AITrader/app/routes/api/indicators.ts

import { type IndicatorData } from "../../types";
import {
  calculateSMA,
  calculateEMA,
  calculateRSI,
  calculateMACD,
} from "../../utils/indicators";

// Replace with actual Alpaca API call
async function fetchHistoricPrices(symbol: string): Promise<number[]> {
  return [
    150.0, 152.3, 151.8, 153.5, 155.0, 154.2, 156.7, 158.1, 157.5, 159.0,
    160.2, 158.9, 161.5, 163.0, 162.5, 164.8, 166.3, 165.0, 167.5, 169.0,
    168.2, 170.5, 172.0, 171.5, 173.2,
  ];
}

export async function loader({ request }: { request: Request }) {
  const url = new URL(request.url);
  const symbol = url.searchParams.get("symbol");

  if (!symbol) {
    return Response.json(
      { error: "Symbol is required" },
      { status: 400 }
    );
  }

  try {
    const prices = await fetchHistoricPrices(symbol.toUpperCase());
    if (prices.length === 0) {
      return Response.json(
        { error: "No price data found" },
        { status: 404 }
      );
    }

    const sma = calculateSMA(prices);
    const ema = calculateEMA(prices);
    const rsi = calculateRSI(prices);
    const macd = calculateMACD(prices);

    const data: IndicatorData = {
      symbol: symbol.toUpperCase(),
      indicators: { sma, ema, rsi, macd },
    };
    return Response.json(data);
  } catch (error) {
    return Response.json(
      { error: "Failed to fetch indicators" },
      { status: 500 }
    );
  }
}