'use strict';

const { startSpinner, stopSpinner } = require('./ui/spinner');
const { truncateText, sleep, streamText } = require('./ui/stream');
const { GREY, RESET } = require('./env');

function createAssistantSimulator(state, options) {
  const showReasoning = options.showReasoning;
  return async function simulateAssistantReply(userInput) {
    const spinner = startSpinner('');

    await sleep(600);
    spinner.setLabel(' 思考中...');
    await sleep(1200);

    stopSpinner(spinner, showReasoning ? '○ 思考完成' : '○');

    if (showReasoning) {
      const reasoning = `好的，用户让我根据输入「${userInput}」做出回应，并给出明确的下一步。`;
      const snippet = truncateText(reasoning, 50);
      await streamText('', `${GREY}${snippet}${RESET}`, 12);
    }

    const reply = '这是模拟的 Eagent 回复内容。后续会替换为真实模型流式输出。';
    await streamText('Eagent：', reply, 18);
    state.tokenUsage += userInput.length + reply.length;
  };
}

module.exports = { createAssistantSimulator };