import gradio as gr
from datetime import datetime, timedelta
import google.generativeai as genai
from github import Github, GithubException
from urllib.parse import urlparse

def generate_release_notes(github_url, github_token, gemini_api_key, start_date, end_date):
    try:
        # Initialize GitHub client with the token
        g = Github(github_token)
        
        # Parse the full GitHub URL
        parsed_url = urlparse(github_url)
        path_parts = parsed_url.path.strip('/').split('/')
        owner = path_parts[0]
        repo_name = '/'.join(path_parts[1:]).rstrip('.git')
        
        # Get the repository
        repo = g.get_repo(f"{owner}/{repo_name}")
        
        # Get commits between start_date and end_date
        start_date = datetime.strptime(start_date, "%Y-%m-%d")
        end_date = datetime.strptime(end_date, "%Y-%m-%d")
        commits = list(repo.get_commits(since=start_date, until=end_date))
        
        # Prepare commit messages
        commit_messages = [commit.commit.message for commit in commits]
        commit_text = "\n".join(commit_messages)
        
        if not commit_text:
            return "No commits found in the specified date range."
        
        # Use Gemini AI to generate release notes
        genai.configure(api_key=gemini_api_key)
        model = genai.GenerativeModel('gemini-pro')
        
        prompt = f"""Based on the following commit messages, generate comprehensive release notes:

        {commit_text}

        Please organize the release notes into sections such as:
        1. New Features
        2. Bug Fixes
        3. Improvements
        4. Breaking Changes (if any)

        Provide a concise summary for each item."""

        response = model.generate_content(prompt)
        
        return response.text
    
    except GithubException as e:
        if e.status == 401:
            return "Error: Invalid GitHub token or insufficient permissions."
        elif e.status == 404:
            return f"Error: Repository not found. Please check the GitHub URL. Attempted to access: {owner}/{repo_name}"
        else:
            return f"GitHub API error: {str(e)}"
    except Exception as e:
        return f"An error occurred: {str(e)}"

# Set default dates
default_end_date = datetime.now()
default_start_date = default_end_date - timedelta(days=7)  # One week ago

# Create Gradio interface
iface = gr.Interface(
    fn=generate_release_notes,
    inputs=[
        gr.Textbox(label="GitHub Repository URL", placeholder="https://github.com/username/repo.git"),
        gr.Textbox(label="GitHub Personal Access Token", type="password"),
        gr.Textbox(label="Gemini API Key", type="password"),
        gr.Textbox(
            label="Start Date",
            placeholder="YYYY-MM-DD",
            value=default_start_date.strftime("%Y-%m-%d"),
        ),
        gr.Textbox(
            label="End Date",
            placeholder="YYYY-MM-DD",
            value=default_end_date.strftime("%Y-%m-%d"),
        )
    ],
    outputs=gr.Textbox(label="Generated Release Notes"),
    title="Automated Release Notes Generator",
    description="Generate release notes based on GitHub commits using Gemini AI. Enter start and end dates (YYYY-MM-DD) to define the time range for commits.",
    allow_flagging="never",
    theme="default",
    analytics_enabled=False,
)

# Launch the app
iface.launch()