#!/usr/bin/env node
/**
 * ObsiGate — pure tests for the navigation page facets/filters (#158):
 * `frontend/js/navfacets.js` (no DOM, real module import).
 *
 * Usage: node tests/frontend/navfacets.test.mjs
 */

import { strict as assert } from "node:assert";
import { buildNavFacets, filterNavFiles, sortNavFiles, navDisplayName } from "../../frontend/js/navfacets.js";

const files = [
  { name: "note2.md", path: "note2.md", vault: "V1", extension: "md", modified: 100, tags: ["docker"] },
  { name: "note1.md", path: "note1.md", vault: "V1", extension: "md", modified: 300, tags: ["python", "docker"] },
  { name: "photo.png", path: "sub/photo.png", vault: "V1", extension: ".PNG", modified: 200, tags: [] },
  { name: "sans-titre.md", path: "sans-titre.md", vault: "V1", extension: "md", modified: 400 },
];

let pass = 0;
function test(name, fn) {
  try {
    fn();
    pass++;
    console.log(`  ✓ ${name}`);
  } catch (err) {
    console.error(`  ✗ ${name}\n    ${err.message}`);
    process.exitCode = 1;
  }
}

test("buildNavFacets counts vaults/tags/extensions, sorted desc", () => {
  const f = buildNavFacets(files);
  assert.deepStrictEqual(f.vaults, { V1: 4 });
  assert.deepStrictEqual(f.tags, { docker: 2, python: 1 });
  // leading dot stripped + lowercased, untagged file contributes nothing
  assert.deepStrictEqual(f.extensions, { md: 3, png: 1 });
});

test("buildNavFacets tolerates empty/missing input", () => {
  assert.deepStrictEqual(buildNavFacets([]), { vaults: {}, tags: {}, extensions: {} });
  assert.deepStrictEqual(buildNavFacets(undefined), { vaults: {}, tags: {}, extensions: {} });
});

test("filterNavFiles: no filter returns the input untouched", () => {
  assert.strictEqual(filterNavFiles(files, {}), files);
  assert.strictEqual(filterNavFiles(files, { tag: "", ext: "" }), files);
});

test("filterNavFiles: tag filter keeps files carrying the tag", () => {
  const out = filterNavFiles(files, { tag: "docker" });
  assert.deepStrictEqual(out.map((f) => f.name).sort(), ["note1.md", "note2.md"]);
});

test("filterNavFiles: extension filter is dot-insensitive", () => {
  assert.deepStrictEqual(filterNavFiles(files, { ext: "png" }).map((f) => f.name), ["photo.png"]);
  assert.deepStrictEqual(filterNavFiles(files, { ext: ".png" }).map((f) => f.name), ["photo.png"]);
});

test("filterNavFiles: tag + ext combine (AND) and can empty the list", () => {
  assert.deepStrictEqual(filterNavFiles(files, { tag: "docker", ext: "md" }).map((f) => f.name).sort(), ["note1.md", "note2.md"]);
  assert.deepStrictEqual(filterNavFiles(files, { tag: "python", ext: "png" }), []);
});

test("sortNavFiles 'modified' = newest first", () => {
  assert.deepStrictEqual(sortNavFiles(files, "modified").map((f) => f.modified), [400, 300, 200, 100]);
});

test("sortNavFiles 'relevance' = alphabetical, .md stripped, case-insensitive", () => {
  const names = sortNavFiles(files, "relevance").map(navDisplayName);
  assert.deepStrictEqual(names, ["note1", "note2", "photo.png", "sans-titre"]);
});

test("sortNavFiles does not mutate its input", () => {
  const before = files.map((f) => f.name);
  sortNavFiles(files, "relevance");
  sortNavFiles(files, "modified");
  assert.deepStrictEqual(files.map((f) => f.name), before);
});

test("navDisplayName strips only a trailing .md", () => {
  assert.strictEqual(navDisplayName({ name: "a.md" }), "a");
  assert.strictEqual(navDisplayName({ name: "a.markdown" }), "a.markdown");
  assert.strictEqual(navDisplayName({ path: "dir/b.md" }), "b");
});

console.log(`\n${pass} passed`);