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# prediction_state_service.py
import json
import os
from typing import Optional, List
from datetime import datetime
from prediction_state import PredictionState
from calendar_manager import CalendarManager
from typing import TYPE_CHECKING
if TYPE_CHECKING:
from prediction_controller import PredictionController
class PredictionStateService:
"""Service for saving and loading complete prediction states"""
DEFAULT_STATE_EXTENSION = '.prediction.json'
@staticmethod
def save_prediction_state(calendar_manager: CalendarManager,
prediction_controller,
filename: str) -> bool:
"""Save complete prediction state to file"""
try:
# Ensure proper extension
if not filename.endswith(PredictionStateService.DEFAULT_STATE_EXTENSION):
filename += PredictionStateService.DEFAULT_STATE_EXTENSION
# Create prediction state
state = PredictionState(
launch_date=prediction_controller.get_launch_date(),
duration_years=prediction_controller.get_duration().years if prediction_controller.get_duration() else None,
prediction_date=prediction_controller.get_prediction(),
entries=calendar_manager.list_entries()
)
# Ensure directory exists
os.makedirs(os.path.dirname(filename) if os.path.dirname(filename) else '.', exist_ok=True)
# Save to file with pretty formatting
with open(filename, 'w', encoding='utf-8') as f:
json.dump(state.to_dict(), f, indent=4, ensure_ascii=False)
return True
except Exception as e:
print(f"Error saving prediction state to file {filename}: {e}")
return False
@staticmethod
def load_prediction_state(filename: str) -> Optional[PredictionState]:
"""Load prediction state from file"""
try:
if not os.path.exists(filename):
print(f"File {filename} does not exist")
return None
with open(filename, 'r', encoding='utf-8') as f:
data = json.load(f)
return PredictionState.from_dict(data)
except (FileNotFoundError, json.JSONDecodeError) as e:
print(f"Error loading prediction state from file {filename}: {e}")
return None
except Exception as e:
print(f"Unexpected error loading prediction state from file {filename}: {e}")
return None
@staticmethod
def restore_from_state(state: PredictionState,
calendar_manager: CalendarManager,
prediction_controller) -> bool:
"""Restore calendar manager and prediction controller from state"""
try:
# Clear current entries and load from state
calendar_manager.clear_entries()
calendar_manager.entries.extend(state.entries)
# Restore prediction controller state if available
if state.launch_date and state.duration_years:
success = prediction_controller.set_parameters(
state.launch_date.isoformat(),
state.duration_years
)
if not success:
print("Warning: Could not restore prediction parameters")
return True
except Exception as e:
print(f"Error restoring from state: {e}")
return False
@staticmethod
def get_state_summary(filename: str):
"""Get summary information about a state file without loading entries"""
try:
if not os.path.exists(filename):
return None
with open(filename, 'r', encoding='utf-8') as f:
data = json.load(f)
return {
'version': data.get('version', 'Unknown'),
'created_at': data.get('created_at'),
'launch_date': data.get('launch_date'),
'duration_years': data.get('duration_years'),
'prediction_date': data.get('prediction_date'),
'entry_count': len(data.get('entries', []))
}
except Exception as e:
print(f"Error getting state summary from {filename}: {e}")
return None
@staticmethod
def list_state_files(directory: str = '.') -> List[str]:
"""List all prediction state files in a directory"""
try:
files = []
for filename in os.listdir(directory):
if filename.endswith(PredictionStateService.DEFAULT_STATE_EXTENSION):
files.append(os.path.join(directory, filename))
return sorted(files)
except Exception as e:
print(f"Error listing state files in {directory}: {e}")
return []
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