import { getLogLevel, setLogLevel, subscribeLogs, type LogEntry } from '@snowluma/common/logger';
import type { IdentityService } from '@snowluma/protocol/identity-service';
import type { MsgPushContext } from '@snowluma/protocol/msg-push/context';
import { PkgType } from '@snowluma/protocol/msg-push/enums';
import { MsgPushRegistry } from '@snowluma/protocol/msg-push/registry';
import { afterEach, describe, expect, it } from 'vitest';

const previousLogLevel = getLogLevel();

afterEach(() => {
    setLogLevel(previousLogLevel);
});

function context(msgType: number): MsgPushContext {
    return {
        head: {
            msgType,
            subType: 7,
            c2cCmd: 0,
            sequence: 88,
            ntMsgSeq: 0,
            timestamp: 1,
            msgId: 2,
        },
        fromUin: 20002,
        fromUid: 'u_peer',
        selfUin: 10001,
        content: new Uint8Array(0),
        body: undefined,
        responseHead: undefined,
        identity: {} as IdentityService,
        isHistorical: false,
    };
}

function traceMessages(entries: LogEntry[]): string[] {
    return entries.filter((entry) => entry.level === 'trace').map((entry) => entry.message);
}

describe('MsgPushRegistry TRACE branches', () => {
    it('records an unregistered decoder with its message identity', () => {
        const entries: LogEntry[] = [];
        setLogLevel('trace');
        const unsubscribe = subscribeLogs((entry) => entries.push(entry));

        try {
            const registry = new MsgPushRegistry();

            expect(registry.decode(context(9999))).toEqual([]);
            expect(traceMessages(entries)).toContain(
                'packet_branch branch=decoder_unregistered msgType=9999 subType=7 messageSeq=88',
            );
        } finally {
            unsubscribe();
        }
    });

    it('records a decoder exception before failing open', () => {
        const entries: LogEntry[] = [];
        setLogLevel('trace');
        const unsubscribe = subscribeLogs((entry) => entries.push(entry));

        try {
            const registry = new MsgPushRegistry();
            registry.register(PkgType.PrivateMessage, () => {
                throw new Error('fixture decode failed');
            });

            expect(registry.decode(context(PkgType.PrivateMessage))).toEqual([]);
            expect(traceMessages(entries)).toContain(
                'packet_branch branch=decoder_exception msgType=166 subType=7 messageSeq=88 error="fixture decode failed"',
            );
        } finally {
            unsubscribe();
        }
    });
});