#include "polycode/core/PolyPhysFSFileProvider.h"

using namespace Polycode;

PhysFSFileProvider::PhysFSFileProvider() {
    canListFiles = true;
}

bool PhysFSFileProvider::parseFolder(const Polycode::String& pathString, bool showHidden, std::vector<OSFileEntry> &targetVector) {
    
    if(pathString != "/") {
        if(pathString.size() < 128) {
            if(PHYSFS_exists(pathString.c_str())) {
                if(PHYSFS_isDirectory(pathString.c_str())) {
                    
                    char **rc = PHYSFS_enumerateFiles(pathString.c_str());
                    char **i;
                    
                    String fullPath;
                    String fname;
                    for (i = rc; *i != NULL; i++) {
                        fname = std::string(*i);
                        fullPath = pathString + "/" + fname;
                        if((fname.c_str()[0] != '.' || (fname.c_str()[0] == '.'  && showHidden)) && fname != "..") {
                            if(PHYSFS_isDirectory(fullPath.c_str())) {
                                targetVector.push_back(OSFileEntry(pathString, fname, OSFileEntry::TYPE_FOLDER));
                            } else {
                                targetVector.push_back(OSFileEntry(pathString, fname, OSFileEntry::TYPE_FILE));
                            }
                        }
                    }
                    PHYSFS_freeList(rc);	
                    return true;;
                    
                }
            }
        }
    }
    return false;
}

Polycode::CoreFile *PhysFSFileProvider::openFile(const String &fileName, const String &opts) {
    
    PhysFSFile *retFile = NULL;
    if(PHYSFS_exists(fileName.c_str())) {
        if(!PHYSFS_isDirectory(fileName.c_str())) {
            retFile = new PhysFSFile();
            
            if(opts.find("a") != -1) {
                retFile->physFSFile = PHYSFS_openAppend(fileName.c_str());
            } else if(opts.find("w") != -1) {
                retFile->physFSFile = PHYSFS_openWrite(fileName.c_str());
            } else {
                retFile->physFSFile = PHYSFS_openRead(fileName.c_str());
            }
            return retFile;
        }
    }
    return NULL;
}

void PhysFSFileProvider::closeFile(Polycode::CoreFile *file) {
    PhysFSFile *physFSFile = (PhysFSFile*) file;
    PHYSFS_close(physFSFile->physFSFile);
    delete physFSFile;
}

long PhysFSFile::read( void * ptr, size_t size, size_t count) {
    return PHYSFS_read(physFSFile, ptr, size, count);
}

long PhysFSFile::write( const void * ptr, size_t size, size_t count) {
    return PHYSFS_write(physFSFile, ptr, size, count);
}

int PhysFSFile::seek(long int offset, int origin) {
    switch(origin) {
        case SEEK_SET:
            return PHYSFS_seek(physFSFile, offset);
            break;
        case SEEK_CUR: {
            PHYSFS_sint64 curoffset = PHYSFS_tell(physFSFile);
            return PHYSFS_seek(physFSFile, curoffset+offset);
        }
            break;
        case SEEK_END: {
            PHYSFS_sint64 fileLength =  PHYSFS_fileLength(physFSFile);
            return PHYSFS_seek(physFSFile, fileLength-offset);
        }
            break;
    }
    return 0;
}

long PhysFSFile::tell() {
    return PHYSFS_tell(physFSFile);   
}