#!/bin/bash

OUTPUT="usdt-eur-2025.csv"
> "$OUTPUT"
echo '"date","usdt_eur"' > "$OUTPUT"

START_DATE="2025-01-01"
END_DATE="2025-01-31"
CURRENT_DATE="$START_DATE"

while [[ "$CURRENT_DATE" < "$END_DATE" ]]; do
  # Formatear fecha como DD-MM-YYYY (requerido por CoinGecko)
  FORMATTED=$(date -j -f "%Y-%m-%d" "$CURRENT_DATE" "+%d-%m-%Y")
  
  echo "🔄 Consultando precio para $CURRENT_DATE..."

  PRICE=$(curl -s "https://api.coingecko.com/api/v3/coins/tether/history?date=${FORMATTED}&localization=false" \
    | jq -r '.market_data.current_price.eur // empty')

  if [[ -n "$PRICE" ]]; then
    echo "\"$CURRENT_DATE\",\"$PRICE\"" >> "$OUTPUT"
  else
    echo "\"$CURRENT_DATE\",\"N/A\"" >> "$OUTPUT"
  fi

  CURRENT_DATE=$(date -j -v+1d -f "%Y-%m-%d" "$CURRENT_DATE" "+%Y-%m-%d")
  sleep 2  # Evita ser bloqueado por CoinGecko
done

echo "✅ Exportado como $OUTPUT"