import { describe, expect, it, vi } from 'vitest';
import { protobuf_decode } from '@snowluma/proton';
import type { SendPacketResult } from '@snowluma/common/packet-sender';
import type { OidbBase } from '@snowluma/proto-defs/oidb';
import type { Oidb0x89a_0MemberPermission } from '@snowluma/proto-defs/oidb-actions/base';

import {
    decodeGroupMemberPermissions,
    GROUP_MEMBER_PERMISSION_MASKS,
    mergeGroupMemberPermission,
    SetMemberPermission,
    type GroupMemberPermission,
} from '../../../src/oidb-services/group-admin/set-member-permission';

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

describe('SetMemberPermission namespace', () => {
    it('declares 0x89A_0', () => {
        expect(SetMemberPermission.command).toBe(0x89a);
        expect(SetMemberPermission.subCommand).toBe(0);
    });

    it.each<[GroupMemberPermission, number]>([
        ['upload_album', 0x1],
        ['temporary_session', 0x10000],
        ['create_group', 0x8000],
    ])('uses the verified deny-bit mask for %s', async (permission, mask) => {
        const sender = makeSender();

        await SetMemberPermission.invoke(sender, {
            groupId: 12345,
            currentPrivilegeFlag: 0x80018001,
            permission,
            allow: true,
        });

        const [command, bytes] = sender.sendRawPacket.mock.calls[0]!;
        expect(command).toBe('OidbSvcTrpcTcp.0x89a_0');
        const envelope = protobuf_decode<OidbBase<Oidb0x89a_0MemberPermission>>(bytes);
        expect(envelope.command).toBe(0x89a);
        expect(envelope.subCommand ?? 0).toBe(0);
        expect(envelope.body).toMatchObject({
            groupUin: 12345n,
            settings: {
                appPrivilegeFlag: Number(BigInt(0x80018001) & ~BigInt(mask)),
                appPrivilegeMask: mask,
            },
        });
    });

    it('sets a deny bit when a capability is disabled', async () => {
        const sender = makeSender();
        await SetMemberPermission.invoke(sender, {
            groupId: 12345,
            currentPrivilegeFlag: 0x80000000,
            permission: 'temporary_session',
            allow: false,
        });

        const envelope = protobuf_decode<OidbBase<Oidb0x89a_0MemberPermission>>(
            sender.sendRawPacket.mock.calls[0]![1],
        );
        expect(envelope.body?.settings).toEqual({
            appPrivilegeFlag: 0x80010000,
            appPrivilegeMask: GROUP_MEMBER_PERMISSION_MASKS.temporary_session,
        });
    });

    it('preserves unrelated bits while changing only the selected capability', () => {
        expect(mergeGroupMemberPermission(0xf0018001, 'upload_album', true)).toBe(0xf0018000);
        expect(mergeGroupMemberPermission(0xf0000000, 'create_group', false)).toBe(0xf0008000);
    });

    it('treats permission bits as deny flags when decoding', () => {
        expect(decodeGroupMemberPermissions(0)).toEqual({
            allowMemberUploadAlbum: true,
            allowMemberTemporarySession: true,
            allowMemberCreateGroup: true,
        });
        expect(decodeGroupMemberPermissions(0x80018001)).toEqual({
            allowMemberUploadAlbum: false,
            allowMemberTemporarySession: false,
            allowMemberCreateGroup: false,
        });
        expect(decodeGroupMemberPermissions(0x80000000)).toEqual({
            allowMemberUploadAlbum: true,
            allowMemberTemporarySession: true,
            allowMemberCreateGroup: true,
        });
    });

    it('round-trips each permission through merge then decode', () => {
        let flag = 0x80000000;
        flag = mergeGroupMemberPermission(flag, 'upload_album', false);
        flag = mergeGroupMemberPermission(flag, 'temporary_session', true);
        flag = mergeGroupMemberPermission(flag, 'create_group', false);
        expect(decodeGroupMemberPermissions(flag)).toEqual({
            allowMemberUploadAlbum: false,
            allowMemberTemporarySession: true,
            allowMemberCreateGroup: false,
        });
    });

    it('keeps explicit zero fields on the wire', async () => {
        const sender = makeSender();
        await SetMemberPermission.invoke(sender, {
            groupId: 1,
            currentPrivilegeFlag: 1,
            permission: 'upload_album',
            allow: true,
        });

        const envelope = protobuf_decode<OidbBase<Oidb0x89a_0MemberPermission>>(
            sender.sendRawPacket.mock.calls[0]![1],
        );
        expect(envelope.body?.settings?.appPrivilegeFlag).toBe(0);
        expect(envelope.body?.settings?.appPrivilegeMask).toBe(1);
    });

    it('rejects an invalid current flag before sending', async () => {
        const sender = makeSender();
        await expect(
            SetMemberPermission.invoke(sender, {
                groupId: 1,
                currentPrivilegeFlag: 0x1_0000_0000,
                permission: 'upload_album',
                allow: true,
            }),
        ).rejects.toThrow(/unsigned 32-bit/);
        expect(sender.sendRawPacket).not.toHaveBeenCalled();
    });
});