import { protectRoute } from '~~/server/utils/auth';
import { registerPendingGeneration } from '~~/server/utils/generation';
import type { GenerateRequestBody } from '~~/server/types/chat';

export default defineEventHandler(async (event) => {
    await protectRoute(event);

    const body = await readBody(event) as GenerateRequestBody;
    const { topicId, messages } = body;

    if (!topicId || !messages) {
        throw createError({
            statusCode: 400,
            statusMessage: 'Missing required fields: topicId and messages'
        });
    }

    if (messages.length === 0) {
        throw createError({
            statusCode: 400,
            statusMessage: 'Messages array cannot be empty'
        });
    }

    const generationId = `gen_${Date.now()}_${Math.random().toString(36).substring(2, 9)}`;

    registerPendingGeneration(event.context.user.id, generationId, topicId, messages);

    return {
        generationId,
        status: 'pending'
    };
});