#!/bin/bash
# SPDX-Version: 3.0
# SPDX-CreationInfo: 2025-06-17; WEIDNER, Marc S.; <msw@coresecret.dev>
# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.installer.git
# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
# SPDX-FileCopyrightText: 2024-2025; WEIDNER, Marc S.; <msw@coresecret.dev>
# SPDX-FileType: SOURCE
# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
# SPDX-PackageName: CISS.debian.installer
# SPDX-Security-Contact: security@coresecret.eu

guard_sourcing

#######################################
# Reading and extracting variables from "${PRESEED}".
# Globals:
#   HMP_RECIPE_DEV_PARTITIONS
#   VAR_ARCHITECTURE
#   VAR_NUKE
#   VAR_PRESEED
#   VAR_RECIPE_FIRMWARE
#   VAR_RECIPE_HIGHEST_DEVICE
#   VAR_RECIPE_STRING
#   VAR_RECIPE_TABLE
#   architecture
# Arguments:
#   None
# Returns:
#   0: on success
#   ERR_NO_VALID_RECIPE
#######################################
yaml_reader() {
  ### Declare Arrays, HashMaps, and Variables.
  declare -Ag HMP_RECIPE_DEV_PARTITIONS=()
  declare -gx VAR_RECIPE_STRING="" VAR_RECIPE_HIGHEST_DEVICE="" VAR_ARCHITECTURE="" VAR_RECIPE_FIRMWARE="" VAR_NUKE="" \
              VAR_RECIPE_TABLE=""

  ### Declare and substitute input files.
  declare -r  var_if="${VAR_PRESEED}"
  ### Search pattern for variables (recipe_<string>_active='true')
  declare -r  var_search_pattern="^recipe_.*_active='true'"
  declare     var_line="" var_middle_part="" var_highest_dev="" var_device="" var_fields="" var_partition="" \
              recipe_firmware_var="" recipe_nuke_var="" recipe_table_var=""

  ### Read "${var_if}" line by line
  while IFS= read -r var_line; do
    ### Check, if line matches the search pattern
    if [[ "${var_line}" =~ ^recipe_([^_]+)_active=\'true\' ]]; then
      var_middle_part="${BASH_REMATCH[1]}"
      VAR_RECIPE_STRING="${var_middle_part}"
      break
    fi
    #if [[ "${var_line}" =~ ${var_search_pattern} ]]; then
    #  ### Extract the middle part or second position
    #  var_middle_part=$(echo "${var_line}" | sed -E "s/^recipe_([^_]+)_active='true'/\1/")
    #  VAR_RECIPE_STRING="${var_middle_part}"
    #  ### Exit after first occurrence
    #  break
    #fi
  done < "${var_if}"

  if [[ -n "${VAR_RECIPE_STRING}" ]]; then
    do_log "info" "file_only" "1251() Found active recipe string: '${VAR_RECIPE_STRING}'."
  else
    do_log "fatal" "file_only" "1251() Found NO active recipe string: '${VAR_RECIPE_STRING}'."
    exit "${ERR_NO_VALID_RECIPE}"
  fi

  ### Extract architecture.
  VAR_ARCHITECTURE="${architecture}"

  ### Extract chosen firmware.
  recipe_firmware_var="recipe_${VAR_RECIPE_STRING}_control_firmware"
  VAR_RECIPE_FIRMWARE="${!recipe_firmware_var}"

  ### Extract the chosen Nuke mechanism.
  recipe_nuke_var="recipe_${VAR_RECIPE_STRING}_control_nuke"
  VAR_NUKE="${!recipe_nuke_var}"

  ### Extract chosen partition table.
  recipe_table_var="recipe_${VAR_RECIPE_STRING}_control_table"
  VAR_RECIPE_TABLE="${!recipe_table_var}"

  if [[ "${VAR_RECIPE_TABLE,,}" == "gpt" && "${VAR_RECIPE_FIRMWARE,,}" == "uefi" ]]; then

    do_log "info" "file_only" "1251() Partition table: '${VAR_RECIPE_TABLE}' and firmware: '${VAR_RECIPE_FIRMWARE}' > ESP 'EF00' necessary."

  elif [[ "${VAR_RECIPE_TABLE,,}" == "gpt" && "${VAR_RECIPE_FIRMWARE,,}" == "bios" ]]; then

    do_log "info" "file_only" "1251() Partition table: '${VAR_RECIPE_TABLE}' and firmware: '${VAR_RECIPE_FIRMWARE}' > BIOS Boot Partition 'EF02' necessary."

  elif [[ "${VAR_RECIPE_TABLE,,}" == "msdos" && "${VAR_RECIPE_FIRMWARE,,}" == "uefi" ]]; then

    do_log "info" "file_only" "1251() Partition table: '${VAR_RECIPE_TABLE}' and firmware: '${VAR_RECIPE_FIRMWARE}' > ESP on MBR needs partition type '0xEF'."

  elif [[ "${VAR_RECIPE_TABLE,,}" == "msdos" && "${VAR_RECIPE_FIRMWARE,,}" == "bios" ]]; then

    do_log "info" "file_only" "1251() Partition table: '${VAR_RECIPE_TABLE}' and firmware: '${VAR_RECIPE_FIRMWARE}' > No special firmware partition necessary."

  fi

  return 0
}
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