package service

import (
	"aps_crm/model"
	"aps_crm/pkg/ecode"
	"gorm.io/gorm"
)

type ContactService struct{}

func (ContactService) AddContact(contact *model.Contact) int {

	code := checkMemberAndCompany(contact)
	if code != ecode.OK {
		return code
	}

	tx := model.NewContactSearch().Orm.Begin()

	// check isFirst
	errCode := setFirstContact(tx, contact)
	if errCode != ecode.OK {
		return errCode
	}

	err := model.NewContactSearch().Create(contact)
	if err != nil {
		tx.Rollback()
		return ecode.ContactExist
	}

	tx.Commit()
	return ecode.OK
}

func (ContactService) DeleteContact(id int) int {
	// check contact exist
	_, err := model.NewContactSearch().SetId(id).First()
	if err != nil {
		return ecode.ContactNotExist
	}

	// delete contact
	err = model.NewContactSearch().SetId(id).Delete()
	if err != nil {
		return ecode.ContactDeleteErr
	}
	return ecode.OK
}

func (ContactService) GetContactList() ([]*model.Contact, int) {
	// get contact list
	contacts, err := model.NewContactSearch().FindAll()
	if err != nil {
		return nil, ecode.ContactListErr
	}
	return contacts, ecode.OK
}

func (ContactService) UpdateContact(contact *model.Contact) int {
	// check contact exist
	_, err := model.NewContactSearch().SetId(contact.Id).First()
	if err != nil {
		return ecode.ContactNotExist
	}

	code := checkMemberAndCompany(contact)
	if code != ecode.OK {
		return code
	}

	tx := model.NewContactSearch().Orm.Begin()
	code = setFirstContact(tx, contact)
	if code != ecode.OK {
		return code
	}

	// update contact
	err = model.NewContactSearch().SetId(contact.Id).Update(contact)
	if err != nil {
		tx.Rollback()
		return ecode.ContactUpdateErr
	}

	tx.Commit()

	return ecode.OK
}

func checkMemberAndCompany(contact *model.Contact) int {
	// check client exist
	code := CheckClientExist(contact.ClientId)
	if code != ecode.OK {
		return code
	}

	// check member exist
	return ecode.OK
}

func setFirstContact(tx *gorm.DB, contact *model.Contact) int {
	if contact.IsFirst && contact.ClientId != 0 {
		err := model.NewContactSearch().SetClientId(contact.ClientId).UpdateByMap(map[string]interface{}{
			"is_first": false,
		})
		if err != nil {
			tx.Rollback()
			return ecode.ContactUpdateErr
		}
	}

	return ecode.OK
}

// CheckContactExist check contact exist
func CheckContactExist(id int) int {
	tmp, err := model.NewContactSearch().SetId(id).First()
	if err != nil {
		return ecode.ContactNotExist
	}

	if tmp.Id == 0 {
		return ecode.ContactNotExist
	}

	return ecode.OK
}