Authorization/repository/permission_repository.go

package repository

import (
	"authorization/db"
	"authorization/models"
	"database/sql"
	"fmt"
)

func GetPermissionByResourceActionAndRole(resource, action string, roleID int) (*models.Permission, error) {
	query := `
		SELECT p.id, p.permission_name, p.description, p.resource, p.action
		FROM permissions p
		INNER JOIN role_permissions rp ON p.id = rp.permission_id
		WHERE p.resource = ? AND p.action = ? AND rp.role_id = ?
		LIMIT 1
	`

	var perm models.Permission
	err := db.DB.QueryRow(query, resource, action, roleID).Scan(
		&perm.ID,
		&perm.PermissionName,
		&perm.Description,
		&perm.Resource,
		&perm.Action,
	)

	if err != nil {
		if err == sql.ErrNoRows {
			return nil, fmt.Errorf("permission not found or not granted to role_id=%d for resource=%s, action=%s", roleID, resource, action)
		}
		return nil, fmt.Errorf("error querying permission: %w", err)
	}

	return &perm, nil
}

// GetPolicyAttributesByPermission retrieves all policy attributes for a permission
func GetPolicyAttributesByPermission(permissionID int) ([]models.PolicyAttribute, error) {
	query := `
		SELECT id, attribute_name, attribute_type, comparison, attribute_value, permission_id
		FROM policy_attributes
		WHERE permission_id = ?
	`

	rows, err := db.DB.Query(query, permissionID)
	if err != nil {
		return nil, fmt.Errorf("error querying policy attributes: %w", err)
	}
	defer rows.Close()

	var attributes []models.PolicyAttribute
	for rows.Next() {
		var attr models.PolicyAttribute
		err := rows.Scan(
			&attr.ID,
			&attr.AttributeName,
			&attr.AttributeType,
			&attr.Comparison,
			&attr.AttributeValue,
			&attr.PermissionID,
		)
		if err != nil {
			return nil, fmt.Errorf("error scanning policy attribute: %w", err)
		}
		attributes = append(attributes, attr)
	}

	return attributes, nil
}

// GetUserAttributes retrieves all attributes for a user
func GetUserAttributes(userID string) (map[string]string, error) {
	query := `
		SELECT attribute_name, attribute_value
		FROM user_attributes
		WHERE user_id = ?
	`

	rows, err := db.DB.Query(query, userID)
	if err != nil {
		return nil, fmt.Errorf("error querying user attributes: %w", err)
	}
	defer rows.Close()

	attributes := make(map[string]string)
	for rows.Next() {
		var name, value string
		err := rows.Scan(&name, &value)
		if err != nil {
			return nil, fmt.Errorf("error scanning user attribute: %w", err)
		}
		attributes[name] = value
	}

	return attributes, nil
}

// GetUserByID retrieves user details
func GetUserByID(userID string) (*models.User, error) {
	query := `
		SELECT user_id, first_name, middle_initial, last_name, suffix, email_address,
	home_address, contact_number, 
		role_id, is_deleted, created_at, updated_at
		FROM uess_user_management.users
		WHERE user_id = ? AND is_deleted = 'N'
		LIMIT 1
	`

	var user models.User
	err := db.DB.QueryRow(query, userID).Scan(
		&user.UserID,
		&user.FirstName,
		&user.MiddleInitial,
		&user.LastName,
		&user.Suffix,
		&user.EmailAddress,



		&user.HomeAddress,
		&user.ContactNumber,

		&user.RoleID,
		&user.IsDeleted,


		&user.CreatedAt,
		&user.UpdatedAt,
	)

	if err != nil {
		if err == sql.ErrNoRows {
			return nil, fmt.Errorf("user not found: %s", userID)
		}
		return nil, fmt.Errorf("error querying user: %w", err)
	}

	return &user, nil
}

// GetAllPermissions retrieves all permissions (for caching)
func GetAllPermissions() ([]models.Permission, error) {
	query := `
		SELECT id, permission_name, description, resource, action
		FROM permissions
		ORDER BY id
	`

	rows, err := db.DB.Query(query)
	if err != nil {
		return nil, fmt.Errorf("error querying all permissions: %w", err)
	}
	defer rows.Close()

	var permissions []models.Permission
	for rows.Next() {
		var perm models.Permission
		err := rows.Scan(
			&perm.ID,
			&perm.PermissionName,
			&perm.Description,
			&perm.Resource,
			&perm.Action,
		)
		if err != nil {
			return nil, fmt.Errorf("error scanning permission: %w", err)
		}
		permissions = append(permissions, perm)
	}

	return permissions, nil
}

// GetAllPolicyAttributes retrieves all policy attributes (for caching)
func GetAllPolicyAttributes() (map[int][]models.PolicyAttribute, error) {
	query := `
		SELECT id, attribute_name, attribute_type, comparison, attribute_value, permission_id
		FROM policy_attributes
		ORDER BY permission_id, id
	`

	rows, err := db.DB.Query(query)
	if err != nil {
		return nil, fmt.Errorf("error querying all policy attributes: %w", err)
	}
	defer rows.Close()

	attributesByPermission := make(map[int][]models.PolicyAttribute)
	for rows.Next() {
		var attr models.PolicyAttribute
		err := rows.Scan(
			&attr.ID,
			&attr.AttributeName,
			&attr.AttributeType,
			&attr.Comparison,
			&attr.AttributeValue,
			&attr.PermissionID,
		)
		if err != nil {
			return nil, fmt.Errorf("error scanning policy attribute: %w", err)
		}
		attributesByPermission[attr.PermissionID] = append(attributesByPermission[attr.PermissionID], attr)
	}

	return attributesByPermission, nil
}

// Helper function to parse IN clause values
// func parseINValues(value string) []string {
// 	// Remove spaces and split by comma
// 	value = strings.ReplaceAll(value, " ", "")
// 	return strings.Split(value, ",")
// }