import csv
import dataclasses
from pathlib import Path

import fin_depo


@dataclasses.dataclass(frozen=True)
class CsvFileLogger:
    """Outputs the given `TradeOrderDetails` to the CSV file at the specified
    path.
    """

    path: Path

    def __call__(self, trade_order: fin_depo.data.TradeOrderDetails):
        fieldnames: list[str] = [
            'executed_time',
            'input_asset',
            'input_amount',
            'output_asset',
            'output_amount',
            'fee_asset',
            'fee_amount',
            'order_id',
            'raw_order_details',
        ]

        # Select data to write
        d = {
            'executed_time': trade_order.executed_time,
            'input_asset': trade_order.input.asset,
            'input_amount': trade_order.input.amount,
            'output_asset': trade_order.output.asset,
            'output_amount': trade_order.output.amount,
            'fee_asset': trade_order.fee.asset,
            'fee_amount': trade_order.fee.amount,
            'order_id': trade_order.order_id,
            'raw_order_details': trade_order.raw_order_details,
        }

        # Ensure that directory exists
        self.path.parent.mkdir(parents=True, exist_ok=True)

        # Write row in CSV file
        with open(self.path, 'a') as f:
            writer = csv.DictWriter(f, fieldnames=fieldnames)
            writer.writerow(d)
            del d