import assert from 'node:assert/strict';
import fs from 'node:fs';
import path from 'node:path';

const root = path.resolve(new URL('..', import.meta.url).pathname);

function read(relativePath) {
  const absolutePath = path.join(root, relativePath);
  assert.ok(fs.existsSync(absolutePath), `missing guarded file: ${relativePath}`);
  return fs.readFileSync(absolutePath, 'utf8');
}

function assertIncludes(source, snippet, label) {
  assert.ok(source.includes(snippet), `${label} must include guarded snippet: ${snippet}`);
}

function assertExcludes(source, snippet, label) {
  assert.ok(!source.includes(snippet), `${label} must not regress to: ${snippet}`);
}

const useTKMindChat = read('src/hooks/useTKMindChat.ts');
assertIncludes(useTKMindChat, 'FINISH_SYNC_RETRY_DELAYS_MS', 'useTKMindChat.ts');
assertIncludes(
  useTKMindChat,
  'mergeConversationSnapshot(localMessages, detail.messages)',
  'useTKMindChat.ts',
);
assertIncludes(useTKMindChat, 'chat-finish-sync.mjs', 'useTKMindChat.ts');
assertExcludes(
  useTKMindChat,
  'messagesRef.current = detail.messages;\n      messageHistoryLoadedCountRef.current = detail.messages.length',
  'useTKMindChat.ts Finish sync',
);

const messageTs = read('src/utils/message.ts');
assertIncludes(messageTs, 'deriveUserFacingText', 'message.ts');
assertIncludes(messageTs, 'deriveAssistantFacingText', 'message.ts');
assertIncludes(messageTs, 'chat-finish-sync.mjs', 'message.ts');

const conversationDisplay = read('conversation-display.mjs');
assertIncludes(conversationDisplay, 'TASK_ROUTING_HINT_RE', 'conversation-display.mjs');
assertIncludes(conversationDisplay, 'deriveUserFacingText', 'conversation-display.mjs');
assertIncludes(conversationDisplay, 'deriveAssistantFacingText', 'conversation-display.mjs');

const chatSkills = read('chat-skills.mjs');
assertIncludes(chatSkills, 'stripKnownChatSkillPrompt', 'chat-skills.mjs');

const server = read('server.mjs');
assertIncludes(server, 'canUseSnapshotCache', 'server.mjs');
assertIncludes(server, 'hintMc != null && hintUa != null', 'server.mjs');

const publicFinishSync = read('mindspace-public-finish-sync.mjs');
assertIncludes(publicFinishSync, 'applyPublicHtmlEdit', 'mindspace-public-finish-sync.mjs');
assertIncludes(publicFinishSync, 'isEditLikeHtmlTool', 'mindspace-public-finish-sync.mjs');

console.log('chat finish sync source guards ok');