"""Base service for Git platforms"""

from abc import ABC, abstractmethod
from typing import List, Dict, Any, Optional
from dataclasses import dataclass


@dataclass
class FileChange:
    """Represents a changed file in PR"""
    filename: str
    status: str  # added, modified, removed
    additions: int
    deletions: int
    patch: Optional[str] = None
    content: Optional[str] = None


@dataclass
class PRInfo:
    """Pull request information"""
    number: int
    title: str
    description: str
    author: str
    source_branch: str
    target_branch: str
    url: str
    state: str


class BaseGitService(ABC):
    """Base class for Git platform services"""
    
    def __init__(self, base_url: str, token: str, repo_owner: str, repo_name: str):
        self.base_url = base_url.rstrip("/")
        self.token = token
        self.repo_owner = repo_owner
        self.repo_name = repo_name
    
    @abstractmethod
    async def get_pull_request(self, pr_number: int) -> PRInfo:
        """Get pull request information"""
        pass
    
    @abstractmethod
    async def get_pr_files(self, pr_number: int) -> List[FileChange]:
        """Get list of changed files in PR"""
        pass
    
    @abstractmethod
    async def get_file_content(self, file_path: str, ref: str) -> str:
        """Get file content at specific ref"""
        pass
    
    @abstractmethod
    async def create_review_comment(
        self,
        pr_number: int,
        file_path: str,
        line_number: int,
        comment: str,
        commit_id: str
    ) -> Dict[str, Any]:
        """Create a review comment on PR"""
        pass
    
    @abstractmethod
    async def create_review(
        self,
        pr_number: int,
        comments: List[Dict[str, Any]],
        body: str = ""
    ) -> Dict[str, Any]:
        """Create a review with multiple comments"""
        pass