charts.ts

import { z } from 'zod';

const API_KEY = process.env.CG_API_KEY;
const BASE_URL = process.env.CG_BASE_URL || 'https://api.coingecko.com/api/v3';

const tokenSchema = z.object({
  id: z.string(),
});

const priceHistorySchema = z.object({
  prices: z.array(z.tuple([z.number(), z.number()])),
});

export const getTokenId = async (contractAddress: string): Promise<string> => {
  if (!API_KEY) {
    throw new Error('API key not found');
  }
  const url = `${BASE_URL}/coins/solana/contract/${contractAddress}`;
  const options = {
    method: 'GET',
    headers: {
      accept: 'application/json',
      'x-cg-demo-api-key': API_KEY,
    },
  };

  const response = await fetch(url, options);
  if (!response.ok) {
    throw new Error('Failed to fetch token ID');
  }

  const data = await response.json();
  const parsed = tokenSchema.parse(data);
  return parsed.id;
};

export const getPriceHistory = async (
  tokenId: string,
  days: number = 7,
): Promise<{ time: string; value: number }[]> => {
  if (!API_KEY) {
    throw new Error('API key not found');
  }
  const url = `${BASE_URL}/coins/${tokenId}/market_chart?vs_currency=usd&days=${days}&precision=18`;
  const options = {
    method: 'GET',
    headers: {
      accept: 'application/json',
      'x-cg-demo-api-key': API_KEY,
    },
  };

  const response = await fetch(url, options);
  if (!response.ok) {
    throw new Error('Failed to fetch price history');
  }

  const data = await response.json();
  const parsed = priceHistorySchema.parse(data);
  return parsed.prices.map(([time, value]) => ({
    time: new Date(time).toLocaleString(),
    value,
  }));
};