#!/bin/bash

# === Configuración ===
COIN_ID="tether"
VS_CURRENCY="eur"
OUTPUT="usdt-eur-2025.csv"

# Timestamps: 2025-01-01 00:00:00 a 2026-01-01 00:00:00 (en segundos UTC)
FROM_TIMESTAMP=$(date -j -f "%Y-%m-%d" "2025-01-01" +"%s")  # macOS
TO_TIMESTAMP=$(date -j -f "%Y-%m-%d" "2026-01-01" +"%s")

# === Llamada API CoinGecko ===
URL="https://api.coingecko.com/api/v3/coins/$COIN_ID/market_chart/range?vs_currency=$VS_CURRENCY&from=$FROM_TIMESTAMP&to=$TO_TIMESTAMP"

echo "📡 Consultando CoinGecko..."
RESPONSE=$(curl -s "$URL")

# === Procesar respuesta ===
echo "date,usdt_eur" > "$OUTPUT"

echo "$RESPONSE" | jq -c '.prices[]' | while read -r entry; do
  ts=$(echo "$entry" | jq '.[0]')
  price=$(echo "$entry" | jq '.[1]')

  # Convertir timestamp ms → fecha UTC
  date=$(date -j -u -r "$((ts/1000))" +"%Y-%m-%d")
  echo "$date,$price"
done | sort | uniq -f0 >> "$OUTPUT"

echo "✅ Guardado en $OUTPUT"