export const generateAIResponse = async (prompt: string, systemPrompt = 'You are a helpful assistant.') => {
  const config = useRuntimeConfig()
  const apiKey = config.deepseekApiKey || process.env.DEEPSEEK_API_KEY

  if (!apiKey) {
    throw new Error('DEEPSEEK_API_KEY is not configured')
  }

  try {
    const response = await $fetch('https://api.deepseek.com/v1/chat/completions', {
      method: 'POST',
      headers: {
        'Authorization': `Bearer ${apiKey}`,
        'Content-Type': 'application/json'
      },
      body: {
        model: 'deepseek-chat',
        messages: [
          { role: 'system', content: systemPrompt },
          { role: 'user', content: prompt }
        ],
        stream: false
      }
    }) as any

    return response.choices[0].message.content
  } catch (error: any) {
    console.error('DeepSeek AI error:', error.data || error.message)
    throw new Error(`AI generation failed: ${error.message}`)
  }
}