import { describe, expect, it } from "@suaveplan/testing/runner";
import {
    GM_LEVEL1_FAMILIES,
    GM_LEVEL1_PATCHES,
    GM_LEVEL1_PERCUSSION,
    GM_LEVEL2_VARIATIONS,
    GS_VARIATIONS,
    gm2Key,
    XG_VARIATIONS,
} from "../src/gm/index.js";
import { MIDI_MESSAGE_TYPES } from "../src/message/message.types.js";
import { midi1ToUmp, umpToMidi1 } from "../src/ump/ump.js";

describe("General MIDI Level 1 table integrity", () => {
    it("has all 128 programs", { timeout: 5000 }, () => {
        expect(Object.keys(GM_LEVEL1_PATCHES).length).toBe(128);
        for (let i = 0; i < 128; i += 1) {
            expect(typeof GM_LEVEL1_PATCHES[i]).toBe("string");
        }
    });

    it("GM patch 0 is Acoustic Grand Piano", { timeout: 5000 }, () => {
        expect(GM_LEVEL1_PATCHES[0]).toBe("Acoustic Grand Piano");
    });

    it("has percussion notes 35..81 (47 entries)", { timeout: 5000 }, () => {
        expect(Object.keys(GM_LEVEL1_PERCUSSION).length).toBe(81 - 35 + 1);
        expect(GM_LEVEL1_PERCUSSION[36]).toBe("Bass Drum 1");
        expect(GM_LEVEL1_PERCUSSION[42]).toBe("Closed Hi Hat");
        expect(GM_LEVEL1_PERCUSSION[81]).toBe("Open Triangle");
    });

    it("families list has 16 entries", { timeout: 5000 }, () => {
        expect(GM_LEVEL1_FAMILIES.length).toBe(16);
    });

    it("GM2 / GS / XG dialects expose at least one variation each", {
        timeout: 5000,
    }, () => {
        expect(Object.keys(GM_LEVEL2_VARIATIONS).length).toBeGreaterThan(0);
        expect(Object.keys(GS_VARIATIONS).length).toBeGreaterThan(0);
        expect(Object.keys(XG_VARIATIONS).length).toBeGreaterThan(0);
    });

    it("gm2Key composes the same way both tables encode", {
        timeout: 5000,
    }, () => {
        expect(gm2Key(4, 1)).toBe(4 * 256 + 1);
        expect(GM_LEVEL2_VARIATIONS[gm2Key(4, 1)]).toBe(
            "Detuned Electric Piano 1"
        );
    });
});

describe("UMP framing invariants", () => {
    it("group bits map to bits 24..27 of word 0", { timeout: 5000 }, () => {
        const packet = midi1ToUmp(
            { type: "noteOn", channel: 0, note: 60, velocity: 100 },
            3
        );
        expect(((packet.words[0] as number) >>> 24) & 0xf).toBe(3);
    });

    it("channel-voice round-trip preserves all 16 channels", {
        timeout: 5000,
    }, () => {
        for (let ch = 0; ch < 16; ch += 1) {
            const msg = {
                type: "noteOn" as const,
                channel: ch,
                note: 60,
                velocity: 64,
            };
            expect(umpToMidi1(midi1ToUmp(msg, 0))).toEqual(msg);
        }
    });
});

describe("Message-type registry", () => {
    it("MIDI_MESSAGE_TYPES contains all 18 variants exactly once", {
        timeout: 5000,
    }, () => {
        expect(MIDI_MESSAGE_TYPES.length).toBe(18);
        expect(new Set(MIDI_MESSAGE_TYPES).size).toBe(18);
    });
});