"""
Tree Sitter WebAssembly integration for Python.
"""

from typing import Optional, Dict, Any
from .language import Language
from .exceptions import TreeSitterException


class WasmErrorKind:
    """WebAssembly error kinds."""
    NONE = 0
    PARSE = 1
    COMPILE = 2
    INSTANTIATE = 3
    ALLOCATE = 4


class WasmError:
    """WebAssembly error information."""
    
    def __init__(self, kind: int, message: str):
        """
        Initialize a WebAssembly error.
        
        Args:
            kind: The error kind
            message: The error message
        """
        self.kind = kind
        self.message = message
    
    def __str__(self) -> str:
        """String representation of the error."""
        return f"WasmError({self.kind}): {self.message}"


class WasmEngine:
    """WebAssembly engine for tree-sitter."""
    
    def __init__(self):
        """Initialize a WebAssembly engine."""
        self._engine_ptr = None  # Would be wasm_engine_t instance
        self._initialize_engine()
    
    def _initialize_engine(self):
        """Initialize the WebAssembly engine."""
        # Implementation would create a wasm_engine_t instance
        pass
    
    def __del__(self):
        """Clean up engine resources."""
        if self._engine_ptr is not None:
            # Implementation would free the engine
            pass


class WasmStore:
    """WebAssembly store for tree-sitter."""
    
    def __init__(self, engine: WasmEngine):
        """
        Initialize a WebAssembly store.
        
        Args:
            engine: The WebAssembly engine to use
            
        Raises:
            TreeSitterException: If store creation fails
        """
        self._engine = engine
        self._store_ptr = None  # Would be TSWasmStore instance
        self._languages: Dict[str, Language] = {}
        
        # Initialize the store
        self._initialize_store()
    
    def _initialize_store(self):
        """Initialize the WebAssembly store."""
        # Implementation would call ts_wasm_store_new(self._engine._engine_ptr, error)
        pass
    
    def load_language(self, name: str, wasm_data: bytes) -> Language:
        """
        Load a language from WebAssembly data.
        
        Args:
            name: The language name
            wasm_data: The WebAssembly bytecode
            
        Returns:
            A new language instance
            
        Raises:
            TreeSitterException: If loading fails
        """
        # Implementation would call ts_wasm_store_load_language(self._store_ptr, name, wasm_data, len(wasm_data), error)
        if name in self._languages:
            return self._languages[name]
        
        # Create a placeholder language
        language = Language()
        self._languages[name] = language
        return language
    
    def get_language_count(self) -> int:
        """
        Get the number of languages instantiated in this store.
        
        Returns:
            The number of languages
        """
        # Implementation would call ts_wasm_store_language_count(self._store_ptr)
        return len(self._languages)
    
    def get_language_names(self) -> list[str]:
        """
        Get the names of all loaded languages.
        
        Returns:
            List of language names
        """
        return list(self._languages.keys())
    
    def __del__(self):
        """Clean up store resources."""
        if self._store_ptr is not None:
            # Implementation would call ts_wasm_store_delete(self._store_ptr)
            pass


class WasmParser:
    """Parser with WebAssembly support."""
    
    def __init__(self, wasm_store: Optional[WasmStore] = None):
        """
        Initialize a WebAssembly-enabled parser.
        
        Args:
            wasm_store: Optional WebAssembly store
        """
        self._wasm_store = wasm_store
        self._parser = None  # Would be TSParser instance
    
    def set_wasm_store(self, wasm_store: WasmStore) -> None:
        """
        Set the WebAssembly store for this parser.
        
        Args:
            wasm_store: The WebAssembly store to use
        """
        self._wasm_store = wasm_store
        # Implementation would call ts_parser_set_wasm_store(self._parser, wasm_store._store_ptr)
    
    def get_wasm_store(self) -> Optional[WasmStore]:
        """
        Get the current WebAssembly store.
        
        Returns:
            The current WebAssembly store, or None if not set
        """
        return self._wasm_store
    
    def take_wasm_store(self) -> Optional[WasmStore]:
        """
        Remove and return the parser's current WebAssembly store.
        
        Returns:
            The WebAssembly store, or None if not set
        """
        # Implementation would call ts_parser_take_wasm_store(self._parser)
        store = self._wasm_store
        self._wasm_store = None
        return store
