import { mkdir, mkdtemp, rm, writeFile } from "node:fs/promises";
import { tmpdir } from "node:os";
import path from "node:path";
import {
  ANONYMOUS_PRINCIPAL,
  createAuthenticatedPrincipal,
  type EkklesiaPrincipal,
  type ModuleDatabase,
  type ModuleRuntimeServices,
  parseEkklesiaUserId,
} from "@ekklesia/contracts";
import {
  type AuthorizationStore,
  createAuthorizationEvaluator,
} from "@ekklesia/core/authorization";
import type { DashboardConfiguration } from "@ekklesia/core/dashboard";
import type { EkklesiaIdentityRuntime } from "@ekklesia/core/identity";
import {
  composePlatformPermissionRegistry,
  createModuleUiPublicationRegistry,
  discoverModules,
  EMPTY_MODULE_REALTIME_REGISTRY,
} from "@ekklesia/core/modules";
import type { Hono } from "hono";
import { afterEach, describe, expect, it, vi } from "vitest";
import { createApiApp } from "../src/app.js";
import { DASHBOARD_NAVIGATION_PATH } from "../src/dashboard-routes.js";
import { MODULE_UI_INVENTORY_PATH } from "../src/module-ui-inventory.js";
import { createInMemoryDashboardStore } from "./support/in-memory-dashboard-store.js";
import {
  createInMemoryModuleLifecycleStore,
  moduleLifecycleSnapshotFor,
} from "./support/in-memory-module-lifecycle.js";
import { moduleConfigurationOptionFor } from "./support/in-memory-module-configuration.js";
import { moduleStorageOptionFor } from "./support/in-memory-module-storage.js";

const trustedOrigin = "https://dashboard.example.test";
const untrustedOrigin = "https://evil.example.test";
const viewerId = parseEkklesiaUserId("33333333-3333-4333-8333-333333333333");

const temporaryDirectories: string[] = [];

afterEach(async () => {
  await Promise.all(
    temporaryDirectories
      .splice(0)
      .map((directory) => rm(directory, { force: true, recursive: true })),
  );
});

interface ModuleFixture {
  readonly id: string;
  readonly name: string;
  readonly withUi?: boolean;
}

async function createModule(modulesDirectory: string, fixture: ModuleFixture): Promise<void> {
  const moduleDirectory = path.join(modulesDirectory, fixture.id);
  await mkdir(path.join(moduleDirectory, "dist/server"), { recursive: true });
  await writeFile(
    path.join(moduleDirectory, "package.json"),
    JSON.stringify({
      ekklesia: { layer: "module" },
      name: `@test/module-${fixture.id}`,
      type: "module",
      version: "1.0.0",
    }),
  );
  await writeFile(
    path.join(moduleDirectory, "ekklesia.module.json"),
    JSON.stringify({
      compatibility: { moduleSdk: "^0.1.0", platform: "^0.1.0" },
      entrypoints: {
        server: "./dist/server/index.js",
        ...(fixture.withUi === false ? {} : { ui: "./dist/ui/index.js" }),
      },
      id: fixture.id,
      manifestVersion: 6,
      name: fixture.name,
      version: "1.0.0",
    }),
  );
  await writeFile(
    path.join(moduleDirectory, "dist/server/index.js"),
    `export default { id: ${JSON.stringify(fixture.id)}, version: "1.0.0" };`,
  );
  if (fixture.withUi !== false) {
    await mkdir(path.join(moduleDirectory, "dist/ui"), { recursive: true });
    await writeFile(
      path.join(moduleDirectory, "dist/ui/index.js"),
      `export default { id: ${JSON.stringify(fixture.id)}, version: "1.0.0", mount() {} };\n`,
    );
  }
}

interface InstallOptions {
  readonly fixtures?: readonly ModuleFixture[];
  readonly principal?: EkklesiaPrincipal;
  readonly platformOwner?: boolean;
  readonly configuration?: Partial<DashboardConfiguration>;
}

const defaultFixtures: readonly ModuleFixture[] = [
  { id: "video", name: "Video" },
  { id: "livestream", name: "Livestream" },
  { id: "calendar", name: "Calendar" },
];

async function install(options: InstallOptions = {}): Promise<{ app: Hono }> {
  const modulesDirectory = await mkdtemp(path.join(tmpdir(), "ekklesia-dashboard-routes-"));
  temporaryDirectories.push(modulesDirectory);
  for (const fixture of options.fixtures ?? defaultFixtures) {
    await createModule(modulesDirectory, fixture);
  }
  const modules = await discoverModules({
    moduleSdkVersion: "0.1.0",
    modulesDirectory,
    platformVersion: "0.1.0",
  });

  const evaluator = createAuthorizationEvaluator({
    grants: { hasActiveGrant: async () => false },
    platformOwners: { isPlatformOwner: async () => options.platformOwner === true },
  });
  const runtime: EkklesiaIdentityRuntime = {
    handleAuthRequest: vi.fn().mockResolvedValue(new Response(null, { status: 200 })),
    resolvePrincipal: vi.fn().mockResolvedValue(options.principal ?? ANONYMOUS_PRINCIPAL),
  };
  const store = {
    createGrant: vi.fn(),
    grantPlatformOwner: vi.fn(),
    hasActiveGrant: vi.fn().mockResolvedValue(false),
    isPlatformOwner: vi.fn().mockResolvedValue(false),
    listGrantsForUser: vi.fn().mockResolvedValue({ grants: [] }),
    revokeGrant: vi.fn(),
    revokePlatformOwner: vi.fn(),
  } as unknown as AuthorizationStore;

  const app = createApiApp({
    authorization: { evaluator, registry: composePlatformPermissionRegistry(modules), store },
    dashboard: createInMemoryDashboardStore(options.configuration ?? {}),
    moduleRoutes: Object.freeze([]),
    moduleRealtime: EMPTY_MODULE_REALTIME_REGISTRY,
    moduleServices: Object.freeze({
      database: Object.freeze({}) as unknown as ModuleDatabase,
    }) as ModuleRuntimeServices,
    moduleUi: createModuleUiPublicationRegistry(modules),
    moduleLifecycle: {
      snapshot: moduleLifecycleSnapshotFor(modules),
      store: createInMemoryModuleLifecycleStore(),
    },
    moduleConfiguration: moduleConfigurationOptionFor(modules),
    moduleStorage: moduleStorageOptionFor(modules),
    runtime,
    trustedOrigins: [trustedOrigin],
  });

  return { app };
}

function signedIn(): EkklesiaPrincipal {
  return createAuthenticatedPrincipal(viewerId);
}

interface NavigationEntry {
  readonly name: string;
  readonly module: {
    readonly id: string;
    readonly version: string;
    readonly ui: { readonly url: string };
    readonly api: { readonly baseUrl: string };
    readonly permissions: readonly string[];
  };
}

interface NavigationBody {
  readonly groups: ReadonlyArray<{
    readonly id: string;
    readonly label: string;
    readonly order: number;
    readonly modules: readonly NavigationEntry[];
  }>;
  readonly ungrouped: readonly NavigationEntry[];
}

async function navigationOf(app: Hono): Promise<NavigationBody> {
  const response = await app.request(DASHBOARD_NAVIGATION_PATH);
  expect(response.status).toBe(200);
  return (await response.json()) as NavigationBody;
}

/** An administrator: a platform owner, who passes the evaluator's owner bypass for the restricted
 * manage permission exactly as in production. */
async function administrator(configuration: Partial<DashboardConfiguration> = {}) {
  return install({ configuration, platformOwner: true, principal: signedIn() });
}

function mutate(app: Hono, method: "PUT" | "DELETE", url: string, body?: unknown) {
  return app.request(url, {
    ...(body === undefined
      ? {}
      : { body: JSON.stringify(body), headers: { "content-type": "application/json" } }),
    headers: {
      origin: trustedOrigin,
      ...(body === undefined ? {} : { "content-type": "application/json" }),
    },
    method,
  });
}

describe("Dashboard navigation — reading", () => {
  it("shows every mountable module as ungrouped when nothing is configured", async () => {
    const { app } = await install({ principal: signedIn() });

    const navigation = await navigationOf(app);

    expect(navigation.groups).toEqual([]);
    // A fresh installation is immediately usable: no initialization write, no manual database edit.
    expect(navigation.ungrouped.map((entry) => entry.name)).toEqual([
      "Calendar",
      "Livestream",
      "Video",
    ]);
  });

  it("renders the module's own manifest name, never its id", async () => {
    const { app } = await install({ principal: signedIn() });

    const navigation = await navigationOf(app);

    expect(navigation.ungrouped.map((entry) => entry.name)).not.toContain("livestream");
    expect(navigation.ungrouped.find((entry) => entry.module.id === "livestream")?.name).toBe(
      "Livestream",
    );
  });

  it("groups and orders exactly as the stored configuration says", async () => {
    const { app } = await install({
      configuration: {
        groups: [
          { id: "planning", label: "Planning", sortOrder: 20 },
          { id: "media", label: "Media", sortOrder: 10 },
        ],
        placements: [
          { groupId: "media", moduleId: "livestream", sortOrder: 20 },
          { groupId: "media", moduleId: "video", sortOrder: 10 },
          { groupId: "planning", moduleId: "calendar", sortOrder: 10 },
        ],
      },
      principal: signedIn(),
    });

    const navigation = await navigationOf(app);

    expect(
      navigation.groups.map((group) => [group.label, group.modules.map((entry) => entry.name)]),
    ).toEqual([
      ["Media", ["Video", "Livestream"]],
      ["Planning", ["Calendar"]],
    ]);
    expect(navigation.ungrouped).toEqual([]);
  });

  it("embeds the generic mount descriptor unchanged inside each entry", async () => {
    const { app } = await install({ principal: signedIn() });

    const navigation = await navigationOf(app);
    const livestream = navigation.ungrouped.find((entry) => entry.module.id === "livestream");

    // Presentation wraps the host-neutral descriptor; it never rewrites it.
    expect(livestream?.module).toEqual({
      api: { baseUrl: "/api/v1/modules/livestream" },
      id: "livestream",
      permissions: [],
      realtime: { baseUrl: "/api/v1/module-realtime/livestream" },
      ui: { url: "/api/v1/module-ui/livestream/1.0.0" },
      version: "1.0.0",
    });
    expect(Object.keys(livestream ?? {}).sort()).toEqual(["module", "name"]);
  });

  it("agrees exactly with the generic inventory about what is mountable", async () => {
    const { app } = await install({
      configuration: {
        groups: [{ id: "media", label: "Media", sortOrder: 10 }],
        placements: [{ groupId: "media", moduleId: "video", sortOrder: 10 }],
      },
      principal: signedIn(),
    });

    const navigation = await navigationOf(app);
    const inventory = (await (await app.request(MODULE_UI_INVENTORY_PATH)).json()) as {
      modules: ReadonlyArray<{ id: string }>;
    };

    const navigationModules = [
      ...navigation.groups.flatMap((group) => group.modules),
      ...navigation.ungrouped,
    ].map((entry) => entry.module);
    // Both derive from one publication registry through one shared description, so they cannot
    // disagree about what exists or about any URL.
    expect(navigationModules.map((module) => module.id).sort()).toEqual(
      inventory.modules.map((module) => module.id).sort(),
    );
  });

  it("keeps the generic inventory free of presentation metadata", async () => {
    const { app } = await install({ principal: signedIn() });

    const body = await (await app.request(MODULE_UI_INVENTORY_PATH)).text();

    // The host-neutral contract a standalone host consumes must not learn Ekklesia has folders or
    // display names. That layering is the whole reason navigation is a separate route.
    for (const field of ["name", "label", "group", "order", "ungrouped"]) {
      expect(body, field).not.toContain(`"${field}"`);
    }
  });

  it("omits a module that is no longer installed, without breaking navigation", async () => {
    const { app } = await install({
      configuration: {
        groups: [{ id: "media", label: "Media", sortOrder: 10 }],
        placements: [
          { groupId: "media", moduleId: "video", sortOrder: 10 },
          { groupId: "media", moduleId: "removed-module", sortOrder: 20 },
        ],
      },
      fixtures: [{ id: "video", name: "Video" }],
      principal: signedIn(),
    });

    const navigation = await navigationOf(app);

    expect(navigation.groups[0]?.modules.map((entry) => entry.module.id)).toEqual(["video"]);
    expect(JSON.stringify(navigation)).not.toContain("removed-module");
  });

  it("keeps a newly installed module visible alongside an existing arrangement", async () => {
    const { app } = await install({
      configuration: {
        groups: [{ id: "media", label: "Media", sortOrder: 10 }],
        placements: [{ groupId: "media", moduleId: "video", sortOrder: 10 }],
      },
      principal: signedIn(),
    });

    const navigation = await navigationOf(app);

    expect(navigation.groups[0]?.modules.map((entry) => entry.name)).toEqual(["Video"]);
    // Calendar and Livestream were never configured and are still reachable.
    expect(navigation.ungrouped.map((entry) => entry.name)).toEqual(["Calendar", "Livestream"]);
  });

  it("excludes a module that ships no UI, exactly like the inventory does", async () => {
    const { app } = await install({
      fixtures: [
        { id: "video", name: "Video" },
        { id: "roster", name: "Roster", withUi: false },
      ],
      principal: signedIn(),
    });

    const navigation = await navigationOf(app);

    expect(JSON.stringify(navigation)).not.toContain("Roster");
  });

  it("leaks no filesystem path, package root, or manifest internal", async () => {
    const { app } = await install({ principal: signedIn() });

    const body = await (await app.request(DASHBOARD_NAVIGATION_PATH)).text();

    expect(body).not.toContain(tmpdir());
    expect(body).not.toContain("dist");
    expect(body).not.toContain("@test/module-");
    expect(body).not.toContain("ekklesia.module.json");
    expect(body).not.toContain("entrypoints");
    expect(body).not.toContain("manifestVersion");
  });

  it("is per-principal, uncached, and refused to anonymous callers", async () => {
    const { app: anonymous } = await install();
    const { app } = await install({ principal: signedIn() });

    const denied = await anonymous.request(DASHBOARD_NAVIGATION_PATH);
    const allowed = await app.request(DASHBOARD_NAVIGATION_PATH, {
      headers: { origin: trustedOrigin },
    });

    expect(denied.status).toBe(403);
    expect(await denied.text()).not.toContain("Livestream");
    expect(allowed.headers.get("cache-control")).toBe("no-store");
    const vary = allowed.headers.get("vary")?.toLowerCase() ?? "";
    expect(vary).toContain("origin");
    expect(vary).toContain("cookie");
  });
});

describe("Dashboard navigation — organizing", () => {
  it("creates a group and places a module, and both persist into the resolved view", async () => {
    const { app } = await administrator();

    expect(
      (
        await mutate(app, "PUT", `${DASHBOARD_NAVIGATION_PATH}/groups/media`, {
          label: "Media",
          order: 10,
        })
      ).status,
    ).toBe(200);
    expect(
      (
        await mutate(app, "PUT", `${DASHBOARD_NAVIGATION_PATH}/placements/livestream`, {
          groupId: "media",
          order: 10,
        })
      ).status,
    ).toBe(200);

    const navigation = await navigationOf(app);

    expect(navigation.groups.map((group) => group.label)).toEqual(["Media"]);
    expect(navigation.groups[0]?.modules.map((entry) => entry.name)).toEqual(["Livestream"]);
    expect(navigation.ungrouped.map((entry) => entry.name)).toEqual(["Calendar", "Video"]);
  });

  it("renames a group without moving anything", async () => {
    const { app } = await administrator({
      groups: [{ id: "media", label: "Media", sortOrder: 10 }],
      placements: [{ groupId: "media", moduleId: "livestream", sortOrder: 10 }],
    });

    await mutate(app, "PUT", `${DASHBOARD_NAVIGATION_PATH}/groups/media`, {
      label: "Sunday Production",
      order: 10,
    });
    const navigation = await navigationOf(app);

    expect(navigation.groups[0]).toMatchObject({ id: "media", label: "Sunday Production" });
    expect(navigation.groups[0]?.modules.map((entry) => entry.name)).toEqual(["Livestream"]);
  });

  it("moves a module between groups and changes only its placement", async () => {
    const { app } = await administrator({
      groups: [
        { id: "media", label: "Media", sortOrder: 10 },
        { id: "sunday-production", label: "Sunday Production", sortOrder: 5 },
      ],
      placements: [
        { groupId: "media", moduleId: "livestream", sortOrder: 10 },
        { groupId: "media", moduleId: "video", sortOrder: 20 },
      ],
    });
    const before = await navigationOf(app);
    const livestreamBefore = before.groups
      .flatMap((group) => group.modules)
      .find((entry) => entry.module.id === "livestream");

    await mutate(app, "PUT", `${DASHBOARD_NAVIGATION_PATH}/placements/livestream`, {
      groupId: "sunday-production",
      order: 10,
    });
    const after = await navigationOf(app);
    const livestreamAfter = after.groups
      .flatMap((group) => group.modules)
      .find((entry) => entry.module.id === "livestream");

    // The one property this whole pass exists to guarantee: the module — its artifact URL, its API
    // root, its permissions, its version, its name — is byte-identical across the move.
    expect(livestreamAfter).toEqual(livestreamBefore);
    expect(
      after.groups.find((group) => group.id === "sunday-production")?.modules.map((e) => e.name),
    ).toEqual(["Livestream"]);
    expect(after.groups.find((group) => group.id === "media")?.modules.map((e) => e.name)).toEqual([
      "Video",
    ]);
  });

  it("ungroups a module deliberately", async () => {
    const { app } = await administrator({
      groups: [{ id: "media", label: "Media", sortOrder: 10 }],
      placements: [{ groupId: "media", moduleId: "video", sortOrder: 10 }],
    });

    await mutate(app, "PUT", `${DASHBOARD_NAVIGATION_PATH}/placements/video`, {
      groupId: null,
      order: 5,
    });
    const navigation = await navigationOf(app);

    expect(navigation.groups[0]?.modules).toEqual([]);
    expect(navigation.ungrouped.map((entry) => entry.name)).toEqual([
      "Video",
      "Calendar",
      "Livestream",
    ]);
  });

  it("ungroups a deleted group's modules rather than losing them", async () => {
    const { app } = await administrator({
      groups: [{ id: "media", label: "Media", sortOrder: 10 }],
      placements: [{ groupId: "media", moduleId: "video", sortOrder: 10 }],
    });

    const deleted = await mutate(app, "DELETE", `${DASHBOARD_NAVIGATION_PATH}/groups/media`);
    const navigation = await navigationOf(app);

    expect(deleted.status).toBe(204);
    expect(navigation.groups).toEqual([]);
    expect(navigation.ungrouped.map((entry) => entry.name)).toEqual([
      "Video",
      "Calendar",
      "Livestream",
    ]);
  });

  it("refuses a placement naming a group that does not exist", async () => {
    const { app } = await administrator();

    const response = await mutate(app, "PUT", `${DASHBOARD_NAVIGATION_PATH}/placements/video`, {
      groupId: "not-a-group",
      order: 10,
    });

    expect(response.status).toBe(404);
    expect(await response.json()).toEqual({ code: "DASHBOARD_GROUP_NOT_FOUND" });
  });

  it("refuses a body carrying anything beyond the declared fields", async () => {
    const { app } = await administrator();

    const bodies: readonly unknown[] = [
      { label: "Media", order: 10, parentGroupId: "root" },
      { label: "Media", order: 10, ownerModuleId: "video" },
      { label: "Media" },
      { label: "", order: 10 },
      { label: "Media", order: -1 },
      { label: "Media", order: 1.5 },
      { label: 42, order: 10 },
      [],
      null,
    ];
    for (const body of bodies) {
      const response = await mutate(app, "PUT", `${DASHBOARD_NAVIGATION_PATH}/groups/media`, body);
      expect(response.status, JSON.stringify(body)).toBe(400);
      expect(await response.json(), JSON.stringify(body)).toEqual({ code: "INVALID_REQUEST" });
    }
  });

  it("refuses a malformed group identifier in the path", async () => {
    const { app } = await administrator();

    const response = await mutate(app, "PUT", `${DASHBOARD_NAVIGATION_PATH}/groups/Not%20Valid`, {
      label: "Media",
      order: 10,
    });

    expect(response.status).toBe(400);
  });
});

describe("Dashboard navigation — authority", () => {
  it("refuses organizing to a signed-in user without the manage permission", async () => {
    // Reading works for any signed-in user; organizing does not.
    const { app } = await install({ principal: signedIn() });

    expect((await app.request(DASHBOARD_NAVIGATION_PATH)).status).toBe(200);
    const response = await mutate(app, "PUT", `${DASHBOARD_NAVIGATION_PATH}/groups/media`, {
      label: "Media",
      order: 10,
    });

    expect(response.status).toBe(403);
    expect(await response.json()).toEqual({ code: "AUTHORIZATION_DENIED" });
  });

  it("refuses organizing from an untrusted origin, before authorization even runs", async () => {
    const { app } = await administrator();

    const response = await app.request(`${DASHBOARD_NAVIGATION_PATH}/groups/media`, {
      body: JSON.stringify({ label: "Media", order: 10 }),
      headers: { "content-type": "application/json", origin: untrustedOrigin },
      method: "PUT",
    });

    expect(response.status).toBe(403);
    expect(await response.json()).toEqual({ code: "UNTRUSTED_ORIGIN" });
  });

  it("refuses organizing to an anonymous caller", async () => {
    const { app } = await install();

    for (const [method, url, body] of [
      ["PUT", `${DASHBOARD_NAVIGATION_PATH}/groups/media`, { label: "Media", order: 10 }],
      ["DELETE", `${DASHBOARD_NAVIGATION_PATH}/groups/media`, undefined],
      ["PUT", `${DASHBOARD_NAVIGATION_PATH}/placements/video`, { groupId: null, order: 0 }],
    ] as const) {
      const response = await mutate(app, method, url, body);
      expect(response.status, `${method} ${url}`).toBe(403);
    }
  });

  it("grants no module authority to an administrator who reorganizes the Dashboard", async () => {
    // The platform owner holds `core.dashboard.navigation.manage` through the owner bypass. That
    // says nothing about any module: the hints in the navigation view are still evaluated per
    // module permission, and every module route stays enforced on its own.
    const { app } = await administrator();

    await mutate(app, "PUT", `${DASHBOARD_NAVIGATION_PATH}/groups/media`, {
      label: "Media",
      order: 10,
    });
    await mutate(app, "PUT", `${DASHBOARD_NAVIGATION_PATH}/placements/livestream`, {
      groupId: "media",
      order: 10,
    });
    const navigation = await navigationOf(app);

    const livestream = navigation.groups[0]?.modules[0];
    // The fixture modules declare no permissions at all, so an owner still holds none for them:
    // moving a module into a folder cannot manufacture a permission hint, let alone a grant.
    expect(livestream?.module.permissions).toEqual([]);
  });

  it("routes no method the navigation contract does not define", async () => {
    const { app } = await administrator();

    for (const method of ["POST", "PATCH"] as const) {
      const response = await app.request(DASHBOARD_NAVIGATION_PATH, {
        headers: { origin: trustedOrigin },
        method,
      });
      expect(response.status, method).toBe(404);
    }
  });
});