// Send-chain micro-benchmark (RoadMap #5).
//
// Measured paths:
//   1. `parseMessage` — OneBot input (CQ string / segment array) →
//      MessageElement[]. The parse cost only.
//   2. `buildSendElems` — MessageElement[] → wire-proto Elem[]. The
//      transform cost (skipped: image/video/record because they hit
//      OIDB upload + need a Bridge; we only measure text-family).
//   3. `messageStore.storeMeta` — single SQLite write per send. The
//      per-send DB cost.
//   4. `messageStore.storeEvent` — synthetic self-sent event store.
//      Bigger DB write (includes JSON payload).
//
// Run via:  pnpm -F @snowluma/onebot bench
//
// Output is `tinybench` ops/sec. Run before AND after a perf commit.

import fs from 'node:fs';
import os from 'node:os';
import path from 'node:path';
import { bench, describe } from 'vitest';
import { parseMessage } from '../src/message-parser';
import { MessageStore } from '../src/message-store';
import type { JsonObject } from '@snowluma/common/json';

// ─── parseMessage inputs ───

const CQ_TEXT = 'hello world from bench';
const CQ_MIXED = '[CQ:at,qq=123456] hello [CQ:face,id=76] world [CQ:reply,id=4242]';

const SEGMENTS_TEXT = [{ type: 'text', data: { text: 'hello world from bench' } }];
const SEGMENTS_MIXED = [
    { type: 'at', data: { qq: '123456' } },
    { type: 'text', data: { text: ' hello ' } },
    { type: 'face', data: { id: 76 } },
    { type: 'text', data: { text: ' world ' } },
    { type: 'reply', data: { id: 4242 } },
];

// ─── messageStore setup ───

function makeMessageStore(): MessageStore {
    const dir = fs.mkdtempSync(path.join(os.tmpdir(), 'snowluma-bench-send-'));
    return new MessageStore(path.join(dir, 'messages.db'));
}

const store = makeMessageStore();

const META = {
    isGroup: true,
    targetId: 123456789,
    sequence: 1000,
    eventName: 'message.group',
    clientSequence: 12345,
    random: 67890,
    timestamp: 1710000000,
};

const SAMPLE_EVENT: JsonObject = {
    time: 1710000000,
    self_id: 10001,
    post_type: 'message_sent',
    message_type: 'group',
    sub_type: 'normal',
    message_id: 999999,
    message_seq: 1000,
    group_id: 123456789,
    user_id: 10001,
    message: [{ type: 'text', data: { text: 'hello world' } }],
    raw_message: 'hello world',
    font: 0,
    sender: { user_id: 10001, nickname: '', sex: 'unknown', age: 0 },
};

// ─── Benches ───

describe('parseMessage — OneBot input → MessageElement[]', () => {
    bench('CQ string (text only)', async () => {
        await parseMessage(CQ_TEXT, false);
    });
    bench('CQ string (mixed 4 segments)', async () => {
        await parseMessage(CQ_MIXED, false);
    });
    bench('segment array (text only)', async () => {
        await parseMessage(SEGMENTS_TEXT as any, false);
    });
    bench('segment array (5 segments)', async () => {
        await parseMessage(SEGMENTS_MIXED as any, false);
    });
});

describe('messageStore — SQLite writes per send', () => {
    // Use a monotonically-incrementing messageId so each call hits the
    // upsert path uniquely; otherwise we'd be testing the ON-CONFLICT
    // branch which is a different cost profile.
    let id1 = 100_000;
    let id2 = 200_000;
    bench('storeMeta', async () => {
        await store.storeMeta(id1++, META);
    });
    bench('storeEvent (JSON payload ~250 bytes)', async () => {
        await store.storeEvent(
            id2++,
            true,
            META.targetId,
            META.sequence,
            META.eventName,
            SAMPLE_EVENT,
        );
    });
});

describe('messageStore — read paths', async () => {
    // Seed a small set of records so findEvent / findMeta have hits.
    for (let i = 0; i < 100; i++) {
        await store.storeMeta(500_000 + i, META);
        await store.storeEvent(
            600_000 + i,
            true,
            META.targetId,
            META.sequence + i,
            META.eventName,
            SAMPLE_EVENT,
        );
    }

    bench('findMeta (hit)', async () => {
        await store.findMeta(500_050);
    });
    bench('findMeta (miss)', async () => {
        await store.findMeta(9_999_999);
    });
    bench('findEvent (hit, JSON.parse on read)', async () => {
        await store.findEvent(600_050);
    });
});