from langchain_core.messages import SystemMessage, ToolMessage, HumanMessage
from .tools import retrieve_tool 
import base64
from PIL import Image
from io import BytesIO
from fastapi import UploadFile
from huggingface_hub import InferenceClient
from .prompts import story_to_prompt , final_story_prompt
import os
from langgraph.prebuilt import create_react_agent
import pandas as pd
from datasets import load_dataset
from src.genai.utils.models_loader import llm

def generate_final_story(final_state):
    if 'preferred_topics' in final_state:
        if len(final_state['preferred_topics'])>0:
            template = final_story_prompt(final_state)
            messages = [SystemMessage(content=template),
                        HumanMessage(content=f'''The idea of the video is:\n{final_state['idea']}\n '''),
                        ToolMessage(content=f'''The business details is:\n{final_state['business_details']}\nThe data of influencers is:\n{final_state['retrievals'][-1]}''',tool_call_id='final_story_tool')]
            print('The message of final story:',messages)

            react_agent=create_react_agent(
            model=llm,
            tools=[])

            response = react_agent.invoke({'messages':messages})
            response = response['messages'][-1].content
            return response
        
        else:
            return final_state['stories'][-1]
    else:
        template = final_story_prompt(final_state)
        influencers_data = retrieve_tool(final_state)
        messages = [SystemMessage(content=template),
                        ToolMessage(content=f'''The business details is:\n{str(final_state)}\nThe data of influencers is:\n{influencers_data}''',tool_call_id='final_story_tool')]
        react_agent=create_react_agent(
            model=llm,
            tools=[])
        response = react_agent.invoke({'messages':messages})
        response = response['messages'][-1].content
        return response
        


def encode_image_to_base64(uploaded_file: UploadFile) -> str:
    return base64.b64encode(uploaded_file.file.read()).decode("utf-8")
  

# Convert base64 string to PIL image (optional for LangGraph processing)
def process_image(base64_str: str) -> Image.Image:
    image_data = base64.b64decode(base64_str)
    return Image.open(BytesIO(image_data))


def generate_prompt(final_story,business_details,refined_ideation):
    print('************Entering prompt generator****************')
    messages = [SystemMessage(content=story_to_prompt()),
                HumanMessage(content=f'''The scene-by-scene video story is {final_story}'''),
                ToolMessage(content=f'''The business details is:\n{business_details}\nThe idea is{refined_ideation}''',tool_call_id='prompt_generation_id')
                ]

    prompt = llm.invoke(messages)
    print('The prompt is:',prompt)
    return prompt.content

def generate_image(final_story, business_details, refined_ideation):
    prompt = generate_prompt(final_story, business_details, refined_ideation)
    print('************Finished prompt generator****************')

    client = InferenceClient(
        provider="hf-inference",
        api_key=os.environ.get('HUGGINGFACEHUB_ACCESS_TOKEN'),
    )

    print('************Finished calling generator****************')


        # output is a PIL.Image object
    image = client.text_to_image(
        prompt,
        model="black-forest-labs/FLUX.1-schnell",
    )
    print('*****************Image Created*******************')

    # Convert image to BytesIO buffer
    buffered = BytesIO()
    image.save(buffered, format="PNG")  # you can also use "JPEG" if preferred
    buffered.seek(0)

    # Encode to base64 string
    img_base64 = base64.b64encode(buffered.read()).decode("utf-8")
    print('*****************Image Encoded to Base64*******************')

    return img_base64


def save_to_db(business_details):
    dataset = load_dataset("subashdvorak/tiktok-agentic-story")['train']
    # dataset = load_influencer_data()
    df = pd.DataFrame(dataset)

    # 2. Flatten all business detail values to a set of lowercase strings
    all_values = set()
    for v in business_details.values():
        if isinstance(v, str):
            all_values.add(v.lower())
        elif isinstance(v, list):
            all_values.update(map(str.lower, map(str, v)))

    # 3. Match rows where ANY column contains ANY of the values
    def row_matches(row):
        return any(
            str(cell).lower().find(val) != -1
            for cell in row
            for val in all_values
        )

    # 4. Apply row-wise matching
    matched_df = df[df.apply(row_matches, axis=1)]
    matched_df.to_csv('extracted_data.csv')