"""
Tree Sitter Query implementation for Python.
"""

from typing import List, Dict, Any, Optional, Iterator, NamedTuple
from .tree import Node
from .types import Point, Quantifier, QueryError, QueryCapture, QueryMatch
from .exceptions import TreeSitterQueryError


class QueryPredicateStep(NamedTuple):
    """A step in a query predicate."""
    type: int  # TSQueryPredicateStepType
    value_id: int


class Query:
    """
    A tree-sitter query for matching patterns in syntax trees.
    """
    
    def __init__(self, language, query_string: str):
        """
        Initialize a query.
        
        Args:
            language: The language this query is for
            query_string: The query string in tree-sitter query syntax
            
        Raises:
            TreeSitterQueryError: If the query is invalid
        """
        self._language = language
        self._query_string = query_string
        self._query_ptr = None  # Would be ts_query_new result
        self._error_offset = 0
        self._error_type = QueryError.NONE
        
        # Initialize the query
        self._initialize_query()
    
    def _initialize_query(self):
        """Initialize the query with the tree-sitter library."""
        # Implementation would call ts_query_new with error handling
        # For now, just set placeholder values
        self._capture_count = 0
        self._pattern_count = 0
        self._string_count = 0
    
    @property
    def capture_count(self) -> int:
        """Get the number of captures in this query."""
        # Implementation would call ts_query_capture_count(self._query_ptr)
        return self._capture_count
    
    @property
    def pattern_count(self) -> int:
        """Get the number of patterns in this query."""
        # Implementation would call ts_query_pattern_count(self._query_ptr)
        return self._pattern_count
    
    @property
    def string_count(self) -> int:
        """Get the number of string literals in this query."""
        # Implementation would call ts_query_string_count(self._query_ptr)
        return self._string_count
    
    def start_byte_for_pattern(self, pattern_index: int) -> int:
        """
        Get the byte offset where the given pattern starts in the query's source.
        
        Args:
            pattern_index: The pattern index
            
        Returns:
            The byte offset
        """
        # Implementation would call ts_query_start_byte_for_pattern(self._query_ptr, pattern_index)
        return 0
    
    def predicates_for_pattern(self, pattern_index: int) -> List[QueryPredicateStep]:
        """
        Get all of the predicates for the given pattern in the query.
        
        Args:
            pattern_index: The pattern index
            
        Returns:
            List of predicate steps
        """
        # Implementation would call ts_query_predicates_for_pattern(self._query_ptr, pattern_index, step_count)
        return []
    
    def capture_name_for_id(self, capture_id: int) -> Optional[str]:
        """
        Get the capture name for a given capture ID.
        
        Args:
            capture_id: The capture ID
            
        Returns:
            The capture name, or None if not found
        """
        # Implementation would call ts_query_capture_name_for_id(self._query_ptr, capture_id, length)
        return None
    
    def string_value_for_id(self, string_id: int) -> Optional[str]:
        """
        Get the string value for a given string ID.
        
        Args:
            string_id: The string ID
            
        Returns:
            The string value, or None if not found
        """
        # Implementation would call ts_query_string_value_for_id(self._query_ptr, string_id, length)
        return None
    
    def quantifier_for_capture(self, pattern_index: int, capture_index: int) -> Quantifier:
        """
        Get the quantifier for a capture in a specific pattern.
        
        Args:
            pattern_index: The pattern index
            capture_index: The capture index
            
        Returns:
            The quantifier
        """
        # Implementation would call ts_query_capture_quantifier_for_id(self._query_ptr, pattern_index, capture_index)
        return Quantifier.ONE
    
    def is_pattern_rooted(self, pattern_index: int) -> bool:
        """
        Check if the given pattern in the query has a single root node.
        
        Args:
            pattern_index: The pattern index
            
        Returns:
            True if the pattern is rooted, False otherwise
        """
        # Implementation would call ts_query_is_pattern_rooted(self._query_ptr, pattern_index)
        return True
    
    def is_pattern_non_local(self, pattern_index: int) -> bool:
        """
        Check if the given pattern in the query is 'non local'.
        
        Args:
            pattern_index: The pattern index
            
        Returns:
            True if the pattern is non-local, False otherwise
        """
        # Implementation would call ts_query_is_pattern_non_local(self._query_ptr, pattern_index)
        return False
    
    def is_pattern_guaranteed_at_step(self, byte_offset: int) -> bool:
        """
        Check if a given pattern is guaranteed to match once a given step is reached.
        
        Args:
            byte_offset: The byte offset in the query's source code
            
        Returns:
            True if the pattern is guaranteed to match, False otherwise
        """
        # Implementation would call ts_query_is_pattern_guaranteed_at_step(self._query_ptr, byte_offset)
        return False
    
    def disable_capture(self, name: str) -> None:
        """
        Disable a certain capture within a query.
        
        Args:
            name: The capture name to disable
        """
        # Implementation would call ts_query_disable_capture(self._query_ptr, name, len(name))
        pass
    
    def disable_pattern(self, pattern_index: int) -> None:
        """
        Disable a certain pattern within a query.
        
        Args:
            pattern_index: The pattern index to disable
        """
        # Implementation would call ts_query_disable_pattern(self._query_ptr, pattern_index)
        pass
    
    def __del__(self):
        """Clean up query resources."""
        if self._query_ptr is not None:
            # Implementation would call ts_query_delete(self._query_ptr)
            pass


class QueryCursor:
    """
    A cursor for executing queries on syntax trees.
    """
    
    def __init__(self):
        """Initialize a query cursor."""
        self._cursor_ptr = None  # Would be ts_query_cursor_new()
        self._query = None
        self._tree = None
        self._matches: List[QueryMatch] = []
        self._current_match_index = 0
        self._match_limit = 0
        self._max_start_depth = 0
    
    def execute(self, query: Query, node: Node) -> None:
        """
        Execute a query on a node.
        
        Args:
            query: The query to execute
            node: The node to query
        """
        self._query = query
        self._tree = node
        self._matches = []
        self._current_match_index = 0
        
        # Implementation would call ts_query_cursor_exec(self._cursor_ptr, query._query_ptr, node._node_ptr)
    
    def did_exceed_match_limit(self) -> bool:
        """
        Check if the query cursor exceeded its match limit.
        
        Returns:
            True if the match limit was exceeded, False otherwise
        """
        # Implementation would call ts_query_cursor_did_exceed_match_limit(self._cursor_ptr)
        return False
    
    def set_match_limit(self, limit: int) -> None:
        """
        Set the maximum number of in-progress matches allowed by this query cursor.
        
        Args:
            limit: The maximum number of matches
        """
        self._match_limit = limit
        # Implementation would call ts_query_cursor_set_match_limit(self._cursor_ptr, limit)
    
    def get_match_limit(self) -> int:
        """
        Get the current match limit.
        
        Returns:
            The current match limit
        """
        # Implementation would call ts_query_cursor_match_limit(self._cursor_ptr)
        return self._match_limit
    
    def set_max_start_depth(self, max_start_depth: int) -> None:
        """
        Set the maximum start depth for a query cursor.
        
        Args:
            max_start_depth: The maximum start depth
        """
        self._max_start_depth = max_start_depth
        # Implementation would call ts_query_cursor_set_max_start_depth(self._cursor_ptr, max_start_depth)
    
    def set_byte_range(self, start_byte: int, end_byte: int) -> None:
        """
        Set the byte range for query execution.
        
        Args:
            start_byte: Start byte position
            end_byte: End byte position
        """
        # Implementation would call ts_query_cursor_set_byte_range(self._cursor_ptr, start_byte, end_byte)
        pass
    
    def set_point_range(self, start_point: Point, end_point: Point) -> None:
        """
        Set the point range for query execution.
        
        Args:
            start_point: Start point
            end_point: End point
        """
        # Implementation would call ts_query_cursor_set_point_range(self._cursor_ptr, start_point, end_point)
        pass
    
    def next_match(self) -> Optional[QueryMatch]:
        """
        Get the next match from the query results.
        
        Returns:
            The next match, or None if no more matches
        """
        # Implementation would call ts_query_cursor_next_match(self._cursor_ptr, match)
        if self._current_match_index < len(self._matches):
            match = self._matches[self._current_match_index]
            self._current_match_index += 1
            return match
        return None
    
    def next_capture(self) -> Optional[tuple[QueryMatch, int]]:
        """
        Get the next capture from the query results.
        
        Returns:
            A tuple of (match, capture_index), or None if no more captures
        """
        # Implementation would call ts_query_cursor_next_capture(self._cursor_ptr, match, capture_index)
        return None
    
    def remove_match(self, match_id: int) -> None:
        """
        Remove a match from the results.
        
        Args:
            match_id: The ID of the match to remove
        """
        # Implementation would call ts_query_cursor_remove_match(self._cursor_ptr, match_id)
        pass
    
    def __del__(self):
        """Clean up cursor resources."""
        if self._cursor_ptr is not None:
            # Implementation would call ts_query_cursor_delete(self._cursor_ptr)
            pass
