import { describe, expect, it, vi } from 'vitest';
import { sendPrivateMessage } from '../src/modules/message-actions';
import { TempSessionStore, TEMP_SESSION_TTL_MS } from '../src/temp-session-store';
import type { OneBotInstanceContext } from '../src/instance-context';

// The passive gate lives at the very top of sendPrivateMessage, before any
// message parsing or network call. These tests exercise that gate directly:
// a temp reply (tempGroupId set) into a session the peer never opened MUST be
// refused, without ever reaching the send path. This is the structural
// guarantee that the public build cannot initiate a temp session.

function refWith(store: TempSessionStore): OneBotInstanceContext {
    const sendGroupTempMessage = vi.fn();
    const sendPrivate = vi.fn();
    return {
        tempSessions: store,
        // If the gate ever let a send through, these would be called — the tests
        // assert they are NOT for the refused case.
        bridge: { apis: { message: { sendGroupTempMessage, sendPrivate } } },
    } as unknown as OneBotInstanceContext;
}

describe('sendPrivateMessage temp-session gate (passive-only)', () => {
    it.each(['missing', 'other-user', 'other-group', 'expired'])(
        'refuses an image before parsing or uploading when the session is %s',
        async (state) => {
            const store = new TempSessionStore();

            if (state === 'other-user') {
                store.record(1002, 700);
            }

            if (state === 'other-group') {
                store.record(1001, 701);
            }

            if (state === 'expired') {
                store.record(1001, 700, Date.now() - TEMP_SESSION_TTL_MS);
            }

            const record = vi.spyOn(store, 'record');
            const ref = refWith(store);

            await expect(
                sendPrivateMessage(
                    ref,
                    1001,
                    [{ type: 'image', data: { file: 'https://must-not-fetch.invalid/image.png' } }],
                    false,
                    700,
                ),
            ).rejects.toThrow('no such temp session');

            expect(ref.bridge.apis.message.sendGroupTempMessage).not.toHaveBeenCalled();
            expect(ref.bridge.apis.message.sendPrivate).not.toHaveBeenCalled();
            expect(record).not.toHaveBeenCalled();
        },
    );

    it('refuses a temp reply to an unrecorded (user, group) and never sends', async () => {
        const store = new TempSessionStore();
        const ref = refWith(store);
        await expect(
            sendPrivateMessage(
                ref,
                1001,
                [{ type: 'text', data: { text: 'hi' } }],
                false,
                /* tempGroupId */ 700,
            ),
        ).rejects.toThrow(/passive-only|temp session/i);
        // The gate threw before any wire call.
        expect(
            (ref.bridge.apis.message as { sendGroupTempMessage: ReturnType<typeof vi.fn> })
                .sendGroupTempMessage,
        ).not.toHaveBeenCalled();
    });

    it('refuses when a DIFFERENT group is recorded (exact (user, group) match required)', async () => {
        const store = new TempSessionStore();
        store.record(1001, 701); // user opened a session from group 701, not 700
        const ref = refWith(store);
        await expect(
            sendPrivateMessage(ref, 1001, [{ type: 'text', data: { text: 'hi' } }], false, 700),
        ).rejects.toThrow(/passive-only|temp session/i);
    });

    it('rejects text + file before sending a partial temp-session message', async () => {
        const store = new TempSessionStore();
        store.record(1001, 700);
        const ref = refWith(store);

        await expect(
            sendPrivateMessage(
                ref,
                1001,
                [
                    { type: 'text', data: { text: 'must not be sent' } },
                    { type: 'file', data: { file_id: 'friend-file-id' } },
                ],
                false,
                700,
            ),
        ).rejects.toMatchObject({
            code: 'UNSENDABLE_TYPE',
            elementType: 'file',
        });

        expect(
            (ref.bridge.apis.message as { sendGroupTempMessage: ReturnType<typeof vi.fn> })
                .sendGroupTempMessage,
        ).not.toHaveBeenCalled();
    });
});