from fastapi import FastAPI, HTTPException
from pydantic import BaseModel
from fastapi.responses import FileResponse
import gradio as gr
from entity_recognition import extract_entities
from wordcloud import WordCloud
from summarization import summarizer
from utils import list_files, process_file

# Initialize FastAPI
app = FastAPI()

# Request Model
class TextRequest(BaseModel):
    text: str

@app.post("/summarize")
def summarize_text(request: TextRequest):
    chunks = [request.text[i:i+500] for i in range(0, len(request.text), 500)]
    summaries = []
    for chunk in chunks:
        try:
            summary = summarizer(
                chunk, 
                max_length=130, 
                min_length=30, 
                do_sample=False,
                truncation=True
            )
            summaries.append(summary[0]['summary_text'])
        except Exception as e:
            raise HTTPException(status_code=500, detail=f"Summarization error: {str(e)}")
    return {"summary": " ".join(summaries)}

@app.post("/entities")
def extract_entities_endpoint(request: TextRequest):
    return {"entities": extract_entities(request.text)}

@app.post("/wordcloud")
def generate_word_cloud(request: TextRequest):
    wordcloud = WordCloud(
        width=1200, 
        height=1200,
        max_font_size=120, 
        min_font_size=20, 
        background_color="white",
        colormap="viridis"
    ).generate(request.text)
    img_path = "wordcloud.png"
    wordcloud.to_file(img_path)
    return FileResponse(img_path, media_type="image/png", filename="wordcloud.png")

# Gradio UI
with gr.Blocks(theme=gr.themes.Soft(), css="""

""") as iface:
    
    gr.Markdown("# JFK Document Analysis Suite")
    gr.Markdown("Analyze declassified documents with AI-powered tools")

    # File selection
    with gr.Row():
        file_dropdown = gr.Dropdown(
            choices=list_files(), 
            label="Select Document",
            interactive=True
        )
        process_btn = gr.Button("Process Document", variant="primary")

    # Document display
    with gr.Row():
        full_doc_text = gr.Textbox(
            label="Full Document Text",
            lines=15,
            max_lines=25
        )
        output_summary = gr.Textbox(
            label="AI Summary",
            lines=15,
            max_lines=25
        )

    # Analysis results
    with gr.Row():
        output_entities = gr.JSON(
            label="Extracted Entities",
            show_label=True
        )
        output_wordcloud = gr.Image(
            label="Word Cloud",
            height=600,
            width=600
        )



    # Event handlers must be inside the Blocks context
    process_btn.click(
        fn=process_file,
        inputs=file_dropdown,
        outputs=[full_doc_text, output_summary, output_entities, output_wordcloud]
    )


if __name__ == "__main__":
    iface.launch(
        server_name="0.0.0.0",
        server_port=7860,
        share=False,
        debug=True
    )