/*
 * Veskslop — unit tests for the pure communication logic.
 *
 * Usage: pnpm test:comm
 */

import assert from "node:assert/strict";

import {
    MessageLog,
    TRUSTED_LOG_LIMIT,
    UNTRUSTED_LOG_LIMIT,
    assembleContext,
    compareSnowflakes,
    extractMentionIds,
    formatContextLine,
    hasTier,
    isTrusted,
    parseCommand,
    parsePoll,
    parseTier,
    redactSecrets,
    stripMentions,
    toCachedMessage,
    type CachedMessage,
    type PuppetMessage
} from "./communication.js";
import { PACING, planSend } from "./pacing.js";

function cached(id: number, content = `m${id}`): CachedMessage {
    return { id: String(id), authorId: "1", authorName: "a", content, timestamp: "" };
}

function entry(id: number, trusted: boolean): PuppetMessage {
    return {
        id: String(id),
        channelId: "c",
        authorId: trusted ? "owner" : "stranger",
        authorName: "tester",
        content: `msg ${id}`,
        timestamp: new Date().toISOString(),
        trusted
    };
}

// ring buffer limits
{
    const log = new MessageLog();
    for (let i = 0; i < 150; i++) log.add(entry(i, true));
    assert.equal(log.trusted.length, TRUSTED_LOG_LIMIT);
    assert.equal(log.trusted[0].id, "50");

    for (let i = 0; i < 40; i++) log.add(entry(i, false));
    assert.equal(log.untrusted.length, UNTRUSTED_LOG_LIMIT);
    assert.equal(log.untrusted[0].id, "10");
}

// mentions
{
    const ids = extractMentionIds("<@!42> hi <@7>", [{ id: "9" }]);
    assert.deepEqual([...ids].sort(), ["42", "7", "9"]);
    assert.equal(stripMentions("<@!42>   whitelist   list", new Set(["42"])), "whitelist list");
    assert.equal(stripMentions("<@42> <@99> hey", new Set(["42"])), "<@99> hey");
}

// commands
{
    assert.deepEqual(parseCommand("  WHITELIST add <@123> "), { name: "whitelist", args: ["add", "<@123>"] });
    assert.deepEqual(parseCommand("whitelist list"), { name: "whitelist", args: ["list"] });
    assert.equal(parseCommand("   "), undefined);
}

// trust
{
    assert.equal(isTrusted("owner", "owner", []), true);
    assert.equal(isTrusted("trusted", "owner", ["trusted"]), true);
    assert.equal(isTrusted("stranger", "owner", ["trusted"]), false);
}

// pacing: fast first send in a burst, 500-2800 ms afterwards, variable reset
{
    for (let i = 0; i < 200; i++) {
        const first = planSend(1_000_000, 0);
        assert.ok(
            first.delay >= PACING.firstMinMs && first.delay <= PACING.firstMaxMs,
            `first delay out of range: ${first.delay}`
        );
        assert.ok(
            first.burstUntil - 1_000_000 >= PACING.idleMinMs && first.burstUntil - 1_000_000 <= PACING.idleMaxMs,
            `burst window out of range: ${first.burstUntil}`
        );

        const followUp = planSend(1_000_000, 1_001_000);
        assert.ok(
            followUp.delay >= PACING.burstMinMs && followUp.delay <= PACING.burstMaxMs,
            `burst delay out of range: ${followUp.delay}`
        );

        // A fresh burst after the window expired is fast again.
        const resumed = planSend(2_000_000, 1_000_000);
        assert.ok(
            resumed.delay >= PACING.firstMinMs && resumed.delay <= PACING.firstMaxMs,
            `resumed delay out of range: ${resumed.delay}`
        );
    }
}

// context assembly
{
    const messages = Array.from({ length: 20 }, (_, i) => cached(100 + i));
    const byCount = assembleContext(messages, { maxMessages: 15, maxChars: 1_000_000 });
    assert.equal(byCount.messages.length, 15);
    assert.equal(byCount.messages[0].id, "105");
    assert.equal(byCount.truncated, true);

    const long = Array.from({ length: 10 }, (_, i) => cached(i, "y".repeat(50)));
    const byChars = assembleContext(long, { maxMessages: 15, maxChars: 120 });
    assert.equal(byChars.messages.length, 2);
    assert.ok(byChars.chars <= 120);
    assert.equal(byChars.truncated, true);

    // the newest message is always kept, even when it exceeds the budget
    const single = assembleContext([cached(1, "z".repeat(5000))], { maxChars: 100 });
    assert.equal(single.messages.length, 1);

    // the trigger message can be excluded
    const excluded = assembleContext([cached(1), cached(2), cached(3)], { excludeId: "3" });
    assert.deepEqual(
        excluded.messages.map(m => m.id),
        ["1", "2"]
    );
}

// context formatting and snowflake compare
{
    const withFile: CachedMessage = { ...cached(1, "look"), attachments: ["clip.mp4"] };
    assert.equal(formatContextLine(withFile), "a: look [file: clip.mp4]");
    assert.equal(formatContextLine({ ...cached(2, ""), attachments: ["a.png"] }), "a: [file: a.png]");

    assert.equal(compareSnowflakes("10", "9"), 1);
    assert.equal(compareSnowflakes("9", "10"), -1);
    assert.equal(compareSnowflakes("5", "5"), 0);
}

// raw message conversion keeps file names only
{
    const converted = toCachedMessage({
        id: 5,
        author: { id: 7, username: "u" },
        content: "see this",
        timestamp: "t",
        attachments: [{ filename: "a.png" }, { filename: "b.mp4" }]
    });
    assert.deepEqual(converted, {
        id: "5",
        authorId: "7",
        authorName: "u",
        content: "see this",
        timestamp: "t",
        attachments: ["a.png", "b.mp4"]
    });
}

// timestamps in context lines
{
    const withTime: CachedMessage = {
        ...cached(1, "hi"),
        timestamp: "2026-09-11T14:03:00.000Z"
    };
    assert.match(formatContextLine(withTime), /^\[\d\d:\d\d\] a: hi$/);
    assert.equal(formatContextLine(cached(2, "no time")), "a: no time");
}

// secret redaction
{
    const fakeToken = `${"x".repeat(24)}.${"abcde"}.${"y".repeat(25)}`;
    assert.equal(redactSecrets(`token ${fakeToken} here`), "token [redacted] here");
    assert.equal(redactSecrets("mfa." + "z".repeat(30)), "[redacted]");
    assert.equal(redactSecrets("nothing to hide"), "nothing to hide");
}

// trust tiers
{
    assert.equal(hasTier("admin", "admin"), true);
    assert.equal(hasTier("trusted", "admin"), false);
    assert.equal(hasTier("trusted", "user"), true);
    assert.equal(hasTier(undefined, "user"), false);
    assert.equal(parseTier("trusted"), "trusted");
    assert.equal(parseTier("bogus"), undefined);
}

// log lookup by ID
{
    const log = new MessageLog();
    log.add({ ...entry(1, true), context: [] });
    assert.equal(log.find("1")?.id, "1");
    assert.equal(log.find("nope"), undefined);
}

// poll parser
{
    assert.deepEqual(parsePoll("Lunch? | Pizza | Sushi"), { question: "Lunch?", options: ["Pizza", "Sushi"] });
    assert.deepEqual(parsePoll("Q | A | B | C | D"), { question: "Q", options: ["A", "B", "C", "D"] });
    assert.deepEqual(parsePoll('"What country is best" Sweden // Denmark // Madagaskar'), {
        question: "What country is best",
        options: ["Sweden", "Denmark", "Madagaskar"]
    });
    // the whitespace guard keeps URLs together
    assert.deepEqual(parsePoll('"Links?" https://a.example // https://b.example'), {
        question: "Links?",
        options: ["https://a.example", "https://b.example"]
    });
    assert.equal(parsePoll("Q | A"), undefined);
    assert.equal(parsePoll("Q | A | B | C | D | E"), undefined);
    assert.equal(parsePoll(`Q | ${"x".repeat(100)} | B`), undefined);
}

console.log("all communication tests passed");