package handlers

import (
	"os"
	"reflect"
	"strings"
	"testing"

	"github.com/danilsolovyov/doc-template/docx"
	"penahub.gitlab.yandexcloud.net/backend/templategen/templategen"
)

func TestGeneratorService(t *testing.T) {
	file, err := os.ReadFile("../assets/TestGeneratorService.docx")
	if err != nil {
		t.Error(err)
	}

	r := ReqGeneratorService{
		DocNumber: "2",
		Date:      "13.05.2021",
		OrgName:   `ООО ЛИГА ХОДЬБЫ "ЖЕНЬШЕНЬ" ПРИМОРСКОГО КРАЯ`,
		OrgTaxNum: "999888111",
		Sum:       "60 000 руб.",
		Goods: []ReqGeneratorServiceItem{
			{"Консультационные услуги", "2", "1500", "3000"},
			{"Развлекательные услуги", "1", "500", "500"},
			{"Информационные услуги", "10", "1000", "10000"},
		},
	}

	data := r.TemplateData()

	resultBytes, err := templategen.GenerateBytesFile(file, data)
	if err != nil {
		t.Error(err)
	}

	document := new(docx.Docx)
	err = document.ReadBytes(resultBytes)
	if err != nil {
		t.Error(err)
	}

	// _ = os.WriteFile("/tmp/out2.docx", resultBytes, 0644) // TODO delete

	checkAllFieldsPresent(t, document.GetContent(), data)
}

func checkAllFieldsPresent(t *testing.T, content string, data interface{}) {
	v := reflect.ValueOf(data)
	vt := v.Type()

	for i := 0; i < v.NumField(); i++ {
		field := v.Field(i)
		fieldName := vt.Field(i).Name
		fieldValue := field.Interface()

		switch x := fieldValue.(type) {
		case string:
			if !strings.Contains(content, x) {
				t.Errorf("missing value for '%s': '%s'", fieldName, x)
			}
		case []ReqGeneratorServiceTemplateDataItem:
			for _, item := range x {
				checkAllFieldsPresent(t, content, item)
			}
		default:
			t.Error("unhandled field")
		}
	}
}