package config

import (
	"testing"
)

func TestConfig_Validate(t *testing.T) {
	tests := []struct {
		name    string
		cfg     Config
		wantErr bool
	}{
		{
			name: "valid defaults",
			cfg:  GetDefaultConfig(),
		},
		{
			name: "negative concurrency",
			cfg: Config{
				MaxConcurrentRequests: -1,
			},
			wantErr: true,
		},
		{
			name: "invalid memory gc algorithm",
			cfg: Config{
				Cache: CacheConfig{
					Memory: MemoryConfig{
						Size:        "1GB",
						GCAlgorithm: "invalid",
					},
				},
			},
			wantErr: true,
		},
		{
			name: "disk enabled without path",
			cfg: Config{
				Cache: CacheConfig{
					Disk: DiskConfig{
						Size:        "100GB",
						GCAlgorithm: "lru",
					},
				},
			},
			wantErr: true,
		},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			err := tt.cfg.Validate()
			if (err != nil) != tt.wantErr {
				t.Errorf("Validate() error = %v, wantErr %v", err, tt.wantErr)
			}
		})
	}
}

func TestGetDefaultConfig(t *testing.T) {
	def := GetDefaultConfig()
	if def.ListenAddress != ":80" {
		t.Error("expected default listen address :80")
	}
	if def.Cache.Memory.Size != "1GB" {
		t.Error("expected default memory 1GB")
	}
}