package config

import (
	"os"
	"path/filepath"
	"testing"
)

func load(t *testing.T, yaml string) (Config, error) {
	t.Helper()
	t.Helper()
	p := filepath.Join(t.TempDir(), "c.yaml")
	os.WriteFile(p, []byte("auth_token: aaaaaaaaaaaaaaaaaaaa\n"+yaml), 0o600)
	return Load(p)
}

func TestPresetDahl(t *testing.T) {
	t.Setenv("DAHL_API_KEY", "dahl_test")
	c, err := load(t, "llm:\n  provider: dahl\n")
	if err != nil {
		t.Fatal(err)
	}
	if c.LLM.BaseURL != "https://inference.dahl.global/v1" || c.LLM.Model != "MiniMaxAI/MiniMax-M2.7" || c.LLM.APIKey != "dahl_test" {
		t.Fatalf("%+v", c.LLM)
	}
}

func TestPresetGonkaRouterViaEnv(t *testing.T) {
	t.Setenv("BYTECLAW_LLM_PROVIDER", "GonkaRouter")
	t.Setenv("GONKAROUTER_API_KEY", "sk-g")
	c, err := load(t, "")
	if err != nil {
		t.Fatal(err)
	}
	if c.LLM.Provider != "gonkarouter" || c.LLM.BaseURL != "https://api.gonkarouter.io/v1" || c.LLM.Model != "MiniMaxAI/MiniMax-M2.7" || c.LLM.APIKey != "sk-g" {
		t.Fatalf("%+v", c.LLM)
	}
}

func TestPresetExplicitValuesWin(t *testing.T) {
	t.Setenv("GONKAROUTER_API_KEY", "from-env")
	c, err := load(t, "llm:\n  provider: gonkarouter\n  model: zai-org/GLM-5.3-Flash\n  api_key: explicit\n")
	if err != nil {
		t.Fatal(err)
	}
	if c.LLM.Model != "zai-org/GLM-5.3-Flash" || c.LLM.APIKey != "explicit" || c.LLM.BaseURL != "https://api.gonkarouter.io/v1" {
		t.Fatalf("%+v", c.LLM)
	}
}

func TestPresetDefaultIsOpenAI(t *testing.T) {
	c, err := load(t, "")
	if err != nil || c.LLM.Provider != "openai" || c.LLM.BaseURL != "https://api.openai.com/v1" {
		t.Fatalf("%+v %v", c.LLM, err)
	}
}

func TestPresetUnknownAndCustom(t *testing.T) {
	if _, err := load(t, "llm:\n  provider: nope\n"); err == nil {
		t.Fatal("unknown provider must fail")
	}
	if _, err := load(t, "llm:\n  provider: custom\n"); err == nil {
		t.Fatal("custom without base_url/model must fail validation")
	}
	c, err := load(t, "llm:\n  provider: custom\n  base_url: http://x/v1\n  model: m\n")
	if err != nil || c.LLM.BaseURL != "http://x/v1" {
		t.Fatalf("%+v %v", c.LLM, err)
	}
}

func TestAllPresetsComplete(t *testing.T) {
	for n, p := range Presets {
		if p.Name != n || p.BaseURL == "" || p.DefaultModel == "" || p.Source == "" {
			t.Errorf("incomplete preset %q: %+v", n, p)
		}
	}
}

// TestMain keeps tests hermetic when the developer shell has BYTECLAW_* or provider keys set.
func TestMain(m *testing.M) {
	for _, k := range []string{"BYTECLAW_LISTEN", "BYTECLAW_DATA_DIR", "BYTECLAW_WORKSPACE", "BYTECLAW_LLM_PROVIDER",
		"BYTECLAW_LLM_BASE_URL", "BYTECLAW_LLM_API_KEY", "BYTECLAW_LLM_MODEL", "BYTECLAW_ALLOWED_ORIGINS", "BYTECLAW_AUTH_TOKEN",
		"OPENAI_API_KEY", "OPENROUTER_API_KEY", "DAHL_API_KEY", "GONKAROUTER_API_KEY"} {
		os.Unsetenv(k)
	}
	os.Exit(m.Run())
}