package model

import (
	"context"
	"time"

	"gorm.io/gorm"

	"spark-server/internal/module/user/entity"
)

// UserEmail maps table user_emails: one normalized email to one user.
type UserEmail struct {
	ID        int64     `gorm:"column:id;primaryKey;autoIncrement;comment:行 id，表内自增，仅内部用；业务唯一键是 email"`
	Email     string    `gorm:"column:email;comment:规范化后的小写邮箱，登录账号"`
	UserID    int64     `gorm:"column:user_id;comment:绑定的 users.id，一对一"`
	CreatedAt time.Time `gorm:"column:created_at;comment:绑定时间"`
}

func (UserEmail) TableName() string { return "t_user_emails" }

func (m *Repo) GetByEmail(ctx context.Context, email string) (*entity.User, error) {
	db, err := m.session(ctx)
	if err != nil {
		return nil, err
	}
	var bind UserEmail
	if err := db.Where("email = ?", email).Take(&bind).Error; err != nil {
		return nil, mapDBErr(err)
	}
	return m.GetByID(ctx, bind.UserID)
}

func (m *Repo) CreateWithEmail(ctx context.Context, u *entity.User, email string) error {
	db, err := m.session(ctx)
	if err != nil {
		return err
	}
	return db.Transaction(func(tx *gorm.DB) error {
		row := fromEntity(u)
		if err := tx.Create(&row).Error; err != nil {
			return mapDBErr(err)
		}
		bind := UserEmail{Email: email, UserID: u.ID, CreatedAt: u.CreatedAt}
		if err := tx.Create(&bind).Error; err != nil {
			return mapDBErr(err)
		}
		return nil
	})
}