package required

import (
	"fmt"
	"regexp"

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

type Option struct {
	ValidatorName string
	ValidatorFunc func(fl validator.FieldLevel) bool
}

func BindToValidator(v *validator.Validate, opts ...Option) error {
	for _, item := range opts {
		err := v.RegisterValidation(item.ValidatorName, item.ValidatorFunc)
		if err != nil {
			return fmt.Errorf("failed to register validator : %w", err)
		}
	}

	return nil
}

// WithAccount 創建一個新的 Option 結構，包含自定義的驗證函數，用於驗證 email 和台灣的手機號碼格式
func WithAccount(tagName string) Option {
	return Option{
		ValidatorName: tagName,
		ValidatorFunc: func(fl validator.FieldLevel) bool {
			value := fl.Field().String()
			emailRegex := `^[a-z0-9._%+\-]+@[a-z0-9.\-]+\.[a-z]{2,}$`
			phoneRegex := `^(\+886|0)?9\d{8}$`

			emailMatch, _ := regexp.MatchString(emailRegex, value)
			phoneMatch, _ := regexp.MatchString(phoneRegex, value)

			return emailMatch || phoneMatch
		},
	}
}