const API_BASE = process.env.NEXT_PUBLIC_API_URL ?? "http://localhost:8000";

export interface Scenario {
  id: string;
  name: string;
  status: string;
  kpis_json: string | null;
  created_at: string;
}

export interface ProgressEvent {
  stage: string;
  pct: number;
}

export async function createScenario(name: string): Promise<Scenario> {
  const res = await fetch(`${API_BASE}/api/scenarios`, {
    method: "POST",
    headers: { "Content-Type": "application/json" },
    body: JSON.stringify({ name }),
  });
  if (!res.ok) throw new Error(`API error ${res.status}`);
  return res.json() as Promise<Scenario>;
}

export async function getScenario(id: string): Promise<Scenario> {
  const res = await fetch(`${API_BASE}/api/scenarios/${id}`);
  if (!res.ok) throw new Error(`API error ${res.status}`);
  return res.json() as Promise<Scenario>;
}

export async function listScenarios(): Promise<Scenario[]> {
  const res = await fetch(`${API_BASE}/api/scenarios`);
  if (!res.ok) throw new Error(`API error ${res.status}`);
  return res.json() as Promise<Scenario[]>;
}

export function scenarioEventsUrl(id: string): string {
  return `${API_BASE}/api/scenarios/${id}/events`;
}