/*
 * ModSecurity, http://www.modsecurity.org/
 * Copyright (c) 2015 Trustwave Holdings, Inc. (http://www.trustwave.com/)
 *
 * You may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * If any of the files related to licensing are missing or if you have any
 * other questions related to licensing please contact Trustwave Holdings, Inc.
 * directly using the email address security@modsecurity.org.
 *
 */

#include "variables/variable.h"

#include <iostream>
#include <string>
#include <vector>
#include <list>

#include "modsecurity/assay.h"
#include "variations/exclusion.h"

using ModSecurity::Variables::Variations::Exclusion;

namespace ModSecurity {
namespace Variables {


Variable::Variable(std::string name)
    : m_name(name),
    m_collectionName("") {

    if (m_name.at(0) == '\\') {
        m_type = RegularExpression;
    } else if (m_name.find(":") != std::string::npos) {
        m_type = SingleMatch;
    } else {
        m_type = MultipleMatches;
    }

    if (m_name.find(".") != std::string::npos) {
        m_kind = CollectionVarible;
        m_collectionName = std::string(m_name, 0, m_name.find("."));
    } else {
        m_kind = DirectVariable;
    }
}


Variable::Variable(std::string name, VariableKind kind)
    : m_name(name),
    m_collectionName(""),
    m_kind(kind) {

    if (m_name.at(0) == '\\') {
        m_type = RegularExpression;
    } else if (m_name.find(":") != std::string::npos) {
        m_type = SingleMatch;
    } else {
        m_type = MultipleMatches;
    }

    if (m_name.find(".") != std::string::npos) {
        m_collectionName = std::string(m_name, 0, m_name.find("."));
    }
}


std::list<transaction::Variable *> *
    Variable::evaluate(Assay *assay) {
    std::list<transaction::Variable *> *l =
        new std::list<transaction::Variable *>();

    if (m_collectionName.empty() == false) {
        if (m_kind == CollectionVarible && m_type == MultipleMatches) {
            assay->m_collections.resolveMultiMatches(m_name, m_collectionName, l);
        } if (m_kind == CollectionVarible && m_type == RegularExpression) {
            assay->m_collections.resolveRegularExpression(m_name, m_collectionName, l);
        } else {
            assay->m_collections.resolveSingleMatch(m_name, m_collectionName, l);
        }
    } else {
        if (m_kind == CollectionVarible && m_type == MultipleMatches) {
            assay->m_collections.resolveMultiMatches(m_name, l);
        } if (m_kind == CollectionVarible && m_type == RegularExpression) {
            assay->m_collections.resolveRegularExpression(m_name, l);
        } else {
            assay->m_collections.resolveSingleMatch(m_name, l);
        }
    }

    return l;
}


std::string Variable::to_s(
    std::vector<Variable *> *variables) {
    std::string ret;
    std::string except("");
    for (int i = 0; i < variables->size() ; i++) {
        std::string name = variables->at(i)->m_name;
        Exclusion *e =  dynamic_cast<Exclusion *>(variables->at(i));
        if (e != NULL) {
            if (except.empty()) {
                except = except + name;
            } else {
                except = except + "|" + name;
            }
            continue;
        }

        if (i == 0) {
            ret = ret + name;
        } else {
            ret = ret + "|" + name;
        }
    }

    if (except.empty() == false) {
        ret = ret + ", except for: " + except;
    }
    return ret;
}


}  // namespace Variables
}  // namespace ModSecurity