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import base64
import os
import mimetypes
import tempfile
import time
from google import genai
from google.genai import types
import gradio as gr

def generate_image(api_key, prompt, file_name):
    # Validate inputs
    if not api_key:
        return None, "Please enter your Gemini API key"
    
    if not prompt:
        return None, "Please enter a prompt for image generation"
    
    if not file_name:
        file_name = f"gemini_image_{int(time.time())}"
    
    try:
        # Set up the client
        client = genai.Client(api_key=api_key)
        model = "gemini-2.0-flash-exp-image-generation"
        
        # Create content
        contents = [
            types.Content(
                role="user",
                parts=[types.Part.from_text(text=prompt)],
            ),
        ]
        
        # Configure generation settings
        generate_content_config = types.GenerateContentConfig(
            response_modalities=["image", "text"],
            safety_settings=[
                types.SafetySetting(category="HARM_CATEGORY_HARASSMENT", threshold="BLOCK_NONE"),
                types.SafetySetting(category="HARM_CATEGORY_HATE_SPEECH", threshold="BLOCK_NONE"),
                types.SafetySetting(category="HARM_CATEGORY_SEXUALLY_EXPLICIT", threshold="BLOCK_NONE"),
                types.SafetySetting(category="HARM_CATEGORY_DANGEROUS_CONTENT", threshold="BLOCK_NONE"),
                types.SafetySetting(category="HARM_CATEGORY_CIVIC_INTEGRITY", threshold="BLOCK_NONE"),
            ],
            response_mime_type="text/plain",
        )
        
        # Create a temporary directory to store the image
        temp_dir = tempfile.mkdtemp()
        generated_image_path = None
        generation_text = ""
        
        # Stream the content
        for chunk in client.models.generate_content_stream(
            model=model,
            contents=contents,
            config=generate_content_config,
        ):
            if not chunk.candidates or not chunk.candidates[0].content or not chunk.candidates[0].content.parts:
                continue
                
            if chunk.candidates[0].content.parts[0].inline_data:
                inline_data = chunk.candidates[0].content.parts[0].inline_data
                file_extension = mimetypes.guess_extension(inline_data.mime_type) or '.jpg'
                generated_image_path = os.path.join(temp_dir, f"{file_name}{file_extension}")
                
                with open(generated_image_path, "wb") as f:
                    f.write(inline_data.data)
                
                generation_text += f"Image of type {inline_data.mime_type} generated successfully."
            else:
                generation_text += chunk.text
        
        if generated_image_path:
            return generated_image_path, generation_text
        else:
            return None, "No image was generated. Try a different prompt."
            
    except Exception as e:
        return None, f"Error: {str(e)}"

def create_ui():
    with gr.Blocks(title="Gemini Image Generator") as demo:
        gr.Markdown("# Gemini Image Generator")
        gr.Markdown("Generate images using Google's Gemini 2.0 Flash Image Generation model")
        
        with gr.Row():
            with gr.Column():
                api_key = gr.Textbox(
                    label="Gemini API Key", 
                    placeholder="Enter your Gemini API key here",
                    type="password"
                )
                prompt = gr.Textbox(
                    label="Prompt", 
                    placeholder="Describe the image you want to generate",
                    lines=3
                )
                file_name = gr.Textbox(
                    label="Output File Name (optional)", 
                    placeholder="Enter a file name (without extension)"
                )
                generate_btn = gr.Button("Generate Image", variant="primary")
            
            with gr.Column():
                output_image = gr.Image(label="Generated Image", type="filepath")
                output_text = gr.Textbox(label="Generation Info", lines=2)
        
        generate_btn.click(
            fn=generate_image,
            inputs=[api_key, prompt, file_name],
            outputs=[output_image, output_text]
        )
        
        gr.Markdown("""
        ## How to use
        1. Enter your Gemini API key (get one from https://ai.google.dev/)
        2. Write a detailed prompt describing the image you want to generate
        3. (Optional) Provide a file name for your generated image
        4. Click "Generate Image" and wait for the result
        
        ## Notes
        - The model used is `gemini-2.0-flash-exp-image-generation`
        - All safety filters are set to "BLOCK_NONE" - use responsibly
        - Image generation may take a few seconds to complete
        """)
        
    return demo

if __name__ == "__main__":
    demo = create_ui()
    demo.launch()