import { readFile } from "node:fs/promises";
import path from "node:path";
import { fileURLToPath } from "node:url";
import { describe, expect, it } from "vitest";
import {
  EMPTY_MODULE_NAVIGATION,
  isModuleNavigationIcon,
  isModuleNavigationPagePath,
  MODULE_NAVIGATION_ICONS,
  MODULE_NAVIGATION_PAGES_MAX,
  moduleManifestNavigation,
  parseModuleManifest,
  safeParseModuleManifest,
} from "../src/index.js";

/**
 * Manifest v9's Dashboard navigation (ADR 0063), and the guarantee that released manifest v8
 * modules keep working unchanged.
 */

const fixtures = path.join(path.dirname(fileURLToPath(import.meta.url)), "fixtures");

function v9Manifest(navigation?: unknown): Record<string, unknown> {
  return {
    manifestVersion: 9,
    id: "signage",
    name: "Signage",
    version: "0.2.0",
    compatibility: { moduleSdk: "^0.2.0", platform: "^0.2.0" },
    entrypoints: { server: "./dist/server/index.js", ui: "./dist/ui/index.js" },
    ...(navigation === undefined ? {} : { navigation }),
  };
}

const pages = [
  { id: "playback", label: "Playback", path: "playback" },
  { id: "timelines", label: "Timelines", path: "timelines" },
  { id: "media", label: "Media", path: "media" },
];

function issues(input: unknown): string[] {
  const parsed = safeParseModuleManifest(input);
  return parsed.success
    ? []
    : parsed.error.issues.map((issue) => `${issue.path.join(".")}: ${issue.message}`);
}

describe("manifest v9 navigation", () => {
  it("accepts a single-page v9 module with no navigation at all: the generic icon, one root page", () => {
    const manifest = parseModuleManifest(v9Manifest());
    expect(manifest.manifestVersion).toBe(9);
    expect(moduleManifestNavigation(manifest)).toEqual({ pages: [] });
    expect(moduleManifestNavigation(manifest).icon).toBeUndefined();
  });

  it("accepts a multi-page module with a Lucide icon, keeping pages in declared order", () => {
    const manifest = parseModuleManifest(v9Manifest({ icon: "monitor-play", pages }));
    const navigation = moduleManifestNavigation(manifest);
    expect(navigation.icon).toBe("monitor-play");
    expect(navigation.pages.map((page) => page.id)).toEqual(["playback", "timelines", "media"]);
    // Reversed in the manifest, reversed in the result: order is the author's, never re-sorted.
    const reversed = moduleManifestNavigation(
      parseModuleManifest(v9Manifest({ pages: [...pages].reverse() })),
    );
    expect(reversed.pages.map((page) => page.id)).toEqual(["media", "timelines", "playback"]);
  });

  it("accepts an icon on its own, and pages on their own", () => {
    expect(moduleManifestNavigation(parseModuleManifest(v9Manifest({ icon: "calendar" })))).toEqual(
      {
        icon: "calendar",
        pages: [],
      },
    );
    expect(
      moduleManifestNavigation(parseModuleManifest(v9Manifest({ pages }))).icon,
    ).toBeUndefined();
  });

  it("accepts multi-segment page paths", () => {
    expect(
      issues(v9Manifest({ pages: [{ id: "library", label: "Library", path: "media/library" }] })),
    ).toEqual([]);
  });

  it.each([
    ["an unknown icon", { icon: "not-an-icon" }],
    ["a PascalCase component name", { icon: "MonitorPlay" }],
    ["an icon as markup", { icon: "<svg onload=alert(1)>" }],
    ["an icon as a URL", { icon: "https://cdn.example.test/icon.svg" }],
    ["an icon as an object", { icon: { svg: "<path/>" } }],
  ])("refuses %s", (_label, navigation) => {
    expect(issues(v9Manifest(navigation))).not.toEqual([]);
  });

  it.each([
    ["an empty path", ""],
    ["the root as a page", "/"],
    ["a leading slash", "/timelines"],
    ["a trailing slash", "timelines/"],
    ["an empty segment", "media//library"],
    ["traversal", "../calendar"],
    ["an inner traversal", "media/../../calendar"],
    ["a dot segment", "./timelines"],
    ["an absolute URL", "https://evil.example.test/x"],
    ["a protocol-relative URL", "//evil.example.test"],
    ["a scheme", "javascript:alert(1)"],
    ["a query", "timelines?x=1"],
    ["a fragment", "timelines#top"],
    ["percent-encoding", "media%2Flibrary"],
    ["a backslash", "media\\library"],
    ["uppercase", "Timelines"],
    ["whitespace", "time lines"],
    ["too many segments", "a/b/c/d/e"],
  ])("refuses a page path with %s", (_label, pagePath) => {
    expect(isModuleNavigationPagePath(pagePath)).toBe(false);
    expect(
      issues(v9Manifest({ pages: [{ id: "page", label: "Page", path: pagePath }] })),
    ).not.toEqual([]);
  });

  it.each([
    ["an uppercase id", { id: "Playback", label: "Playback", path: "playback" }],
    ["an id with a slash", { id: "media/library", label: "Library", path: "library" }],
    ["an empty label", { id: "playback", label: "   ", path: "playback" }],
    ["an overlong label", { id: "playback", label: "x".repeat(61), path: "playback" }],
    [
      "a control character in a label",
      { id: "playback", label: "Play\u0007back", path: "playback" },
    ],
    ["a line separator in a label", { id: "playback", label: "Play\u2028back", path: "playback" }],
    ["an unknown page key", { id: "playback", label: "Playback", path: "playback", icon: "tv" }],
    ["an executable field", { id: "playback", label: "Playback", path: "playback", onClick: "x" }],
  ])("refuses a page with %s", (_label, page) => {
    expect(issues(v9Manifest({ pages: [page] }))).not.toEqual([]);
  });

  it("refuses duplicate page ids and duplicate page paths, naming the duplicate", () => {
    expect(
      issues(
        v9Manifest({
          pages: [
            { id: "media", label: "Media", path: "media" },
            { id: "media", label: "More media", path: "more-media" },
          ],
        }),
      ),
    ).toEqual(["navigation.pages.1.id: media is declared more than once."]);
    expect(
      issues(
        v9Manifest({
          pages: [
            { id: "media", label: "Media", path: "media" },
            { id: "library", label: "Library", path: "media" },
          ],
        }),
      ),
    ).toEqual(["navigation.pages.1.path: Two pages must not declare the same path."]);
  });

  it("refuses a page beneath another page, which would make the open page ambiguous", () => {
    expect(
      issues(
        v9Manifest({
          pages: [
            { id: "media", label: "Media", path: "media" },
            { id: "library", label: "Library", path: "media/library" },
          ],
        }),
      ),
    ).toEqual([
      "navigation.pages.1.path: A page path must not lie beneath another declared page's path.",
    ]);
    // A shared prefix that is not a parent segment is unrelated.
    expect(
      issues(
        v9Manifest({
          pages: [
            { id: "media", label: "Media", path: "media" },
            { id: "media-library", label: "Library", path: "media-library" },
          ],
        }),
      ),
    ).toEqual([]);
  });

  it("bounds the number of pages", () => {
    const many = Array.from({ length: MODULE_NAVIGATION_PAGES_MAX + 1 }, (_, index) => ({
      id: `page-${index}`,
      label: `Page ${index}`,
      path: `page-${index}`,
    }));
    expect(issues(v9Manifest({ pages: many }))).not.toEqual([]);
    expect(issues(v9Manifest({ pages: many.slice(0, MODULE_NAVIGATION_PAGES_MAX) }))).toEqual([]);
  });

  it("refuses navigation for a module with no primary UI, and unknown navigation keys", () => {
    const noUi = {
      ...v9Manifest({ icon: "calendar" }),
      entrypoints: { server: "./dist/server/index.js" },
    };
    expect(issues(noUi)).toEqual([
      "navigation: Navigation can only be declared by a module with a primary UI (entrypoints.ui).",
    ]);
    expect(issues(v9Manifest({ groups: ["media"] }))).not.toEqual([]);
    expect(issues(v9Manifest({ widgets: [] }))).not.toEqual([]);
  });

  it("offers a curated, sorted, duplicate-free set of Lucide names, all in Lucide's kebab-case form", () => {
    expect([...MODULE_NAVIGATION_ICONS]).toEqual([...MODULE_NAVIGATION_ICONS].sort());
    expect(new Set(MODULE_NAVIGATION_ICONS).size).toBe(MODULE_NAVIGATION_ICONS.length);
    for (const icon of MODULE_NAVIGATION_ICONS) {
      expect(icon).toMatch(/^[a-z][a-z0-9]*(?:-[a-z0-9]+)*$/u);
      expect(isModuleNavigationIcon(icon)).toBe(true);
    }
    expect(isModuleNavigationIcon("signage")).toBe(false);
    expect(Object.isFrozen(MODULE_NAVIGATION_ICONS)).toBe(true);
  });
});

describe("released manifest v8 modules", () => {
  it("still accepts the released Signage 0.1.5 manifest exactly as published", async () => {
    const published = JSON.parse(
      await readFile(path.join(fixtures, "released-v8-signage-0.1.5.module.json"), "utf8"),
    ) as Record<string, unknown>;
    const manifest = parseModuleManifest(published);

    expect(manifest.manifestVersion).toBe(8);
    expect(manifest.id).toBe("signage");
    // The settings Signage declares are what Settings reads (ADR 0061), unchanged by v9.
    expect(manifest.configuration.length).toBeGreaterThan(0);
    // A v8 module declares no navigation: the generic icon and one root page.
    expect(moduleManifestNavigation(manifest)).toBe(EMPTY_MODULE_NAVIGATION);
    expect("navigation" in manifest).toBe(false);
  });

  it("never reads navigation into a version 8 document: one that names it is refused, not upgraded", () => {
    const v8WithNavigation = { ...v9Manifest({ icon: "tv" }), manifestVersion: 8 };
    expect(safeParseModuleManifest(v8WithNavigation).success).toBe(false);
  });
});