"""
SearchService Module

Provides high-level search functionality for Elasticsearch backend.

For the full implementation, see:
https://github.com/paulkokos/project-management-dashboard/blob/master/backend/projects/search.py
"""

from typing import Dict, List, Any, Optional
from django.contrib.auth.models import User


class SearchService:
    """
    Main search service for querying Elasticsearch.

    This class provides a high-level interface for searching projects,
    with support for filtering, pagination, and faceted results.

    Example:
        ```python
        from project_search import SearchService

        service = SearchService()

        # Simple search
        results = service.search(
            query="mobile app",
            user=request.user
        )

        # Search with filters and pagination
        results = service.search(
            query="mobile app",
            filters={"status": "active", "health": "healthy"},
            page=1,
            page_size=20,
            user=request.user
        )
        ```
    """

    def search(
        self,
        query: str,
        filters: Optional[Dict[str, str]] = None,
        page: int = 1,
        page_size: int = 20,
        user: Optional[User] = None,
    ) -> Dict[str, Any]:
        """
        Search for projects using Elasticsearch.

        Args:
            query: Search query string
            filters: Optional filters (status, health, owner)
            page: Page number (1-indexed)
            page_size: Results per page
            user: User for permission filtering

        Returns:
            Dictionary with:
                - results: List of search results
                - facets: Available filter options with counts
                - total: Total number of results
                - page: Current page number
                - page_size: Results per page
                - total_pages: Total number of pages

        Raises:
            ValueError: If query is empty
            PermissionDenied: If user lacks permission

        Note:
            Results are automatically filtered based on user permissions.
            Only projects the user has access to will be returned.
        """
        raise NotImplementedError(
            "This is a stub. Use the full implementation from the main project."
        )

    def autocomplete(
        self,
        query: str,
        limit: int = 10,
        user: Optional[User] = None,
    ) -> List[Dict[str, Any]]:
        """
        Get autocomplete suggestions.

        Args:
            query: Partial query for prefix matching (min 2 chars)
            limit: Maximum number of suggestions
            user: User for permission filtering

        Returns:
            List of suggestions with:
                - title: Suggestion text
                - id: Object ID
                - type: Object type (project, milestone, etc.)

        Raises:
            ValueError: If query is less than 2 characters
        """
        raise NotImplementedError(
            "This is a stub. Use the full implementation from the main project."
        )
