package grpcclient_test

import (
	"testing"

	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"

	"go.yandata.net/wangsiyuan/go-trustlog/internal/grpcclient"
)

func TestConfig_GetAddrs(t *testing.T) {
	tests := []struct {
		name      string
		config    grpcclient.Config
		wantAddrs []string
		wantErr   bool
		errMsg    string
	}{
		{
			name: "ServerAddrs优先级高于ServerAddr",
			config: grpcclient.Config{
				ServerAddrs: []string{"server1:9090", "server2:9090"},
				ServerAddr:  "server3:9090",
			},
			wantAddrs: []string{"server1:9090", "server2:9090"},
			wantErr:   false,
		},
		{
			name: "只有ServerAddrs",
			config: grpcclient.Config{
				ServerAddrs: []string{"server1:9090", "server2:9090", "server3:9090"},
			},
			wantAddrs: []string{"server1:9090", "server2:9090", "server3:9090"},
			wantErr:   false,
		},
		{
			name: "只有ServerAddr",
			config: grpcclient.Config{
				ServerAddr: "server1:9090",
			},
			wantAddrs: []string{"server1:9090"},
			wantErr:   false,
		},
		{
			name: "ServerAddrs为空，使用ServerAddr",
			config: grpcclient.Config{
				ServerAddrs: []string{},
				ServerAddr:  "server1:9090",
			},
			wantAddrs: []string{"server1:9090"},
			wantErr:   false,
		},
		{
			name:      "没有任何地址应该返回错误",
			config:    grpcclient.Config{},
			wantAddrs: nil,
			wantErr:   true,
			errMsg:    "at least one server address is required",
		},
		{
			name: "ServerAddrs为空且ServerAddr为空",
			config: grpcclient.Config{
				ServerAddrs: []string{},
				ServerAddr:  "",
			},
			wantAddrs: nil,
			wantErr:   true,
			errMsg:    "at least one server address is required",
		},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			addrs, err := tt.config.GetAddrs()

			if tt.wantErr {
				require.Error(t, err)
				if tt.errMsg != "" {
					assert.Contains(t, err.Error(), tt.errMsg)
				}
				assert.Nil(t, addrs)
			} else {
				require.NoError(t, err)
				assert.Equal(t, tt.wantAddrs, addrs)
			}
		})
	}
}

func TestConfig_EmptyServerAddrs(t *testing.T) {
	// 测试空的 ServerAddrs 切片
	config := grpcclient.Config{
		ServerAddrs: []string{},
		ServerAddr:  "fallback:9090",
	}

	addrs, err := config.GetAddrs()
	require.NoError(t, err)
	assert.Equal(t, []string{"fallback:9090"}, addrs)
}

func TestConfig_MultipleServerAddrs(t *testing.T) {
	// 测试多个服务器地址
	config := grpcclient.Config{
		ServerAddrs: []string{
			"server1:9090",
			"server2:9091",
			"server3:9092",
			"server4:9093",
		},
	}

	addrs, err := config.GetAddrs()
	require.NoError(t, err)
	assert.Len(t, addrs, 4)
	assert.Equal(t, "server1:9090", addrs[0])
	assert.Equal(t, "server4:9093", addrs[3])
}