% Copyright 2026 Open-Guji (https://github.com/open-guji)
%
% Licensed under the Apache License, Version 2.0 (the "License");
% you may not use this file except in compliance with the License.
% You may obtain a copy of the License at
%
%     http://www.apache.org/licenses/LICENSE-2.0
%
% Unless required by applicable law or agreed to in writing, software
% distributed under the License is distributed on an "AS IS" BASIS,
% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
% See the License for the specific language governing permissions and
% limitations under the License.
% luatex-cn-core-template.sty
% Shared helpers for template searching and loading
%

\RequirePackage{expl3}

\ProvidesExplPackage {core/luatex-cn-core-template} {2026/02/18} {0.3.0} {Template loading helpers}

% Check if a template exists (Local first, then configs/ directory)
% #1 = template name
% #2 = system config prefix (e.g. luatex-cn-vbook-)
\cs_new_protected:Npn \luatexcn_if_template_exist:nnTF #1 #2 #3 #4
  {
    \file_if_exist:nTF { #1 .cfg }
      { #3 }
      {
        \file_if_exist:nTF { configs/#2#1.cfg }
          { #3 }
          { #4 }
      }
  }

% Load a template (Local first, then configs/ directory)
% #1 = template name
% #2 = system config prefix
\cs_new_protected:Npn \luatexcn_load_template:nn #1 #2
  {
    \file_if_exist:nTF { #1 .cfg }
      { \file_input:n { #1 .cfg } }
      {
        \InputIfFileExists { configs/#2#1.cfg } { }
          { \PackageWarning{luatex-cn-core}{Template~#1~not~found} }
      }
  }

\cs_generate_variant:Nn \luatexcn_if_template_exist:nnTF { Vn, nV, VV }
\cs_generate_variant:Nn \luatexcn_load_template:nn { Vn, nV, VV }

% CJK Alias
\cs_new_eq:NN \加载模板 \luatexcn_load_template:nn

\endinput