#include "precompiled.h"

#include "FormationCollection.h"
#include "graphics/ObjectManager.h"
#include "graphics/Model.h"
#include "ps/CLogger.h"
#include "ps/VFSUtil.h"

#define LOG_CATEGORY "formation"


void CFormationCollection::LoadFile( const char* path )
{
    // Build the formation name -> filename mapping. This is done so that
    // the formation 'x' can be in units/x.xml, structures/x.xml, etc, and
    // we don't have to search every directory for x.xml.

    // Extract the filename out of the path+name+extension.
    // Equivalent to /.*\/(.*)\.xml/, but not as pretty. 
    CStrW tag = CStr(path).AfterLast("/").BeforeLast(".xml");
    m_templateFilenames[tag] = path;
}

static void LoadFormationThunk( const char* path, const DirEnt* UNUSED(ent), void* context )
{
    CFormationCollection* this_ = (CFormationCollection*)context;
    this_->LoadFile(path);
}

int CFormationCollection::LoadTemplates()
{
    // Load all files in formations and subdirectories.
    THROW_ERR( vfs_dir_enum( "formations", VFS_DIR_RECURSIVE, "*.xml",
        LoadFormationThunk, this ) );
    return 0;
}

CFormation* CFormationCollection::GetTemplate( const CStrW& name )
{
    // Check whether this template has already been loaded
    templateMap::iterator it = m_templates.find( name );
    if( it != m_templates.end() )
        return( it->second );

    // Find the filename corresponding to this template
    templateFilenameMap::iterator filename_it = m_templateFilenames.find( name );
    if( filename_it == m_templateFilenames.end() )
        return( NULL );

    CStr path( filename_it->second );

    //Try to load to the formation
    CFormation* newTemplate = new CFormation();
    if( !newTemplate->LoadXml( path ) )
    {
        LOG(ERROR, LOG_CATEGORY, "CFormationCollection::LoadTemplates(): Couldn't load template \"%s\"", path.c_str());
        delete newTemplate;
        return( NULL );
    }

    LOG(NORMAL, LOG_CATEGORY, "CFormationCollection::LoadTemplates(): Loaded template \"%s\"", path.c_str());
    m_templates[name] = newTemplate;

    return newTemplate;
}

void CFormationCollection::GetFormationNames( std::vector<CStrW>& names )
{
    for( templateFilenameMap::iterator it = m_templateFilenames.begin(); it != m_templateFilenames.end(); ++it )
        if( ! (it->first.length() > 8 && it->first.Left(8) == L"template"))
            names.push_back( it->first );
}

CFormationCollection::~CFormationCollection()
{
    for( templateMap::iterator it = m_templates.begin(); it != m_templates.end(); ++it )
        delete( it->second );
}