"""Synchronization store tools."""

from typing import Dict, Any, List
from langchain_core.tools import tool


def _get_registry():
    """Get the global registry instance."""
    from . import _registry
    return _registry


@tool
def list_sync_stores() -> List[str]:
    """List all available synchronization stores.

    Returns:
        List of store names that can be read/written
    """
    registry = _get_registry()
    if not registry:
        return []
    return list(registry.entries.keys())


@tool
def read_sync_state(store_name: str) -> Dict[str, Any]:
    """Read the current state of a synchronization store.

    Args:
        store_name: Name of the store to read (e.g., "TraderState", "StrategyState")

    Returns:
        Dictionary containing the current state of the store

    Raises:
        ValueError: If store_name doesn't exist
    """
    registry = _get_registry()
    if not registry:
        raise ValueError("SyncRegistry not initialized")

    entry = registry.entries.get(store_name)
    if not entry:
        available = list(registry.entries.keys())
        raise ValueError(f"Store '{store_name}' not found. Available stores: {available}")

    return entry.model.model_dump(mode="json")


@tool
async def write_sync_state(store_name: str, updates: Dict[str, Any]) -> Dict[str, str]:
    """Update the state of a synchronization store.

    This will apply the updates to the store and trigger synchronization
    with all connected clients.

    Args:
        store_name: Name of the store to update
        updates: Dictionary of field updates (field_name: new_value)

    Returns:
        Dictionary with status and updated fields

    Raises:
        ValueError: If store_name doesn't exist or updates are invalid
    """
    registry = _get_registry()
    if not registry:
        raise ValueError("SyncRegistry not initialized")

    entry = registry.entries.get(store_name)
    if not entry:
        available = list(registry.entries.keys())
        raise ValueError(f"Store '{store_name}' not found. Available stores: {available}")

    try:
        # Get current state
        current_state = entry.model.model_dump(mode="json")

        # Apply updates
        new_state = {**current_state, **updates}

        # Update the model
        registry._update_model(entry.model, new_state)

        # Trigger sync
        await registry.push_all()

        return {
            "status": "success",
            "store": store_name,
            "updated_fields": list(updates.keys())
        }

    except Exception as e:
        raise ValueError(f"Failed to update store '{store_name}': {str(e)}")


@tool
def get_store_schema(store_name: str) -> Dict[str, Any]:
    """Get the schema/structure of a synchronization store.

    This shows what fields are available and their types.

    Args:
        store_name: Name of the store

    Returns:
        Dictionary describing the store's schema

    Raises:
        ValueError: If store_name doesn't exist
    """
    registry = _get_registry()
    if not registry:
        raise ValueError("SyncRegistry not initialized")

    entry = registry.entries.get(store_name)
    if not entry:
        available = list(registry.entries.keys())
        raise ValueError(f"Store '{store_name}' not found. Available stores: {available}")

    # Get model schema
    schema = entry.model.model_json_schema()

    return {
        "store_name": store_name,
        "schema": schema
    }


SYNC_TOOLS = [
    list_sync_stores,
    read_sync_state,
    write_sync_state,
    get_store_schema
]