import os
import time
from github import Github
import requests
import random
import string


def create_github_repo(token, repo_name, private=False):
    """إنشاء ريبوزيتوري جديد على GitHub مع التحقق من الاسم الفريد"""
    g = Github(token)
    user = g.get_user()
    
    # Try to create repo with original name
    original_name = repo_name
    counter = 1
    max_attempts = 100  # Allow up to 100 attempts (my-website-1 through my-website-100)
    
    for attempt in range(max_attempts):
        try:
            repo = user.create_repo(repo_name, private=private)
            return repo
        except Exception as e:
            error_str = str(e)
            # Check if error is due to name already existing
            if "name already exists" in error_str or "422" in error_str:
                # Add number suffix: (1), (2), (3), etc.
                repo_name = f"{original_name}-{counter}"
                counter += 1
            else:
                # Check for 404 which usually means scope issues
                if "404" in error_str:
                    raise Exception("GitHub API returned 404 (Not Found). This usually means your Token lacks the 'repo' scope or 'Administration' write permission. Please ensure your token has full repo access.")
                # Different error, re-raise
                raise
    
    # If all attempts failed, raise the last exception
    raise Exception(f"Failed to create repository after {max_attempts} attempts")

def upload_files_to_repo(repo, local_dir, branch=None):
    """
    Upload all files from a local directory to the repository.
    Automatically detects the default branch if not specified.
    """
    # 1. Determine the target branch
    if not branch:
        try:
            branch = repo.default_branch
        except Exception:
            branch = "main"

    # 2. Upload files
    for root, _, files in os.walk(local_dir):
        for file_name in files:
            full_path = os.path.join(root, file_name)
            with open(full_path, "rb") as f:
                content = f.read()
            
            relative_path = os.path.relpath(full_path, local_dir).replace("\\", "/")
            
            # Retry mechanism for "Fresh" repositories (handles API propagation lag)
            max_retries = 3
            for attempt in range(max_retries):
                try:
                    # Check if file exists to update it
                    try:
                        contents = repo.get_contents(relative_path, ref=branch)
                        repo.update_file(
                            path=relative_path,
                            message=f"Update {relative_path}",
                            content=content,
                            sha=contents.sha,
                            branch=branch
                        )
                        print(f"Updated {relative_path}")
                    except Exception as e:
                        # If not found (404), create it
                        if "404" in str(e) or "Not Found" in str(e):
                            repo.create_file(
                                path=relative_path,
                                message=f"Add {relative_path}",
                                content=content,
                                branch=branch
                            )
                            print(f"Created {relative_path}")
                        else:
                            raise e
                    break # Success, break retry loop
                except Exception as e:
                    if attempt < max_retries - 1:
                        print(f"Retrying upload for {relative_path} (Attempt {attempt+2}/{max_retries})...")
                        time.sleep(2)
                    else:
                        print(f"Error with {relative_path} after {max_retries} attempts: {e}")
                        raise e


def enable_github_pages(username, repo_name, token):
    """تفعيل GitHub Pages"""
    pages_url = f"https://api.github.com/repos/{username}/{repo_name}/pages"
    headers = {
        "Authorization": f"token {token}",
        "Accept": "application/vnd.github.v3+json"
    }
    payload = {"source": {"branch": "main", "path": "/"}}
    response = requests.post(pages_url, headers=headers, json=payload)
    return response.status_code in [201, 204]

def get_repository(username, repo_name, token):
    """
    Retrieve an existing GitHub repository.
    
    Args:
        username: GitHub username
        repo_name: Repository name
        token: GitHub personal access token
        
    Returns:
        Repository object or None if not found
    """
    try:
        g = Github(token)
        repo = g.get_repo(f"{username}/{repo_name}")
        return repo
    except Exception as e:
        if "404" in str(e):
            print(f"Info: Repository '{repo_name}' not found on GitHub. A new one will be created.")
        else:
            print(f"GitHub Repository lookup error: {e}")
        return None


def update_file_in_repo(repo, file_path, content, commit_message="Update file"):
    """
    Update an existing file in the repository.
    
    Args:
        repo: Repository object
        file_path: Path to file in repository (e.g., "index.html")
        content: New file content (string or bytes)
        commit_message: Commit message
        
    Returns:
        True if successful, False otherwise
    """
    try:
        # Get the file from the repository
        file = repo.get_contents(file_path)
        
        # Update the file
        repo.update_file(
            path=file_path,
            message=commit_message,
            content=content,
            sha=file.sha,
            branch="main"
        )
        print(f"Updated {file_path} in repository")
        return True
    except Exception as e:
        print(f"Error updating file: {e}")
        return False

def resync_webcraft_file(username, repo_name, token, html_file_path, commit_message="Resync from WebCraft"):
    """
    Resync WebCraft HTML file with existing GitHub repository.
    
    Args:
        username: GitHub username
        repo_name: Repository name
        token: GitHub personal access token
        html_file_path: Path to local HTML file
        commit_message: Commit message for the update
        
    Returns:
        dict with status and URL, or error message
    """
    try:
        # Get the repository
        repo = get_repository(username, repo_name, token)
        if not repo:
            return {
                "status": "error",
                "message": f"Repository '{repo_name}' not found"
            }
        
        # Read the HTML file
        with open(html_file_path, 'rb') as f:
            content = f.read()
        
        # Find the HTML file in the repository (usually index.html)
        filename = os.path.basename(html_file_path)
        
        # Update the file
        if update_file_in_repo(repo, filename, content, commit_message):
            site_url = f"https://{username}.github.io/{repo_name}/"
            return {
                "status": "success",
                "message": "Repository synced successfully",
                "website_url": site_url,
                "repo_url": repo.html_url
            }
        else:
            return {
                "status": "error",
                "message": "Failed to update file in repository"
            }
    
    except Exception as e:
        return {
            "status": "error",
            "message": str(e)
        }