package config

import (
	"os"
	"testing"

	"github.com/AFASystems/presence/internal/pkg/config"
)

func TestConfig_Constants(t *testing.T) {
	if config.SMALL_CHANNEL_SIZE != 200 {
		t.Errorf("Expected SMALL_CHANNEL_SIZE 200, got %d", config.SMALL_CHANNEL_SIZE)
	}
	if config.MEDIUM_CHANNEL_SIZE != 500 {
		t.Errorf("Expected MEDIUM_CHANNEL_SIZE 500, got %d", config.MEDIUM_CHANNEL_SIZE)
	}
	if config.LARGE_CHANNEL_SIZE != 2000 {
		t.Errorf("Expected LARGE_CHANNEL_SIZE 2000, got %d", config.LARGE_CHANNEL_SIZE)
	}
}

func TestConfig_Load_WithEnv(t *testing.T) {
	// Set required env vars to avoid panic
	os.Setenv("MQTT_USERNAME", "testuser")
	os.Setenv("MQTT_PASSWORD", "testpass")
	os.Setenv("MQTT_CLIENT_ID", "testclient")
	os.Setenv("DBUser", "testdbuser")
	os.Setenv("DBPass", "testdbpass")
	os.Setenv("DBName", "testdb")
	os.Setenv("HTTPClientID", "testclient")
	os.Setenv("ClientSecret", "testsecret")
	os.Setenv("HTTPUsername", "testuser")
	os.Setenv("HTTPPassword", "testpass")
	os.Setenv("HTTPAudience", "testaudience")
	defer func() {
		os.Unsetenv("MQTT_USERNAME")
		os.Unsetenv("MQTT_PASSWORD")
		os.Unsetenv("MQTT_CLIENT_ID")
		os.Unsetenv("DBUser")
		os.Unsetenv("DBPass")
		os.Unsetenv("DBName")
		os.Unsetenv("HTTPClientID")
		os.Unsetenv("ClientSecret")
		os.Unsetenv("HTTPUsername")
		os.Unsetenv("HTTPPassword")
		os.Unsetenv("HTTPAudience")
	}()

	cfg := config.Load()
	if cfg == nil {
		t.Fatal("Load returned nil")
	}
	if cfg.MQTTUser != "testuser" {
		t.Errorf("Expected MQTTUser testuser, got %s", cfg.MQTTUser)
	}
	if cfg.HTTPAddr != "0.0.0.0:1902" {
		t.Errorf("Expected default HTTPAddr, got %s", cfg.HTTPAddr)
	}
}