package client

import (
	"errors"
	"testing"
	"time"
)

func TestNewClient(t *testing.T) {
	tests := []struct {
		name    string
		config  *Config
		wantErr error
	}{
		{
			name: "valid config",
			config: &Config{
				Endpoint:  "https://example.com",
				Region:    "us-east-1",
				AccessKey: "test-key",
				SecretKey: "test-secret",
			},
			wantErr: nil,
		},
		{
			name:    "nil config",
			config:  nil,
			wantErr: ErrInvalidConfig,
		},
		{
			name: "missing endpoint",
			config: &Config{
				Region:    "us-east-1",
				AccessKey: "test-key",
				SecretKey: "test-secret",
			},
			wantErr: ErrInvalidConfig,
		},
		{
			name: "missing region",
			config: &Config{
				Endpoint:  "https://example.com",
				AccessKey: "test-key",
				SecretKey: "test-secret",
			},
			wantErr: ErrInvalidConfig,
		},
		{
			name: "missing access key",
			config: &Config{
				Endpoint:  "https://example.com",
				Region:    "us-east-1",
				SecretKey: "test-secret",
			},
			wantErr: ErrInvalidConfig,
		},
		{
			name: "missing secret key",
			config: &Config{
				Endpoint:  "https://example.com",
				Region:    "us-east-1",
				AccessKey: "test-key",
			},
			wantErr: ErrInvalidConfig,
		},
		{
			name: "with custom timeout",
			config: &Config{
				Endpoint:  "https://example.com",
				Region:    "us-east-1",
				AccessKey: "test-key",
				SecretKey: "test-secret",
				Timeout:   60 * time.Second,
			},
			wantErr: nil,
		},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			got, err := NewClient(tt.config)
			if !errors.Is(err, tt.wantErr) {
				t.Errorf("NewClient() error = %v, wantErr %v", err, tt.wantErr)
				return
			}
			if tt.wantErr == nil && got == nil {
				t.Error("NewClient() returned nil client with no error")
			}
			if tt.wantErr != nil && got != nil {
				t.Error("NewClient() returned client with error")
			}
		})
	}
}

func TestClient_GetClient(t *testing.T) {
	cfg := &Config{
		Endpoint:  "https://example.com",
		Region:    "us-east-1",
		AccessKey: "test-key",
		SecretKey: "test-secret",
	}

	client, err := NewClient(cfg)
	if err != nil {
		t.Fatalf("failed to create client: %v", err)
	}

	osClient := client.GetClient()
	if osClient == nil {
		t.Error("GetClient() returned nil")
	}
}