feat(llm): provider factory with per-provider default base URLs

internal/llm/new.go

@@ -0,0 +1,40 @@
+package llm
+
+import (
+	"fmt"
+	"net/http"
+
+	"github.com/lukaszraczylo/captcha-solver-mcp/internal/config"
+)
+
+// New constructs the configured provider Client.
+func New(cfg config.Config) (Client, error) {
+	hc := &http.Client{Timeout: cfg.Timeout}
+	switch cfg.Provider {
+	case "anthropic":
+		base := cfg.BaseURL
+		if base == "" {
+			base = "https://api.anthropic.com"
+		}
+		return &anthropicClient{http: hc, base: base, key: cfg.APIKey, model: cfg.Model, maxTokens: cfg.MaxTokens}, nil
+	case "openai":
+		base := cfg.BaseURL
+		if base == "" {
+			base = "https://api.openai.com"
+		}
+		return &openAIClient{http: hc, base: base, key: cfg.APIKey, model: cfg.Model, audioModel: cfg.AudioModel, maxTokens: cfg.MaxTokens}, nil
+	case "openai-compatible":
+		if cfg.BaseURL == "" {
+			return nil, fmt.Errorf("openai-compatible requires CAPTCHA_LLM_BASE_URL")
+		}
+		return &openAIClient{http: hc, base: cfg.BaseURL, key: cfg.APIKey, model: cfg.Model, audioModel: cfg.AudioModel, maxTokens: cfg.MaxTokens}, nil
+	case "gemini":
+		base := cfg.BaseURL
+		if base == "" {
+			base = "https://generativelanguage.googleapis.com"
+		}
+		return &geminiClient{http: hc, base: base, key: cfg.APIKey, model: cfg.Model, audioModel: cfg.AudioModel, maxTokens: cfg.MaxTokens}, nil
+	default:
+		return nil, fmt.Errorf("unknown provider %q", cfg.Provider)
+	}
+}