import re
import html
from utils import find_squad
from auth import login, get_csrf_token, EDIT_MILESTONE_URL, session

def update_milestone(pr_data):
    login()
    """Update milestone with PR title using CSRF token."""
    csrf_token = get_csrf_token()
    if not csrf_token:
        print("Failed to get CSRF token.")
        return False

    meta = get_milestone(session)
    content = create_milestone_content(meta.get("content"), pr_data)

    print(f"Updating milestone with content:\n")

    with open("content.md", "w") as file:
        file.write(content)

    payload = {
        "_csrf": csrf_token,
        "title": meta.get("title"),
        "content": content,
        "deadline": meta.get("deadline")
    }
    headers = {
        "Content-Type": "application/x-www-form-urlencoded"
    }


    response = session.post(EDIT_MILESTONE_URL, data=payload, headers=headers)

    if response.status_code == 200:
        print("Milestone updated successfully!")
        return True
    elif response.status_code == 401:  # Unauthorized → Need to re-login
        print("Session expired, re-logging in...")
        if login():
            return update_milestone(pr_data)
    else:
        print(f"Failed to update milestone: {response.status_code} - {response.text}")
        return False

def create_milestone_content(content, pr_data):
    if content:
        # From PR Data, get branch type, and username to assign it to identifier. like feature owi, then it should be
        # in feature_lambda
        type_task = pr_data.get("task_type")
        squad = "sigma"
        identifier = f'{type_task}_{squad}'
        content = append_item_to_identifier(content, identifier, pr_data)
        return f"{content}\n"
    else:
        return f"- [] {pr_data['title']}"

def get_milestone(session):
    """Fetch milestone details."""
    response = session.get(EDIT_MILESTONE_URL)
    if response.status_code == 200:
        title_match = re.search(r'<input[^>]*name=["\']title["\'][^>]*value=["\'](.* ?)["\']', response.text, re.IGNORECASE)
        content_match = re.search(r'<textarea[^>]*name=["\']content["\'][^>]*>(.*?)</textarea>', response.text, re.IGNORECASE | re.DOTALL)
        deadline_match = re.search(r'<input[^>]*name=["\']deadline["\'][^>]*value=["\'](.*?)["\']', response.text, re.IGNORECASE)
        title = title_match.group(1) if title_match else None
        content = content_match.group(1).strip() if content_match else None
        deadline = deadline_match.group(1) if deadline_match else None
        return {'title': title, 'content': content, 'deadline': deadline}
    else:
        print(f"Failed to fetch milestone: {response.status_code}")
        return None

def append_item_to_identifier(encoded_content, identifier, new_item):
    # Extract the block delimited by the identifier markers
    content = html.unescape(encoded_content)
    block_pattern = rf'(<!--\s*{identifier}\s*-->)(.*?)(<!--\s*/{identifier}\s*-->)'
    block_match = re.search(block_pattern, content, re.DOTALL)
    if not block_match:
        print(f"Block with identifier '{identifier}' not found.")
        return False

    # Extract the parts of the block
    start_marker = block_match.group(1)
    block_content = block_match.group(2).strip()
    end_marker = block_match.group(3)

    # Append the new item to the block content
    formatted_item = f"- [x] {new_item['username']}: [{new_item['title']}]({new_item['link_evoluz']})"
    updated_block_content = f"{block_content}\n{formatted_item}"

    # Reconstruct the content with the updated block
    updated_content = f"{start_marker}\n{updated_block_content}\n{end_marker}"
    content = content.replace(block_match.group(0), updated_content)

    print(f"New item appended to '{identifier}' block.")
    return content