import { beforeEach, describe, expect, it, vi } from "vitest";
import { createHookRunner } from "./hooks.js";
import { addTestHook, TEST_PLUGIN_AGENT_CTX } from "./hooks.test-helpers.js";
import { createEmptyPluginRegistry, type PluginRegistry } from "./registry.js";
import type { PluginHookRegistration } from "./types.js";

describe("hook correlation fields", () => {
  let registry: PluginRegistry;

  beforeEach(() => {
    registry = createEmptyPluginRegistry();
  });

  it("adds runId to legacy before_agent_start events from hook context", async () => {
    const handler = vi.fn(() => undefined);
    addTestHook({
      registry,
      pluginId: "plugin-a",
      hookName: "before_agent_start",
      handler: handler as PluginHookRegistration["handler"],
    });

    const runner = createHookRunner(registry);
    await runner.runBeforeAgentStart({ prompt: "hello" }, TEST_PLUGIN_AGENT_CTX);

    expect(handler).toHaveBeenCalledWith(
      expect.objectContaining({ prompt: "hello", runId: "test-run-id" }),
      TEST_PLUGIN_AGENT_CTX,
    );
  });

  it("adds runId to agent_end events from hook context", async () => {
    const handler = vi.fn(() => undefined);
    addTestHook({
      registry,
      pluginId: "plugin-a",
      hookName: "agent_end",
      handler: handler as PluginHookRegistration["handler"],
    });

    const runner = createHookRunner(registry);
    await runner.runAgentEnd(
      {
        messages: [],
        success: true,
      },
      TEST_PLUGIN_AGENT_CTX,
    );

    expect(handler).toHaveBeenCalledWith(
      expect.objectContaining({ messages: [], success: true, runId: "test-run-id" }),
      TEST_PLUGIN_AGENT_CTX,
    );
  });

  it("times out never-settling agent_end handlers", async () => {
    vi.useFakeTimers();
    try {
      const handler = vi.fn(() => new Promise<void>(() => {}));
      addTestHook({
        registry,
        pluginId: "plugin-a",
        hookName: "agent_end",
        handler: handler as PluginHookRegistration["handler"],
      });
      const logger = {
        error: vi.fn(),
        warn: vi.fn(),
      };

      const runner = createHookRunner(registry, {
        logger,
        voidHookTimeoutMsByHook: { agent_end: 5 },
      });
      const run = runner.runAgentEnd({ messages: [], success: true }, TEST_PLUGIN_AGENT_CTX);

      await vi.advanceTimersByTimeAsync(5);

      await expect(run).resolves.toBeUndefined();
      expect(logger.error).toHaveBeenCalledWith(
        expect.stringContaining(
          "[hooks] agent_end handler from plugin-a failed: timed out after 5ms",
        ),
      );
    } finally {
      vi.useRealTimers();
    }
  });

  it("honors per-hook registration timeouts over the default void hook timeout", async () => {
    vi.useFakeTimers();
    try {
      const handler = vi.fn(
        async () =>
          await new Promise<void>((resolve) => {
            setTimeout(resolve, 20);
          }),
      );
      addTestHook({
        registry,
        pluginId: "plugin-a",
        hookName: "agent_end",
        handler: handler as PluginHookRegistration["handler"],
        timeoutMs: 30,
      });
      const logger = {
        error: vi.fn(),
        warn: vi.fn(),
      };

      const runner = createHookRunner(registry, {
        logger,
        voidHookTimeoutMsByHook: { agent_end: 5 },
      });
      const run = runner.runAgentEnd({ messages: [], success: true }, TEST_PLUGIN_AGENT_CTX);

      await vi.advanceTimersByTimeAsync(20);

      await expect(run).resolves.toBeUndefined();
      expect(logger.error).not.toHaveBeenCalled();
    } finally {
      vi.useRealTimers();
    }
  });
});