% \iffalse meta-comment
% dtx/mahjong-tiles-07-public.dtx -- public commands for mahjong-tiles
%
% Copyright (c) 2021 Daniel Schmitz
% Copyright (c) 2026 Lilia Chen May Wither
%
% This file is distributed under the MIT Licence; see LICENCE.
% \fi
%
% \subsection{Public commands}
%
%    \begin{macrocode}
%<*package>
% -----------------------------------------------------------------------------
% Public commands
% -----------------------------------------------------------------------------
\cs_new_protected:Npn \__mahjongtiles_set_local_defaults:
  {
    \dim_set_eq:NN \l__mahjongtiles_tile_height_dim \g__mahjongtiles_default_height_dim
    \fp_set_eq:NN  \l__mahjongtiles_tile_scale_fp  \g__mahjongtiles_default_scale_fp
    \tl_set_eq:NN  \l__mahjongtiles_overlay_style_tl \g__mahjongtiles_overlay_style_tl
    \int_set_eq:NN \l__mahjongtiles_river_cols_int \g__mahjongtiles_river_cols_int
    \dim_set_eq:NN \l__mahjongtiles_river_row_gap_dim \g__mahjongtiles_river_row_gap_dim
  }

\cs_new_protected:Npn \__mahjongtiles_apply_local_options:nnnn #1#2#3#4
  {
    \__mahjongtiles_set_local_defaults:
    \tl_if_in:nnTF {#1} { = }
      { \keys_set:nn { mahjong-tiles / local } {#1} }
      {
        \str_if_eq:nnTF {#1} { no-aka }
          { \keys_set:nn { mahjong-tiles / local } {#1} }
          {
            \dim_set:Nn \l__mahjongtiles_tile_height_dim {#1}
            \fp_set:Nn  \l__mahjongtiles_tile_scale_fp  {#2}
            \IfNoValueF {#3}
              { \__mahjongtiles_set_back_color_local:n {#3} }
          }
      }
    \tl_if_blank:nF {#4}
      { \keys_set:nn { mahjong-tiles / local } {#4} }
  }

\cs_new_protected:Npn \__mahjongtiles_ensure_local_defaults:
  {
    \dim_compare:nNnT { \l__mahjongtiles_tile_height_dim } = { 0pt }
      { \__mahjongtiles_set_local_defaults: }
  }

\cs_new_protected:Npn \__mahjongtiles_mj:n #1
  {
    \int_compare:nNnTF { \l__mahjongtiles_mj_depth_int } > {0}
      { \msg_error:nnn { mahjong-tiles } { nested-mj } {#1} }
      {
        \group_begin:
          \__mahjongtiles_ensure_local_defaults:
          \int_incr:N \l__mahjongtiles_mj_depth_int
          \__mahjongtiles_render_hand:n {#1}
        \group_end:
      }
  }

\cs_new_protected:Npn \mahjongtiles_typeset_hand:n #1
  {
    \group_begin:
      \__mahjongtiles_set_local_defaults:
      \__mahjongtiles_render_hand:n {#1}
    \group_end:
  }

\cs_new_protected:Npn \mahjongtiles:n #1
  { \mahjongtiles_typeset_hand:n {#1} }

\cs_new_protected:Npn \mahjongtiles_typeset_river:n #1
  {
    \group_begin:
      \__mahjongtiles_set_local_defaults:
      \__mahjongtiles_render_river:n {#1}
    \group_end:
  }

\cs_new_protected:Npn \mahjongtilesriver:n #1
  { \mahjongtiles_typeset_river:n {#1} }

\NewDocumentCommand \mj { m }
  { \__mahjongtiles_mj:n {#1} }

\NewDocumentCommand \mahjong { O{\g__mahjongtiles_default_height_dim} O{\g__mahjongtiles_default_scale_fp} o O{} m }
  {
    \group_begin:
      \__mahjongtiles_apply_local_options:nnnn {#1} {#2} {#3} {#4}
      \__mahjongtiles_render_hand:n {#5}
    \group_end:
  }

\NewDocumentCommand \mahjongriver { O{\g__mahjongtiles_default_height_dim} O{\g__mahjongtiles_default_scale_fp} o O{} m }
  {
    \group_begin:
      \__mahjongtiles_apply_local_options:nnnn {#1} {#2} {#3} {#4}
      \__mahjongtiles_render_river:n {#5}
    \group_end:
  }

\NewDocumentCommand \stick { O{} m }
  { \__mahjongtiles_stick:nn {#1} {#2} }

\NewDocumentCommand \mahjongtilessetup { m }
  {
    \keys_set:nn { mahjong-tiles } {#1}
  }

\ExplSyntaxOff
%<package>\endinput
%</package>
%    \end{macrocode}
\endinput