import { describe, expect, it } from "@suaveplan/testing/runner";
import { AUDIO_FX_CODES, AudioFxError } from "../error-codes/error-codes.js";
import {
    assertPresetMatchesPluginType,
    assertPresetVersionSupported,
    PresetSnapshotSchema,
    parsePresetSnapshot,
} from "./preset.js";

describe("preset: parsePresetSnapshot", () => {
    it("accepts a minimal valid envelope", { timeout: 5_000 }, () => {
        const parsed = parsePresetSnapshot({
            schemaVersion: 1,
            pluginType: "eq",
            parameters: { gain: 0 },
        });
        expect(parsed.schemaVersion).toBe(1);
        expect(parsed.pluginType).toBe("eq");
        expect(parsed.parameters.gain).toBe(0);
        expect(parsed.data).toBeUndefined();
    });

    it("accepts an envelope with plugin-specific data blob", {
        timeout: 5_000,
    }, () => {
        const parsed = parsePresetSnapshot({
            schemaVersion: 2,
            pluginType: "eq",
            parameters: {},
            data: { bands: [{ freq: 100, gain: 3 }] },
        });
        expect(parsed.data).toEqual({ bands: [{ freq: 100, gain: 3 }] });
    });

    it("rejects missing required fields with AUDIO_FX.INVALID_PRESET", {
        timeout: 5_000,
    }, () => {
        try {
            parsePresetSnapshot({ pluginType: "eq", parameters: {} });
        } catch (error) {
            expect(error).toBeInstanceOf(AudioFxError);
            const fxError = error as AudioFxError;
            expect(fxError.code).toBe(AUDIO_FX_CODES.INVALID_PRESET);
            expect(fxError.context?.issues).toBeDefined();
            return;
        }
        throw new Error("expected parsePresetSnapshot to throw");
    });

    it("rejects negative schemaVersion", { timeout: 5_000 }, () => {
        try {
            parsePresetSnapshot({
                schemaVersion: -1,
                pluginType: "eq",
                parameters: {},
            });
        } catch (error) {
            expect((error as AudioFxError).code).toBe(
                AUDIO_FX_CODES.INVALID_PRESET
            );
            return;
        }
        throw new Error("expected parsePresetSnapshot to throw");
    });

    it("rejects non-number parameter values", { timeout: 5_000 }, () => {
        try {
            parsePresetSnapshot({
                schemaVersion: 1,
                pluginType: "eq",
                parameters: { gain: "loud" },
            });
        } catch (error) {
            expect((error as AudioFxError).code).toBe(
                AUDIO_FX_CODES.INVALID_PRESET
            );
            return;
        }
        throw new Error("expected parsePresetSnapshot to throw");
    });

    it("rejects empty pluginType", { timeout: 5_000 }, () => {
        try {
            parsePresetSnapshot({
                schemaVersion: 1,
                pluginType: "",
                parameters: {},
            });
        } catch (error) {
            expect((error as AudioFxError).code).toBe(
                AUDIO_FX_CODES.INVALID_PRESET
            );
            return;
        }
        throw new Error("expected parsePresetSnapshot to throw");
    });
});

describe("preset: PresetSnapshotSchema direct usage", () => {
    it("exposes the same schema for callers that want safeParse directly", {
        timeout: 5_000,
    }, () => {
        const ok = PresetSnapshotSchema.safeParse({
            schemaVersion: 1,
            pluginType: "eq",
            parameters: {},
        });
        expect(ok.success).toBe(true);
    });
});

describe("preset: assertPresetVersionSupported", () => {
    it("passes when preset version <= supported", {
        timeout: 5_000,
    }, () => {
        const preset = parsePresetSnapshot({
            schemaVersion: 1,
            pluginType: "eq",
            parameters: {},
        });
        expect(() => assertPresetVersionSupported(preset, 1)).not.toThrow();
        expect(() => assertPresetVersionSupported(preset, 2)).not.toThrow();
    });

    it("throws AUDIO_FX.PRESET_VERSION_UNSUPPORTED when preset version > supported", {
        timeout: 5_000,
    }, () => {
        const preset = parsePresetSnapshot({
            schemaVersion: 3,
            pluginType: "eq",
            parameters: {},
        });
        try {
            assertPresetVersionSupported(preset, 1);
        } catch (error) {
            const fxError = error as AudioFxError;
            expect(fxError.code).toBe(
                AUDIO_FX_CODES.PRESET_VERSION_UNSUPPORTED
            );
            expect(fxError.context?.presetVersion).toBe(3);
            expect(fxError.context?.supported).toBe(1);
            return;
        }
        throw new Error("expected assertPresetVersionSupported to throw");
    });
});

describe("preset: assertPresetMatchesPluginType", () => {
    it("passes when pluginType matches", { timeout: 5_000 }, () => {
        const preset = parsePresetSnapshot({
            schemaVersion: 1,
            pluginType: "eq",
            parameters: {},
        });
        expect(() => assertPresetMatchesPluginType(preset, "eq")).not.toThrow();
    });

    it("throws AUDIO_FX.INVALID_PRESET when pluginType differs", {
        timeout: 5_000,
    }, () => {
        const preset = parsePresetSnapshot({
            schemaVersion: 1,
            pluginType: "reverb",
            parameters: {},
        });
        try {
            assertPresetMatchesPluginType(preset, "eq");
        } catch (error) {
            const fxError = error as AudioFxError;
            expect(fxError.code).toBe(AUDIO_FX_CODES.INVALID_PRESET);
            expect(fxError.context?.presetPluginType).toBe("reverb");
            expect(fxError.context?.expected).toBe("eq");
            return;
        }
        throw new Error("expected assertPresetMatchesPluginType to throw");
    });
});