import { protectRoute } from '~~/server/utils/auth';
import { createPendingGeneration } 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, regeneratesFrom } = 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'
        });
    }

    try {
        const generationId = await createPendingGeneration(event.context.user.id, topicId, messages, regeneratesFrom);

        return {
            generationId,
            status: 'pending',
            regeneratesFrom
        };
    } catch (error) {
        console.error('Failed to create generation:', error);
        throw createError({
            statusCode: 500,
            statusMessage: 'Failed to create generation'
        });
    }
});