package dto

import (
	"strings"
	"testing"

	"github.com/go-playground/validator/v10"
)

// 换货原因按字符计数，上限 500：从微信复制的多行说明（含换行）不超过 500 字都应通过校验。
func TestCreateExchangeRequest_ExchangeReasonLength(t *testing.T) {
	validate := validator.New()
	multiLine := "862639070766110（门店：862639070766110机头，862639070743218后盖）\n\n" +
		"862639070743218（厂家：862639070766110后盖，862639070743218机头）\n\n这两台后盖机头窜了。"
	cases := []struct {
		name    string
		reason  string
		wantErr bool
	}{
		{name: "多行说明124字", reason: multiLine, wantErr: false},
		{name: "500个中文字", reason: strings.Repeat("换", 500), wantErr: false},
		{name: "501个中文字", reason: strings.Repeat("换", 501), wantErr: true},
		{name: "空", reason: "", wantErr: true},
	}
	for _, tc := range cases {
		t.Run(tc.name, func(t *testing.T) {
			req := CreateExchangeRequest{OldAssetType: "device", OldIdentifier: "862639070743218", ExchangeReason: tc.reason}
			err := validate.Struct(req)
			if (err != nil) != tc.wantErr {
				t.Fatalf("wantErr=%v, err=%v", tc.wantErr, err)
			}
		})
	}
}