#!/usr/bin/env bash
set -euo pipefail
IFS=$'\n\t'

# Usage: ./tag.sh [TAG_NAME]
# Par défaut, TAG_NAME="dev-test"

TAG_NAME="${1:-dev-test}"
ROOT_DIR="/home/desk/code/4NK_dev"

print_info() { echo "[tag] $*"; }
print_warn() { echo "[tag][warn] $*"; }

delete_tag_if_exists() {
  local tag="$1"
  if git show-ref --tags --quiet --verify "refs/tags/${tag}"; then
    git tag -d "${tag}" >/dev/null || true
    git push origin ":refs/tags/${tag}" >/dev/null || true
  fi
}

ensure_branch_checked_out() {
  local branch="$1"
  if git rev-parse --verify "origin/${branch}" >/dev/null 2>&1; then
    git checkout "${branch}" >/dev/null 2>&1 || git checkout -b "${branch}" "origin/${branch}" >/dev/null 2>&1 || true
    git pull --ff-only >/dev/null 2>&1 || true
  else
    print_info "branche ${branch} introuvable, utilisation de la branche courante"
  fi
}

tag_current_repo() {
  local tag="$1"
  local ref_sha
  ref_sha=$(git rev-parse --verify HEAD)
  delete_tag_if_exists "${tag}"
  git tag -a "${tag}" -m "CI ${tag} trigger" "${ref_sha}"
  git push origin "refs/tags/${tag}"
}

get_submodule_names() {
  git config -f .gitmodules --name-only --get-regexp 'submodule\..*\.path' | sed -E 's/\.path$//'
}

tag_root_repo() {
  cd "${ROOT_DIR}"
  print_info "repository racine: $(basename "${ROOT_DIR}") -> ${TAG_NAME}"
  local dev_head
  dev_head=$(git rev-parse --verify refs/heads/dev)
  delete_tag_if_exists "${TAG_NAME}"
  git tag -a "${TAG_NAME}" -m "CI ${TAG_NAME} trigger" "${dev_head}"
  git push origin "refs/tags/${TAG_NAME}"
}

tag_submodules() {
  print_info "lecture des submodules depuis .gitmodules"
  local names
  mapfile -t names < <(get_submodule_names)
  for name in "${names[@]}"; do
    local sm_path sm_url sm_branch
    sm_path=$(git config -f .gitmodules --get "${name}.path" || true)
    sm_url=$(git config -f .gitmodules --get "${name}.url" || true)
    sm_branch=$(git config -f .gitmodules --get "${name}.branch" || echo dev)

    if [ -z "${sm_path}" ] || [ -z "${sm_url}" ]; then
      print_warn "entrée incomplète: ${name}, ignorée"
      continue
    fi
    if [ ! -d "${sm_path}" ]; then
      print_warn "dossier manquant: ${sm_path}, on saute"
      continue
    fi

    print_info "${sm_path} (${sm_url}) -> ${TAG_NAME} sur branche ${sm_branch}"
    (
      cd "${sm_path}"
      git fetch --all --prune >/dev/null 2>&1 || true
      ensure_branch_checked_out "${sm_branch}"
      tag_current_repo "${TAG_NAME}"
    ) || print_warn "échec sur ${sm_path}, on continue"
  done
}

main() {
  cd "${ROOT_DIR}"
  tag_root_repo
  tag_submodules
  print_info "terminé: ${TAG_NAME} posé sur le repo racine et submodules accessibles"
}

main "$@"