from langchain_openai import ChatOpenAI
from langchain.prompts import PromptTemplate
from langchain.chains import LLMChain
from langchain_community.tools import DuckDuckGoSearchRun

def generate_script(prompt,video_length,creativity,api_key):
    
    title_template = PromptTemplate(
        input_variables = ['subject'], 
        template='Please come up with a title for a YouTube video on the  {subject}.'
        )

    
    script_template = PromptTemplate(
        input_variables = ['title', 'DuckDuckGo_Search','duration'], 
        template='Create a script for a YouTube video based on this title for me. TITLE: {title} of duration: {duration} minutes using this search data {DuckDuckGo_Search} '
    )

    
    llm = ChatOpenAI(temperature=creativity,openai_api_key=api_key,
            model_name='gpt-3.5-turbo-0125') 
    
    
    title_chain = LLMChain(llm=llm, prompt=title_template, verbose=True)
    script_chain = LLMChain(llm=llm, prompt=script_template, verbose=True)

    
    search = DuckDuckGoSearchRun()

    title = title_chain.invoke(prompt)

    
    search_result = search.run(prompt) 
    script = script_chain.run(title=title, DuckDuckGo_Search=search_result,duration=video_length)

    return search_result,title,script