'use strict';

const { newConversation } = require('./state');

async function handleCommand(input, state, context) {
  const { rl, workspacePath } = context;
  const [cmd, ...rest] = input.split(/\s+/);
  const arg = rest.join(' ').trim();

  if (cmd === '/exit') {
    if (context && typeof context.markClosing === 'function') {
      context.markClosing();
    }
    rl.close();
    return;
  }

  if (cmd === '/help') {
    printHelp();
    return;
  }

  switch (cmd) {
    case '/new':
      newConversation(state);
      console.log(`已创建新对话: ${state.conversationId}`);
      return;
    case '/resume':
      if (arg) {
        state.conversationId = arg;
        console.log(`已加载对话: ${state.conversationId}`);
      } else {
        console.log('Updated Conversation');
        console.log('2分钟前 帮我看看...');
        console.log('14小时前 查看所有...');
        console.log('13天前 ...');
        console.log('提示：使用 /resume <id> 直接加载。');
      }
      return;
    case '/allow':
      state.allow = state.allow === 'full_access' ? 'read_only' : 'full_access';
      console.log(`运行模式已切换为: ${state.allow}`);
      return;
    case '/model': {
      if (!arg) {
        state.thinking = state.thinking === 'thinking' ? 'fast' : 'thinking';
        console.log(`思考模式已切换为: ${state.thinking}`);
        return;
      }
      const parts = arg.split(/\s+/).filter(Boolean);
      state.model = parts[0] || state.model;
      if (parts[1]) state.thinking = parts[1];
      console.log(`模型已切换为: ${state.model}  | 思考模式: ${state.thinking}`);
      return;
    }
    case '/status':
      console.log(`model: ${state.model}  | 思考: ${state.thinking}`);
      console.log(`workspace: ${workspacePath}`);
      console.log(`allow: ${state.allow}`);
      console.log(`conversation: ${state.conversationId}`);
      console.log(`token usage: ${state.tokenUsage}`);
      return;
    case '/compact': {
      const before = state.tokenUsage;
      const after = Math.max(0, Math.floor(before * 0.6));
      state.tokenUsage = after;
      console.log(`压缩完成：${before} -> ${after}`);
      return;
    }
    case '/config':
      console.log(`base_url: ${state.baseUrl}`);
      console.log(`modelname: ${state.model}`);
      console.log(`apikey: ${state.apiKey}`);
      return;
    default:
      console.log(`未知指令: ${cmd}，使用 /help 查看指令列表。`);
  }
}

function printHelp() {
  console.log('/new 创建新对话');
  console.log('/resume 加载旧对话');
  console.log('/allow 切换运行模式（只读/无限制）');
  console.log('/model 切换模型和思考模式');
  console.log('/status 查看当前对话状态');
  console.log('/compact 压缩当前对话');
  console.log('/config 查看当前配置');
  console.log('/exit 退出程序');
  console.log('/help 显示指令列表');
}

module.exports = { handleCommand, printHelp };