#!/usr/bin/env python3
"""
TARS Mission Logger
A simple utility to log mission outputs with timestamps.
"""

import json
import sys
from datetime import datetime
from pathlib import Path

class MissionLogger:
    def __init__(self, mission_name: str):
        self.mission_name = mission_name
        self.log_file = Path(f"missions/{mission_name}.json")
        self.log_file.parent.mkdir(exist_ok=True)
        self.entries = []
    
    def log(self, action: str, result: str):
        entry = {
            "timestamp": datetime.now().isoformat(),
            "action": action,
            "result": result
        }
        self.entries.append(entry)
    
    def save(self):
        with open(self.log_file, 'w') as f:
            json.dump(self.entries, f, indent=2)
        return f"Mission log saved to {self.log_file}"

if __name__ == "__main__":
    logger = MissionLogger(sys.argv[1] if len(sys.argv) > 1 else "default")
    logger.log("init", "Mission started")
    print(logger.save())