import type { TrumpPost, Candle, BotTrade, BotPerformance } from '@/types'

const BASE_URL = process.env.NEXT_PUBLIC_API_URL || 'http://localhost:8000'

async function fetchJson<T>(path: string, init?: RequestInit): Promise<T> {
  const res = await fetch(`${BASE_URL}/api${path}`, {
    headers: { 'Content-Type': 'application/json' },
    ...init,
  })
  if (!res.ok) throw new Error(`API error ${res.status}: ${path}`)
  return res.json() as Promise<T>
}

export async function getPosts(limit = 20, page = 1): Promise<TrumpPost[]> {
  return fetchJson<TrumpPost[]>(`/posts?limit=${limit}&page=${page}`)
}

export async function getPost(id: number): Promise<TrumpPost> {
  return fetchJson<TrumpPost>(`/posts/${id}`)
}

export async function getPrices(asset: 'BTC' | 'ETH', tf: string): Promise<Candle[]> {
  return fetchJson<Candle[]>(`/prices/${asset}?tf=${tf}`)
}

export async function getTrades(limit = 20, page = 1): Promise<BotTrade[]> {
  return fetchJson<BotTrade[]>(`/trades?limit=${limit}&page=${page}`)
}

export async function getPerformance(): Promise<BotPerformance> {
  return fetchJson<BotPerformance>(`/performance`)
}

export async function subscribe(
  wallet: string,
  signature: string,
): Promise<{ success: boolean; message: string }> {
  return fetchJson<{ success: boolean; message: string }>(`/subscribe`, {
    method: 'POST',
    body: JSON.stringify({ wallet, signature }),
  })
}

export async function getUser(
  wallet: string,
): Promise<{ wallet_address: string; active: boolean; subscribed_at: string | null; hl_api_key_set: boolean; trades: BotTrade[] }> {
  return fetchJson<{ wallet_address: string; active: boolean; subscribed_at: string | null; hl_api_key_set: boolean; trades: BotTrade[] }>(
    `/user/${wallet}`,
  )
}