package config

import (
	"testing"
)

func TestLoadDefaults(t *testing.T) {
	t.Setenv("MESSENGER_HTTP_ADDR", "")
	t.Setenv("MESSENGER_ENV", "")

	cfg, err := Load()
	if err != nil {
		t.Fatalf("Load() error = %v", err)
	}
	if cfg.HTTPAddr != ":8080" {
		t.Errorf("HTTPAddr = %q, want %q", cfg.HTTPAddr, ":8080")
	}
	if cfg.Environment != "development" {
		t.Errorf("Environment = %q, want development", cfg.Environment)
	}
}

func TestLoadFromEnv(t *testing.T) {
	t.Setenv("MESSENGER_HTTP_ADDR", ":9000")
	t.Setenv("MESSENGER_ENV", "production")
	t.Setenv("MESSENGER_ALLOWED_ORIGINS", "https://a.example, https://b.example")
	t.Setenv("MESSENGER_JWT_SECRET", "prod-secret-at-least-32-chars-long!!")

	cfg, err := Load()
	if err != nil {
		t.Fatalf("Load() error = %v", err)
	}
	if cfg.HTTPAddr != ":9000" {
		t.Errorf("HTTPAddr = %q, want :9000", cfg.HTTPAddr)
	}
	if cfg.Environment != "production" {
		t.Errorf("Environment = %q, want production", cfg.Environment)
	}
	if len(cfg.AllowedOrigins) != 2 || cfg.AllowedOrigins[1] != "https://b.example" {
		t.Errorf("AllowedOrigins = %v, want [https://a.example https://b.example]", cfg.AllowedOrigins)
	}
	if cfg.DatabaseURL == "" {
		t.Error("DatabaseURL = empty, want default DSN")
	}
}

func TestLoadInvalidEnv(t *testing.T) {
	t.Setenv("MESSENGER_ENV", "nope")

	if _, err := Load(); err == nil {
		t.Fatal("Load() error = nil, want validation error")
	}
}

func TestLoadRequiresJWTSecretInProduction(t *testing.T) {
	t.Setenv("MESSENGER_ENV", "production")
	t.Setenv("MESSENGER_JWT_SECRET", "")

	if _, err := Load(); err == nil {
		t.Fatal("Load() error = nil, want missing JWT secret error")
	}
}