export const PROVIDERS = {
  "fireworks-ai": {
    name: "Fireworks AI",
    max_tokens: 131_000,
    id: "fireworks-ai",
  },
  nebius: {
    name: "Nebius AI Studio",
    max_tokens: 131_000,
    id: "nebius",
  },
  sambanova: {
    name: "SambaNova",
    max_tokens: 8_000,
    id: "sambanova",
  },
  novita: {
    name: "Novita",
    model_id: "HuggingFaceH4/starchat-beta",
    max_tokens: 0,
  },
  custom: {
    name: "自定义模型",
    model_id: process.env.OPENAI_COMPATIBLE_MODEL_ID || "",
    endpoint: process.env.OPENAI_COMPATIBLE_ENDPOINT || "",
    apiKey: process.env.OPENAI_COMPATIBLE_API_KEY || "",
    apiType: "openai", // 默认使用 OpenAI 兼容格式
    max_tokens: parseInt(process.env.OPENAI_COMPATIBLE_MAX_TOKENS) || 0,
    systemPrompt: process.env.OPENAI_COMPATIBLE_SYSTEM_PROMPT || DEFAULT_SYSTEM_PROMPT,
  }
};

// OpenAI兼容的API格式转换
export const convertToOpenAIFormat = (messages) => {
  return {
    model: PROVIDERS.custom.model_id,
    messages,
    stream: true,
    max_tokens: PROVIDERS.custom.max_tokens || undefined,
    temperature: 0.7,
  };
};

// HuggingFace格式转换
export const convertToHFFormat = (messages) => {
  // 将消息数组转换为单个字符串
  const formattedMessages = messages.map(msg => {
    if (msg.role === 'system') {
      return `System: ${msg.content}\n`;
    } else if (msg.role === 'user') {
      return `Human: ${msg.content}\n`;
    } else if (msg.role === 'assistant') {
      return `Assistant: ${msg.content}\n`;
    }
    return '';
  }).join('');

  return {
    model: PROVIDERS.custom.model_id,
    inputs: formattedMessages,
    parameters: {
      max_new_tokens: PROVIDERS.custom.max_tokens || 2048,
      temperature: 0.7,
      top_p: 0.95,
      do_sample: true,
      return_full_text: false,
    },
  };
};

export const updateCustomProvider = (config) => {
  PROVIDERS.custom = {
    ...PROVIDERS.custom,
    ...config,
  };
};

export const DEFAULT_SYSTEM_PROMPT = `你是一个专业的前端开发助手，擅长编写和优化HTML、CSS和JavaScript代码。请根据用户的需求提供相应的代码建议和修改方案。`;