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',
        ]

        # 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)
            d = trade_order.__dict__
            d['input_asset'] = d['input'].asset
            d['input_amount'] = d['input'].amount
            d['output_asset'] = d['output'].asset
            d['output_amount'] = d['output'].amount
            d['fee_asset'] = d['fee'].asset
            d['fee_amount'] = d['fee'].amount
            del d['fee'], d['input'], d['output']
            writer.writerow(d)