#!/usr/bin/env bash

################################################################################
################################################################################
########### Super-Linter linting Functions @admiralawkbar ######################
################################################################################
################################################################################
########################## FUNCTION CALLS BELOW ################################
################################################################################
################################################################################
#### Function LintCodebase #####################################################
function LintCodebase() {
  # Call comes through as:
  # LintCodebase "${LANGUAGE}" "${LINTER_NAME}" "${LINTER_COMMAND}" "${FILTER_REGEX_INCLUDE}" "${FILTER_REGEX_EXCLUDE}" "${TEST_CASE_RUN}" "${!LANGUAGE_FILE_ARRAY}"
  ####################
  # Pull in the vars #
  ####################
  FILE_TYPE="${1}" && shift            # Pull the variable and remove from array path  (Example: JSON)
  LINTER_NAME="${1}" && shift          # Pull the variable and remove from array path  (Example: jsonlint)
  LINTER_COMMAND="${1}" && shift       # Pull the variable and remove from array path  (Example: jsonlint -c ConfigFile /path/to/file)
  FILTER_REGEX_INCLUDE="${1}" && shift # Pull the variable and remove from array path  (Example: */src/*,*/test/*)
  FILTER_REGEX_EXCLUDE="${1}" && shift # Pull the variable and remove from array path  (Example: */examples/*,*/test/*.test)
  TEST_CASE_RUN="${1}" && shift        # Flag for if running in test cases
  FILE_ARRAY=("$@")                    # Array of files to validate                    (Example: ${FILE_ARRAY_JSON})

  ##########################
  # Initialize empty Array #
  ##########################
  LIST_FILES=()

  ###################################################
  # Array to track directories where tflint was run #
  ###################################################
  declare -A TFLINT_SEEN_DIRS

  ################
  # Set the flag #
  ################
  SKIP_FLAG=0
  INDEX=0

  ############################################################
  # Check to see if we need to go through array or all files #
  ############################################################
  if [ ${#FILE_ARRAY[@]} -eq 0 ]; then
    SKIP_FLAG=1
    debug " - No files found in changeset to lint for language:[${FILE_TYPE}]"
  else
    # We have files added to array of files to check
    LIST_FILES=("${FILE_ARRAY[@]}") # Copy the array into list
  fi

  debug "SKIP_FLAG: ${SKIP_FLAG}, list of files to lint: ${LIST_FILES[*]}"

  ###############################
  # Check if any data was found #
  ###############################
  if [ ${SKIP_FLAG} -eq 0 ]; then
    WORKSPACE_PATH="${GITHUB_WORKSPACE}"
    if [ "${TEST_CASE_RUN}" == "true" ]; then
      WORKSPACE_PATH="${GITHUB_WORKSPACE}/${TEST_CASE_FOLDER}"
    fi
    debug "Workspace path: ${WORKSPACE_PATH}"

    ################
    # print header #
    ################
    info ""
    info "----------------------------------------------"
    info "----------------------------------------------"

    debug "Running LintCodebase. FILE_TYPE: ${FILE_TYPE}. Linter name: ${LINTER_NAME}, linter command: ${LINTER_COMMAND}, TEST_CASE_RUN: ${TEST_CASE_RUN}, FILTER_REGEX_INCLUDE: ${FILTER_REGEX_INCLUDE}, FILTER_REGEX_EXCLUDE: ${FILTER_REGEX_EXCLUDE} files to lint: ${FILE_ARRAY[*]}"

    if [ "${TEST_CASE_RUN}" = "true" ]; then
      info "Testing Codebase [${FILE_TYPE}] files..."
    else
      info "Linting [${FILE_TYPE}] files..."
    fi

    info "----------------------------------------------"
    info "----------------------------------------------"

    ##################
    # Lint the files #
    ##################
    for FILE in "${LIST_FILES[@]}"; do
      debug "Linting FILE: ${FILE}"
      ###################################
      # Get the file name and directory #
      ###################################
      FILE_NAME=$(basename "${FILE}" 2>&1)
      DIR_NAME=$(dirname "${FILE}" 2>&1)

      ############################
      # Get the file pass status #
      ############################
      # Example: markdown_good_1.md -> good
      FILE_STATUS=$(echo "${FILE_NAME}" | cut -f2 -d'_')
      # Example: clan_format_good_1.md -> good
      SECONDARY_STATUS=$(echo "${FILE_NAME}" | cut -f3 -d'_')

      ####################################
      # Catch edge cases of double names #
      ####################################
      if [ "${SECONDARY_STATUS}" == 'good' ] || [ "${SECONDARY_STATUS}" == 'bad' ]; then
        FILE_STATUS="${SECONDARY_STATUS}"
      fi

      ###################
      # Check if docker #
      ###################
      if [[ ${FILE_TYPE} == *"DOCKER"* ]]; then
        debug "FILE_TYPE for FILE ${FILE} is related to Docker: ${FILE_TYPE}"
        if [[ ${FILE} == *"good"* ]]; then
          debug "Setting FILE_STATUS for FILE ${FILE} to 'good'"
          #############
          # Good file #
          #############
          FILE_STATUS='good'
        elif [[ ${FILE} == *"bad"* ]]; then
          debug "Setting FILE_STATUS for FILE ${FILE} to 'bad'"
          ############
          # Bad file #
          ############
          FILE_STATUS='bad'
        fi
      fi

      #######################################
      # Check if Cargo.toml for Rust Clippy #
      #######################################
      if [[ ${FILE_TYPE} == *"RUST"* ]] && [[ ${LINTER_NAME} == "clippy" ]]; then
        debug "FILE_TYPE for FILE ${FILE} is related to Rust Clippy: ${FILE_TYPE}"
        if [[ ${FILE} == *"good"* ]]; then
          debug "Setting FILE_STATUS for FILE ${FILE} to 'good'"
          #############
          # Good file #
          #############
          FILE_STATUS='good'
        elif [[ ${FILE} == *"bad"* ]]; then
          debug "Setting FILE_STATUS for FILE ${FILE} to 'bad'"
          ############
          # Bad file #
          ############
          FILE_STATUS='bad'
        fi
      fi

      #########################################################
      # If not found, assume it should be linted successfully #
      #########################################################
      if [ -z "${FILE_STATUS}" ] || { [ "${FILE_STATUS}" != "good" ] && [ "${FILE_STATUS}" != "bad" ]; }; then
        debug "FILE_STATUS (${FILE_STATUS}) is empty, or not set to 'good' or 'bad'. Assuming it should be linted correctly. Setting FILE_STATUS to 'good'..."
        FILE_STATUS="good"
      fi

      INDIVIDUAL_TEST_FOLDER="${FILE_TYPE,,}" # Folder for specific tests. By convention, it's the lowercased FILE_TYPE
      TEST_CASE_DIRECTORY="${TEST_CASE_FOLDER}/${INDIVIDUAL_TEST_FOLDER}"
      debug "File: ${FILE}, FILE_NAME: ${FILE_NAME}, DIR_NAME:${DIR_NAME}, FILE_STATUS: ${FILE_STATUS}, INDIVIDUAL_TEST_FOLDER: ${INDIVIDUAL_TEST_FOLDER}, TEST_CASE_DIRECTORY: ${TEST_CASE_DIRECTORY}"

      if [[ ${FILE_TYPE} != "ANSIBLE" ]]; then
        # These linters expect files inside a directory, not a directory. So we add a trailing slash
        TEST_CASE_DIRECTORY="${TEST_CASE_DIRECTORY}/"
        debug "${FILE_TYPE} expects to lint individual files. Updated TEST_CASE_DIRECTORY to: ${TEST_CASE_DIRECTORY}"
      fi

      if [[ ${FILE} != *"${TEST_CASE_DIRECTORY}"* ]] && [ "${TEST_CASE_RUN}" == "true" ]; then
        debug "Skipping ${FILE} because it's not in the test case directory for ${FILE_TYPE}..."
        continue
      fi

      ##################################
      # Increase the linted file index #
      ##################################
      (("INDEX++"))

      ##############
      # File print #
      ##############
      info "---------------------------"
      info "File:[${FILE}]"

      #################################
      # Add the language to the array #
      #################################
      LINTED_LANGUAGES_ARRAY+=("${FILE_TYPE}")

      ####################
      # Set the base Var #
      ####################
      LINT_CMD=''

      #####################
      # Check for ansible #
      #####################
      if [[ ${FILE_TYPE} == "ANSIBLE" ]]; then
        LINT_CMD=$(
          debug "ANSIBLE_ROLES_PATH: ${ANSIBLE_ROLES_PATH}, LINTER_COMMAND:${LINTER_COMMAND}, FILE: ${FILE}"
          cd "${WORKSPACE_PATH}" || exit
          ANSIBLE_ROLES_PATH=${ANSIBLE_ROLES_PATH} ${LINTER_COMMAND} "${FILE}" 2>&1
        )
      ####################################
      # Corner case for pwsh subshell    #
      #  - PowerShell (PSScriptAnalyzer) #
      #  - ARM        (arm-ttk)          #
      ####################################
      elif [[ ${FILE_TYPE} == "POWERSHELL" ]] || [[ ${FILE_TYPE} == "ARM" ]]; then
        ################################
        # Lint the file with the rules #
        ################################
        # Need to run PowerShell commands using pwsh -c, also exit with exit code from inner subshell
        LINT_CMD=$(
          cd "${WORKSPACE_PATH}" || exit
          pwsh -NoProfile -NoLogo -Command "${LINTER_COMMAND} \"${FILE}\"; if (\${Error}.Count) { exit 1 }"
          exit $? 2>&1
        )
      ###############################################################################
      # Corner case for R as we have to pass it to R                                #
      ###############################################################################
      elif [[ ${FILE_TYPE} == "R" ]]; then
        #######################################
        # Lint the file with the updated path #
        #######################################
        if [ ! -f "${DIR_NAME}/.lintr" ]; then
          r_dir="${WORKSPACE_PATH}"
        else
          r_dir="${DIR_NAME}"
        fi
        LINT_CMD=$(
          cd "$r_dir" || exit
          R --slave -e "lints <- lintr::lint('$FILE');print(lints);errors <- purrr::keep(lints, ~ .\$type == 'error');quit(save = 'no', status = if (length(errors) > 0) 1 else 0)" 2>&1
        )
      #########################################################
      # Corner case for C# as it writes to tty and not stdout #
      #########################################################
      elif [[ ${FILE_TYPE} == "CSHARP" ]]; then
        LINT_CMD=$(
          cd "${DIR_NAME}" || exit
          ${LINTER_COMMAND} "${FILE_NAME}" | tee /dev/tty2 2>&1
          exit "${PIPESTATUS[0]}"
        )
      #######################################################
      # Corner case for KTLINT as it cant use the full path #
      #######################################################
      elif [[ ${FILE_TYPE} == "KOTLIN" ]]; then
        LINT_CMD=$(
          cd "${DIR_NAME}" || exit
          ${LINTER_COMMAND} "${FILE_NAME}" 2>&1
        )
      ############################################################################################
      # Corner case for TERRAFORM_TFLINT as it cant use the full path and needs to fetch modules #
      ############################################################################################
      elif [[ ${FILE_TYPE} == "TERRAFORM_TFLINT" ]]; then
        # Check the cache to see if we've already prepped this directory for tflint
        if [[ ! -v "TFLINT_SEEN_DIRS[${DIR_NAME}]" ]]; then
          debug "  Setting up TERRAFORM_TFLINT cache for ${DIR_NAME}"

          TF_DOT_DIR="${DIR_NAME}/.terraform"
          if [ -d "${TF_DOT_DIR}" ]; then
            # Just in case there's something in the .terraform folder, keep a copy of it
            TF_BACKUP_DIR="/tmp/.terraform-tflint-backup${DIR_NAME}"
            debug "  Backing up ${TF_DOT_DIR} to ${TF_BACKUP_DIR}"

            mkdir -p "${TF_BACKUP_DIR}"
            cp -r "${TF_DOT_DIR}" "${TF_BACKUP_DIR}"
            # Store the destination directory so we can restore from our copy later
            TFLINT_SEEN_DIRS[${DIR_NAME}]="${TF_BACKUP_DIR}"
          else
            # Just let the cache know we've seen this before
            TFLINT_SEEN_DIRS[${DIR_NAME}]='false'
          fi

          (
            cd "${DIR_NAME}" || exit
            terraform get >/dev/null
          )
        fi

        LINT_CMD=$(
          cd "${DIR_NAME}" || exit
          ${LINTER_COMMAND} "${FILE_NAME}" 2>&1
        )
      else
        ################################
        # Lint the file with the rules #
        ################################
        LINT_CMD=$(
          cd "${WORKSPACE_PATH}" || exit
          ${LINTER_COMMAND} "${FILE}" 2>&1
        )
      fi
      #######################
      # Load the error code #
      #######################
      ERROR_CODE=$?

      ########################################
      # Check for if it was supposed to pass #
      ########################################
      if [[ ${FILE_STATUS} == "good" ]]; then
        ##############################
        # Check the shell for errors #
        ##############################
        if [ ${ERROR_CODE} -ne 0 ]; then
          debug "Found errors. Error code: ${ERROR_CODE}, File type: ${FILE_TYPE}, Error on missing exec bit: ${ERROR_ON_MISSING_EXEC_BIT}"
          if [[ ${FILE_TYPE} == "BASH_EXEC" ]] && [[ "${ERROR_ON_MISSING_EXEC_BIT}" == "false" ]]; then
            ########
            # WARN #
            ########
            warn "Warnings found in [${LINTER_NAME}] linter!"
            warn "${LINT_CMD}"
          else
            #########
            # Error #
            #########
            error "Found errors in [${LINTER_NAME}] linter!"
            error "Error code: ${ERROR_CODE}. Command output:${NC}\n------\n${LINT_CMD}\n------"
            # Increment the error count
            (("ERRORS_FOUND_${FILE_TYPE}++"))
          fi
        else
          ###########
          # Success #
          ###########
          info " - File:${F[W]}[${FILE_NAME}]${F[B]} was linted with ${F[W]}[${LINTER_NAME}]${F[B]} successfully"
          if [ -n "${LINT_CMD}" ]; then
            info "   - Command output:${NC}\n------\n${LINT_CMD}\n------"
          fi
        fi
      else
        #######################################
        # File status = bad, this should fail #
        #######################################
        ##############################
        # Check the shell for errors #
        ##############################
        if [ ${ERROR_CODE} -eq 0 ]; then
          #########
          # Error #
          #########
          error "Found errors in [${LINTER_NAME}] linter!"
          error "This file should have failed test case!"
          error "Error code: ${ERROR_CODE}. Command output:${NC}\n------\n${LINT_CMD}\n------"
          # Increment the error count
          (("ERRORS_FOUND_${FILE_TYPE}++"))
        else
          ###########
          # Success #
          ###########
          info " - File:${F[W]}[${FILE_NAME}]${F[B]} failed test case (Error code: ${ERROR_CODE}) with ${F[W]}[${LINTER_NAME}]${F[B]} successfully"
        fi
      fi
      debug "Error code: ${ERROR_CODE}. Command output:${NC}\n------\n${LINT_CMD}\n------"
    done
  fi

  # Clean up after TFLINT
  for TF_DIR in "${!TFLINT_SEEN_DIRS[@]}"; do
    (
      cd "${TF_DIR}" || exit
      rm -rf .terraform

      # Check to see if there was a .terraform folder there before we got started, restore it if so
      POTENTIAL_BACKUP_DIR="${TFLINT_SEEN_DIRS[${TF_DIR}]}"
      if [[ "${POTENTIAL_BACKUP_DIR}" != 'false' ]]; then
        # Put the copy back in place
        debug "  Restoring ${TF_DIR}/.terraform from ${POTENTIAL_BACKUP_DIR}"
        mv "${POTENTIAL_BACKUP_DIR}/.terraform" .terraform
      fi
    )
  done

  ##############################
  # Validate we ran some tests #
  ##############################
  if [ "${TEST_CASE_RUN}" = "true" ] && [ "${INDEX}" -eq 0 ]; then
    #################################################
    # We failed to find files and no tests were ran #
    #################################################
    error "Failed to find any tests ran for the Linter:[${LINTER_NAME}]!"
    fatal "Validate logic and that tests exist for linter: ${LINTER_NAME}"
  fi
}