package value_objects

import (
	"errors"
	"strings"
)

// InvoiceInfo 发票信息值对象
type InvoiceInfo struct {
	CompanyName    string `json:"company_name"`    // 公司名称
	TaxpayerID     string `json:"taxpayer_id"`     // 纳税人识别号
	BankName       string `json:"bank_name"`       // 基本开户银行
	BankAccount    string `json:"bank_account"`    // 基本开户账号
	CompanyAddress string `json:"company_address"` // 企业注册地址
	CompanyPhone   string `json:"company_phone"`   // 企业注册电话
	ReceivingEmail string `json:"receiving_email"` // 发票接收邮箱
}

// NewInvoiceInfo 创建发票信息值对象
func NewInvoiceInfo(companyName, taxpayerID, bankName, bankAccount, companyAddress, companyPhone, receivingEmail string) *InvoiceInfo {
	return &InvoiceInfo{
		CompanyName:    strings.TrimSpace(companyName),
		TaxpayerID:     strings.TrimSpace(taxpayerID),
		BankName:       strings.TrimSpace(bankName),
		BankAccount:    strings.TrimSpace(bankAccount),
		CompanyAddress: strings.TrimSpace(companyAddress),
		CompanyPhone:   strings.TrimSpace(companyPhone),
		ReceivingEmail: strings.TrimSpace(receivingEmail),
	}
}

// ValidateForGeneralInvoice 验证普票信息
func (ii *InvoiceInfo) ValidateForGeneralInvoice() error {
	if ii.CompanyName == "" {
		return errors.New("公司名称不能为空")
	}
	if ii.TaxpayerID == "" {
		return errors.New("纳税人识别号不能为空")
	}
	if ii.ReceivingEmail == "" {
		return errors.New("发票接收邮箱不能为空")
	}
	return nil
}

// ValidateForSpecialInvoice 验证专票信息
func (ii *InvoiceInfo) ValidateForSpecialInvoice() error {
	// 先验证普票必填项
	if err := ii.ValidateForGeneralInvoice(); err != nil {
		return err
	}
	
	// 专票额外必填项
	if ii.BankName == "" {
		return errors.New("基本开户银行不能为空")
	}
	if ii.BankAccount == "" {
		return errors.New("基本开户账号不能为空")
	}
	if ii.CompanyAddress == "" {
		return errors.New("企业注册地址不能为空")
	}
	if ii.CompanyPhone == "" {
		return errors.New("企业注册电话不能为空")
	}
	return nil
}

// IsComplete 检查信息是否完整（专票要求）
func (ii *InvoiceInfo) IsComplete() bool {
	return ii.CompanyName != "" &&
		ii.TaxpayerID != "" &&
		ii.BankName != "" &&
		ii.BankAccount != "" &&
		ii.CompanyAddress != "" &&
		ii.CompanyPhone != "" &&
		ii.ReceivingEmail != ""
}

// GetMissingFields 获取缺失的字段（专票要求）
func (ii *InvoiceInfo) GetMissingFields() []string {
	var missing []string
	if ii.CompanyName == "" {
		missing = append(missing, "公司名称")
	}
	if ii.TaxpayerID == "" {
		missing = append(missing, "纳税人识别号")
	}
	if ii.BankName == "" {
		missing = append(missing, "基本开户银行")
	}
	if ii.BankAccount == "" {
		missing = append(missing, "基本开户账号")
	}
	if ii.CompanyAddress == "" {
		missing = append(missing, "企业注册地址")
	}
	if ii.CompanyPhone == "" {
		missing = append(missing, "企业注册电话")
	}
	if ii.ReceivingEmail == "" {
		missing = append(missing, "发票接收邮箱")
	}
	return missing
}