import { describe, expect, it, vi } from "vitest";
import { registerPluginHttpRoute } from "./http-registry.js";
import { createEmptyPluginRegistry } from "./registry.js";

function expectRouteRegistrationDenied(params: {
  replaceExisting: boolean;
  expectedLogFragment: string;
}) {
  const registry = createEmptyPluginRegistry();
  const logs: string[] = [];

  registerPluginHttpRoute({
    path: "/plugins/demo",
    auth: "plugin",
    handler: vi.fn(),
    registry,
    pluginId: "demo-a",
    source: "demo-a-src",
    log: (msg) => logs.push(msg),
  });

  const unregister = registerPluginHttpRoute({
    path: "/plugins/demo",
    auth: "plugin",
    ...(params.replaceExisting ? { replaceExisting: true } : {}),
    handler: vi.fn(),
    registry,
    pluginId: "demo-b",
    source: "demo-b-src",
    log: (msg) => logs.push(msg),
  });

  expect(registry.httpRoutes).toHaveLength(1);
  expect(logs.at(-1)).toContain(params.expectedLogFragment);

  unregister();
  expect(registry.httpRoutes).toHaveLength(1);
}

describe("registerPluginHttpRoute", () => {
  it("registers route and unregisters it", () => {
    const registry = createEmptyPluginRegistry();
    const handler = vi.fn();

    const unregister = registerPluginHttpRoute({
      path: "/plugins/demo",
      auth: "plugin",
      handler,
      registry,
    });

    expect(registry.httpRoutes).toHaveLength(1);
    expect(registry.httpRoutes[0]?.path).toBe("/plugins/demo");
    expect(registry.httpRoutes[0]?.handler).toBe(handler);
    expect(registry.httpRoutes[0]?.auth).toBe("plugin");
    expect(registry.httpRoutes[0]?.match).toBe("exact");

    unregister();
    expect(registry.httpRoutes).toHaveLength(0);
  });

  it("returns noop unregister when path is missing", () => {
    const registry = createEmptyPluginRegistry();
    const logs: string[] = [];
    const unregister = registerPluginHttpRoute({
      path: "",
      auth: "plugin",
      handler: vi.fn(),
      registry,
      accountId: "default",
      log: (msg) => logs.push(msg),
    });

    expect(registry.httpRoutes).toHaveLength(0);
    expect(logs).toEqual(['plugin: webhook path missing for account "default"']);
    expect(() => unregister()).not.toThrow();
  });

  it("replaces stale route on same path when replaceExisting=true", () => {
    const registry = createEmptyPluginRegistry();
    const logs: string[] = [];
    const firstHandler = vi.fn();
    const secondHandler = vi.fn();

    const unregisterFirst = registerPluginHttpRoute({
      path: "/plugins/synology",
      auth: "plugin",
      handler: firstHandler,
      registry,
      accountId: "default",
      pluginId: "synology-chat",
      log: (msg) => logs.push(msg),
    });

    const unregisterSecond = registerPluginHttpRoute({
      path: "/plugins/synology",
      auth: "plugin",
      replaceExisting: true,
      handler: secondHandler,
      registry,
      accountId: "default",
      pluginId: "synology-chat",
      log: (msg) => logs.push(msg),
    });

    expect(registry.httpRoutes).toHaveLength(1);
    expect(registry.httpRoutes[0]?.handler).toBe(secondHandler);
    expect(logs).toContain(
      'plugin: replacing stale webhook path /plugins/synology (exact) for account "default" (synology-chat)',
    );

    // Old unregister must not remove the replacement route.
    unregisterFirst();
    expect(registry.httpRoutes).toHaveLength(1);
    expect(registry.httpRoutes[0]?.handler).toBe(secondHandler);

    unregisterSecond();
    expect(registry.httpRoutes).toHaveLength(0);
  });

  it("rejects conflicting route registrations without replaceExisting", () => {
    expectRouteRegistrationDenied({
      replaceExisting: false,
      expectedLogFragment: "route conflict",
    });
  });

  it("rejects route replacement when a different plugin owns the route", () => {
    expectRouteRegistrationDenied({
      replaceExisting: true,
      expectedLogFragment: "route replacement denied",
    });
  });
});
