#!/usr/bin/env bash

DIST_DIR="${BASE_DIR}/dist"
PROJECT_DIR="${BASE_DIR}/project"

function info {
  echo "[INFO] ${1}"
}

function debug {
  echo "[DEBUG] ${1}"
}

function error {
  echo "[ERROR] ${1}"
}

function get_project_opt {
  filter=${1}
  manifest_path=${PROJECT_DIR}/bricklayer.json
  cat ${manifest_path} | jq -r ${filter}
}

function get_build_dir {
  project_name="${1}"
  temp_dir=$(mktemp -d)
  build_dir="${temp_dir}/${project_name}"
  mkdir -p "${build_dir}"
  echo ${build_dir}
}

function exec_hook {

  hook_name=${1}
  build_dir=${2}

  hook_script="${PROJECT_DIR}/$(get_project_opt .hooks.${hook_name})"

  # Test hook script existence
  if [ ! -f "${hook_script}" ]; then
    info "No ${hook_name} hook."
    exit
  fi

  info "Executing ${hook_name} hook..."

  # Ensure the hook script is executable
  chmod +x "${hook_script}"

  # Execute hook in a subshell
  ( BUILD_DIR="${build_dir}" PROJECT_DIR="${PROJECT_DIR}" exec "${hook_script}" )

  # If the script did not execute properly, we stop here
  if [ $? != 0 ]; then
    error "The '${hook_name}' hook script did not finished properly !"
    exit 1
  fi

}

function create_control_file {

  build_dir="${1}"
  mkdir -p "${build_dir}/DEBIAN"

  control_file="${build_dir}/DEBIAN/control"
  touch "${control_file}"

  echo "Package: $(get_project_opt .name)" > "${control_file}"
  echo "Version: $(get_project_opt .version)" >> "${control_file}"
  echo "Section: $(get_project_opt .section)" >> "${control_file}"
  echo "Priority: $(get_project_opt .priority)" >> "${control_file}"
  echo "Architecture: $(get_project_opt .arch)" >> "${control_file}"

  echo "Depends: " >> "${control_file}"
  echo "Maintainer: $(get_project_opt .maintainer)" >> "${control_file}"
  echo "Description: $(get_project_opt .description)" >> "${control_file}"

}

function build_project {

  project_name="$(get_project_opt '.name')"

  info "Building project '${project_name}'..."

  build_dir="$(get_build_dir "${project_name}")"

  debug "Build dir: ${build_dir}"

  create_control_file "${build_dir}"

  exec_hook "preBuild" "${build_dir}"

  cd "${build_dir}/.."
  dpkg-deb --build "${project_name}"

  if [ $? != 0 ]; then
    error "The build process has not completed successfuly !"
    exit 1
  fi

  cd -

  exec_hook "postBuild" "${build_dir}"

  mkdir -p "${DIST_DIR}"
  cp "${build_dir}/../${project_name}.deb" "${DIST_DIR}/${project_name}.deb"

  info "Done"

}

function main {

  manifest_path=${PROJECT_DIR}/bricklayer.json

  if [ ! -f "${manifest_path}" ]; then
    error "There is no 'bricklayer.json' file found in the project directory !"
    exit 1
  fi

  build_project

}

main