package ai

import (
	"context"
	"fmt"

	"github.com/sashabaranov/go-openai"
)

type GroqClient struct {
	client *openai.Client
	config GroqConfig
}

type GroqConfig struct {
	APIKey      string
	BaseURL     string
	DefaultModel string
}

type CompletionRequest struct {
	Model       string
	Prompt      string
	Temperature float32
	MaxTokens   int
}

type CompletionResponse struct {
	Text          string
	Model         string
	PromptTokens  int
	CompletionTokens int
	TotalTokens   int
}

func NewGroqClient(config GroqConfig) *GroqClient {
	if config.BaseURL == "" {
		config.BaseURL = "https://api.groq.com/openai/v1"
	}
	
	clientConfig := openai.DefaultConfig(config.APIKey)
	clientConfig.BaseURL = config.BaseURL
	
	return &GroqClient{
		client: openai.NewClientWithConfig(clientConfig),
		config: config,
	}
}

func (g *GroqClient) TestConnection(ctx context.Context) error {
	// Test by listing available models
	_, err := g.client.ListModels(ctx)
	if err != nil {
		return fmt.Errorf("failed to connect to Groq API: %w", err)
	}
	return nil
}

func (g *GroqClient) GenerateCompletion(ctx context.Context, req CompletionRequest) (*CompletionResponse, error) {
	model := req.Model
	if model == "" {
		model = g.config.DefaultModel
	}
	if model == "" {
		model = "llama-3.1-8b-instant"
	}

	chatReq := openai.ChatCompletionRequest{
		Model: model,
		Messages: []openai.ChatCompletionMessage{
			{
				Role:    openai.ChatMessageRoleUser,
				Content: req.Prompt,
			},
		},
		Temperature: req.Temperature,
		MaxTokens:   req.MaxTokens,
	}

	resp, err := g.client.CreateChatCompletion(ctx, chatReq)
	if err != nil {
		return nil, fmt.Errorf("failed to generate completion: %w", err)
	}

	if len(resp.Choices) == 0 {
		return nil, fmt.Errorf("no completion choices returned")
	}

	return &CompletionResponse{
		Text:             resp.Choices[0].Message.Content,
		Model:            resp.Model,
		PromptTokens:     resp.Usage.PromptTokens,
		CompletionTokens: resp.Usage.CompletionTokens,
		TotalTokens:      resp.Usage.TotalTokens,
	}, nil
}

func (g *GroqClient) ListModels(ctx context.Context) ([]string, error) {
	models, err := g.client.ListModels(ctx)
	if err != nil {
		return nil, fmt.Errorf("failed to list models: %w", err)
	}

	var modelNames []string
	for _, model := range models.Models {
		modelNames = append(modelNames, model.ID)
	}
	
	return modelNames, nil
}