import {test} from 'node:test';
import assert from 'node:assert/strict';
import {createDocument,createRegistry,builtinComponents} from '../../src/lib/canvas-core/index.ts';
import {encodeCopySnapshot,decodeCopySnapshot} from '../../src/lib/canvas-runtime/copy-snapshot.ts';
import {createImportJob,validateImportJob,createImportRunner} from '../../src/lib/canvas-runtime/imports.ts';
const registry=createRegistry(builtinComponents()),node={id:'A',incarnation:2,structure:'node',ownerCanvasId:'P',componentId:'text',dataVersion:1,data:{title:'原始',text:'内容',unknown:{preserved:true}},geometry:{x:0,y:0,width:100,height:100,rotation:0}},document=createDocument('project',[{id:'P',parent:null}],[node],new Map([['deleted',3]]));
const signal=()=>new AbortController().signal;
test('copy snapshot roundtrip preserves the complete source, identity lifecycles and unknown data',async()=>{
 const bytes=await encodeCopySnapshot(document,signal()),decoded=await decodeCopySnapshot(bytes,'project',registry,signal());assert.deepEqual([...decoded.elements],[...document.elements]);assert.deepEqual([...decoded.canvases],[...document.canvases]);assert.deepEqual([...decoded.tombstones],[...document.tombstones]);assert.ok(Object.isFrozen(decoded.elements.get('A').data));await assert.rejects(decodeCopySnapshot(bytes,'different-project',registry,signal()),/invalid_copy_snapshot/);
});
test('snapshot decoding rejects malformed, future, duplicate, invalid and truncated sources without inventing a document',async()=>{
 for(const text of ['','{}','{bad}',JSON.stringify({kind:'header',version:2,projectId:'project'}),JSON.stringify({kind:'header',version:1,projectId:'project'})+'\n'+JSON.stringify({kind:'other',record:{}})])await assert.rejects(decodeCopySnapshot(new Blob([text]),'project',registry,signal()));
 const original=await(await encodeCopySnapshot(document,signal())).text(),row=original.trim().split('\n').at(-1);await assert.rejects(decodeCopySnapshot(new Blob([original+row]),'project',registry,signal()),/invalid_copy_snapshot/);
 const controller=new AbortController();controller.abort();await assert.rejects(encodeCopySnapshot(document,controller.signal),/copy_aborted/);await assert.rejects(decodeCopySnapshot(new Blob([original]),'project',registry,controller.signal),/copy_aborted/);
});
test('preparation checkpoints require a matching interpreter, valid selection, unique allocations and no published progress',()=>{
 const base={...createImportJob({id:'job',projectId:'project',sourceFingerprint:'snapshot',parserVersion:1,source:{kind:'duplicate-snapshot',sha256:'a'.repeat(64),fileId:'file',byteLength:10,targetCanvasId:'P',copy:{sourceRevision:0,roots:[]}}}),status:'preparing',preparation:{version:1,registrySignature:'registry-v1',selection:[{id:'A',incarnation:2}],worldOffset:{x:32,y:32},allocationIds:['new-A'],steps:512}};validateImportJob(base);
 for(const patch of [{preparation:undefined},{preparation:{...base.preparation,version:5}},{preparation:{...base.preparation,allocationIds:['same','same']}},{preparation:{...base.preparation,selection:[]}},{cursor:1},{committedSourceKeys:['element:A']},{status:'running'},{source:{...base.source,snapshotVersion:3}},{source:{...base.source,snapshotVersion:2}}])assert.throws(()=>validateImportJob({...base,...patch}));
 assert.throws(()=>createImportRunner({getJob:()=>base}),/import_interpreter_unavailable/);
});