import gradio as gr
import requests
import json
import paramiko
import os
import google.generativeai as genai

def fetch_github_file(github_url, ssh_private_key):
    try:
        # Parse the GitHub URL
        parts = github_url.split('/')
        owner = parts[3]
        repo = parts[4]
        branch = parts[6]
        file_path = '/'.join(parts[7:])

        # Set up SSH client
        ssh = paramiko.SSHClient()
        ssh.set_missing_host_key_policy(paramiko.AutoAddPolicy())

        # Create a temporary file to store the SSH private key
        with open('temp_key', 'w') as key_file:
            key_file.write(ssh_private_key)

        # Connect to GitHub using SSH
        ssh.connect('github.com', username='git', key_filename='temp_key')

        # Execute git command to fetch file content
        stdin, stdout, stderr = ssh.exec_command(f"git archive --remote=git@github.com:{owner}/{repo}.git {branch} {file_path} | tar -xO")
        file_content = stdout.read().decode('utf-8')

        # Close SSH connection and remove temporary key file
        ssh.close()
        os.remove('temp_key')

        if not file_content:
            return "Error: File not found or empty."

        return file_content
    except Exception as e:
        return f"Error accessing GitHub: {str(e)}"

def process_with_gemini(file_content, gemini_api_key):
    genai.configure(api_key=gemini_api_key)
    model = genai.GenerativeModel('gemini-2.5-pro-preview-03-25')
    
    prompt = f"""
    Analyze the following file content for open-source license information:

    {file_content}

    Please provide:
    1. A list of dependencies and their versions
    2. The licenses associated with each dependency (if available)
    3. A summary of the project based on these dependencies
    4. Any potential license conflicts or considerations
    5. Suggestions for best practices in open-source license management for this project
    """

    response = model.generate_content(prompt)
    return response.text

def process_input(file, github_url, ssh_private_key, gemini_api_key):
    if file is not None and github_url:
        return "Error: Please either upload a file OR provide a GitHub URL, not both."
    
    if file is not None:
        file_content = file.decode('utf-8')
    elif github_url and ssh_private_key:
        if not github_url.startswith("https://github.com/"):
            return "Error: Invalid GitHub URL. Please use the format: https://github.com/username/repository/blob/branch/path/to/file"
        if not ssh_private_key.strip():
            return "Error: SSH Private Key is empty. Please provide a valid key."
        file_content = fetch_github_file(github_url, ssh_private_key)
        if file_content.startswith("Error:"):
            return file_content
    else:
        return "Error: Please either upload a file OR provide both GitHub URL and SSH Private Key."
    
    try:
        # Process the file content with Gemini
        analysis = process_with_gemini(file_content, gemini_api_key)
        return analysis
    except Exception as e:
        return f"Error processing the file: {str(e)}"

iface = gr.Interface(
    fn=process_input,
    inputs=[
        gr.File(label="Upload dependency file (e.g., requirements.txt, package.json, Gemfile)"),
        gr.Textbox(label="GitHub File URL (optional)"),
        gr.Textbox(label="SSH Private Key (required if using GitHub URL)", type="password"),
        gr.Textbox(label="Gemini API Key", type="password"),
    ],
    outputs=gr.Textbox(label="License Information and Analysis"),
    title="Open Source License Extractor",
    description="Upload a dependency file OR provide a GitHub file URL to extract and analyze open-source license information.",
)

if __name__ == "__main__":
    iface.launch()