import { createAnthropic } from '@ai-sdk/anthropic';
import { GatewayFetchError } from '~~/server/utils/ai-provider';
import { Err, Ok } from '~~/types/result';
import type { ProviderModule } from '.';
import { getModelData } from './helpers';

export default {
    id: 'anthropic',
    baseUrl: 'https://api.anthropic.com/v1',
    modelsEndpoint: '/models',

    createGateway({ apiKey, baseURL }) {
        if (apiKey === undefined) {
            return Err(GatewayFetchError.NoProviderApiKey);
        }

        return Ok({
            gateway: createAnthropic({ apiKey, baseURL }),
            streamTransformer: undefined,
            textTransformer: undefined,
        });
    },

    getAuthHeaders(apiKey) {
        return apiKey
            ? { 'x-api-key': apiKey, 'anthropic-version': '2023-06-01' }
            : {};
    },

    async fetchModels({ baseURL, apiKey, modelsDevData }) {
        const res = await fetch(`${baseURL}/models`, {
            method: 'GET',
            headers: {
                'x-api-key': `${apiKey}`,
                'anthropic-version': '2023-06-01',
            },
        });
        const data = await res.json();

        if (!res.ok) {
            throw createError({ statusCode: res.status, message: JSON.stringify(data) });
        }

        return data.data.map((model: any) => ({
            ...getModelData(model.id, 'anthropic', modelsDevData),
            id: model.id,
            name: model.display_name ?? model.id,
        }));
    },
} satisfies ProviderModule;