"""MCP tools for code intelligence."""

from typing import Dict, Any, List, Optional
from ..graph import GraphService


class SearchTools:
    """Search-related MCP tools."""
    
    def __init__(self, graph: GraphService, vector=None, parser=None, cache=None):
        self.graph = graph
        self.vector = vector
        self.parser = parser
        self.cache = cache
    
    async def find_usages(self, name: str, file_path: Optional[str] = None) -> Dict[str, Any]:
        """Find all usages of a symbol."""
        # Find the symbol first
        symbols = await self.graph.find_symbol(name=name, file_path=file_path)
        
        if not symbols:
            return {
                "error": f"Symbol '{name}' not found",
                "suggestions": []  # TODO: Add fuzzy matching
            }
        
        # Get usages for the first matching symbol
        symbol = symbols[0]
        usages = await self.graph.find_usages(symbol['id'])
        
        return {
            "symbol": {
                "name": symbol['name'],
                "type": symbol['symbol_type'],
                "file": symbol['file_path'],
                "line": symbol['line_start']
            },
            "usages": usages,
            "total_usages": len(usages)
        }
    
    async def find_similar_code(self, code_snippet: str, limit: int = 10) -> List[Dict[str, Any]]:
        """Find similar code using vector search."""
        # TODO: Implement vector search
        return [{"message": "Vector search not yet implemented"}]
    
    async def search_by_pattern(self, pattern: str, language: Optional[str] = None) -> List[Dict[str, Any]]:
        """Search using tree-sitter patterns."""
        # TODO: Implement pattern search
        return [{"message": "Pattern search not yet implemented"}]


class AnalysisTools:
    """Analysis-related MCP tools."""
    
    def __init__(self, graph: GraphService):
        self.graph = graph
    
    async def find_dependencies(self, name: str, depth: int = 3) -> Dict[str, Any]:
        """Find dependencies of a symbol."""
        symbols = await self.graph.find_symbol(name=name)
        
        if not symbols:
            return {"error": f"Symbol '{name}' not found"}
        
        deps = await self.graph.find_dependencies(symbols[0]['id'])
        
        return {
            "symbol": name,
            "dependencies": deps,
            "total_dependencies": len(deps)
        }
    
    async def analyze_impact(self, name: str, change_type: str = "modify") -> Dict[str, Any]:
        """Analyze impact of changing a symbol."""
        # TODO: Implement full impact analysis
        symbols = await self.graph.find_symbol(name=name)
        
        if not symbols:
            return {"error": f"Symbol '{name}' not found"}
        
        # Get direct and transitive dependencies
        usages = await self.graph.find_usages(symbols[0]['id'])
        
        return {
            "symbol": name,
            "change_type": change_type,
            "directly_affected": len(usages),
            "affected_files": list(set(u['file_path'] for u in usages)),
            "risk_level": "medium" if len(usages) > 5 else "low"
        }


class IndexTools:
    """Indexing-related MCP tools."""
    
    def __init__(self, graph: GraphService):
        self.graph = graph
    
    async def update_index(
        self, 
        paths: Optional[List[str]] = None,
        full_rebuild: bool = False
    ) -> Dict[str, Any]:
        """Update the code index."""
        # TODO: Implement actual indexing
        return {
            "status": "not_implemented",
            "message": "Indexing will be implemented in the next phase",
            "paths": paths,
            "full_rebuild": full_rebuild
        }


class VizTools:
    """Visualization-related MCP tools."""
    
    def __init__(self, graph: GraphService):
        self.graph = graph
    
    async def generate_call_graph(self, name: str) -> Dict[str, Any]:
        """Generate call graph visualization."""
        # TODO: Implement visualization
        return {"message": "Visualization not yet implemented"}


__all__ = ["SearchTools", "AnalysisTools", "IndexTools", "VizTools"]
