import { describe, expect, it, vi } from 'vitest';
import { protobuf_decode } from '@snowluma/proton';
import type { OidbBase } from '@snowluma/proto-defs/oidb';
import type { OidbGroupReaction } from '@snowluma/proto-defs/oidb-actions/base';
import type { SendPacketResult } from '@snowluma/common/packet-sender';

import { SetReaction } from '../../../src/oidb-services/reaction/set-reaction';

function makeSender() {
    const defaultResp: SendPacketResult = {
        success: true,
        gotResponse: true,
        errorCode: 0,
        errorMessage: '',
        responseData: Buffer.alloc(0),
    };
    return { sendRawPacket: vi.fn(async () => defaultResp) };
}

describe('SetReaction namespace', () => {
    it('declares command = 0x9082', () => {
        expect(SetReaction.command).toBe(0x9082);
    });

    it('resolveSubCommand: isSet=true → 1, isSet=false → 2', () => {
        expect(
            SetReaction.resolveSubCommand({ groupId: 1, sequence: 1, code: 'x', isSet: true }),
        ).toBe(1);
        expect(
            SetReaction.resolveSubCommand({ groupId: 1, sequence: 1, code: 'x', isSet: false }),
        ).toBe(2);
    });

    describe('serialize', () => {
        it('produces type=1 for short QQ-face codes (≤3 chars)', () => {
            const out = SetReaction.serialize({} as any, {
                groupId: 12345,
                sequence: 99,
                code: '76',
                isSet: true,
            });
            expect(out).toEqual({
                groupUin: 12345,
                sequence: 99,
                code: '76',
                type: 1,
                field6: false,
                field7: false,
            });
        });

        it('produces type=1 for exactly 3-character codes (boundary)', () => {
            const out = SetReaction.serialize({} as any, {
                groupId: 1,
                sequence: 1,
                code: '999',
                isSet: true,
            });
            expect(out.type).toBe(1);
        });

        it('produces type=2 for codes longer than 3 chars (unicode codepoint)', () => {
            const out = SetReaction.serialize({} as any, {
                groupId: 1,
                sequence: 1,
                code: '128516',
                isSet: false,
            });
            expect(out.type).toBe(2);
        });

        it('passes through groupId/sequence/code verbatim', () => {
            const out = SetReaction.serialize({} as any, {
                groupId: 999,
                sequence: 42,
                code: 'abc',
                isSet: true,
            });
            expect(out.groupUin).toBe(999);
            expect(out.sequence).toBe(42);
            expect(out.code).toBe('abc');
        });

        it('always sets field6/field7 to false (deferred behaviour)', () => {
            const out = SetReaction.serialize({} as any, {
                groupId: 1,
                sequence: 1,
                code: 'x',
                isSet: true,
            });
            expect(out.field6).toBe(false);
            expect(out.field7).toBe(false);
        });
    });

    describe('deserialize', () => {
        it('always returns void regardless of body content', () => {
            expect(SetReaction.deserialize({} as any, {})).toBeUndefined();
        });
    });

    describe('encode / decode round trip', () => {
        it('encode preserves groupUin/sequence/code/type in the envelope body', () => {
            const env: OidbBase<OidbGroupReaction> = {
                command: 0x9082,
                subCommand: 1,
                body: { groupUin: 12345, sequence: 99, code: '76', type: 1 } as OidbGroupReaction,
            };
            const bytes = SetReaction.encode(env);
            const decoded = SetReaction.decode(bytes);
            expect(decoded.command).toBe(0x9082);
            expect(decoded.subCommand).toBe(1);
        });
    });

    describe('invoke (e2e via mock sender)', () => {
        it('routes to OidbSvcTrpcTcp.0x9082_1 when isSet=true', async () => {
            const sender = makeSender();
            await SetReaction.invoke(sender, {
                groupId: 12345,
                sequence: 99,
                code: '76',
                isSet: true,
            });
            expect(sender.sendRawPacket).toHaveBeenCalledOnce();
            expect(sender.sendRawPacket.mock.calls[0]![0]).toBe('OidbSvcTrpcTcp.0x9082_1');
        });

        it('routes to OidbSvcTrpcTcp.0x9082_2 when isSet=false', async () => {
            const sender = makeSender();
            await SetReaction.invoke(sender, {
                groupId: 12345,
                sequence: 99,
                code: '76',
                isSet: false,
            });
            expect(sender.sendRawPacket.mock.calls[0]![0]).toBe('OidbSvcTrpcTcp.0x9082_2');
        });

        it('packages the serialized body into the OIDB envelope wire', async () => {
            const sender = makeSender();
            await SetReaction.invoke(sender, {
                groupId: 12345,
                sequence: 99,
                code: '128516',
                isSet: true,
            });
            const [, bytes] = sender.sendRawPacket.mock.calls[0]!;
            const env = protobuf_decode<OidbBase<OidbGroupReaction>>(bytes);
            expect(env.command).toBe(0x9082);
            expect(env.subCommand).toBe(1);
            expect(env.body).toMatchObject({
                groupUin: 12345,
                sequence: 99,
                code: '128516',
                type: 2,
            });
        });

        it('resolves to undefined (void)', async () => {
            const sender = makeSender();
            const result = await SetReaction.invoke(sender, {
                groupId: 1,
                sequence: 1,
                code: 'x',
                isSet: true,
            });
            expect(result).toBeUndefined();
        });
    });
});