import type {
  ScreenerResult,
  MarketContext,
  MarketCall,
  CalendarEvent,
  CatalystStory,
  LLMAnalysis,
  PortfolioHolding,
  PortfolioAdvice,
} from '$lib/types.js';

const BASE = '/api';

// ── Screener ──────────────────────────────────────────────────────────────────

export async function screenTickers(tickers: string[]): Promise<ScreenerResult> {
  const res = await fetch(`${BASE}/screen`, {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify({ tickers }),
  });
  if (!res.ok) throw new Error(await res.text());
  return res.json();
}

export async function fetchCatalysts(): Promise<{ tickers: string[]; stories: CatalystStory[] }> {
  const res = await fetch(`${BASE}/screen/catalysts`);
  if (!res.ok) throw new Error(await res.text());
  return res.json();
}

export async function analyzeTickers(tickers: string[]): Promise<{ analysis: LLMAnalysis | null }> {
  const res = await fetch(`${BASE}/analyze`, {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify({ tickers }),
  });
  if (!res.ok) throw new Error(await res.text());
  return res.json();
}

// ── Finance / Portfolio ───────────────────────────────────────────────────────

export async function fetchPortfolio(): Promise<{
  advice: PortfolioAdvice[];
  holdings: PortfolioHolding[];
  marketContext: MarketContext | null;
  netWorth: number | null;
  error?: string;
}> {
  const res = await fetch(`${BASE}/finance/portfolio`);
  if (!res.ok) throw new Error(await res.text());
  return res.json();
}

export async function addHolding(
  holding: Omit<PortfolioHolding, never>,
): Promise<{ holdings: PortfolioHolding[] }> {
  const res = await fetch(`${BASE}/finance/holdings`, {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify(holding),
  });
  if (!res.ok) throw new Error(await res.text());
  return res.json();
}

export async function removeHolding(ticker: string): Promise<{ holdings: PortfolioHolding[] }> {
  const res = await fetch(`${BASE}/finance/holdings/${ticker}`, {
    method: 'DELETE',
  });
  if (!res.ok) throw new Error(await res.text());
  return res.json();
}

export async function fetchMarketContext(): Promise<MarketContext> {
  const res = await fetch(`${BASE}/finance/market-context`);
  if (!res.ok) throw new Error(await res.text());
  return res.json();
}

// ── Market Calls ──────────────────────────────────────────────────────────────

export async function fetchCalls(): Promise<{ calls: MarketCall[] }> {
  const res = await fetch(`${BASE}/calls`);
  if (!res.ok) throw new Error(await res.text());
  return res.json();
}

export async function fetchCall(id: string): Promise<MarketCall & { current: ScreenerResult }> {
  const res = await fetch(`${BASE}/calls/${id}`);
  if (!res.ok) throw new Error(await res.text());
  return res.json();
}

export async function createCall(payload: {
  title: string;
  quarter: string;
  thesis: string;
  tickers: string[];
  date?: string;
}): Promise<MarketCall> {
  const res = await fetch(`${BASE}/calls`, {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify(payload),
  });
  if (!res.ok) throw new Error(await res.text());
  return res.json();
}

export async function deleteCall(id: string): Promise<{ ok: boolean }> {
  const res = await fetch(`${BASE}/calls/${id}`, { method: 'DELETE' });
  if (!res.ok) throw new Error(await res.text());
  return res.json();
}

export async function fetchCallsCalendar(
  tickers: string[] | null = null,
): Promise<{ events: CalendarEvent[] }> {
  const url = tickers?.length
    ? `${BASE}/calls/calendar?tickers=${tickers.join(',')}`
    : `${BASE}/calls/calendar`;
  const res = await fetch(url);
  if (!res.ok) throw new Error(await res.text());
  return res.json();
}