import type { AxiosAdapter, AxiosError, InternalAxiosRequestConfig } from "axios";
import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";

const errorMessage = vi.fn();

vi.mock("element-plus", () => ({
  ElMessage: {
    error: errorMessage,
  },
}));

vi.mock("../utils/auth", () => ({
  getToken: vi.fn(() => undefined),
}));

describe("api axios retry", () => {
  beforeEach(() => {
    vi.useFakeTimers();
    vi.setSystemTime(1_000);
    errorMessage.mockClear();
  });

  afterEach(async () => {
    const { clearApiResponseCache, setApiResponseCacheScope } = await import("./axios");
    setApiResponseCacheScope(null);
    clearApiResponseCache();
    vi.useRealTimers();
  });

  it("retries network failures 10 times at 30 second intervals before showing one error", async () => {
    const api = (await import("./axios")).default;
    const adapter = vi.fn<AxiosAdapter>(async (config) => {
      const error = new Error("Network Error") as AxiosError;
      error.config = config as InternalAxiosRequestConfig;
      error.isAxiosError = true;
      return Promise.reject(error);
    });

    const request = api.get("/api/v1/projects", { adapter }).catch((error) => error);
    await vi.dynamicImportSettled();

    expect(adapter).toHaveBeenCalledTimes(1);
    expect(errorMessage).not.toHaveBeenCalled();

    for (let retry = 1; retry < 10; retry += 1) {
      await vi.advanceTimersByTimeAsync(30000);
      expect(adapter).toHaveBeenCalledTimes(retry + 1);
      expect(errorMessage).not.toHaveBeenCalled();
    }

    await vi.advanceTimersByTimeAsync(30000);
    expect(adapter).toHaveBeenCalledTimes(11);
    await expect(request).resolves.toMatchObject({ message: "Network Error" });
    expect(errorMessage).toHaveBeenCalledTimes(1);
  });

  it("deduplicates concurrent apiGet calls for the same request", async () => {
    const { apiGet } = await import("./axios");
    const adapter = vi.fn<AxiosAdapter>(async (config) => ({
      data: { ok: true },
      status: 200,
      statusText: "OK",
      headers: {},
      config: config as InternalAxiosRequestConfig,
    }));

    const [first, second] = await Promise.all([
      apiGet("/api/v1/studies/", { adapter }),
      apiGet("/api/v1/studies/", { adapter }),
    ]);

    expect(adapter).toHaveBeenCalledTimes(1);
    expect(first.data).toEqual({ ok: true });
    expect(second.data).toEqual({ ok: true });
  });

  it("does not deduplicate requests when disabled by the caller", async () => {
    const { apiGet } = await import("./axios");
    const adapter = vi.fn<AxiosAdapter>(async (config) => ({
      data: { ok: true },
      status: 200,
      statusText: "OK",
      headers: {},
      config: config as InternalAxiosRequestConfig,
    }));

    await Promise.all([
      apiGet("/api/v1/auth/login-key", { adapter, disableRequestDedupe: true }),
      apiGet("/api/v1/auth/login-key", { adapter, disableRequestDedupe: true }),
    ]);

    expect(adapter).toHaveBeenCalledTimes(2);
  });

  it("does not attach the CTMS login token to public share requests", async () => {
    const auth = await import("../utils/auth");
    vi.mocked(auth.getToken).mockReturnValue("private-login-token");
    const api = (await import("./axios")).default;
    const adapter = vi.fn<AxiosAdapter>(async (config) => ({
      data: { ok: true },
      status: 200,
      statusText: "OK",
      headers: {},
      config: config as InternalAxiosRequestConfig,
    }));

    await api.get("/api/v1/collaboration/shares/metadata", {
      adapter,
      publicRequest: true,
      headers: { "X-CTMS-Share-Token": "share-token" },
    } as any);

    const config = adapter.mock.calls[0]?.[0] as InternalAxiosRequestConfig;
    expect(config.headers.Authorization).toBeUndefined();
    expect(config.headers["X-CTMS-Share-Token"]).toBe("share-token");
    vi.mocked(auth.getToken).mockReturnValue(null);
  });

  it("keeps request headers in the dedupe key when they can affect the response", async () => {
    const { apiGet } = await import("./axios");
    const adapter = vi.fn<AxiosAdapter>(async (config) => ({
      data: { accept: (config.headers as any)?.Accept },
      status: 200,
      statusText: "OK",
      headers: {},
      config: config as InternalAxiosRequestConfig,
    }));

    const [json, csv] = await Promise.all([
      apiGet("/api/v1/reports", { adapter, headers: { Accept: "application/json" } }),
      apiGet("/api/v1/reports", { adapter, headers: { Accept: "text/csv" } }),
    ]);

    expect(adapter).toHaveBeenCalledTimes(2);
    expect(json.data).toEqual({ accept: "application/json" });
    expect(csv.data).toEqual({ accept: "text/csv" });
  });

  it("serves configured apiGet calls from memory cache until ttl expires", async () => {
    const { apiGet } = await import("./axios");
    let sequence = 0;
    const adapter = vi.fn<AxiosAdapter>(async (config) => ({
      data: { sequence: (sequence += 1) },
      status: 200,
      statusText: "OK",
      headers: { etag: "v1" },
      config: config as InternalAxiosRequestConfig,
    }));

    const first = await apiGet("/api/v1/studies/", { adapter, cache: { ttlMs: 1000, tags: ["studies"] } });
    const second = await apiGet("/api/v1/studies/", { adapter, cache: { ttlMs: 1000, tags: ["studies"] } });
    expect(first.data).toEqual({ sequence: 1 });
    expect(second.data).toEqual({ sequence: 1 });
    expect(adapter).toHaveBeenCalledTimes(1);

    await vi.advanceTimersByTimeAsync(1000);
    const third = await apiGet("/api/v1/studies/", { adapter, cache: { ttlMs: 1000, tags: ["studies"] } });
    expect(third.data).toEqual({ sequence: 2 });
    expect(adapter).toHaveBeenCalledTimes(2);
  });

  it("clears cached GET responses after successful mutations", async () => {
    const { apiGet, apiPost } = await import("./axios");
    let sequence = 0;
    const getAdapter = vi.fn<AxiosAdapter>(async (config) => ({
      data: { sequence: (sequence += 1) },
      status: 200,
      statusText: "OK",
      headers: {},
      config: config as InternalAxiosRequestConfig,
    }));
    const postAdapter = vi.fn<AxiosAdapter>(async (config) => ({
      data: { id: "study-1" },
      status: 200,
      statusText: "OK",
      headers: {},
      config: config as InternalAxiosRequestConfig,
    }));

    await apiGet("/api/v1/studies/", { adapter: getAdapter, cache: { ttlMs: 1000, tags: ["studies"] } });
    await apiGet("/api/v1/studies/", { adapter: getAdapter, cache: { ttlMs: 1000, tags: ["studies"] } });
    expect(getAdapter).toHaveBeenCalledTimes(1);

    await apiPost("/api/v1/studies/", { name: "Study" }, { adapter: postAdapter });
    const afterMutation = await apiGet("/api/v1/studies/", {
      adapter: getAdapter,
      cache: { ttlMs: 1000, tags: ["studies"] },
    });

    expect(afterMutation.data).toEqual({ sequence: 2 });
    expect(getAdapter).toHaveBeenCalledTimes(2);
    expect(postAdapter).toHaveBeenCalledTimes(1);
  });

  it("does not write an in-flight GET response into cache after the cache generation changes", async () => {
    const { apiGet, clearApiResponseCache } = await import("./axios");
    let sequence = 0;
    let resolveFirst: (() => void) | undefined;
    const adapter = vi.fn<AxiosAdapter>((config) => {
      sequence += 1;
      const response = {
        data: { sequence },
        status: 200,
        statusText: "OK",
        headers: {},
        config: config as InternalAxiosRequestConfig,
      };
      if (sequence === 1) {
        return new Promise((resolve) => {
          resolveFirst = () => resolve(response);
        });
      }
      return Promise.resolve(response);
    });

    const firstRequest = apiGet("/api/v1/studies/", { adapter, cache: { ttlMs: 1000, tags: ["studies"] } });
    await vi.dynamicImportSettled();
    expect(adapter).toHaveBeenCalledTimes(1);

    clearApiResponseCache();
    resolveFirst?.();
    await expect(firstRequest).resolves.toMatchObject({ data: { sequence: 1 } });

    const afterClear = await apiGet("/api/v1/studies/", { adapter, cache: { ttlMs: 1000, tags: ["studies"] } });
    expect(afterClear.data).toEqual({ sequence: 2 });
    expect(adapter).toHaveBeenCalledTimes(2);
  });
});