package config

import (
	"os"
	"testing"

	"github.com/spf13/viper"
)

// 重置 viper，避免测试间干扰
func resetViper() {
	viper.Reset()
}

func TestLoad_DefaultsAndBucketsOverride(t *testing.T) {
	resetViper()
	// 设置部分环境变量覆盖
	_ = os.Setenv("RUSTFS_BUCKET_TEXTURES", "tex-bkt")
	_ = os.Setenv("RUSTFS_BUCKET_AVATARS", "ava-bkt")
	_ = os.Setenv("DATABASE_MAX_IDLE_CONNS", "20")
	_ = os.Setenv("DATABASE_MAX_OPEN_CONNS", "50")
	_ = os.Setenv("DATABASE_CONN_MAX_LIFETIME", "2h")
	_ = os.Setenv("DATABASE_CONN_MAX_IDLE_TIME", "30m")

	cfg, err := Load()
	if err != nil {
		t.Fatalf("Load err: %v", err)
	}

	// 默认值检查
	if cfg.Server.Port == "" || cfg.Database.Driver == "" || cfg.Redis.Host == "" {
		t.Fatalf("expected defaults filled: %+v", cfg)
	}

	// 覆盖检查
	if cfg.RustFS.Buckets["textures"] != "tex-bkt" || cfg.RustFS.Buckets["avatars"] != "ava-bkt" {
		t.Fatalf("buckets override failed: %+v", cfg.RustFS.Buckets)
	}
	if cfg.Database.MaxIdleConns != 20 || cfg.Database.MaxOpenConns != 50 {
		t.Fatalf("db pool override failed: %+v", cfg.Database)
	}
	if cfg.Database.ConnMaxLifetime.String() != "2h0m0s" || cfg.Database.ConnMaxIdleTime.String() != "30m0s" {
		t.Fatalf("db duration override failed: %v %v", cfg.Database.ConnMaxLifetime, cfg.Database.ConnMaxIdleTime)
	}
}