/**
 * GET  /api/v1/settings/embedding — retrieve embedding settings
 * POST /api/v1/settings/embedding — update active embedding settings
 * PUT  /api/v1/settings/embedding — alias for POST
 */

import { json } from '@sveltejs/kit';
import type { RequestHandler } from './$types';
import type { EmbeddingSettingsUpdateDto } from '$lib/dtos/embedding-settings.js';
import { getClient } from '$lib/server/db/client';
import { EmbeddingSettingsDtoMapper } from '$lib/server/mappers/embedding-settings.dto.mapper.js';
import { EmbeddingSettingsService } from '$lib/server/services/embedding-settings.service.js';
import { handleServiceError, InvalidInputError } from '$lib/server/utils/validation';

// ---------------------------------------------------------------------------
// GET — Return embedding settings
// ---------------------------------------------------------------------------

export const GET: RequestHandler = () => {
	try {
		const service = new EmbeddingSettingsService(getClient());
		return json(EmbeddingSettingsDtoMapper.toDto(service.getSettings()));
	} catch (err) {
		return handleServiceError(err);
	}
};

// ---------------------------------------------------------------------------
// POST/PUT — Create or update a profile
// ---------------------------------------------------------------------------

async function upsertSettings(body: unknown) {
	if (typeof body !== 'object' || body === null) {
		throw new InvalidInputError('Request body must be a JSON object');
	}

	const service = new EmbeddingSettingsService(getClient());
	const settings = await service.updateSettings(body as EmbeddingSettingsUpdateDto);
	return EmbeddingSettingsDtoMapper.toDto(settings);
}

export const POST: RequestHandler = async ({ request }) => {
	try {
		const body = await request.json();
		return json(await upsertSettings(body));
	} catch (err) {
		return handleServiceError(err);
	}
};

export const PUT: RequestHandler = POST;