import ClientConstants as CC
import ClientData
import gc
import HydrusConstants as HC
import HydrusData
import HydrusExceptions
import HydrusFileHandling
import HydrusGlobals
import HydrusPaths
import HydrusSerialisable
import itertools
import os
import random
import re
import shutil
import stat
import wx

def GenerateExportFilename( media, terms ):
    
    mime = media.GetMime()
    
    filename = ''
    
    for ( term_type, term ) in terms:
        
        tags_manager = media.GetTagsManager()
        
        if term_type == 'string':
            
            filename += term
            
        elif term_type == 'namespace':
            
            tags = tags_manager.GetNamespaceSlice( ( term, ) )
            
            filename += ', '.join( [ tag.split( ':' )[1] for tag in tags ] )
            
        elif term_type == 'predicate':
            
            if term in ( 'tags', 'nn tags' ):
                
                current = tags_manager.GetCurrent()
                pending = tags_manager.GetPending()
                
                tags = list( current.union( pending ) )
                
                if term == 'nn tags': tags = [ tag for tag in tags if ':' not in tag ]
                else: tags = [ tag if ':' not in tag else tag.split( ':' )[1] for tag in tags ]
                
                tags.sort()
                
                filename += ', '.join( tags )
                
            elif term == 'hash':
                
                hash = media.GetHash()
                
                filename += hash.encode( 'hex' )
                
            
        elif term_type == 'tag':
            
            if ':' in term: term = term.split( ':' )[1]
            
            if tags_manager.HasTag( term ): filename += term
            
        
    
    if HC.PLATFORM_WINDOWS:
        
        filename = re.sub( '\\\\|/|:|\\*|\\?|"|<|>|\\|', '_', filename, flags = re.UNICODE )
        
    else:
        
        filename = re.sub( '/', '_', filename, flags = re.UNICODE )
        
    
    ext = HC.mime_ext_lookup[ mime ]
    
    if not filename.endswith( ext ):
        
        filename += ext
        
    
    return filename
    
def GetAllPaths( raw_paths ):
    
    file_paths = []
    
    paths_to_process = raw_paths
    
    while len( paths_to_process ) > 0:
        
        next_paths_to_process = []
        
        for path in paths_to_process:
            
            if os.path.isdir( path ):
                
                subpaths = [ os.path.join( path, filename ) for filename in os.listdir( path ) ]
                
                next_paths_to_process.extend( subpaths )
                
            else:
                
                file_paths.append( path )
                
            
        
        paths_to_process = next_paths_to_process
        
    
    gc.collect()
    
    return file_paths
    
def GetExportPath():
    
    options = HydrusGlobals.client_controller.GetOptions()
    
    portable_path = options[ 'export_path' ]
    
    if portable_path is None:
        
        path = os.path.join( os.path.expanduser( '~' ), 'hydrus_export' )
        
        HydrusPaths.MakeSureDirectoryExists( path )
        
    else:
        
        path = HydrusPaths.ConvertPortablePathToAbsPath( portable_path )
        
    
    return path
    
def GetExpectedContentUpdatePackagePath( service_key, begin, subindex ):
    
    return os.path.join( GetExpectedUpdateDir( service_key ), str( begin ) + '_' + str( subindex ) + '.json' )
    
def GetExpectedServiceUpdatePackagePath( service_key, begin ):
    
    return os.path.join( GetExpectedUpdateDir( service_key ), str( begin ) + '_metadata.json' )
    
def GetExpectedUpdateDir( service_key ):
    
    updates_dir = HydrusGlobals.client_controller.GetUpdatesDir()
    
    return os.path.join( updates_dir, service_key.encode( 'hex' ) )
    
def ParseExportPhrase( phrase ):
    
    try:
        
        terms = [ ( 'string', phrase ) ]
        
        new_terms = []
        
        for ( term_type, term ) in terms:
            
            if term_type == 'string':
                
                while '[' in term:
                    
                    ( pre, term ) = term.split( '[', 1 )
                    
                    ( namespace, term ) = term.split( ']', 1 )
                    
                    new_terms.append( ( 'string', pre ) )
                    new_terms.append( ( 'namespace', namespace ) )
                    
                
            
            new_terms.append( ( term_type, term ) )
            
        
        terms = new_terms
        
        new_terms = []
        
        for ( term_type, term ) in terms:
            
            if term_type == 'string':
                
                while '{' in term:
                    
                    ( pre, term ) = term.split( '{', 1 )
                    
                    ( predicate, term ) = term.split( '}', 1 )
                    
                    new_terms.append( ( 'string', pre ) )
                    new_terms.append( ( 'predicate', predicate ) )
                    
                
            
            new_terms.append( ( term_type, term ) )
            
        
        terms = new_terms
        
        new_terms = []
        
        for ( term_type, term ) in terms:
            
            if term_type == 'string':
                
                while '(' in term:
                    
                    ( pre, term ) = term.split( '(', 1 )
                    
                    ( tag, term ) = term.split( ')', 1 )
                    
                    new_terms.append( ( 'string', pre ) )
                    new_terms.append( ( 'tag', tag ) )
                    
                
            
            new_terms.append( ( term_type, term ) )
            
        
        terms = new_terms
        
    except: raise Exception( 'Could not parse that phrase!' )
    
    return terms
    
class ExportFolder( HydrusSerialisable.SerialisableBaseNamed ):
    
    SERIALISABLE_TYPE = HydrusSerialisable.SERIALISABLE_TYPE_EXPORT_FOLDER
    SERIALISABLE_VERSION = 1
    
    def __init__( self, name, export_type = HC.EXPORT_FOLDER_TYPE_REGULAR, file_search_context = None, period = 3600, phrase = '{hash}' ):
        
        HydrusSerialisable.SerialisableBaseNamed.__init__( self, name )
        
        self._export_type = export_type
        self._file_search_context = file_search_context
        self._period = period
        self._phrase = phrase
        self._last_checked = 0
        
    
    def _GetSerialisableInfo( self ):
        
        serialisable_file_search_context = self._file_search_context.GetSerialisableTuple()
        
        return ( self._export_type, serialisable_file_search_context, self._period, self._phrase, self._last_checked )
        
    
    def _InitialiseFromSerialisableInfo( self, serialisable_info ):
        
        ( self._export_type, serialisable_file_search_context, self._period, self._phrase, self._last_checked ) = serialisable_info
        
        self._file_search_context = HydrusSerialisable.CreateFromSerialisableTuple( serialisable_file_search_context )
        
    
    def DoWork( self ):
        
        if HydrusData.TimeHasPassed( self._last_checked + self._period ):
            
            folder_path = HydrusData.ToUnicode( self._name )
            
            if os.path.exists( folder_path ) and os.path.isdir( folder_path ):
                
                query_hash_ids = HydrusGlobals.client_controller.Read( 'file_query_ids', self._file_search_context )
                
                media_results = []
                
                i = 0
                
                base = 256
                
                while i < len( query_hash_ids ):
                    
                    if HC.options[ 'pause_export_folders_sync' ]:
                        
                        return
                        
                    
                    if i == 0: ( last_i, i ) = ( 0, base )
                    else: ( last_i, i ) = ( i, i + base )
                    
                    sub_query_hash_ids = query_hash_ids[ last_i : i ]
                    
                    more_media_results = HydrusGlobals.client_controller.Read( 'media_results_from_ids', sub_query_hash_ids )
                    
                    media_results.extend( more_media_results )
                    
                
                #
                
                terms = ParseExportPhrase( self._phrase )
                
                previous_filenames = set( os.listdir( folder_path ) )
                
                sync_filenames = set()
                
                client_files_manager = HydrusGlobals.client_controller.GetClientFilesManager()
                
                num_copied = 0
                
                for media_result in media_results:
                    
                    hash = media_result.GetHash()
                    mime = media_result.GetMime()
                    size = media_result.GetSize()
                    
                    source_path = client_files_manager.GetFilePath( hash, mime )
                    
                    filename = GenerateExportFilename( media_result, terms )
                    
                    dest_path = os.path.join( folder_path, filename )
                    
                    if filename not in sync_filenames:
                        
                        copied = HydrusPaths.MirrorFile( source_path, dest_path )
                        
                        if copied:
                            
                            num_copied += 1
                            
                            try: os.chmod( dest_path, stat.S_IWRITE | stat.S_IREAD )
                            except: pass
                            
                        
                    
                    sync_filenames.add( filename )
                    
                
                if num_copied > 0:
                    
                    HydrusData.Print( 'Export folder ' + self._name + ' exported ' + HydrusData.ConvertIntToPrettyString( num_copied ) + ' files.' )
                    
                
                if self._export_type == HC.EXPORT_FOLDER_TYPE_SYNCHRONISE:
                    
                    deletee_filenames = previous_filenames.difference( sync_filenames )
                    
                    for deletee_filename in deletee_filenames:
                        
                        deletee_path = os.path.join( folder_path, deletee_filename )
                        
                        ClientData.DeletePath( deletee_path )
                        
                    
                    if len( deletee_filenames ) > 0:
                        
                        HydrusData.Print( 'Export folder ' + self._name + ' deleted ' + HydrusData.ConvertIntToPrettyString( len( deletee_filenames ) ) + ' files.' )
                        
                    
                
            
            self._last_checked = HydrusData.GetNow()
            
            HydrusGlobals.client_controller.WriteSynchronous( 'serialisable', self )
            
        
    
    def ToTuple( self ):
        
        return ( self._name, self._export_type, self._file_search_context, self._period, self._phrase )
        
    
    def SetTuple( self, folder_path, export_type, file_search_context, period, phrase ):
        
        self._name = folder_path
        self._export_type = export_type
        self._file_search_context = file_search_context
        self._period = period
        self._phrase = phrase
        
    
HydrusSerialisable.SERIALISABLE_TYPES_TO_OBJECT_TYPES[ HydrusSerialisable.SERIALISABLE_TYPE_EXPORT_FOLDER ] = ExportFolder