#include "permission.h"

PermissionManager& PermissionManager::getInstance() {
    static PermissionManager instance;
    return instance;
}

void PermissionManager::addRole(const Role& role) {
    m_roles[role.getName()] = role;
    const QVector<QString>& permissions = role.getPermissions();
    for (const QString& permission : permissions) {
        m_allPermissions.insert(permission);
    }
}

void PermissionManager::removeRole(const QString& roleName) {
    if (m_roles.contains(roleName)) {
        const Role& role = m_roles[roleName];
        const QVector<QString>& permissions = role.getPermissions();
        
        // 检查是否有其他角色使用相同的权限
        for (const QString& permission : permissions) {
            bool permissionUsedByOthers = false;
            for (const Role& otherRole : m_roles) {
                if (otherRole.getName() != roleName && otherRole.hasPermission(permission)) {
                    permissionUsedByOthers = true;
                    break;
                }
            }
            if (!permissionUsedByOthers) {
                m_allPermissions.remove(permission);
            }
        }
        
        m_roles.remove(roleName);
    }
}

Role* PermissionManager::getRole(const QString& roleName) {
    if (m_roles.contains(roleName)) {
        return &m_roles[roleName];
    }
    return nullptr;
}

bool PermissionManager::checkPermission(const User& user, const QString& permission) const {
    const QVector<QString>& userRoles = user.getRoles();
    for (const QString& roleName : userRoles) {
        if (m_roles.contains(roleName)) {
            const Role& role = m_roles[roleName];
            if (role.hasPermission(permission)) {
                return true;
            }
        }
    }
    return false;
}

QSet<QString> PermissionManager::getAllPermissions() const {
    return m_allPermissions;
}