import assert from "node:assert/strict";
import { readFileSync } from "node:fs";
import vm from "node:vm";
import test from "node:test";

const rank = vm.createContext({});
vm.runInContext(readFileSync(new URL("../Common/PluginRanking.js", import.meta.url), "utf8").replace(".pragma library", ""), rank);

const NOW = Date.UTC(2026, 9, 10);
const DAY = 86400000;
const ago = days => new Date(NOW - days * DAY).toISOString();
const plugin = (id, extra) => Object.assign({ id, name: id, author: "a-" + id, category: "utilities", upvotes: 0, status: ["reviewed"], compositors: ["any"], screenshot: "x.png", created_at: ago(100), updated_at: ago(100) }, extra || {});
const ids = list => Array.from(list, p => p.id);

test("installed, broken, unmaintained and wrong-compositor plugins are never recommended", () => {
    const list = [plugin("mine", { installed: true, upvotes: 50 }), plugin("broken", { status: ["broken"], upvotes: 50 }), plugin("old", { status: ["unmaintained"], upvotes: 50 }), plugin("hypr", { compositors: ["hyprland"], upvotes: 50 }), plugin("ok", { upvotes: 1 })];
    assert.deepEqual(ids(rank.recommend(list, { now: NOW, compositor: "niri" })), ["ok"]);
    assert.deepEqual(ids(rank.recommend(list, { now: NOW, compositor: "hyprland" })), ["hypr", "ok"]);
});

test("a plugin similar to an installed one outranks a slightly more voted stranger", () => {
    const list = [plugin("shot", { installed: true, similar: ["capture"] }), plugin("capture", { upvotes: 3 }), plugin("stranger", { upvotes: 6, category: "media" })];
    assert.equal(rank.recommend(list, { now: NOW })[0].id, "capture");
    assert.equal(rank.reason(list[1], rank.buildTaste(list), NOW), "similar");
});

test("votes still win when the gap is large", () => {
    const list = [plugin("shot", { installed: true, similar: ["capture"] }), plugin("capture", { upvotes: 1 }), plugin("star", { upvotes: 400, category: "media" })];
    assert.equal(rank.recommend(list, { now: NOW })[0].id, "star");
});

test("trending favours votes gathered fast over the same votes gathered slowly", () => {
    const list = [plugin("veteran", { upvotes: 10, created_at: ago(400) }), plugin("rising", { upvotes: 10, created_at: ago(10) }), plugin("silent", { upvotes: 0, created_at: ago(1) })];
    assert.deepEqual(ids(rank.trendingNow(list, { now: NOW })), ["rising", "veteran"]);
});

test("a single vote on a brand-new plugin does not beat an established one", () => {
    const list = [plugin("fresh", { upvotes: 1, created_at: ago(0) }), plugin("solid", { upvotes: 30, created_at: ago(60) })];
    assert.equal(rank.trendingNow(list, { now: NOW })[0].id, "solid");
});

test("one author gets at most two places", () => {
    const list = ["a", "b", "c", "d"].map((id, i) => plugin(id, { author: "same", upvotes: 40 - i })).concat([plugin("other", { upvotes: 1 })]);
    assert.deepEqual(ids(rank.recommend(list, { now: NOW, limit: 3 })), ["a", "b", "other"]);
});

test("a short shelf is filled with the entries the author limit skipped", () => {
    const list = [1, 2, 3, 4].map(n => plugin("p" + n, { author: "same", upvotes: 10 - n }));
    assert.deepEqual(ids(rank.recommend(list, { now: NOW, limit: 3 })), ["p1", "p2", "p3"]);
    list.push(plugin("other", { upvotes: 1 }));
    assert.deepEqual(ids(rank.recommend(list, { now: NOW, limit: 3 })), ["p1", "p2", "other"]);
});

test("excluded ids are left out of every shelf", () => {
    const list = [plugin("a", { upvotes: 9, created_at: ago(2) }), plugin("b", { upvotes: 5, created_at: ago(3) })];
    const options = { now: NOW, exclude: ["a"] };
    assert.deepEqual(ids(rank.recommend(list, options)), ["b"]);
    assert.deepEqual(ids(rank.trendingNow(list, options)), ["b"]);
    assert.deepEqual(ids(rank.newArrivals(list, options)), ["b"]);
});

test("new arrivals are the last two weeks, newest first", () => {
    const list = [plugin("month", { created_at: ago(30) }), plugin("week", { created_at: ago(6) }), plugin("today", { created_at: ago(0.2) }), plugin("undated", { created_at: "" })];
    assert.deepEqual(ids(rank.newArrivals(list, { now: NOW })), ["today", "week"]);
});

test("picks are stable within their period, differ from each other and rotate", () => {
    const list = [];
    for (let i = 0; i < 60; i++)
        list.push(plugin("p" + i, { upvotes: 60 - i }));
    const day = rank.pickOfTheDay(list, NOW);
    const week = rank.pickOfTheWeek(list, NOW);
    assert.equal(rank.pickOfTheDay(list, NOW + 5 * 3600000).id, day.id);
    assert.notEqual(day.id, week.id);
    const monday = Date.UTC(2026, 9, 5);
    const weekIds = new Set([0, 1, 2, 3, 4, 5, 6].map(d => rank.pickOfTheWeek(list, monday + d * DAY).id));
    assert.equal(weekIds.size, 1);
    const days = new Set();
    for (let d = 0; d < 30; d++)
        days.add(rank.pickOfTheDay(list, NOW + d * DAY).id);
    assert.ok(days.size >= 12, "30 days gave only " + days.size + " different picks");
    const weeks = new Set();
    for (let w = 0; w < 12; w++)
        weeks.add(rank.pickOfTheWeek(list, NOW + w * 7 * DAY).id);
    assert.ok(weeks.size >= 5, "12 weeks gave only " + weeks.size + " different picks");
});

test("picks need a review and a screenshot, and survive an empty list", () => {
    assert.equal(rank.pickOfTheDay([], NOW), null);
    assert.equal(rank.pickOfTheWeek([plugin("raw", { status: [] }), plugin("blind", { screenshot: "" })], NOW), null);
});

test("no taste, no dates, no votes: still a deterministic order", () => {
    const list = [{ id: "b" }, { id: "a" }, { id: "c", upvotes: 1 }];
    assert.deepEqual(ids(rank.recommend(list, { now: NOW })), ["c", "a", "b"]);
});

test("a card is marked new for two weeks, then updated for a week after a release", () => {
    assert.equal(rank.recency(plugin("a", { created_at: ago(3), updated_at: ago(1) }), NOW), "new");
    assert.equal(rank.recency(plugin("b", { created_at: ago(90), updated_at: ago(2) }), NOW), "updated");
    assert.equal(rank.recency(plugin("c", { created_at: ago(90), updated_at: ago(30) }), NOW), "");
    assert.equal(rank.recency(plugin("d", { created_at: undefined, updated_at: undefined }), NOW), "");
});

test("a plugin limited to other compositors names them, a portable one names none", () => {
    assert.deepEqual(Array.from(rank.unsupportedOn(plugin("a", { compositors: ["hyprland", "sway"] }), "niri")), ["hyprland", "sway"]);
    assert.deepEqual(Array.from(rank.unsupportedOn(plugin("b", { compositors: ["niri"] }), "niri")), []);
    assert.deepEqual(Array.from(rank.unsupportedOn(plugin("c", { compositors: ["any"] }), "niri")), []);
    assert.deepEqual(Array.from(rank.unsupportedOn(plugin("d", { compositors: ["hyprland"] }), "")), []);
    assert.deepEqual(Array.from(rank.unsupportedOn(plugin("e", { compositors: undefined }), "niri")), []);
});

test("quick filters keep only the plugins matching every set filter", () => {
    const here = plugin("a", { compositors: ["niri"], firstParty: true, created_at: ago(2), updated_at: ago(1) });
    const elsewhere = plugin("b", { compositors: ["hyprland"], firstParty: false, created_at: ago(200), updated_at: ago(100) });
    assert.equal(rank.matchesFilters(elsewhere, {}, "niri", NOW), true);
    assert.equal(rank.matchesFilters(elsewhere, null, "niri", NOW), true);
    assert.equal(rank.matchesFilters(here, { usable: true, fresh: true, official: true }, "niri", NOW), true);
    assert.equal(rank.matchesFilters(elsewhere, { usable: true }, "niri", NOW), false);
    assert.equal(rank.matchesFilters(elsewhere, { fresh: true }, "niri", NOW), false);
    assert.equal(rank.matchesFilters(elsewhere, { official: true }, "niri", NOW), false);
    assert.equal(rank.matchesFilters(here, { usable: true }, "hyprland", NOW), false);
});

test("lists that are not real arrays (QML sequences) are still read", () => {
    const seq = items => Object.assign(Object.create(null), items, { length: items.length });
    assert.equal(rank.isUsable(plugin("a", { compositors: seq(["hyprland"]) }), "niri"), false);
    assert.equal(rank.isUsable(plugin("b", { status: seq(["broken"]) }), "niri"), false);
    assert.deepEqual(Array.from(rank.unsupportedOn(plugin("c", { compositors: seq(["hyprland"]) }), "niri")), ["hyprland"]);
});