// @vitest-environment happy-dom

import { readFileSync } from "node:fs";
import { resolve } from "node:path";
import { createApp, defineComponent, h, nextTick, type App } from "vue";
import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
import i18n from "@/i18n";

const { resolveSshPromptMock } = vi.hoisted(() => ({
  resolveSshPromptMock: vi.fn(),
}));

vi.mock("@/lib/backend/api", () => ({ resolveSshPrompt: resolveSshPromptMock }));
vi.mock("@/lib/backend/tauriRuntime", () => ({ isTauriRuntime: () => false }));
vi.mock("@/composables/useToast", () => ({ useToast: () => ({ toast: vi.fn() }) }));

vi.mock("@/components/ui/dialog", async () => {
  const { defineComponent, h, Teleport } = await import("vue");
  const passthrough = defineComponent({
    setup(_props, { slots }) {
      return () => h("div", slots.default?.());
    },
  });
  const dialog = defineComponent({
    props: { open: Boolean },
    setup(props, { slots }) {
      return () => (props.open ? h("div", slots.default?.()) : null);
    },
  });
  const dialogContent = defineComponent({
    props: {
      class: [String, Array, Object],
      overlayClass: [String, Array, Object],
      portalClass: [String, Array, Object],
    },
    inheritAttrs: false,
    setup(props, { slots }) {
      return () => h(Teleport, { to: "body" }, [h("div", { class: ["dialog-overlay", "z-50", props.overlayClass] }), h("div", { class: ["dialog-positioner", "z-50", props.portalClass] }, [h("div", { class: ["dialog-content", props.class] }, slots.default?.())])]);
    },
  });
  return {
    Dialog: dialog,
    DialogContent: dialogContent,
    DialogDescription: passthrough,
    DialogFooter: passthrough,
    DialogHeader: passthrough,
    DialogTitle: passthrough,
  };
});

vi.mock("@/components/ui/button", async () => {
  const { defineComponent, h } = await import("vue");
  return {
    Button: defineComponent({
      inheritAttrs: false,
      setup(_props, { attrs, slots }) {
        return () => h("button", attrs, slots.default?.());
      },
    }),
  };
});

import SshHostKeyPromptDialog from "@/components/ssh/SshHostKeyPromptDialog.vue";

const dialogSource = readFileSync(resolve(process.cwd(), "apps/desktop/src/components/ssh/SshHostKeyPromptDialog.vue"), "utf8");

class MockEventSource {
  static instances: MockEventSource[] = [];

  readonly url: string;
  onmessage: ((event: MessageEvent<string>) => void) | null = null;
  onopen: (() => void) | null = null;
  onerror: (() => void) | null = null;
  closed = false;

  constructor(url: string | URL) {
    this.url = String(url);
    MockEventSource.instances.push(this);
  }

  emit(data: unknown) {
    this.onmessage?.(new MessageEvent("message", { data: JSON.stringify(data) }));
  }

  open() {
    this.onopen?.();
  }

  error() {
    this.onerror?.();
  }

  close() {
    this.closed = true;
  }
}

const mountedApps: App[] = [];

beforeEach(() => {
  resolveSshPromptMock.mockReset().mockResolvedValue(undefined);
  MockEventSource.instances = [];
  vi.stubGlobal("EventSource", MockEventSource as unknown as typeof EventSource);
  vi.stubGlobal("fetch", vi.fn().mockResolvedValue({ ok: true, json: async () => [] } as Response));
  i18n.global.locale.value = "en";
});

afterEach(() => {
  for (const app of mountedApps.splice(0)) app.unmount();
  document.body.innerHTML = "";
  vi.unstubAllGlobals();
});

async function mountDialog() {
  const container = document.createElement("div");
  document.body.append(container);
  const app = createApp(
    defineComponent({
      setup() {
        return () => h(SshHostKeyPromptDialog);
      },
    }),
  );
  mountedApps.push(app);
  app.use(i18n);
  app.mount(container);
  await nextTick();
}

describe("SshHostKeyPromptDialog web bridge", () => {
  it("requires an explicit answer for blocking SSH prompts", () => {
    expect(dialogSource).toContain(':show-close-button="false"');
    expect(dialogSource).toContain("@interact-outside.prevent");
    expect(dialogSource).toContain("@escape-key-down.prevent");
    expect(dialogSource).not.toContain(':dismissible="false"');
  });

  it("keeps the prompt above a later body-mounted connection dialog and answerable", async () => {
    await mountDialog();

    const eventSource = MockEventSource.instances[0];
    eventSource?.emit({
      type: "prompt",
      request: {
        id: "prompt-layered",
        kind: "HostKeyVerify",
        host: "layered.example.test",
        port: 22,
        key_type: "ssh-ed25519",
        fingerprint: "SHA256:layered",
      },
    });
    await nextTick();

    // Simulate ConnectionDialog opening after the global prompt: its portal is
    // appended later and remains on the shared default z-50 layer.
    const connectionPositioner = document.createElement("div");
    connectionPositioner.className = "dialog-positioner z-50";
    connectionPositioner.textContent = "New connection";
    document.body.append(connectionPositioner);

    const promptPositioner = document.body.querySelector<HTMLElement>(".dialog-positioner.z-\\[200\\]");
    const promptOverlay = document.body.querySelector<HTMLElement>(".dialog-overlay.z-\\[200\\]");
    expect(promptPositioner).not.toBeNull();
    expect(promptOverlay).not.toBeNull();
    expect(connectionPositioner.classList.contains("z-50")).toBe(true);
    expect(promptPositioner?.classList.contains("z-[200]")).toBe(true);
    expect(promptOverlay?.classList.contains("z-[200]")).toBe(true);
    expect(document.body.textContent).toContain("layered.example.test:22");

    const buttons = document.body.querySelectorAll<HTMLButtonElement>("button");
    buttons.item(buttons.length - 1).click();
    await vi.waitFor(() => {
      expect(resolveSshPromptMock).toHaveBeenCalledWith({
        id: "prompt-layered",
        action: "accept",
        remember: true,
        secret: undefined,
      });
    });
  });

  it("shows an SSE host-key prompt and posts the user's acceptance", async () => {
    await mountDialog();

    const eventSource = MockEventSource.instances[0];
    expect(eventSource?.url).toBe("/api/ssh/prompts");

    eventSource?.emit({
      type: "prompt",
      request: {
        id: "prompt-1",
        kind: "HostKeyVerify",
        host: "ssh.example.test",
        port: 22,
        key_type: "ssh-ed25519",
        fingerprint: "SHA256:test-fingerprint",
      },
    });
    await nextTick();

    expect(document.body.textContent).toContain("ssh.example.test:22");
    expect(document.body.textContent).toContain("SHA256:test-fingerprint");

    const buttons = document.body.querySelectorAll<HTMLButtonElement>("button");
    buttons.item(buttons.length - 1).click();

    await vi.waitFor(() => {
      expect(resolveSshPromptMock).toHaveBeenCalledWith({
        id: "prompt-1",
        action: "accept",
        remember: true,
        secret: undefined,
      });
    });
  });

  it("shows a changed host-key prompt and updates the saved fingerprint", async () => {
    await mountDialog();

    const eventSource = MockEventSource.instances[0];
    eventSource?.emit({
      type: "prompt",
      request: {
        id: "changed-1",
        kind: "HostKeyChanged",
        host: "192.168.1.111",
        port: 22,
        key_type: "ssh-ed25519",
        fingerprint: "SHA256:new-fingerprint",
        previous_fingerprint: "SHA256:old-fingerprint",
      },
    });
    await nextTick();

    expect(document.body.textContent).toContain("Host fingerprint has changed");
    expect(document.body.textContent).toContain("new-fingerprint");
    expect(document.body.textContent).toContain("old-fingerprint");
    expect(document.body.textContent).toContain("Saved fingerprint");

    const buttons = [...document.body.querySelectorAll("button")].map((button) => button.textContent?.trim());
    expect(buttons).toContain("Close");
    expect(buttons).toContain("Continue");
    expect(buttons).toContain("Update and Continue");

    const update = [...document.body.querySelectorAll<HTMLButtonElement>("button")].find((button) => button.textContent?.trim() === "Update and Continue");
    update?.click();

    await vi.waitFor(() => {
      expect(resolveSshPromptMock).toHaveBeenCalledWith({
        id: "changed-1",
        action: "accept",
        remember: true,
        secret: undefined,
      });
    });
  });

  it("continues a changed host key for this session only", async () => {
    await mountDialog();

    MockEventSource.instances[0]?.emit({
      type: "prompt",
      request: {
        id: "changed-2",
        kind: "HostKeyChanged",
        host: "board.example.test",
        port: 22,
        key_type: "ssh-ed25519",
        fingerprint: "SHA256:new",
        previous_fingerprint: "SHA256:old",
      },
    });
    await nextTick();

    const cont = [...document.body.querySelectorAll<HTMLButtonElement>("button")].find((button) => button.textContent?.trim() === "Continue");
    cont?.click();

    await vi.waitFor(() => {
      expect(resolveSshPromptMock).toHaveBeenCalledWith({
        id: "changed-2",
        action: "accept",
        remember: false,
        secret: undefined,
      });
    });
  });

  it("clears prompts that are no longer pending after an SSE reconnect snapshot", async () => {
    await mountDialog();

    const eventSource = MockEventSource.instances[0];
    eventSource?.emit({
      type: "prompt",
      request: {
        id: "prompt-2",
        kind: "HostKeyVerify",
        host: "stale.example.test",
        port: 22,
        key_type: "ssh-ed25519",
        fingerprint: "SHA256:stale",
      },
    });
    await nextTick();
    expect(document.body.textContent).toContain("stale.example.test:22");

    eventSource?.emit({ type: "sync", pendingIds: [] });
    await nextTick();
    expect(document.body.textContent).not.toContain("stale.example.test:22");
  });

  it("recovers a pending host-key prompt via the polling fallback when the SSE event is missed", async () => {
    // Simulate a prompt that fired before the EventSource was open: the backend
    // has it pending, but the SSE `Prompt` event never reached the dialog. The
    // polling fallback must surface it so the user can still confirm.
    const fetchMock = vi.mocked(fetch);
    fetchMock.mockResolvedValueOnce({
      ok: true,
      json: async () => [
        {
          id: "prompt-3",
          kind: "HostKeyVerify",
          host: "first.example.test",
          port: 22,
          key_type: "ssh-ed25519",
          fingerprint: "SHA256:first",
        },
      ],
    } as Response);

    await mountDialog();
    await nextTick();

    await vi.waitFor(() => {
      expect(document.body.textContent).toContain("first.example.test:22");
    });
    expect(fetchMock).toHaveBeenCalledWith("/api/ssh/prompts/pending", { credentials: "include" });
  });

  it("stops polling once the SSE stream opens and resumes it after an error", async () => {
    const setSpy = vi.spyOn(globalThis, "setInterval");
    const clearSpy = vi.spyOn(globalThis, "clearInterval");

    await mountDialog();
    const eventSource = MockEventSource.instances[0];

    // Polling is armed on mount (first-connect fallback).
    expect(setSpy).toHaveBeenCalled();

    // Opening the stream stops the poller (SSE replay now covers lost prompts).
    eventSource?.open();
    expect(clearSpy).toHaveBeenCalled();

    // A disconnect re-arms polling so prompts are not lost during the outage.
    eventSource?.error();
    expect(setSpy).toHaveBeenCalledTimes(2);
  });

  it("shows worker-upload consent buttons and wraps the digest and path", async () => {
    await mountDialog();

    const eventSource = MockEventSource.instances[0];
    eventSource?.emit({
      type: "prompt",
      request: {
        id: "worker-1",
        kind: "WorkerUploadConsent",
        host: "203.0.113.10",
        port: 22,
        fingerprint: "08ca4746e8fbf97038a93105d3ef023112e3f66bc097869401628c00acea7709",
        prompt: "/home/testuser/.cache/dbx/sqlite-worker/session-ebd207de-8f26cd6e-08ca4746e8fbf97038a93105d3ef023112e3f66bc097869401628c00acea7709",
      },
    });
    await nextTick();

    expect(document.body.textContent).toContain("203.0.113.10:22");
    expect(document.body.textContent).toContain("08ca4746e8fbf97038a93105d3ef023112e3f66bc097869401628c00acea7709");
    expect(document.body.textContent).toContain("/home/testuser/.cache/dbx/sqlite-worker/");
    expect(dialogSource).toContain("break-all");
    expect(dialogSource).toContain("shrink-0");

    const buttons = [...document.body.querySelectorAll("button")].map((button) => button.textContent?.trim());
    expect(buttons).toContain("Cancel");
    expect(buttons).toContain("Upload");
  });

  it("submits a keyboard-interactive TOTP challenge as a secret response", async () => {
    await mountDialog();

    const eventSource = MockEventSource.instances[0];
    eventSource?.emit({
      type: "prompt",
      request: {
        id: "totp-1",
        kind: "SecretInput",
        host: "jump.example.test",
        port: 2222,
        prompt: "JumpServer\n\nOTP Code:",
        echo: false,
      },
    });
    await nextTick();

    expect(document.body.textContent).toContain("SSH Verification Required");
    expect(document.body.textContent).toContain("OTP Code:");

    const input = document.body.querySelector<HTMLInputElement>("input");
    expect(input?.type).toBe("password");
    if (!input) throw new Error("TOTP input was not rendered");
    input.value = "123456";
    input.dispatchEvent(new Event("input", { bubbles: true }));
    await nextTick();

    const buttons = document.body.querySelectorAll<HTMLButtonElement>("button");
    buttons.item(buttons.length - 1).click();

    await vi.waitFor(() => {
      expect(resolveSshPromptMock).toHaveBeenCalledWith({
        id: "totp-1",
        action: "secret",
        remember: undefined,
        secret: "123456",
      });
    });
  });

  it("relays a plugin question and submits the typed answer", async () => {
    // Host API `host/requestUserInput`: a plugin backend (e.g. the SSH plugin
    // answering a bastion's keyboard-interactive MFA) asks through the same
    // dialog, and the host only carries the question and the typed value.
    await mountDialog();

    const eventSource = MockEventSource.instances[0];
    eventSource?.emit({
      type: "prompt",
      request: {
        id: "plugin-input-1",
        kind: "UserInput",
        host: "",
        port: 0,
        prompt: "Verification code (6 digits)",
        title: "JumpServer login",
        source: "SSH Terminal",
        echo: false,
        default_value: "12",
      },
    });
    await nextTick();

    expect(document.body.textContent).toContain("JumpServer login");
    expect(document.body.textContent).toContain("SSH Terminal needs input before it can continue.");
    expect(document.body.textContent).toContain("Verification code (6 digits)");

    const input = document.body.querySelector<HTMLInputElement>("input");
    expect(input?.type).toBe("password");
    // A caller-provided default is offered but still has to be submitted.
    expect(input?.value).toBe("12");
    if (!input) throw new Error("plugin prompt input was not rendered");
    input.value = "654321";
    input.dispatchEvent(new Event("input", { bubbles: true }));
    await nextTick();

    const buttons = [...document.body.querySelectorAll<HTMLButtonElement>("button")];
    expect(buttons.map((button) => button.textContent?.trim())).toEqual(["Cancel", "Submit"]);
    buttons[buttons.length - 1].click();

    await vi.waitFor(() => {
      expect(resolveSshPromptMock).toHaveBeenCalledWith({
        id: "plugin-input-1",
        action: "secret",
        remember: undefined,
        secret: "654321",
      });
    });
  });

  it("answers a fixed-choice plugin question by picking an option", async () => {
    await mountDialog();

    const eventSource = MockEventSource.instances[0];
    eventSource?.emit({
      type: "prompt",
      request: {
        id: "plugin-choice-1",
        kind: "UserInput",
        host: "",
        port: 0,
        title: "Select account",
        prompt: "Which bastion account should be used?",
        source: "LDAP Directory",
        options: [
          { value: "jinpy", label: "jinpy (admin)" },
          { value: "deploy", label: "deploy (read-only)" },
        ],
      },
    });
    await nextTick();

    expect(document.body.textContent).toContain("Which bastion account should be used?");
    const buttons = [...document.body.querySelectorAll<HTMLButtonElement>("button")];
    // Options replace the free-form input, so only the choices plus Cancel show.
    expect(buttons.map((button) => button.textContent?.trim())).toEqual(["jinpy (admin)", "deploy (read-only)", "Cancel"]);
    expect(document.body.querySelector("input")).toBeNull();

    buttons.find((button) => button.textContent?.trim() === "deploy (read-only)")?.click();
    await vi.waitFor(() => {
      expect(resolveSshPromptMock).toHaveBeenCalledWith({
        id: "plugin-choice-1",
        action: "secret",
        remember: undefined,
        secret: "deploy",
      });
    });
  });

  it("cancels a plugin question without answering it", async () => {
    await mountDialog();

    const eventSource = MockEventSource.instances[0];
    eventSource?.emit({
      type: "prompt",
      request: {
        id: "plugin-input-cancel",
        kind: "UserInput",
        host: "",
        port: 0,
        prompt: "Verification code",
        source: "SSH Terminal",
      },
    });
    await nextTick();

    const cancel = [...document.body.querySelectorAll<HTMLButtonElement>("button")].find((button) => button.textContent?.trim() === "Cancel");
    cancel?.click();
    await vi.waitFor(() => {
      expect(resolveSshPromptMock).toHaveBeenCalledWith({
        id: "plugin-input-cancel",
        action: "reject",
        remember: undefined,
        secret: undefined,
      });
    });
  });
});