package useCases

import (
	"RenewCMS/internal/domain/audit"
	"RenewCMS/internal/domain/hash"
	"RenewCMS/internal/domain/mail"
	"RenewCMS/internal/domain/user"
	"context"
	"strings"
	"time"
)

type RequestEmailChangeUseCase struct {
	userRepository user.Repository
	hasher         hash.Hasher
	issuer         emailChangeIssuer
	recorder       audit.Recorder
}

type RequestEmailChangeCommand struct {
	UserID          uint32
	NewEmail        string
	CurrentPassword string
}

func NewRequestEmailChangeUseCase(userRepository user.Repository, hasher hash.Hasher, mailRepository mail.Repository, dispatcher mail.Dispatcher, publicURL string, now func() time.Time, recorder audit.Recorder) *RequestEmailChangeUseCase {
	return &RequestEmailChangeUseCase{userRepository, hasher, emailChangeIssuer{userRepository, hasher, mailRepository, dispatcher, publicURL, now}, recorder}
}

func (u *RequestEmailChangeUseCase) RequestEmailChange(ctx context.Context, command RequestEmailChangeCommand) (string, error) {
	account, err := u.userRepository.Get(command.UserID)
	if err != nil {
		return "", err
	}
	event := audit.NewEvent(audit.ActionUserRequestEmail, audit.CategoryUsers)
	event.Target = userTarget(account)
	event.Security = true

	if err := u.refuse(account, command); err != nil {
		recordFailure(ctx, u.recorder, event, err)
		return "", err
	}
	if _, err := u.issuer.issue(account, command.NewEmail); err != nil {
		recordFailure(ctx, u.recorder, event, err)
		return "", err
	}
	u.issuer.sendNotice(account, command.NewEmail)
	u.recorder.Record(ctx, event)
	return command.NewEmail, nil
}

func (u *RequestEmailChangeUseCase) refuse(account user.User, command RequestEmailChangeCommand) error {
	if u.hasher.Compare(account.Password, command.CurrentPassword) != nil {
		return user.ErrWrongPassword
	}
	if strings.EqualFold(strings.TrimSpace(command.NewEmail), account.Email) {
		return user.ErrSameEmail
	}
	return nil
}