today_ai_weather/app/services/ai_service.rb

class AiService
  def initialize
    @client = OpenAI::Client.new(
      access_token: Rails.application.credentials.openai.token,
      uri_base: Rails.application.credentials.openai.uri,
      request_timeout: 240
    )
  end

  def generate_prompt(city, weather_data)
    response = @client.chat(
      parameters: {
        model: "gpt-4",
        messages: [ {
                     role: "system",
                     content: "You are a professional artist creating prompts for DALL-E 3. Create realistic, artistic weather scenes featuring iconic landmarks."
                   }, {
                     role: "user",
                     content: generate_prompt_request(city, weather_data)
                   } ],
        temperature: 0.7,
        max_tokens: 300
      }
    )

    response.dig("choices", 0, "message", "content")
  end

  def generate_image(prompt)
    response = @client.images.generate(
      parameters: {
        model: "dall-e-3",
        prompt: prompt,
        size: "1792x1024",
        quality: "standard",
        n: 1
      }
    )

    response.dig("data", 0, "url")
  end

  private

  def generate_prompt_request(city, weather_data)
    <<~PROMPT
      Create a DALL-E 3 prompt for a weather scene in #{city.name}, #{city.country.name}.

      Weather conditions:
      - Temperature: #{weather_data[:temperature]}°C
      - Weather: #{weather_data[:description]}
      - Cloud cover: #{weather_data[:cloud]}%
      - Time: Early morning

      Requirements:
      - Feature iconic landmarks or architecture from #{city.name}
      - Realistic style
      - Weather conditions should be clearly visible
      - Atmospheric and artistic composition

      Generate a detailed, creative prompt that will produce a beautiful and realistic image.
    PROMPT
  end
end