import os
import time
from typing import List, Tuple, Optional
import google.generativeai as genai
import gradio as gr
from PIL import Image

# Environment variable for Google API Key
GOOGLE_API_KEY = os.environ.get("GOOGLE_API_KEY")

# Constants for image processing
IMAGE_WIDTH = 512

# Helper functions
def preprocess_stop_sequences(stop_sequences: str) -> Optional[List[str]]:
    return [seq.strip() for seq in stop_sequences.split(",")] if stop_sequences else None

def preprocess_image(image: Image.Image) -> Image.Image:
    image_height = int(image.height * IMAGE_WIDTH / image.width)
    return image.resize((IMAGE_WIDTH, image_height))

# Function to trigger model invocation
def bot(
    google_key: str,
    image_prompt: Optional[Image.Image],
    chatbot: List[Tuple[str, str]]
):
    google_key = google_key or GOOGLE_API_KEY
    if not google_key:
        raise ValueError("GOOGLE_API_KEY is not set. Please set it up.")
    
    # Fixed text prompt for analyzing gender-based discrimination
    text_prompt = "Analyze this for any instances of gender-based discrimination. Consider both explicit and implicit biases, stereotypes, and unequal treatment. Provide specific examples from the text to support your analysis."

    genai.configure(api_key=google_key)
    generation_config = genai.types.GenerationConfig(
        temperature=0.4,
        max_output_tokens=1024,
        stop_sequences=preprocess_stop_sequences("STOP, END"),
        top_k=32,
        top_p=1.0,
    )

    model_name = "gemini-1.5-pro-latest" 
    model = genai.GenerativeModel(model_name)
    inputs = [text_prompt, preprocess_image(image_prompt)] if image_prompt else [text_prompt]
    
    response = model.generate_content(inputs, stream=True, generation_config=generation_config)
    response.resolve()

    chatbot[-1][1] = ""
    for chunk in response:
        chatbot[-1][1] += chunk.text
        time.sleep(0.01)
    return chatbot

# Gradio Interface Components
google_key_component = gr.Textbox(label="GOOGLE API KEY", type="password", placeholder="...", visible=GOOGLE_API_KEY is None)
image_prompt_component = gr.Image(type="pil")
chatbot_component = gr.Chatbot(label='Gemini', bubble_full_width=False)
run_button_component = gr.Button("Check Discrimination")

# Layout and Interaction
with gr.Blocks() as demo:
    with gr.Column():
        google_key_component.render()
        image_prompt_component.render()
        run_button_component.render()
        chatbot_component.render()

    # Connect button to the bot function
    run_button_component.click(
        fn=bot,
        inputs=[google_key_component, image_prompt_component, chatbot_component],
        outputs=[chatbot_component]
    )

# Launch the app
demo.launch()