const assert = require("node:assert/strict");
const fs = require("node:fs");
const path = require("node:path");
const test = require("node:test");

const eleventyConfig = require("../.eleventy.js");

test("selects the newest news article without relying on a version", () => {
    const older = { date: new Date("2026-08-22"), data: { title: "Older" } };
    const newest = { date: new Date("2026-09-03"), data: { title: "Newest" } };

    assert.deepEqual(
        eleventyConfig.selectLatestNews([older, newest]),
        [newest]
    );
});

test("an empty news collection omits the latest-news item safely", () => {
    assert.deepEqual(eleventyConfig.selectLatestNews([]), []);
    assert.deepEqual(eleventyConfig.selectLatestNews(), []);
});

test("homepage keeps the statistical result tied to its limits", () => {
    const source = fs.readFileSync(
        path.join(__dirname, "../src/index.njk"),
        "utf8"
    );

    assert.match(source, /almost 30% higher chat reply rate/);
    assert.match(source, /chat replies, not completed QSOs/);
    assert.match(source, /correlation within[\s\S]*not general proof of causation/);
    assert.match(source, /July 2025 contest/);
    assert.match(source, /144\/432 MHz and Microwave categories/);
});

test("background page links all public papers and no ODT source", () => {
    const source = fs.readFileSync(
        path.join(__dirname, "../src/background/index.njk"),
        "utf8"
    );

    for (const name of [
        "kst4contest-ghz-tagung-2025-de.pdf",
        "kst4contest-ghz-tagung-2025-en.pdf",
        "kst4contest-ghz-tagung-2026-de.pdf",
        "kst4contest-ghz-tagung-2026-en.pdf"
    ]) {
        assert.match(source, new RegExp(name.replaceAll(".", "\\.")));
    }
    assert.doesNotMatch(source, /\.odt\b/i);
});

test("homepage contains one selected function grid and a complete-overview link", () => {
    const source = fs.readFileSync(
        path.join(__dirname, "../src/index.njk"),
        "utf8"
    );

    assert.equal((source.match(/<h2>The parts most often used during a contest<\/h2>/g) || []).length, 1);
    assert.match(source, /href="\/features\/"[^>]*>Open the complete function overview/);
    assert.doesNotMatch(source, /Observe|Evaluate|>Act<|One workflow, shared context/);
});