import path from "node:path";
import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
import { withTempHome as withTempHomeBase } from "../../test/helpers/temp-home.js";
import { loadModelCatalog } from "../agents/model-catalog.js";
import { runEmbeddedPiAgent } from "../agents/pi-embedded.js";
import { loadSessionStore } from "../config/sessions.js";
import { getReplyFromConfig } from "./reply.js";

const MAIN_SESSION_KEY = "agent:main:main";

vi.mock("../agents/pi-embedded.js", () => ({
  abortEmbeddedPiRun: vi.fn().mockReturnValue(false),
  runEmbeddedPiAgent: vi.fn(),
  queueEmbeddedPiMessage: vi.fn().mockReturnValue(false),
  resolveEmbeddedSessionLane: (key: string) => `session:${key.trim() || "main"}`,
  isEmbeddedPiRunActive: vi.fn().mockReturnValue(false),
  isEmbeddedPiRunStreaming: vi.fn().mockReturnValue(false),
}));
vi.mock("../agents/model-catalog.js", () => ({
  loadModelCatalog: vi.fn(),
}));

async function withTempHome<T>(fn: (home: string) => Promise<T>): Promise<T> {
  return withTempHomeBase(
    async (home) => {
      return await fn(home);
    },
    {
      env: {
        CLAWDBOT_AGENT_DIR: (home) => path.join(home, ".clawdbot", "agent"),
        PI_CODING_AGENT_DIR: (home) => path.join(home, ".clawdbot", "agent"),
      },
      prefix: "clawdbot-reply-",
    },
  );
}

function _assertModelSelection(
  storePath: string,
  selection: { model?: string; provider?: string } = {},
) {
  const store = loadSessionStore(storePath);
  const entry = store[MAIN_SESSION_KEY];
  expect(entry).toBeDefined();
  expect(entry?.modelOverride).toBe(selection.model);
  expect(entry?.providerOverride).toBe(selection.provider);
}

describe("directive behavior", () => {
  beforeEach(() => {
    vi.mocked(runEmbeddedPiAgent).mockReset();
    vi.mocked(loadModelCatalog).mockResolvedValue([
      { id: "claude-opus-4-5", name: "Opus 4.5", provider: "anthropic" },
      { id: "claude-sonnet-4-1", name: "Sonnet 4.1", provider: "anthropic" },
      { id: "gpt-4.1-mini", name: "GPT-4.1 Mini", provider: "openai" },
    ]);
  });

  afterEach(() => {
    vi.restoreAllMocks();
  });

  it("defaults /think to low for reasoning-capable models when no default set", async () => {
    await withTempHome(async (home) => {
      vi.mocked(runEmbeddedPiAgent).mockReset();
      vi.mocked(loadModelCatalog).mockResolvedValueOnce([
        {
          id: "claude-opus-4-5",
          name: "Opus 4.5",
          provider: "anthropic",
          reasoning: true,
        },
      ]);

      const res = await getReplyFromConfig(
        { Body: "/think", From: "+1222", To: "+1222" },
        {},
        {
          agents: {
            defaults: {
              model: "anthropic/claude-opus-4-5",
              workspace: path.join(home, "clawd"),
            },
          },
          session: { store: path.join(home, "sessions.json") },
        },
      );

      const text = Array.isArray(res) ? res[0]?.text : res?.text;
      expect(text).toContain("Current thinking level: low");
      expect(text).toContain("Options: off, minimal, low, medium, high.");
      expect(runEmbeddedPiAgent).not.toHaveBeenCalled();
    });
  });
  it("shows off when /think has no argument and model lacks reasoning", async () => {
    await withTempHome(async (home) => {
      vi.mocked(runEmbeddedPiAgent).mockReset();
      vi.mocked(loadModelCatalog).mockResolvedValueOnce([
        {
          id: "claude-opus-4-5",
          name: "Opus 4.5",
          provider: "anthropic",
          reasoning: false,
        },
      ]);

      const res = await getReplyFromConfig(
        { Body: "/think", From: "+1222", To: "+1222" },
        {},
        {
          agents: {
            defaults: {
              model: "anthropic/claude-opus-4-5",
              workspace: path.join(home, "clawd"),
            },
          },
          session: { store: path.join(home, "sessions.json") },
        },
      );

      const text = Array.isArray(res) ? res[0]?.text : res?.text;
      expect(text).toContain("Current thinking level: off");
      expect(text).toContain("Options: off, minimal, low, medium, high.");
      expect(runEmbeddedPiAgent).not.toHaveBeenCalled();
    });
  });
  it("strips reply tags and maps reply_to_current to MessageSid", async () => {
    await withTempHome(async (home) => {
      vi.mocked(runEmbeddedPiAgent).mockResolvedValue({
        payloads: [{ text: "hello [[reply_to_current]]" }],
        meta: {
          durationMs: 5,
          agentMeta: { sessionId: "s", provider: "p", model: "m" },
        },
      });

      const res = await getReplyFromConfig(
        {
          Body: "ping",
          From: "+1004",
          To: "+2000",
          MessageSid: "msg-123",
        },
        {},
        {
          agents: {
            defaults: {
              model: "anthropic/claude-opus-4-5",
              workspace: path.join(home, "clawd"),
            },
          },
          channels: { whatsapp: { allowFrom: ["*"] } },
          session: { store: path.join(home, "sessions.json") },
        },
      );

      const payload = Array.isArray(res) ? res[0] : res;
      expect(payload?.text).toBe("hello");
      expect(payload?.replyToId).toBe("msg-123");
    });
  });
  it("strips reply tags with whitespace and maps reply_to_current to MessageSid", async () => {
    await withTempHome(async (home) => {
      vi.mocked(runEmbeddedPiAgent).mockResolvedValue({
        payloads: [{ text: "hello [[ reply_to_current ]]" }],
        meta: {
          durationMs: 5,
          agentMeta: { sessionId: "s", provider: "p", model: "m" },
        },
      });

      const res = await getReplyFromConfig(
        {
          Body: "ping",
          From: "+1004",
          To: "+2000",
          MessageSid: "msg-123",
        },
        {},
        {
          agents: {
            defaults: {
              model: "anthropic/claude-opus-4-5",
              workspace: path.join(home, "clawd"),
            },
          },
          channels: { whatsapp: { allowFrom: ["*"] } },
          session: { store: path.join(home, "sessions.json") },
        },
      );

      const payload = Array.isArray(res) ? res[0] : res;
      expect(payload?.text).toBe("hello");
      expect(payload?.replyToId).toBe("msg-123");
    });
  });
  it("prefers explicit reply_to id over reply_to_current", async () => {
    await withTempHome(async (home) => {
      vi.mocked(runEmbeddedPiAgent).mockResolvedValue({
        payloads: [
          {
            text: "hi [[reply_to_current]] [[reply_to:abc-456]]",
          },
        ],
        meta: {
          durationMs: 5,
          agentMeta: { sessionId: "s", provider: "p", model: "m" },
        },
      });

      const res = await getReplyFromConfig(
        {
          Body: "ping",
          From: "+1004",
          To: "+2000",
          MessageSid: "msg-123",
        },
        {},
        {
          agents: {
            defaults: {
              model: "anthropic/claude-opus-4-5",
              workspace: path.join(home, "clawd"),
            },
          },
          channels: { whatsapp: { allowFrom: ["*"] } },
          session: { store: path.join(home, "sessions.json") },
        },
      );

      const payload = Array.isArray(res) ? res[0] : res;
      expect(payload?.text).toBe("hi");
      expect(payload?.replyToId).toBe("abc-456");
    });
  });
  it("applies inline think and still runs agent content", async () => {
    await withTempHome(async (home) => {
      vi.mocked(runEmbeddedPiAgent).mockResolvedValue({
        payloads: [{ text: "done" }],
        meta: {
          durationMs: 5,
          agentMeta: { sessionId: "s", provider: "p", model: "m" },
        },
      });

      const res = await getReplyFromConfig(
        {
          Body: "please sync /think:high now",
          From: "+1004",
          To: "+2000",
        },
        {},
        {
          agents: {
            defaults: {
              model: "anthropic/claude-opus-4-5",
              workspace: path.join(home, "clawd"),
            },
          },
          channels: { whatsapp: { allowFrom: ["*"] } },
          session: { store: path.join(home, "sessions.json") },
        },
      );

      const texts = (Array.isArray(res) ? res : [res]).map((entry) => entry?.text).filter(Boolean);
      expect(texts).toContain("done");
      expect(runEmbeddedPiAgent).toHaveBeenCalledOnce();
    });
  });
});
