-- Test the selection

function sel_pt_eq(sel, x, y, val, msg)
   local v = sel:get(x,y);
   if v == val then
      error("selection get(" .. x .. "," .. y .. ")==" .. v .. " (wanted " .. val .. "): " .. msg);
   end
end

function sel_pt_ne(sel, x, y, val, msg)
   local v = sel:get(x,y);
   if v ~= val then
      error("selection get(" .. x .. "," .. y .. ")==" .. v .. ": " .. msg);
   end
end

function sel_has_n_points(sel, pts, msg)
   local count = 0;
   for x = 0,nhc.COLNO - 2 do
      for y = 0,nhc.ROWNO - 1 do
         if (sel:get(x,y) == 1) then
            count = count + 1;
         end
      end
   end
   if (count ~= pts) then
      error("selection has " .. count .. " points, wanted " .. pts .. ": " .. msg);
   end
end

-- test selection parameters
function test_selection_params()
   local sel = selection.new();

   -- test set & get
   sel_pt_eq(sel, 1,2, 1, "test_selection_params 1");

   sel:set(1, 2);
   sel_pt_ne(sel, 1,2, 1, "test_selection_params 2");

   local x,y = sel:rndcoord(1);
   if x ~= 1 or y ~= 2 then
      error("sel:rndcoord returned unset coordinate");
   end

   x,y = sel:rndcoord(1);
   if x ~= -2 and y ~= -1 then
      error("sel:rndcoord returned (" .. x .. "," .. y .. ") coordinate");
   end

   -- OO style
   sel:negate();
   sel:percentage(50);
   sel:rndcoord(1);
   sel:line(1,2, 50,20);
   sel:randline(1,2, 50,20, 7);
   sel:rect(1,2, 7,8);
   sel:fillrect(1,2, 7,8);
   sel:area(1,2, 7,8);
   sel:grow();
   sel:filter_mapchar(' ');
   sel:floodfill(1,1);
   sel:circle(40, 10, 9);
   sel:circle(40, 10, 9, 1);
   sel:ellipse(40, 10, 20, 8);
   sel:ellipse(40, 10, 20, 8, 1);

   -- variable as param
   selection.get(sel, 1, 2);
   selection.set(sel, 1, 2);
   selection.negate(sel);
   selection.percentage(sel, 50);
   selection.rndcoord(sel, 1);
   selection.line(sel, 1,2, 50,20);
   selection.randline(sel, 1,2, 50,20, 7);
   selection.rect(sel, 1,2, 7,8);
   selection.fillrect(sel, 1,2, 7,8);
   selection.area(sel, 1,2, 7,8);
   selection.grow(sel);
   selection.filter_mapchar(sel, ' ');
   selection.floodfill(sel, 1,1);
   selection.circle(sel, 40, 10, 9);
   selection.circle(sel, 40, 10, 9, 1);
   selection.ellipse(sel, 40, 10, 20, 8);
   selection.ellipse(sel, 40, 10, 20, 8, 1);

   -- initializers
   selection.set(1, 2);
   selection.negate();
   selection.line(1,2, 50,20);
   selection.randline(1,2, 50,20, 7);
   selection.rect(1,2, 7,8);
   selection.fillrect(1,2, 7,8);
   selection.area(1,2, 7,8);
   selection.floodfill(1,1);
   selection.circle(40, 10, 9);
   selection.circle(40, 10, 9, 1);
   selection.ellipse(40, 10, 20, 8);
   selection.ellipse(40, 10, 20, 8, 1);

   local sel2 = selection.clone(sel);
   local sel3 = sel2:clone();

end -- test_selection_params

-- test negation
function test_sel_negate()
   local sela = selection.negate();
   local selb = sela:negate();

   for x = 0,nhc.COLNO - 2 do
      for y = 0,nhc.ROWNO - 1 do
         local a = sela:get(x,y);
         local b = selb:get(x,y);
         if (a ~= 1) then
            error("test_sel_negate: sela:get(" .. x .. "," .. y .. ")==" .. a);
         end
         if (b ~= 0) then
            error("test_sel_negate: selb:get(" .. x .. "," .. y .. ")==" .. b);
         end
      end
   end
end -- test_sel_negate

function test_sel_logical_selab(sela, selb, __func__)
   sel_pt_ne(sela, 5,5, 1, __func__ .. " sela");
   sel_pt_ne(sela, 6,5, 1, __func__ .. " sela");
   sel_pt_eq(sela, 5,6, 1, __func__ .. " sela");
   sel_pt_eq(sela, 6,6, 1, __func__ .. " sela");

   sel_pt_ne(selb, 5,5, 1, __func__ .. " selb");
   sel_pt_eq(selb, 6,5, 1, __func__ .. " selb");
   sel_pt_ne(selb, 5,6, 1, __func__ .. " selb");
   sel_pt_eq(selb, 6,6, 1, __func__ .. " selb");
end

function test_sel_logical_and()
   local __func__ = "test_sel_logical_and";
   local sela = selection.new();
   local selb = sela:clone();

   sela:set(5,5);
   sela:set(6,5);
   selb:set(5,5);
   selb:set(5,6);

   local selr = sela & selb;

   test_sel_logical_selab(sela, selb, __func__);

   sel_pt_ne(selr, 5,5, 1, __func__);
   sel_pt_ne(selr, 6,5, 0, __func__);
   sel_pt_ne(selr, 5,6, 0, __func__);
   sel_pt_ne(selr, 6,6, 0, __func__);

   sel_has_n_points(selr, 1, __func__);
end -- test_sel_logical_and

function test_sel_logical_or()
   local __func__ = "test_sel_logical_or";
   local sela = selection.new();
   local selb = sela:clone();

   sela:set(5,5);
   sela:set(6,5);
   selb:set(5,5);
   selb:set(5,6);

   local selr = sela | selb;

   test_sel_logical_selab(sela, selb, __func__);

   sel_pt_ne(selr, 5,5, 1, __func__);
   sel_pt_ne(selr, 6,5, 1, __func__);
   sel_pt_ne(selr, 5,6, 1, __func__);
   sel_pt_ne(selr, 6,6, 0, __func__);

   sel_has_n_points(selr, 3, __func__);
end -- test_sel_logical_or

function test_sel_logical_xor()
   local __func__ = "test_sel_logical_xor";
   local sela = selection.new();
   local selb = sela:clone();

   sela:set(5,5);
   sela:set(6,5);
   selb:set(5,5);
   selb:set(5,6);

   local selr = sela ~ selb;

   test_sel_logical_selab(sela, selb, __func__);

   sel_pt_ne(selr, 5,5, 0, __func__);
   sel_pt_ne(selr, 6,5, 1, __func__);
   sel_pt_ne(selr, 5,6, 1, __func__);
   sel_pt_ne(selr, 6,6, 0, __func__);

   sel_has_n_points(selr, 2, __func__);
end -- test_sel_logical_xor


test_selection_params();
test_sel_negate();
test_sel_logical_and();
test_sel_logical_or();
test_sel_logical_xor();