"""Tools for Gitea issue operations."""

import json
import logging
from typing import Any
from gitea.client import GiteaClient
from gitea.models import IssueModel, CommentModel, LabelModel

logger: logging.Logger = logging.getLogger("gitea.tools.issue_tools")


class IssueTools:
    """Tools for Gitea issue operations."""

    def __init__(self, client: GiteaClient) -> None:
        self._client = client

    def get_issue(self, owner: str, repo: str, issue_number: int) -> IssueModel:
        try:
            return self._client.issues.get_issue(owner, repo, issue_number)
        except Exception as e:
            logger.error(f"Error getting issue #{issue_number}: {e}", exc_info=True)
            raise

    def close_issue(self, owner: str, repo: str, issue_number: int) -> str:
        try:
            self._client.issues.close_issue(owner, repo, issue_number)
            return f"Issue #{issue_number} closed successfully."
        except Exception as e:
            logger.error(
                f"Failed to close issue #{issue_number} in {owner}/{repo}: {e}",
                exc_info=True,
            )
            return (
                f"Error: Could not close issue #{issue_number} in {owner}/{repo}. "
                f"Check permissions or if the issue is already closed. Details: {e}"
            )

    def get_issue_comments(
        self,
        owner: str,
        repo: str,
        issue_number: int,
        limit: int = 20,
        offset: int = 0,
    ) -> str:
        """Get comments on an issue with optional paging.

        Args:
            limit: Maximum number of comments to return (default 20).
            offset: Zero-based comment index to start from (default 0).
        """
        try:
            comments: list[CommentModel] = self._client.issues.get_issue_comments(
                owner, repo, issue_number
            )
            total: int = len(comments)
            page: list[CommentModel] = comments[offset : offset + limit]
            result: str = json.dumps([c.model_dump() for c in page], indent=2)
            if total > offset + limit:
                next_offset: int = offset + limit
                result += (
                    f"\n\n[{total} comments total — showing {offset}–{offset + len(page)}. "
                    f"Re-call with offset={next_offset} to see more.]"
                )
            return result
        except Exception as e:
            logger.error(
                f"Failed to get comments for issue #{issue_number} in {owner}/{repo}: {e}",
                exc_info=True,
            )
            return (
                f"Error: Could not retrieve comments for issue #{issue_number} in {owner}/{repo}. "
                f"Verify the issue exists and you have access. Details: {e}"
            )

    def list_assigned_issues(self) -> list[dict[str, Any]]:
        try:
            repos = self._client.repos.list_all_user_repos()
            all_issues: list[dict[str, Any]] = []
            for repo in repos:
                owner = repo.owner
                repo_name = repo.name
                issues = self._client.issues.list_assigned_issues(owner, repo_name)
                if issues:
                    all_issues.extend(
                        [
                            issue.model_dump()
                            if hasattr(issue, "model_dump")
                            else issue
                            for issue in issues
                        ]
                    )
            return all_issues
        except Exception as e:
            logger.error(f"Error listing assigned issues: {e}", exc_info=True)
            return []

    def list_issues(self, owner: str, repo: str, state: str = "open") -> str:
        try:
            issues = self._client.issues.list_repo_issues(owner, repo, state)
            if not issues:
                return f"No {state} issues in {owner}/{repo}."
            summary = [f"#{issue.number}: {issue.title}" for issue in issues]
            return "\n".join(summary)
        except Exception as e:
            logger.error(
                f"Failed to list {state} issues in {owner}/{repo}: {e}",
                exc_info=True,
            )
            return (
                f"Error: Could not list issues for {owner}/{repo}. "
                f"Verify the repository exists and you have access. Details: {e}"
            )

    def create_issue(
        self,
        owner: str,
        repo: str,
        title: str,
        body: str,
        labels: list[str] | None = None,
        assignees: list[str] | None = None,
    ) -> str:
        try:
            issue = self._client.issues.create_issue(
                owner, repo, title, body, labels, assignees
            )
            return f"Issue #{issue.number} created successfully in {owner}/{repo}."
        except Exception as e:
            logger.error(
                f"Failed to create issue '{title}' in {owner}/{repo}: {e}",
                exc_info=True,
            )
            return (
                f"Error: Could not create issue '{title}' in {owner}/{repo}. "
                f"Check repository permissions and label/assignee names. Details: {e}"
            )

    def add_label_to_issue(
        self, owner: str, repo: str, issue_number: int, label: str
    ) -> str:
        try:
            self._client.issues.add_label(owner, repo, issue_number, label)
            return f"Label '{label}' added to issue #{issue_number}."
        except Exception as e:
            logger.error(
                f"Failed to add label '{label}' to issue #{issue_number} in {owner}/{repo}: {e}",
                exc_info=True,
            )
            return (
                f"Error: Could not add label '{label}' to issue #{issue_number} in {owner}/{repo}. "
                f"Verify the label exists in the repository. Details: {e}"
            )

    def add_comment_to_issue(
        self, owner: str, repo: str, issue_number: int, body: str
    ) -> str:
        try:
            self._client.issues.add_comment(owner, repo, issue_number, body)
            return f"Comment added to issue #{issue_number}."
        except Exception as e:
            logger.error(
                f"Failed to add comment to issue #{issue_number} in {owner}/{repo}: {e}",
                exc_info=True,
            )
            return (
                f"Error: Could not add comment to issue #{issue_number} in {owner}/{repo}. "
                f"Verify the issue exists and you have write access. Details: {e}"
            )