import type { ClaudeAuth, ClaudeOrg, ClaudeUsageResponse } from "@/types/claude";

const BASE_URL = "https://claude.ai/api";

const BROWSER_UA =
  "Mozilla/5.0 (Linux; Android 10; Mobile) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Mobile Safari/537.36";

function buildHeaders(auth: ClaudeAuth): Record<string, string> {
  const cookies = [`sessionKey=${auth.sessionKey}`];
  if (auth.lastActiveOrg) cookies.push(`lastActiveOrg=${auth.lastActiveOrg}`);
  return {
    Cookie: cookies.join("; "),
    Accept: "application/json, text/plain, */*",
    "Accept-Language": "en-US,en;q=0.9",
    "User-Agent": BROWSER_UA,
    Referer: "https://claude.ai/",
    Origin: "https://claude.ai",
    "anthropic-client-platform": "web_claude_to_cc_migration",
  };
}

export async function fetchClaudeOrgs(auth: ClaudeAuth): Promise<ClaudeOrg[]> {
  const response = await fetch(`${BASE_URL}/organizations`, {
    headers: buildHeaders(auth),
    credentials: "omit",
  });

  if (!response.ok) {
    await response.text().catch(() => null);
    if (response.status === 401 || response.status === 403) throw new Error("TOKEN_EXPIRED");
    throw new Error(`HTTP_ERROR_${response.status}`);
  }

  return response.json() as Promise<ClaudeOrg[]>;
}

export async function fetchClaudeUsage(
  auth: ClaudeAuth,
  orgUuid: string
): Promise<ClaudeUsageResponse> {
  const response = await fetch(`${BASE_URL}/organizations/${orgUuid}/usage`, {
    headers: buildHeaders(auth),
    credentials: "omit",
  });

  if (!response.ok) {
    await response.text().catch(() => null);
    if (response.status === 401 || response.status === 403) throw new Error("TOKEN_EXPIRED");
    throw new Error(`HTTP_ERROR_${response.status}`);
  }

  return response.json() as Promise<ClaudeUsageResponse>;
}