import { afterEach, describe, expect, it } from "bun:test";
import { ExternalInformationClient, geocodeInput } from "../../src/product/external-information-client.js";
import { bindSessionCredential, credentialRefreshCoordinator, refreshSessionCredential, releaseSessionCredential } from "../../src/product/credential-refresh.js";

const originalFetch = globalThis.fetch;
const session = "external-information-test";
afterEach(() => { globalThis.fetch = originalFetch; releaseSessionCredential(session); });
describe("typed external information", () => {
  it("normalizes valid Tianditu coordinates for zoom_to_map and rejects fabricated coordinates", async () => {
    bindSessionCredential(session, { authorization: "Bearer TEST", projectId: "trusted" });
    globalThis.fetch = (async (url: Parameters<typeof fetch>[0], init?: RequestInit) => {
      expect(new URL(String(url)).pathname).toBe("/api/v1/geocoding-requests");
      expect(new Headers(init?.headers).get("Authorization")).toBe("Bearer TEST");
      expect(new Headers(init?.headers).get("X-Project-Id")).toBe("trusted");
      expect(JSON.parse(String(init?.body))).toEqual({ keyword: "北京市人民政府" });
      return Response.json({ status: "0", location: { lon: "116.4", lat: "39.9", level: 1 } });
    }) as unknown as typeof fetch;
    expect(await new ExternalInformationClient("http://server.test").geocode(session, { keyword: "北京市人民政府" })).toMatchObject({ source_crs: "EPSG:4326", center: [116.4, 39.9], location: { lon: 116.4, lat: 39.9 } });
    for (const data of [null, { status: "0", location: { lon: "", lat: " " } }, { status: "1" }, { status: "0", location: { lon: 181, lat: 39 } }, { status: "0", location: { lon: null, lat: null } }]) {
      globalThis.fetch = (async () => Response.json(data)) as unknown as typeof fetch;
      await expect(new ExternalInformationClient("http://server.test").geocode(session, { keyword: "北京市人民政府" })).rejects.toThrow("no valid coordinate");
    }
  });

  it("renews a rejected credential once and never turns a 403 into a renewal", async () => {
    bindSessionCredential(session, { authorization: "Bearer OLD", projectId: "trusted" });
    let requests = 0;
    const unsubscribe = credentialRefreshCoordinator.subscribe(session, (event) => {
      if (event.type === "credential_refresh_required") refreshSessionCredential(session, { authorization: "Bearer NEW", projectId: "trusted" }, event.requestId);
    });
    try {
      globalThis.fetch = (async (_url: Parameters<typeof fetch>[0], init?: RequestInit) => {
        requests++;
        return new Headers(init?.headers).get("Authorization") === "Bearer OLD" ? new Response(null, { status: 401 }) : Response.json({ status: "0", location: { lon: 116, lat: 39 } });
      }) as unknown as typeof fetch;
      await new ExternalInformationClient("http://server.test").geocode(session, { keyword: "北京" });
      expect(requests).toBe(2);
      globalThis.fetch = (async () => { requests++; return new Response(null, { status: 403 }); }) as unknown as typeof fetch;
      await expect(new ExternalInformationClient("http://server.test").geocode(session, { keyword: "北京" })).rejects.toMatchObject({ status: 403 });
      expect(requests).toBe(3);
    } finally { unsubscribe(); }
  });

  it("rejects scope, URL overrides and empty keywords before dispatch", async () => {
    expect(geocodeInput.safeParse({ keyword: "北京", url: "http://untrusted" }).success).toBeFalse();
    expect(geocodeInput.safeParse({ keyword: "北京", project_id: "other" }).success).toBeFalse();
    expect(geocodeInput.safeParse({ keyword: " " }).success).toBeFalse();
    await expect(new ExternalInformationClient().geocode(session, { keyword: "北京" })).rejects.toMatchObject({ status: 401 });
  });
});