import type { LanguageModel } from 'ai';
import { BaseProvider, getOpenAILikeModel } from '~/lib/modules/llm/base-provider';
import type { ModelInfo } from '~/lib/modules/llm/types';
import type { IProviderSetting } from '~/types/model';

export default class OpenAILikeProvider extends BaseProvider {
  name = 'OpenAILike';
  getApiKeyLink = undefined;

  config = {
    baseUrlKey: 'OPENAI_LIKE_API_BASE_URL',
    apiTokenKey: 'OPENAI_LIKE_API_KEY',
  };

  staticModels: ModelInfo[] = [];

  async getDynamicModels(apiKeys?: Record<string, string>, settings?: IProviderSetting): Promise<ModelInfo[]> {
    const { baseUrl, apiKey } = this.getProviderBaseUrlAndKey({
      apiKeys,
      providerSettings: settings,
      defaultBaseUrlKey: 'OPENAI_LIKE_API_BASE_URL',
      defaultApiTokenKey: 'OPENAI_LIKE_API_KEY',
    });

    if (!baseUrl || !apiKey) {
      return [];
    }

    const response = await fetch(`${baseUrl}/models`, {
      headers: {
        Authorization: `Bearer ${apiKey}`,
      },
    });

    const res = (await response.json()) as any;

    return res.data.map((model: any) => ({
      name: model.id,
      label: model.id,
      provider: this.name,
      maxTokenAllowed: 8000,
    }));
  }

  getModelInstance(options: {
    model: string;
    apiKeys?: Record<string, string>;
    providerSettings?: Record<string, IProviderSetting>;
  }): LanguageModel {
    const { model, apiKeys, providerSettings } = options;

    const { baseUrl, apiKey } = this.getProviderBaseUrlAndKey({
      apiKeys,
      providerSettings: providerSettings?.[this.name],
      defaultBaseUrlKey: 'OPENAI_LIKE_API_BASE_URL',
      defaultApiTokenKey: 'OPENAI_LIKE_API_KEY',
    });

    if (!baseUrl || !apiKey) {
      throw new Error(`Missing configuration for ${this.name} provider`);
    }

    return getOpenAILikeModel(baseUrl, apiKey, model);
  }
}