/*
Copyright (c) 2017-2018 Adubbz

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
*/

#include "install/verify_nsp.hpp"

#include <exception>
#include <string>
#include <tuple>

#include <switch.h>
#include "install/simple_filesystem.hpp"
#include "install/verify_nsp.hpp"
#include "nx/fs.hpp"
#include "nx/ncm.hpp"
#include "util/file_util.hpp"
#include "util/title_util.hpp"

#ifdef __VERIFY_NSP__
namespace tin::install
{
    NSPVerifier::NSPVerifier(std::string nspPath) :
        m_nspPath(nspPath)
    {

    }

    bool NSPVerifier::PerformVerification()
    {
        bool isComplete = true;
        nx::fs::IFileSystem nspFileSystem;

        try
        {
            nspFileSystem.OpenFileSystemWithId(m_nspPath, FsFileSystemType_ApplicationPackage, 0);
        }
        catch (std::exception& e)
        {
            this->PrintCritical("NSP is invalid and cannot be opened! Error: " + std::string(e.what()));
            printf("> NSP Path: %s\n", m_nspPath.c_str());
            return false;
        }
        this->PrintSuccess("PFS0 structure is valid");

        tin::install::nsp::SimpleFileSystem simpleFS(nspFileSystem, "/", m_nspPath + "/");

        std::string cnmtNCAPath;
        NcmContentInfo cnmtContentRecord;
        nx::ncm::ContentMeta contentMeta;

        try
        {
            std::tie(cnmtNCAPath, cnmtContentRecord) = tin::util::GetCNMTNCAInfo(m_nspPath);
        }
        catch (std::exception& e)
        {
            this->PrintCritical("Failed to find CNMT NCA. Error: " + std::string(e.what()));
            return false;
        }

        try
        {
            contentMeta = tin::util::GetContentMetaFromNCA(cnmtNCAPath);
        }
        catch (std::exception& e)
        {
            this->PrintCritical("Content meta could not be read. Error: " + std::string(e.what()));
            return false;
        }
        this->PrintSuccess("Successfully read content meta.");

        if (!simpleFS.HasFile(tin::util::GetNcaIdString(cnmtContentRecord.content_id) + ".cnmt.xml"))
            this->PrintWarning("CNMT XML is absent!");
        else
            this->PrintSuccess("CNMT XML is present.");

        auto contentMetaHeader = contentMeta.GetContentMetaHeader();
        u64 titleId = tin::util::GetBaseTitleId(contentMetaHeader.titleId, contentMetaHeader.type);

        for (NcmContentInfo contentRecord : contentMeta.GetContentRecords())
        {
            std::string ncaIdStr = tin::util::GetNcaIdString(contentRecord.content_id);
            std::string ncaName = ncaIdStr + ".nca";
            std::string xmlName = ncaIdStr + ".";

            if (simpleFS.HasFile(ncaName))
                this->PrintSuccess(ncaName + " is present.");
            else
            {
                this->PrintCritical(ncaName + " is missing!");
                return false;
            }

            // control, legalinfo

            switch (contentRecord.contentType)
            {
                case NcmContentType_Program:
                    xmlName += "programinfo.xml";
                    break;

                case NcmContentType_Data:
                    xmlName = "";
                    break;

                case NcmContentType_Control:
                    try
                    {
                        nx::fs::IFileSystem controlFileSystem;
                        controlFileSystem.OpenFileSystemWithId(m_nspPath + "/" + ncaName, FsFileSystemType_ContentControl, titleId);
                    }
                    catch (std::exception& e)
                    {
                        this->PrintCritical("Control NCA could not be read. Error: " + std::string(e.what()));
                        return false;
                    }
                    this->PrintSuccess("Control NCA is valid.");

                    xmlName += "nacp.xml";
                    break;

                case NcmContentType_HtmlDocument:
                    xmlName += "htmldocument.xml";
                    break;

                case NcmContentType_LegalInformation:
                    try
                    {
                        nx::fs::IFileSystem legalInfoFileSystem;
                        legalInfoFileSystem.OpenFileSystemWithId(m_nspPath + "/" + ncaName, FsFileSystemType_ContentManual, titleId);
                    }
                    catch (std::exception& e)
                    {
                        this->PrintCritical("Legal information NCA could not be read. Error: " + std::string(e.what()));
                        return false;
                    }
                    this->PrintSuccess("Legal information NCA is valid.");

                    xmlName += "legalinfo.xml";
                    break;

                // We ignore delta fragments (for now) since they aren't all included,
                // and we don't install them
                case NcmContentType_DeltaFragment:
                    continue;

                default:
                    this->PrintCritical("Unrecognized content type!");
                    return false;
            }

            if (xmlName == "")
                continue;

            if (simpleFS.HasFile(xmlName))
                this->PrintSuccess(xmlName + " is present.");
            else
            {
                this->PrintWarning(xmlName + " is missing!");
                isComplete = false;
            }
        }

        if (isComplete)
            this->PrintSuccess("NSP is valid.");
        else
            this->PrintWarning("NSP is installable, but incomplete.");

        return true;
    }

    void NSPVerifier::PrintCritical(std::string text)
    {
        printf("[%sCRITICAL%s] %s\n", CONSOLE_RED, CONSOLE_RESET, text.c_str());
    }

    void NSPVerifier::PrintWarning(std::string text)
    {
        printf("[%sWARNING%s] %s\n", CONSOLE_YELLOW, CONSOLE_RESET, text.c_str());
    }

    void NSPVerifier::PrintSuccess(std::string text)
    {
        printf("[%sOK%s] %s\n", CONSOLE_GREEN, CONSOLE_RESET, text.c_str());
    }
}
#endif