initialize paraclub-ai-mailer project with core components and configuration

internal/ai/ai.go

@@ -0,0 +1,99 @@
+package ai
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"paraclub-ai-mailer/config"
+)
+
+type AI struct {
+	config config.AIConfig
+	client *http.Client
+}
+
+type OpenRouterRequest struct {
+	Model       string    `json:"model"`
+	Messages    []Message `json:"messages"`
+	Temperature float32   `json:"temperature"`
+	MaxTokens   int       `json:"max_tokens"`
+}
+
+type Message struct {
+	Role    string `json:"role"`
+	Content string `json:"content"`
+}
+
+type OpenRouterResponse struct {
+	Choices []struct {
+		Message struct {
+			Content string `json:"content"`
+		} `json:"message"`
+	} `json:"choices"`
+}
+
+func New(cfg config.AIConfig) *AI {
+	return &AI{
+		config: cfg,
+		client: &http.Client{},
+	}
+}
+
+func (a *AI) GenerateReply(emailContent string, contextContent map[string]string) (string, error) {
+	// Prepare context from all URLs
+	var context string
+	for url, content := range contextContent {
+		context += fmt.Sprintf("\nContext from %s:\n%s\n", url, content)
+	}
+
+	// Prepare the system message and user message
+	systemMsg := "You are a helpful assistant. Use the provided context to help answer the email professionally and accurately."
+	userMsg := fmt.Sprintf("Using the following context:\n%s\n\nPlease generate a reply for this email:\n%s", context, emailContent)
+
+	messages := []Message{
+		{Role: "system", Content: systemMsg},
+		{Role: "user", Content: userMsg},
+	}
+
+	reqBody := OpenRouterRequest{
+		Model:       a.config.Model,
+		Messages:    messages,
+		Temperature: a.config.Temperature,
+		MaxTokens:   a.config.MaxTokens,
+	}
+
+	jsonData, err := json.Marshal(reqBody)
+	if err != nil {
+		return "", err
+	}
+
+	req, err := http.NewRequest("POST", "https://openrouter.ai/api/v1/chat/completions", bytes.NewBuffer(jsonData))
+	if err != nil {
+		return "", err
+	}
+
+	req.Header.Set("Content-Type", "application/json")
+	req.Header.Set("Authorization", fmt.Sprintf("Bearer %s", a.config.OpenRouterAPIKey))
+
+	resp, err := a.client.Do(req)
+	if err != nil {
+		return "", err
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode != http.StatusOK {
+		return "", fmt.Errorf("OpenRouter API returned status code: %d", resp.StatusCode)
+	}
+
+	var result OpenRouterResponse
+	if err := json.NewDecoder(resp.Body).Decode(&result); err != nil {
+		return "", err
+	}
+
+	if len(result.Choices) == 0 {
+		return "", fmt.Errorf("no response generated")
+	}
+
+	return result.Choices[0].Message.Content, nil
+}