"""
Stage 3: Response Compiler - Data Fusion
"""

from typing import Dict, Any, List


class ResponseCompiler:
    """Stage 3: Compile results from multiple servers"""

    def compile(self, raw_results: Dict[str, Any]) -> Dict[str, Any]:
        """
        Merge results into structured format
        
        Args:
            raw_results: Dictionary containing results from MCPExecutor
                {
                    "results": {
                        "weather": {"status": "success", "data": {...}},
                        "soil_properties": {"status": "success", "data": {...}},
                        ...
                    },
                    "execution_time_seconds": 3.5
                }
        
        Returns:
            {
                "successful_servers": List[str],
                "failed_servers": List[dict],
                "data": Dict[str, Any],
                "execution_time": float,
                "completeness": str
            }
        """
        results_dict = raw_results.get("results", {})

        successful = []
        failed = []
        compiled_data = {}

        for server_name, result in results_dict.items():
            if result.get("status") == "success":
                successful.append(server_name)
                compiled_data[server_name] = result.get("data", {})
            else:
                failed.append({
                    "server": server_name,
                    "error": result.get("error", "Unknown error")
                })

        return {
            "successful_servers": successful,
            "failed_servers": failed,
            "data": compiled_data,
            "execution_time": raw_results.get("execution_time_seconds", 0),
            "completeness": f"{len(successful)}/{len(results_dict)} servers"
        }