource/authenticated-gs/data/expected/"* ]] ||\
                [[ "${f}" == "./tests/kola/ignition/resource/authenticated-s3/data/expected/"* ]] ||\
                [[ "${f}" == "./tests/kola/ignition/resource/remote/data/expected/"* ]] \
                ; then
                echo "[+] Checking ${f}: Ignoring missing empty line at end of file"
            else
                echo "[+] Checking ${f}: Missing empty line at end of file"
                files_with_missing_empty_line_at_eof+=" ${f}"
            fi
        fi
    done< <(find . -path "./.git" -prune -o -type f -print0)

    echo ""
    if [[ -n "${files_with_whitespace}" ]]; then
        echo "[+] Found files with whitespace at the end of line"
        echo "${files_with_whitespace}" | tr ' ' '\n'
    else
        echo "[+] No files with whitespace at the end of line"
    fi

    echo ""
    if [[ -n "${files_with_missing_empty_line_at_eof}" ]]; then
        echo "[+] Found files with missing empty line at end of file"
        echo "${files_with_missing_empty_line_at_eof}" | tr ' ' '\n'
    else
        echo "[+] No files with missing empty line at end of file"
    fi

    if [[ -n "${files_with_whitespace}" ]] || [[ -n "${files_with_missing_empty_line_at_eof}" ]]; then
        exit 1
    fi

    exit 0
}

main "${@}"