import { createOpenAI } from '@ai-sdk/openai';
import type { LanguageModel } from 'ai';
import { BaseProvider } from '~/lib/modules/llm/base-provider';
import type { ModelInfo } from '~/lib/modules/llm/types';
import type { IProviderSetting } from '~/types/model';

export default class OpenAIProvider extends BaseProvider {
  name = 'OpenAI';
  getApiKeyLink = 'https://platform.openai.com/api-keys';

  staticModels: ModelInfo[] = [
    { name: 'gpt-4o', label: 'GPT-4o', provider: 'OpenAI', maxTokenAllowed: 8000 },
    { name: 'gpt-4o-mini', label: 'GPT-4o Mini', provider: 'OpenAI', maxTokenAllowed: 8000 },
    { name: 'gpt-4-turbo', label: 'GPT-4 Turbo', provider: 'OpenAI', maxTokenAllowed: 8000 },
    { name: 'gpt-4', label: 'GPT-4', provider: 'OpenAI', maxTokenAllowed: 8000 },
    { name: 'gpt-3.5-turbo', label: 'GPT-3.5 Turbo', provider: 'OpenAI', maxTokenAllowed: 8000 },
  ];

  async getDynamicModels(settings?: IProviderSetting): Promise<ModelInfo[]> {
    const { apiKey } = this.getProviderBaseUrlAndKey(settings);

    if (!apiKey) {
      throw `Missing Api Key configuration for ${this.name} provider`;
    }

    const response = await fetch(`https://api.openai.com/v1/models`, {
      headers: {
        Authorization: `Bearer ${apiKey}`,
      },
    });

    const res = (await response.json()) as any;
    const staticModelIds = this.staticModels.map((m) => m.name);

    const data = res.data.filter(
      (model: any) =>
        model.object === 'model' &&
        (model.id.startsWith('gpt-') || model.id.startsWith('o') || model.id.startsWith('chatgpt-')) &&
        !staticModelIds.includes(model.id),
    );

    return data.map((m: any) => ({
      name: m.id,
      label: `${m.id}`,
      provider: this.name,
      maxTokenAllowed: m.context_window || 32000,
    }));
  }

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

    const { apiKey } = this.getProviderBaseUrlAndKey(providerSettings?.[this.name]);

    if (!apiKey) {
      throw new Error(`Missing API key for ${this.name} provider`);
    }

    const openai = createOpenAI({
      apiKey,
    });

    return openai(model);
  }
}