import { beforeEach, describe, expect, it, vi } from "vitest";

const h = vi.hoisted(() => ({
  request: undefined as { url: string; headers: Headers } | undefined,
  createActivity: vi.fn(),
}));

vi.mock("@tanstack/react-start/server", () => ({
  getRequest: () => h.request,
}));

vi.mock("@/lib/pocketbase/client", () => ({
  pbAdmin: { authPromise: Promise.resolve(), createActivity: h.createActivity },
}));

vi.mock("@/lib/logger", () => ({
  Logger: class {
    error() {}
    info() {}
  },
}));

vi.mock("@/lib/telemetry/exclusions.server", () => ({
  isExcludedPlayerId: async (playerId?: string) => playerId === "excluded-player",
  isExcludedPhone: () => false,
}));

import { recordDeniedServerFn, serverFnLoggingMiddleware } from "./activities";
import { setRequestActor } from "@/lib/telemetry/request-context.server";
import { redirect } from "@tanstack/react-router";

type ServerHandler = (opts: {
  next: () => Promise<unknown>;
  data: unknown;
  context: unknown;
  serverFnMeta?: { id: string; name?: string; filename?: string };
}) => Promise<unknown>;

const runMiddleware = (opts: Parameters<ServerHandler>[0]) =>
  (serverFnLoggingMiddleware as any).options.server(opts) as ReturnType<ServerHandler>;

const setRequest = (url: string, userAgent = "vitest") => {
  h.request = { url, headers: new Headers({ "user-agent": userAgent }) };
};

const successEnvelope = { result: { success: true, data: {} } };

beforeEach(() => {
  h.createActivity.mockReset();
});

describe("serverFnLoggingMiddleware", () => {
  it("records the source name from the compile-time meta, not the hashed url segment", async () => {
    const hashedId = "a".repeat(64);
    setRequest(`http://localhost:3000/_serverFn/${hashedId}`);

    await runMiddleware({
      next: async () => successEnvelope,
      data: undefined,
      context: { metadata: { player_id: "p1" } },
      serverFnMeta: {
        id: hashedId,
        name: "updatePlayer",
        filename: "src/features/players/server.ts",
      },
    });

    await vi.waitFor(() => expect(h.createActivity).toHaveBeenCalledTimes(1));
    expect(h.createActivity.mock.calls[0][0]).toMatchObject({
      name: "updatePlayer",
      player: "p1",
      success: true,
      user_agent: "vitest",
    });
  });

  it("falls back to the last path segment when the meta carries no name", async () => {
    setRequest("http://localhost:3000/_serverFn/deadbeef");

    await runMiddleware({
      next: async () => successEnvelope,
      data: undefined,
      context: {},
      serverFnMeta: { id: "deadbeef" },
    });

    await vi.waitFor(() => expect(h.createActivity).toHaveBeenCalledTimes(1));
    expect(h.createActivity.mock.calls[0][0].name).toBe("deadbeef");
  });

  it("falls back to the last path segment when there is no meta at all", async () => {
    setRequest("http://localhost:3000/_serverFn/legacySegment");

    await runMiddleware({
      next: async () => successEnvelope,
      data: undefined,
      context: {},
    });

    await vi.waitFor(() => expect(h.createActivity).toHaveBeenCalledTimes(1));
    expect(h.createActivity.mock.calls[0][0].name).toBe("legacySegment");
  });

  it("records no player when the session has no player_id", async () => {
    setRequest("http://localhost:3000/_serverFn/doThing");

    await runMiddleware({
      next: async () => successEnvelope,
      data: undefined,
      context: {},
    });

    await vi.waitFor(() => expect(h.createActivity).toHaveBeenCalledTimes(1));
    expect(h.createActivity.mock.calls[0][0].player).toBeUndefined();
  });

  it("falls back to 'unknown' when the path has no trailing segment", async () => {
    setRequest("http://localhost:3000/");

    await runMiddleware({
      next: async () => successEnvelope,
      data: undefined,
      context: {},
    });

    await vi.waitFor(() => expect(h.createActivity).toHaveBeenCalledTimes(1));
    expect(h.createActivity.mock.calls[0][0].name).toBe("unknown");
  });

  it("records success:false by reading the returned envelope, not by throwing", async () => {
    setRequest("http://localhost:3000/_serverFn/doThing");

    await runMiddleware({
      next: async () => ({
        result: {
          success: false,
          error: { code: "NOT_FOUND", userMessage: "nope" },
        },
      }),
      data: undefined,
      context: {},
    });

    await vi.waitFor(() => expect(h.createActivity).toHaveBeenCalledTimes(1));
    const row = h.createActivity.mock.calls[0][0];
    expect(row.success).toBe(false);
    expect(row.error).toContain("NOT_FOUND");
  });

  it("records success:false and rethrows when the handler throws", async () => {
    setRequest("http://localhost:3000/_serverFn/doThing");

    await expect(
      runMiddleware({
        next: async () => {
          throw new Error("boom");
        },
        data: undefined,
        context: {},
      })
    ).rejects.toThrow("boom");

    await vi.waitFor(() => expect(h.createActivity).toHaveBeenCalledTimes(1));
    expect(h.createActivity.mock.calls[0][0]).toMatchObject({
      success: false,
      error: "boom",
    });
  });

  it("redacts sensitive argument keys before they reach the audit row", async () => {
    setRequest("http://localhost:3000/_serverFn/login");

    await runMiddleware({
      next: async () => successEnvelope,
      data: { phone: "+17135550142", first_name: "Ada" },
      context: {},
    });

    await vi.waitFor(() => expect(h.createActivity).toHaveBeenCalledTimes(1));
    expect(h.createActivity.mock.calls[0][0].arguments).toEqual({
      phone: "[redacted]",
      first_name: "Ada",
    });
  });

  it("truncates oversized arguments", async () => {
    setRequest("http://localhost:3000/_serverFn/doThing");

    await runMiddleware({
      next: async () => successEnvelope,
      data: { blob: "x".repeat(5000) },
      context: {},
    });

    await vi.waitFor(() => expect(h.createActivity).toHaveBeenCalledTimes(1));
    const args = h.createActivity.mock.calls[0][0].arguments;
    expect(args.truncated).toBeDefined();
    expect(args.truncated.length).toBeLessThanOrEqual(2048);
  });
});

const flushWrites = () => new Promise((resolve) => setTimeout(resolve, 20));

describe("serverFnLoggingMiddleware read handling", () => {
  it("skips successful read fns", async () => {
    setRequest("http://localhost:3000/_serverFn/x");

    await runMiddleware({
      next: async () => successEnvelope,
      data: undefined,
      context: {},
      serverFnMeta: { id: "x", name: "getPlayerStats" },
    });

    await flushWrites();
    expect(h.createActivity).not.toHaveBeenCalled();
  });

  it("records failed read fns", async () => {
    setRequest("http://localhost:3000/_serverFn/x");

    await runMiddleware({
      next: async () => ({
        result: { success: false, error: { code: "NOT_FOUND" } },
      }),
      data: undefined,
      context: {},
      serverFnMeta: { id: "x", name: "getPlayerStats" },
    });

    await vi.waitFor(() => expect(h.createActivity).toHaveBeenCalledTimes(1));
    expect(h.createActivity.mock.calls[0][0]).toMatchObject({
      name: "getPlayerStats",
      success: false,
    });
  });

  it("records thrown errors from read fns", async () => {
    setRequest("http://localhost:3000/_serverFn/x");

    await expect(
      runMiddleware({
        next: async () => {
          throw new Error("db down");
        },
        data: undefined,
        context: {},
        serverFnMeta: { id: "x", name: "listPlayers" },
      })
    ).rejects.toThrow("db down");

    await vi.waitFor(() => expect(h.createActivity).toHaveBeenCalledTimes(1));
  });
});

describe("serverFnLoggingMiddleware control flow and dedup", () => {
  it("does not record a thrown Response (session refresh)", async () => {
    setRequest("http://localhost:3000/_serverFn/doThing");

    await expect(
      runMiddleware({
        next: async () => {
          throw new Response("{}", { status: 401 });
        },
        data: undefined,
        context: {},
      })
    ).rejects.toBeInstanceOf(Response);

    await flushWrites();
    expect(h.createActivity).not.toHaveBeenCalled();
  });

  it("does not record thrown redirects", async () => {
    setRequest("http://localhost:3000/_serverFn/doThing");

    await expect(
      runMiddleware({
        next: async () => {
          throw redirect({ to: "/" });
        },
        data: undefined,
        context: {},
      })
    ).rejects.toBeDefined();

    await flushWrites();
    expect(h.createActivity).not.toHaveBeenCalled();
  });

  it("does not double-record when a denial was already recorded for the request", async () => {
    setRequest("http://localhost:3000/_serverFn/doThing");
    recordDeniedServerFn(h.request as unknown as Request, { player_id: "p1" }, { name: "doThing" });

    await expect(
      runMiddleware({
        next: async () => {
          throw new Error("Unauthorized");
        },
        data: undefined,
        context: {},
        serverFnMeta: { id: "x", name: "doThing" },
      })
    ).rejects.toThrow("Unauthorized");

    await flushWrites();
    expect(h.createActivity).toHaveBeenCalledTimes(1);
    expect(h.createActivity.mock.calls[0][0].error).toContain("FORBIDDEN");
  });

  it("does not record anonymous Unauthenticated failures", async () => {
    setRequest("http://localhost:3000/_serverFn/x");

    await expect(
      runMiddleware({
        next: async () => {
          throw new Error("Unauthenticated");
        },
        data: undefined,
        context: {},
        serverFnMeta: { id: "x", name: "fetchMe" },
      })
    ).rejects.toThrow("Unauthenticated");

    await flushWrites();
    expect(h.createActivity).not.toHaveBeenCalled();
  });

  it("still records Unauthenticated failures for identified actors", async () => {
    setRequest("http://localhost:3000/_serverFn/x");
    setRequestActor(h.request as unknown as Request, { playerId: "p1" });

    await expect(
      runMiddleware({
        next: async () => {
          throw new Error("Unauthenticated");
        },
        data: undefined,
        context: {},
        serverFnMeta: { id: "x", name: "fetchMe" },
      })
    ).rejects.toThrow("Unauthenticated");

    await vi.waitFor(() => expect(h.createActivity).toHaveBeenCalledTimes(1));
  });

  it("does not record activity for excluded players", async () => {
    setRequest("http://localhost:3000/_serverFn/doThing");
    setRequestActor(h.request as unknown as Request, { playerId: "excluded-player" });

    await runMiddleware({
      next: async () => successEnvelope,
      data: undefined,
      context: {},
    });

    await flushWrites();
    expect(h.createActivity).not.toHaveBeenCalled();
  });

  it("prefers the stashed request actor over middleware context", async () => {
    setRequest("http://localhost:3000/_serverFn/doThing");
    setRequestActor(h.request as unknown as Request, { playerId: "p9" });

    await runMiddleware({
      next: async () => successEnvelope,
      data: undefined,
      context: { metadata: { player_id: "p1" } },
    });

    await vi.waitFor(() => expect(h.createActivity).toHaveBeenCalledTimes(1));
    expect(h.createActivity.mock.calls[0][0].player).toBe("p9");
  });
});

describe("recordDeniedServerFn", () => {
  const deniedRequest = (url: string) =>
    ({ url, headers: new Headers({ "user-agent": "vitest" }) }) as Request;

  it("names the denial row from the meta so it matches the success rows", async () => {
    recordDeniedServerFn(
      deniedRequest(`http://localhost:3000/_serverFn/${"b".repeat(64)}`),
      { player_id: "p1" },
      { name: "createTournament" }
    );

    await vi.waitFor(() => expect(h.createActivity).toHaveBeenCalledTimes(1));
    expect(h.createActivity.mock.calls[0][0]).toMatchObject({
      name: "createTournament",
      player: "p1",
      success: false,
      error: "FORBIDDEN: Access denied",
    });
  });

  it("still records a name when the meta is absent", async () => {
    recordDeniedServerFn(
      deniedRequest("http://localhost:3000/_serverFn/rawSegment")
    );

    await vi.waitFor(() => expect(h.createActivity).toHaveBeenCalledTimes(1));
    expect(h.createActivity.mock.calls[0][0]).toMatchObject({
      name: "rawSegment",
      success: false,
    });
  });
});