package config

import "testing"

func TestEnvNameMapping(t *testing.T) {
	e := envSource{prefix: "GADFLY_"}
	cases := map[string]string{
		"models":                        "GADFLY_MODELS",
		"model.tier.fast.max_steps":     "GADFLY_MODEL_TIER_FAST_MAX_STEPS",
		"provider-concurrency":          "GADFLY_PROVIDER_CONCURRENCY",
		"a/b.c":                         "GADFLY_A_B_C",
	}
	for key, want := range cases {
		if got := e.envName(key); got != want {
			t.Errorf("envName(%q) = %q, want %q", key, got, want)
		}
	}
}

func TestEnvReadsAndDefaults(t *testing.T) {
	t.Setenv("EX_MODELS", "a,b,c")
	t.Setenv("EX_MAX", "12")
	t.Setenv("EX_RATIO", "0.7")
	t.Setenv("EX_ON", "true")
	t.Setenv("EX_BLANK", "")
	s := Env("EX_")

	if got := s.String("models", "def"); got != "a,b,c" {
		t.Errorf("String = %q", got)
	}
	if got := s.String("blank", "def"); got != "def" {
		t.Errorf("blank String should fall back to default, got %q", got)
	}
	if got := s.String("missing", "def"); got != "def" {
		t.Errorf("missing String = %q", got)
	}
	if got := s.Int("max", 1); got != 12 {
		t.Errorf("Int = %d", got)
	}
	if got := s.Int("models", 1); got != 1 {
		t.Errorf("unparseable Int should default, got %d", got)
	}
	if got := s.Float("ratio", 1); got != 0.7 {
		t.Errorf("Float = %v", got)
	}
	if got := s.Bool("on", false); got != true {
		t.Errorf("Bool = %v", got)
	}
}

func TestNilSafeHelpers(t *testing.T) {
	var s Source // nil
	if String(s, "k", "d") != "d" || Int(s, "k", 7) != 7 || Float(s, "k", 1.5) != 1.5 || !Bool(s, "k", true) {
		t.Fatal("nil Source helpers must return defaults")
	}
}