package backend

import (
	"testing"
)

func TestNewWithName_NoBackendErrors(t *testing.T) {
	_, err := newBackendFromConfig("", configFile{Backends: map[string]BackendConfig{}})
	if err == nil {
		t.Fatal("expected error when backend is unset")
	}
}

func TestNewBackendFromConfig_Ollama(t *testing.T) {
	b, err := newBackendFromConfig("ollama", configFile{Backends: map[string]BackendConfig{
		"ollama": {Host: "http://localhost:11434"},
	}})
	if err != nil {
		t.Fatal(err)
	}
	if b.Name() != "ollama" {
		t.Errorf("name = %q", b.Name())
	}
}

func TestNewBackendFromConfig_OpenAI(t *testing.T) {
	b, err := newBackendFromConfig("openai", configFile{Backends: map[string]BackendConfig{
		"openai": {URL: "https://api.openai.com", Key: "sk-test"},
	}})
	if err != nil {
		t.Fatal(err)
	}
	if b.Name() != "openai" {
		t.Errorf("name = %q", b.Name())
	}
}

func TestNewBackendFromConfig_AnthropicMissingKey(t *testing.T) {
	_, err := newBackendFromConfig("anthropic", configFile{Backends: map[string]BackendConfig{
		"anthropic": {},
	}})
	if err == nil {
		t.Fatal("expected error for missing key")
	}
}

func TestNewBackendFromConfig_Unknown(t *testing.T) {
	_, err := newBackendFromConfig("bogus", configFile{Backends: map[string]BackendConfig{}})
	if err == nil {
		t.Fatal("expected error for unknown backend")
	}
}

func TestNewOllama_InvalidURL(t *testing.T) {
	_, err := NewOllama("://bad")
	if err == nil {
		t.Fatal("expected error for invalid URL")
	}
}

func TestNewOpenAI_InvalidURL(t *testing.T) {
	_, err := NewOpenAI("openai", "://bad", "k")
	if err == nil {
		t.Fatal("expected error for invalid URL")
	}
}

func TestBackends(t *testing.T) {
	bs := Backends()
	if len(bs) != 7 {
		t.Fatalf("len = %d; want 7", len(bs))
	}
	want := map[string]bool{"ollama": true, "openai": true, "openrouter": true, "anthropic": true, "copilot": true, "kiro": true, "gemini": true}
	for _, b := range bs {
		if !want[b] {
			t.Errorf("unexpected backend %q", b)
		}
	}
}