import logging
import os

from tool_shed.util import common_util

log = logging.getLogger( __name__ )

# String separator
STRSEP = '__ESEP__'

def generate_repository_dependencies_key_for_repository( toolshed_base_url, repository_name, repository_owner,
                                                         changeset_revision, prior_installation_required,
                                                         only_if_compiling_contained_td ):
    """
    Assumes tool shed is current tool shed since repository dependencies across tool sheds
    is not yet supported.
    """
    # The tool_shed portion of the key must be the value that is stored in the tool_shed_repository.tool_shed column
    # of the Galaxy database for an installed repository.  This value does not include the protocol, but does include
    # the port if there is one.
    tool_shed = common_util.remove_protocol_from_tool_shed_url( toolshed_base_url )
    return '%s%s%s%s%s%s%s%s%s%s%s' % ( tool_shed,
                                        STRSEP,
                                        str( repository_name ),
                                        STRSEP,
                                        str( repository_owner ),
                                        STRSEP,
                                        str( changeset_revision ),
                                        STRSEP,
                                        str( prior_installation_required ),
                                        STRSEP,
                                        str( only_if_compiling_contained_td ) )

def get_components_from_key( key ):
    """
    Assumes tool shed is current tool shed since repository dependencies across tool sheds is not
    yet supported.
    """
    items = key.split( STRSEP )
    toolshed_base_url = items[ 0 ]
    repository_name = items[ 1 ]
    repository_owner = items[ 2 ]
    changeset_revision = items[ 3 ]
    if len( items ) == 5:
        prior_installation_required = items[ 4 ]
        return toolshed_base_url, repository_name, repository_owner, changeset_revision, prior_installation_required
    elif len( items ) == 6:
        prior_installation_required = items[ 4 ]
        only_if_compiling_contained_td = items[ 5 ]
        return toolshed_base_url, \
                repository_name, \
                repository_owner, \
                changeset_revision, \
                prior_installation_required, \
                only_if_compiling_contained_td
    else:
        # For backward compatibility to the 12/20/12 Galaxy release we have to return the following, and callers
        #$ must handle exceptions.
        return toolshed_base_url, repository_name, repository_owner, changeset_revision

def print_folders( pad, folder ):
    # For debugging...
    pad_str = ''
    for i in range( 1, pad ):
        pad_str += ' '
    print '%sid: %s key: %s' % ( pad_str, str( folder.id ), folder.key )
    for repository_dependency in folder.repository_dependencies:
        print '    %s%s' % ( pad_str, repository_dependency.listify )
    for sub_folder in folder.folders:
        print_folders( pad+5, sub_folder )