const test = require('node:test');
const assert = require('node:assert/strict');
const {reorder,duplicate,filterBlocks,historyState,clampNumber,shouldAcceptPreview}=require('../app/static/editor-helpers.js');
test('move item up and down without mutating input',()=>{
 const source=[{id:'a'},{id:'b'},{id:'c'}];
 assert.deepEqual(reorder(source,0,2).map(x=>x.id),['b','c','a']);
 assert.deepEqual(reorder(source,2,0).map(x=>x.id),['c','a','b']);
 assert.deepEqual(source.map(x=>x.id),['a','b','c']);
 assert.equal(reorder(source,-1,1),null);
 assert.equal(reorder(source,1,5),null);
 assert.equal(reorder(source,1,1).length,3);
});
test('clone nested layout and recursively regenerate every component ID',()=>{
 const nested={id:'original',type:'layout',columns:[{blocks:[{id:'nested',type:'richtext'}]},{blocks:[]}]};
 let n=0;
 const clone=duplicate(nested,()=>`copy-${++n}`);
 assert.equal(clone.id,'copy-1');assert.equal(clone.columns[0].blocks[0].id,'copy-2');
 clone.columns[0].blocks[0].type='hero';
 assert.equal(nested.columns[0].blocks[0].type,'richtext');
});
test('find by title, type, translated name, nested layout child',()=>{
 const list=[{type:'hero',title:'Global Trade'},{type:'layout',columns:[{blocks:[{type:'richtext',title:'移动端布局'}]}]},{type:'cta'}];
 const spec={hero:{name:'横幅'},layout:{name:'多列'},cta:{name:'行动号召'}};
 assert.deepEqual(filterBlocks(list,'gLoBaL',spec).map(x=>x.index),[0]);
 assert.deepEqual(filterBlocks(list,'移动端',spec).map(x=>x.index),[1]);
 assert.deepEqual(filterBlocks(list,'行动号召',spec).map(x=>x.index),[2]);
 assert.equal(filterBlocks(list,'',spec).length,3);
 assert.equal(filterBlocks(list,'不存在',spec).length,0);
});
test('undo redo disabled at correct boundaries',()=>{
 assert.deepEqual(historyState(['s1'],0),{canUndo:false,canRedo:false});
 assert.deepEqual(historyState(['s1','s2'],0),{canUndo:false,canRedo:true});
 assert.deepEqual(historyState(['s1','s2'],1),{canUndo:true,canRedo:false});
});
test('preview accepts only latest request from current page',()=>{
 assert.equal(shouldAcceptPreview('about',12,'about',12),true);
 assert.equal(shouldAcceptPreview('about',11,'about',12),false);
 assert.equal(shouldAcceptPreview('about',12,'home',12),false);
});
test('numeric style input is clamped',()=>{
 assert.equal(clampNumber(180,0,120,10),120);
 assert.equal(clampNumber(-5,0,120,10),0);
 assert.equal(clampNumber('not-number',0,120,10),10);
});