// Tests for the Event0x2DC subType=16 (GroupMsgEmojiLike) end-to-end:
//   - decoder strips the 7-byte prefix and decodes GroupReactNotify
//   - field13==35 yields a GroupMsgEmojiLikeEvent
//   - field13!=35 surfaces under MsgPush.Unknown and emits nothing
//   - converter shape matches the gocqhttp / NapCat extension layout
//   - formatEvent prints something readable in the [Event] log

import { afterEach, beforeEach, describe, expect, it } from 'vitest';
import type { PacketInfo } from '@snowluma/common/protocol-types';
import { protobuf_encode } from '@snowluma/proton';
import type { GroupReactNotify } from '@snowluma/proto-defs/notify';
import { MSG_PUSH_CMD, parseMsgPush } from '@snowluma/protocol/msg-push';
import { decodeEvent0x2DC } from '@snowluma/protocol/msg-push/decoders/event-0x2dc';
import { buildContext, type MsgPushContext } from '@snowluma/protocol/msg-push/context';
import { IdentityService } from '@snowluma/protocol/identity-service';
import type { GroupMsgEmojiLikeEvent, QQEventVariant } from '@snowluma/protocol/events';
import { convertGroupMsgEmojiLike } from '../src/event-converter/to-notice';
import { GROUP_MESSAGE_EVENT, hashMessageIdInt32 } from '../src/message-id';
import { formatEvent } from '@snowluma/protocol/format';
import { subscribeLogs, type LogEntry } from '@snowluma/common/logger';

const SELF_UIN = '10001';
const GROUP_ID = 123456789;

function makeIdentity(): IdentityService {
    return IdentityService.memory(SELF_UIN);
}

/** Build the raw bytes QQ would push into ctx.content for subType=16:
 *  a 7-byte magic prefix followed by an encoded GroupReactNotify. */
function buildReactContent(notify: Record<string, unknown>): Uint8Array {
    const prefix = new Uint8Array([0, 0, 0, 0, 0, 0, 0]);
    const body = protobuf_encode<GroupReactNotify>(notify as GroupReactNotify);
    const out = new Uint8Array(prefix.length + body.length);
    out.set(prefix, 0);
    out.set(body, prefix.length);
    return out;
}

function encodeVarint(value: bigint): number[] {
    const out: number[] = [];
    let remaining = value;

    do {
        let byte = Number(remaining & 0x7fn);
        remaining >>= 7n;

        if (remaining !== 0n) {
            byte |= 0x80;
        }

        out.push(byte);
    } while (remaining !== 0n);

    return out;
}

function encodeSignedInt32Varint(value: number): number[] {
    return encodeVarint(BigInt.asUintN(64, BigInt(value | 0)));
}

function varintField(fieldNumber: number, value: number[] | bigint): number[] {
    const bytes = Array.isArray(value) ? value : encodeVarint(value);
    return [...encodeVarint(BigInt(fieldNumber << 3)), ...bytes];
}

function messageField(fieldNumber: number, payload: number[] | Uint8Array): number[] {
    const bytes = Array.from(payload);
    return [
        ...encodeVarint(BigInt((fieldNumber << 3) | 2)),
        ...encodeVarint(BigInt(bytes.length)),
        ...bytes,
    ];
}

function buildPushPacket(
    content: Uint8Array,
    options: { sequence: number[] | bigint; msgId: number[] | bigint },
): PacketInfo {
    const contentHead = [
        ...varintField(1, 732n),
        ...varintField(2, 16n),
        ...varintField(4, options.msgId),
        ...varintField(5, options.sequence),
        ...varintField(6, 1735000000n),
    ];
    const body = messageField(2, content);
    const message = [...messageField(2, contentHead), ...messageField(3, body)];

    return {
        pid: 1,
        uin: SELF_UIN,
        serviceCmd: MSG_PUSH_CMD,
        seqId: 1,
        retCode: 0,
        fromClient: false,
        body: Uint8Array.from(messageField(1, message)),
    };
}

function makeCtx(content: Uint8Array, identity = makeIdentity()): MsgPushContext {
    return {
        head: { msgType: 732, subType: 16, sequence: 0, timestamp: 1735000000, msgId: 0 },
        fromUin: 0,
        fromUid: '',
        selfUin: Number(SELF_UIN),
        content,
        body: undefined,
        responseHead: undefined,
        identity,
    };
}

describe('decodeEvent0x2DC subType=16 — GroupMsgEmojiLike', () => {
    it('decodes a full PushMsg whose envelope sequence uses a sign-extended 10-byte varint', () => {
        const content = buildReactContent({
            groupUin: BigInt(GROUP_ID),
            field13: 35,
            groupReactionData: {
                data: {
                    data: {
                        groupReactionTarget: { seq: 4242n },
                        groupReactionDataContent: {
                            code: '76',
                            count: 1,
                            operatorUid: 'u_operator_xxx',
                            type: 1,
                        },
                    },
                },
            },
        });
        const packet = buildPushPacket(content, {
            msgId: 123n,
            sequence: encodeSignedInt32Varint(-2),
        });

        const [event] = parseMsgPush(packet, makeIdentity()) as GroupMsgEmojiLikeEvent[];
        expect(event).toMatchObject({
            kind: 'group_msg_emoji_like',
            groupId: GROUP_ID,
            msgSeq: 4242,
            emojiId: '76',
        });
    });

    it('decodes a full PushMsg whose envelope sequence carries high uint32 bits', () => {
        const content = buildReactContent({
            groupUin: BigInt(GROUP_ID),
            field13: 35,
            groupReactionData: {
                data: {
                    data: {
                        groupReactionTarget: { seq: 4242n },
                        groupReactionDataContent: {
                            code: '76',
                            count: 1,
                            operatorUid: 'u_operator_xxx',
                            type: 1,
                        },
                    },
                },
            },
        });
        const packet = buildPushPacket(content, {
            msgId: 123n,
            sequence: 0x1_0000_0007n,
        });

        const [event] = parseMsgPush(packet, makeIdentity()) as GroupMsgEmojiLikeEvent[];
        expect(event).toMatchObject({
            kind: 'group_msg_emoji_like',
            groupId: GROUP_ID,
            msgSeq: 4242,
            emojiId: '76',
        });
        expect(buildContext(packet, makeIdentity())?.head.sequence).toBe(7);
    });

    it('accepts a sign-extended negative ContentHead field 4 without losing its low 32 bits', () => {
        const packet = buildPushPacket(new Uint8Array(0), {
            msgId: encodeSignedInt32Varint(-1),
            sequence: 7n,
        });
        const ctx = buildContext(packet, makeIdentity());

        expect(ctx?.head.msgId).toBe(0xffffffff);
        expect(ctx?.head.sequence).toBe(7);
    });

    it('decodes a field13=35 react add into a GroupMsgEmojiLikeEvent', () => {
        const content = buildReactContent({
            groupUin: BigInt(GROUP_ID),
            field13: 35,
            groupReactionData: {
                data: {
                    data: {
                        groupReactionTarget: { seq: 4242n },
                        groupReactionDataContent: {
                            code: '76',
                            count: 1,
                            operatorUid: 'u_operator_xxx',
                            type: 1, // add
                        },
                    },
                },
            },
        });

        const [event] = decodeEvent0x2DC(makeCtx(content)) as GroupMsgEmojiLikeEvent[];
        expect(event).toBeDefined();
        expect(event.kind).toBe('group_msg_emoji_like');
        expect(event.groupId).toBe(GROUP_ID);
        expect(event.operatorUid).toBe('u_operator_xxx');
        expect(event.emojiId).toBe('76');
        expect(event.msgSeq).toBe(4242);
        expect(event.count).toBe(1);
        expect(event.isAdd).toBe(true);
    });

    it('decodes type=2 as react remove (isAdd=false)', () => {
        const content = buildReactContent({
            groupUin: BigInt(GROUP_ID),
            field13: 35,
            groupReactionData: {
                data: {
                    data: {
                        groupReactionTarget: { seq: 1n },
                        groupReactionDataContent: {
                            code: '⭐',
                            count: 1,
                            operatorUid: 'u_x',
                            type: 2,
                        },
                    },
                },
            },
        });

        const [event] = decodeEvent0x2DC(makeCtx(content)) as GroupMsgEmojiLikeEvent[];
        expect(event.isAdd).toBe(false);
        expect(event.emojiId).toBe('⭐');
    });

    it('drops the packet and logs to MsgPush.Unknown when field13 is not 35', () => {
        const captured: LogEntry[] = [];
        const unsub = subscribeLogs((e) => captured.push(e));

        const content = buildReactContent({
            groupUin: BigInt(GROUP_ID),
            field13: 99, // not 35
            groupReactionData: {
                data: { data: { groupReactionDataContent: { code: 'x', operatorUid: 'u_y' } } },
            },
        });

        const result = decodeEvent0x2DC(makeCtx(content));
        unsub();

        expect(result).toHaveLength(0);
        const unknown = captured.find(
            (e) => e.scope === 'MsgPush.Unknown' && /field13=99/.test(e.message),
        );
        expect(unknown).toBeDefined();
    });

    it('returns empty when content is shorter than the prefix length', () => {
        const tooShort = new Uint8Array([1, 2, 3]); // < 7 bytes
        expect(decodeEvent0x2DC(makeCtx(tooShort))).toEqual([]);
    });
});

describe('convertGroupMsgEmojiLike — OneBot notice shape', () => {
    const baseEvent: GroupMsgEmojiLikeEvent = {
        kind: 'group_msg_emoji_like',
        time: 1735000000,
        selfUin: 10001,
        groupId: 123456789,
        operatorUin: 99999,
        operatorUid: 'u_x',
        msgSeq: 4242,
        emojiId: '76',
        count: 1,
        isAdd: true,
    };

    // Real production wiring puts a hashMessageIdInt32-based resolver
    // on the ctx; mirror that so message_id is the same value the
    // bot would have minted for the original message.
    const ctx = {
        selfId: 10001,
        imageUrlResolver: null,
        mediaUrlResolver: null,
        messageIdResolver: (
            _isGroup: boolean,
            sessionId: number,
            sequence: number,
            eventName: string,
        ) => hashMessageIdInt32(sequence, sessionId, eventName),
        mediaSegmentSink: null,
    } as never;

    it('produces a group_msg_emoji_like notice with sub_type=add and resolved message_id', async () => {
        const out = await convertGroupMsgEmojiLike(ctx, baseEvent);
        expect(out.post_type).toBe('notice');
        expect(out.notice_type).toBe('group_msg_emoji_like');
        expect(out.sub_type).toBe('add');
        expect(out.group_id).toBe(123456789);
        expect(out.user_id).toBe(99999);
        expect(out.operator_id).toBe(99999);
        expect(out.message_seq).toBe(4242);
        expect(out.message_id).toBe(hashMessageIdInt32(4242, 123456789, GROUP_MESSAGE_EVENT));
        expect(out.likes).toEqual([{ emoji_id: '76', count: 1 }]);
    });

    it('flips sub_type to remove when isAdd is false', async () => {
        const out = await convertGroupMsgEmojiLike(ctx, { ...baseEvent, isAdd: false });
        expect(out.sub_type).toBe('remove');
    });
});

describe('formatEvent — group_msg_emoji_like', () => {
    let savedLevel: string | undefined;
    beforeEach(() => {
        savedLevel = process.env.SNOWLUMA_LOG_LEVEL;
    });
    afterEach(() => {
        if (savedLevel === undefined) {
            delete process.env.SNOWLUMA_LOG_LEVEL;
        } else {
            process.env.SNOWLUMA_LOG_LEVEL = savedLevel;
        }
    });

    it('renders a one-line summary with group, operator and emoji id', () => {
        const identity = IdentityService.memory(SELF_UIN);
        identity.rememberGroups([
            {
                groupId: GROUP_ID,
                groupName: 'TestGroup',
                remark: '',
                memberCount: 1,
                memberMax: 500,
                members: new Map(),
            },
        ]);
        identity.rememberGroupMembers(GROUP_ID, [
            {
                uin: 99999,
                uid: 'u_x',
                nickname: 'Alice',
                card: '',
                role: 'member',
                level: 0,
                title: '',
                joinTime: 0,
                lastSentTime: 0,
                shutUpTime: 0,
            },
        ]);

        const event: QQEventVariant = {
            kind: 'group_msg_emoji_like',
            time: 0,
            selfUin: Number(SELF_UIN),
            groupId: GROUP_ID,
            operatorUin: 99999,
            operatorUid: 'u_x',
            msgSeq: 100,
            emojiId: '76',
            count: 1,
            isAdd: true,
        };

        const line = formatEvent(identity, event);
        expect(line).toBeDefined();
        expect(line).toContain('TestGroup');
        expect(line).toContain('Alice');
        expect(line).toContain('[76]');
        expect(line).toContain('msgSeq=100');
    });
});