package repository

import (
	"context"

	"github.com/Caknoooo/go-gin-clean-starter/database/entities"
	"gorm.io/gorm"
)

type (
	UserRepository interface {
		Register(ctx context.Context, tx *gorm.DB, user entities.M_User) (entities.M_User, error)
		GetUserById(ctx context.Context, tx *gorm.DB, userId string) (entities.M_User, error)
		GetUserByEmail(ctx context.Context, tx *gorm.DB, email string) (entities.M_User, error)
		GetUserByUsername(ctx context.Context, tx *gorm.DB, username string) (entities.M_User, error)
		CheckEmail(ctx context.Context, tx *gorm.DB, email string) (entities.M_User, bool, error)
		CheckUsername(ctx context.Context, tx *gorm.DB, username string) (entities.M_User, bool, error)
		Update(ctx context.Context, tx *gorm.DB, user entities.M_User) (entities.M_User, error)
		Delete(ctx context.Context, tx *gorm.DB, userId string) error
		SwitchRole(ctx context.Context, tx *gorm.DB, userId string, roleId string) (entities.M_User, error)
	}

	userRepository struct {
		db *gorm.DB
	}
)

// CheckUsername implements UserRepository.
func (r *userRepository) CheckUsername(ctx context.Context, tx *gorm.DB, username string) (entities.M_User, bool, error) {
	if tx == nil {
		tx = r.db
	}

	var user entities.M_User
	if err := tx.WithContext(ctx).Where("username = ?", username).Take(&user).Error; err != nil {
		return entities.M_User{}, false, err
	}

	return user, true, nil
}

// GetUserByUsername implements UserRepository.
func (r *userRepository) GetUserByUsername(ctx context.Context, tx *gorm.DB, username string) (entities.M_User, error) {
	if tx == nil {
		tx = r.db
	}

	var user entities.M_User
	if err := tx.WithContext(ctx).
		Preload("Roles").
		Where("username = ?", username).
		Take(&user).Error; err != nil {
		return entities.M_User{}, err
	}

	return user, nil
}

func NewUserRepository(db *gorm.DB) UserRepository {
	return &userRepository{
		db: db,
	}
}

// SwitchRole implements UserRepository.
func (r *userRepository) SwitchRole(ctx context.Context, tx *gorm.DB, userId string, roleId string) (entities.M_User, error) {
	if tx == nil {
		tx = r.db
	}
	var user entities.M_User
	// Preload UserRoles dan Role di dalamnya
	if err := tx.WithContext(ctx).
		Where("id = ?", userId).
		Preload("UserRoles.Role").
		Take(&user).Error; err != nil {
		return entities.M_User{}, err
	}
	var role entities.M_Role
	if err := tx.WithContext(ctx).Where("id = ?", roleId).Take(&role).Error; err != nil {
		return entities.M_User{}, err
	}
	// Ganti semua role user dengan role baru (hapus yang lama, insert yang baru)
	if err := tx.WithContext(ctx).
		Where("user_id = ?", userId).
		Delete(&entities.M_User_Role{}).Error; err != nil {
		return entities.M_User{}, err
	}
	newUserRole := entities.M_User_Role{
		UserID: user.ID,
		RoleID: role.ID,
	}
	if err := tx.WithContext(ctx).Create(&newUserRole).Error; err != nil {
		return entities.M_User{}, err
	}
	// Ambil ulang user beserta roles-nya
	if err := tx.WithContext(ctx).
		Where("id = ?", userId).
		Preload("UserRoles.Role").
		Take(&user).Error; err != nil {
		return entities.M_User{}, err
	}
	return user, nil
}

// func (r *userRepository) SwitchRole(ctx context.Context, tx *gorm.DB, userId string, roleId string) (entities.M_User, error) {
//     if tx == nil {
//         tx = r.db
//     }
//     var user entities.M_User
//     if err := tx.WithContext(ctx).Where("id = ?", userId).Take(&user).Error; err != nil {
//         return entities.M_User{}, err
//     }
//     // Update field ActiveRoleID
//     user.ActiveRoleID = roleId
//     if err := tx.WithContext(ctx).Save(&user).Error; err != nil {
//         return entities.M_User{}, err
//     }
//     // Preload roles jika perlu
//     if err := tx.WithContext(ctx).
//         Where("id = ?", userId).
//         Preload("UserRoles.Role").
//         Take(&user).Error; err != nil {
//         return entities.M_User{}, err
//     }
//     return user, nil
// }

func (r *userRepository) Register(ctx context.Context, tx *gorm.DB, user entities.M_User) (entities.M_User, error) {
	if tx == nil {
		tx = r.db
	}

	if err := tx.WithContext(ctx).Create(&user).Error; err != nil {
		return entities.M_User{}, err
	}

	return user, nil
}

func (r *userRepository) GetUserById(ctx context.Context, tx *gorm.DB, userId string) (entities.M_User, error) {
	if tx == nil {
		tx = r.db
	}

	var user entities.M_User
	if err := tx.WithContext(ctx).
		Preload("Client").
		Preload("Roles").
		Where("id = ?", userId).
		Take(&user).Error; err != nil {
		return entities.M_User{}, err
	}

	return user, nil
}

func (r *userRepository) GetUserByEmail(ctx context.Context, tx *gorm.DB, email string) (entities.M_User, error) {
	if tx == nil {
		tx = r.db
	}

	var user entities.M_User
	if err := tx.WithContext(ctx).
		Preload("Roles").
		Where("email = ?", email).
		Take(&user).Error; err != nil {
		return entities.M_User{}, err
	}

	return user, nil
}

func (r *userRepository) CheckEmail(ctx context.Context, tx *gorm.DB, email string) (entities.M_User, bool, error) {
	if tx == nil {
		tx = r.db
	}

	var user entities.M_User
	if err := tx.WithContext(ctx).Where("email = ?", email).Take(&user).Error; err != nil {
		return entities.M_User{}, false, err
	}

	return user, true, nil
}

func (r *userRepository) Update(ctx context.Context, tx *gorm.DB, user entities.M_User) (entities.M_User, error) {
	if tx == nil {
		tx = r.db
	}

	if err := tx.WithContext(ctx).Updates(&user).Error; err != nil {
		return entities.M_User{}, err
	}

	return user, nil
}

func (r *userRepository) Delete(ctx context.Context, tx *gorm.DB, userId string) error {
	if tx == nil {
		tx = r.db
	}

	if err := tx.WithContext(ctx).Delete(&entities.M_User{}, "id = ?", userId).Error; err != nil {
		return err
	}

	return nil
}