/**
 * @license
 *
 * Copyright 2024 Google LLC
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/**
 * @module /
 */

import { Genkit } from 'genkit';
import { GenkitPlugin, genkitPlugin } from 'genkit/plugin';
import { getDerivedParams } from './common/index.js';
import { PluginOptions } from './common/types.js';
import {
  SUPPORTED_EMBEDDER_MODELS,
  defineVertexAIEmbedder,
  multimodalEmbedding001,
  textEmbedding004,
  textEmbedding005,
  textEmbeddingGecko003,
  textEmbeddingGeckoMultilingual001,
  textMultilingualEmbedding002,
} from './embedder.js';
import {
  SUPPORTED_GEMINI_MODELS,
  defineGeminiKnownModel,
  defineGeminiModel,
  gemini,
  gemini10Pro,
  gemini15Flash,
  gemini15Pro,
  gemini20Flash,
  gemini20Flash001,
  gemini20FlashLite,
  gemini20FlashLitePreview0205,
  gemini20ProExp0205,
  gemini25ProExp0325,
  gemini25ProPreview0325,
  type GeminiConfig,
} from './gemini.js';
import {
  SUPPORTED_IMAGEN_MODELS,
  imagen2,
  imagen3,
  imagen3Fast,
  imagenModel,
} from './imagen.js';
export { type PluginOptions } from './common/types.js';
export {
  gemini,
  gemini10Pro,
  gemini15Flash,
  gemini15Pro,
  gemini20Flash,
  gemini20Flash001,
  gemini20FlashLite,
  gemini20FlashLitePreview0205,
  gemini20ProExp0205,
  gemini25ProExp0325,
  gemini25ProPreview0325,
  imagen2,
  imagen3,
  imagen3Fast,
  multimodalEmbedding001,
  textEmbedding004,
  textEmbedding005,
  textEmbeddingGecko003,
  textEmbeddingGeckoMultilingual001,
  textMultilingualEmbedding002,
  type GeminiConfig,
};

/**
 * Add Google Cloud Vertex AI to Genkit. Includes Gemini and Imagen models and text embedder.
 */
export function vertexAI(options?: PluginOptions): GenkitPlugin {
  return genkitPlugin('vertexai', async (ai: Genkit) => {
    const { projectId, location, vertexClientFactory, authClient } =
      await getDerivedParams(options);

    Object.keys(SUPPORTED_IMAGEN_MODELS).map((name) =>
      imagenModel(ai, name, authClient, { projectId, location })
    );
    Object.keys(SUPPORTED_GEMINI_MODELS).map((name) =>
      defineGeminiKnownModel(
        ai,
        name,
        vertexClientFactory,
        {
          projectId,
          location,
        },
        options?.experimental_debugTraces
      )
    );
    if (options?.models) {
      for (const modelOrRef of options?.models) {
        const modelName =
          typeof modelOrRef === 'string'
            ? modelOrRef
            : // strip out the `vertexai/` prefix
              modelOrRef.name.split('/')[1];
        const modelRef =
          typeof modelOrRef === 'string' ? gemini(modelOrRef) : modelOrRef;
        defineGeminiModel({
          ai,
          modelName: modelRef.name,
          version: modelName,
          modelInfo: modelRef.info,
          vertexClientFactory,
          options: {
            projectId,
            location,
          },
          debugTraces: options.experimental_debugTraces,
        });
      }
    }

    Object.keys(SUPPORTED_EMBEDDER_MODELS).map((name) =>
      defineVertexAIEmbedder(ai, name, authClient, { projectId, location })
    );
  });
}

export default vertexAI;