import { describe, expect, it, beforeEach, afterEach, vi } from "vitest";
import type { ServerAdapterModule } from "../adapters/index.js";

const hermesExecuteMock = vi.hoisted(() =>
  vi.fn(async () => ({
    exitCode: 0,
    signal: null,
    timedOut: false,
  })),
);

vi.mock("hermes-paperclip-adapter/server", () => ({
  execute: hermesExecuteMock,
  testEnvironment: async () => ({
    adapterType: "hermes_local",
    status: "pass",
    checks: [],
    testedAt: new Date(0).toISOString(),
  }),
  sessionCodec: null,
  listSkills: async () => [],
  syncSkills: async () => ({ entries: [] }),
  detectModel: async () => null,
}));

import {
  detectAdapterModel,
  findActiveServerAdapter,
  findServerAdapter,
  listAdapterModels,
  registerServerAdapter,
  requireServerAdapter,
  unregisterServerAdapter,
} from "../adapters/index.js";
import { setOverridePaused } from "../adapters/registry.js";

const externalAdapter: ServerAdapterModule = {
  type: "external_test",
  execute: async () => ({
    exitCode: 0,
    signal: null,
    timedOut: false,
  }),
  testEnvironment: async () => ({
    adapterType: "external_test",
    status: "pass",
    checks: [],
    testedAt: new Date(0).toISOString(),
  }),
  models: [{ id: "external-model", label: "External Model" }],
  supportsLocalAgentJwt: false,
};

describe("server adapter registry", () => {
  beforeEach(() => {
    unregisterServerAdapter("external_test");
    unregisterServerAdapter("claude_local");
    setOverridePaused("claude_local", false);
  });

  afterEach(() => {
    unregisterServerAdapter("external_test");
    unregisterServerAdapter("claude_local");
    setOverridePaused("claude_local", false);
    hermesExecuteMock.mockClear();
  });

  it("registers external adapters and exposes them through lookup helpers", async () => {
    expect(findServerAdapter("external_test")).toBeNull();

    registerServerAdapter(externalAdapter);

    expect(requireServerAdapter("external_test")).toBe(externalAdapter);
    expect(await listAdapterModels("external_test")).toEqual([
      { id: "external-model", label: "External Model" },
    ]);
  });

  it("removes external adapters when unregistered", () => {
    registerServerAdapter(externalAdapter);

    unregisterServerAdapter("external_test");

    expect(findServerAdapter("external_test")).toBeNull();
    expect(() => requireServerAdapter("external_test")).toThrow(
      "Unknown adapter type: external_test",
    );
  });

  it("allows external plugin to override a built-in adapter type", () => {
    // claude_local is always built-in
    const builtIn = findServerAdapter("claude_local");
    expect(builtIn).not.toBeNull();

    const plugin: ServerAdapterModule = {
      type: "claude_local",
      execute: async () => ({
        exitCode: 0,
        signal: null,
        timedOut: false,
      }),
      testEnvironment: async () => ({
        adapterType: "claude_local",
        status: "pass",
        checks: [],
        testedAt: new Date(0).toISOString(),
      }),
      models: [{ id: "plugin-model", label: "Plugin Override" }],
      supportsLocalAgentJwt: false,
    };

    registerServerAdapter(plugin);

    // Plugin wins
    const resolved = requireServerAdapter("claude_local");
    expect(resolved).toBe(plugin);
    expect(resolved.models).toEqual([
      { id: "plugin-model", label: "Plugin Override" },
    ]);
  });

  it("exposes capability flags from registered adapters", () => {
    const adapterWithCaps: ServerAdapterModule = {
      type: "external_test",
      execute: async () => ({ exitCode: 0, signal: null, timedOut: false }),
      testEnvironment: async () => ({
        adapterType: "external_test",
        status: "pass" as const,
        checks: [],
        testedAt: new Date(0).toISOString(),
      }),
      supportsLocalAgentJwt: true,
      supportsInstructionsBundle: true,
      instructionsPathKey: "customPathKey",
      requiresMaterializedRuntimeSkills: true,
    };

    registerServerAdapter(adapterWithCaps);

    const resolved = findActiveServerAdapter("external_test");
    expect(resolved).not.toBeNull();
    expect(resolved!.supportsInstructionsBundle).toBe(true);
    expect(resolved!.instructionsPathKey).toBe("customPathKey");
    expect(resolved!.requiresMaterializedRuntimeSkills).toBe(true);
    expect(resolved!.supportsLocalAgentJwt).toBe(true);
  });

  it("returns undefined for capability flags on adapters that do not set them", () => {
    registerServerAdapter(externalAdapter);

    const resolved = findActiveServerAdapter("external_test");
    expect(resolved).not.toBeNull();
    expect(resolved!.supportsInstructionsBundle).toBeUndefined();
    expect(resolved!.instructionsPathKey).toBeUndefined();
    expect(resolved!.requiresMaterializedRuntimeSkills).toBeUndefined();
  });

  it("built-in claude_local adapter declares capability flags", () => {
    const adapter = findActiveServerAdapter("claude_local");
    expect(adapter).not.toBeNull();
    expect(adapter!.supportsInstructionsBundle).toBe(true);
    expect(adapter!.instructionsPathKey).toBe("instructionsFilePath");
    expect(adapter!.requiresMaterializedRuntimeSkills).toBe(false);
    expect(adapter!.supportsLocalAgentJwt).toBe(true);
  });

  it("switches active adapter behavior back to the builtin when an override is paused", async () => {
    const builtIn = findServerAdapter("claude_local");
    expect(builtIn).not.toBeNull();

    const detectModel = vi.fn(async () => ({
      model: "plugin-model",
      provider: "plugin-provider",
      source: "plugin-source",
    }));
    const plugin: ServerAdapterModule = {
      type: "claude_local",
      execute: async () => ({
        exitCode: 0,
        signal: null,
        timedOut: false,
      }),
      testEnvironment: async () => ({
        adapterType: "claude_local",
        status: "pass",
        checks: [],
        testedAt: new Date(0).toISOString(),
      }),
      models: [{ id: "plugin-model", label: "Plugin Override" }],
      detectModel,
      supportsLocalAgentJwt: false,
    };

    registerServerAdapter(plugin);

    expect(findActiveServerAdapter("claude_local")).toBe(plugin);
    expect(await listAdapterModels("claude_local")).toEqual([
      { id: "plugin-model", label: "Plugin Override" },
    ]);
    expect(await detectAdapterModel("claude_local")).toMatchObject({
      model: "plugin-model",
      provider: "plugin-provider",
    });

    expect(setOverridePaused("claude_local", true)).toBe(true);

    expect(findActiveServerAdapter("claude_local")).not.toBe(plugin);
    expect(await listAdapterModels("claude_local")).toEqual(builtIn?.models ?? []);
    expect(await detectAdapterModel("claude_local")).toBeNull();
    expect(detectModel).toHaveBeenCalledTimes(1);
  });

  it("injects the local agent JWT and Paperclip API auth guidance into Hermes", async () => {
    const adapter = requireServerAdapter("hermes_local");

    await adapter.execute({
      runId: "run-123",
      agent: {
        id: "agent-123",
        companyId: "company-123",
        name: "Hermes Agent",
        role: "engineer",
        adapterType: "hermes_local",
        adapterConfig: {
          env: {
            OPENAI_API_KEY: "llm-token",
          },
          promptTemplate: "Existing prompt",
        },
      },
      runtime: {},
      config: {},
      context: {},
      onLog: async () => {},
      onMeta: async () => {},
      onSpawn: async () => {},
      authToken: "agent-run-jwt",
    });

    expect(hermesExecuteMock).toHaveBeenCalledTimes(1);
    const [patchedCtx] = hermesExecuteMock.mock.calls[0];
    expect(patchedCtx.agent.adapterConfig).toMatchObject({
      env: {
        OPENAI_API_KEY: "llm-token",
        PAPERCLIP_API_KEY: "agent-run-jwt",
        PAPERCLIP_RUN_ID: "run-123",
      },
    });
    expect(patchedCtx.agent.adapterConfig.promptTemplate).toContain(
      "Authorization: Bearer $PAPERCLIP_API_KEY",
    );
    expect(patchedCtx.agent.adapterConfig.promptTemplate).toContain(
      "X-Paperclip-Run-Id: $PAPERCLIP_RUN_ID",
    );
    expect(patchedCtx.agent.adapterConfig.promptTemplate).toContain("Existing prompt");
  });

  it("preserves Hermes command normalization while injecting auth", async () => {
    const adapter = requireServerAdapter("hermes_local");

    await adapter.execute({
      runId: "run-123",
      agent: {
        id: "agent-123",
        companyId: "company-123",
        name: "Hermes Agent",
        role: "engineer",
        adapterType: "hermes_local",
        adapterConfig: {
          command: "agent-hermes",
        },
      },
      runtime: {},
      config: {
        command: "runtime-hermes",
      },
      context: {},
      onLog: async () => {},
      onMeta: async () => {},
      onSpawn: async () => {},
      authToken: "agent-run-jwt",
    });

    expect(hermesExecuteMock).toHaveBeenCalledTimes(1);
    const [patchedCtx] = hermesExecuteMock.mock.calls[0];
    expect(patchedCtx.config.hermesCommand).toBe("runtime-hermes");
    expect(patchedCtx.agent.adapterConfig.hermesCommand).toBe("agent-hermes");
    expect(patchedCtx.agent.adapterConfig.env.PAPERCLIP_API_KEY).toBe("agent-run-jwt");
  });

  it("passes the original Hermes context through when authToken is absent", async () => {
    const adapter = requireServerAdapter("hermes_local");
    const ctx = {
      runId: "run-123",
      agent: {
        id: "agent-123",
        companyId: "company-123",
        name: "Hermes Agent",
        role: "engineer",
        adapterType: "hermes_local",
        adapterConfig: {
          env: {
            PAPERCLIP_API_KEY: "server-level-key",
          },
          promptTemplate: "Existing prompt",
        },
      },
      runtime: {},
      config: {},
      context: {},
      onLog: async () => {},
      onMeta: async () => {},
      onSpawn: async () => {},
    };

    await adapter.execute(ctx);

    expect(hermesExecuteMock).toHaveBeenCalledTimes(1);
    expect(hermesExecuteMock).toHaveBeenCalledWith(ctx);
  });

  it("preserves an explicit Hermes Paperclip API key and does not set promptTemplate when none was configured", async () => {
    const adapter = requireServerAdapter("hermes_local");

    await adapter.execute({
      runId: "run-123",
      agent: {
        id: "agent-123",
        companyId: "company-123",
        name: "Hermes Agent",
        role: "engineer",
        adapterType: "hermes_local",
        adapterConfig: {
          env: {
            PAPERCLIP_API_KEY: "explicit-agent-key",
            PAPERCLIP_RUN_ID: "stale-run-id",
          },
        },
      },
      runtime: {},
      config: {},
      context: {},
      onLog: async () => {},
      onMeta: async () => {},
      onSpawn: async () => {},
      authToken: "agent-run-jwt",
    });

    const [patchedCtx] = hermesExecuteMock.mock.calls[0];
    expect(patchedCtx.agent.adapterConfig.env.PAPERCLIP_API_KEY).toBe("explicit-agent-key");
    expect(patchedCtx.agent.adapterConfig.env.PAPERCLIP_RUN_ID).toBe("run-123");
    // No custom promptTemplate was set — Hermes must use its built-in default.
    // Setting promptTemplate here would replace the full default with just the auth guard text,
    // stripping assigned issue / workflow instructions.
    expect(patchedCtx.agent.adapterConfig.promptTemplate).toBeUndefined();
  });

  it("does not set promptTemplate when no custom template is configured, preserving Hermes default", async () => {
    const adapter = requireServerAdapter("hermes_local");

    await adapter.execute({
      runId: "run-123",
      agent: {
        id: "agent-123",
        companyId: "company-123",
        name: "Hermes Agent",
        role: "engineer",
        adapterType: "hermes_local",
        adapterConfig: {},
      },
      runtime: {},
      config: {},
      context: {},
      onLog: async () => {},
      onMeta: async () => {},
      onSpawn: async () => {},
      authToken: "agent-run-jwt",
    });

    const [patchedCtx] = hermesExecuteMock.mock.calls[0];
    // promptTemplate must remain unset so Hermes uses its built-in heartbeat/task prompt.
    expect(patchedCtx.agent.adapterConfig.promptTemplate).toBeUndefined();
    // Auth token is still injected.
    expect(patchedCtx.agent.adapterConfig.env.PAPERCLIP_API_KEY).toBe("agent-run-jwt");
  });
});