#!/usr/bin/env python
# Dan Blankenberg

import json
import logging
import optparse
import os
import shutil
import tempfile
import urllib2

from xml.etree.ElementTree import tostring
try:
    # For Python 3.0 and later
    from shutil import unpack_archive
except ImportError:
    # Fall back to Python 2 import
    from setuptools.archive_util import unpack_archive

try:
    # For Python 3.0 and later
    from urllib.request import urlretrieve
except ImportError:
    # Fall back to Python 2 imports
    from urllib import urlretrieve

_log_name = __name__
if _log_name == '__builtin__':
    _log_name = 'toolshed.installed.manual.data.manager'
log = logging.getLogger( _log_name )


# --- These methods are called by/within the Galaxy Application
def exec_before_job( app, inp_data, out_data, param_dict, tool=None, **kwd ):
    # Look for any data tables that haven't been defined for this data manager before and dynamically add them to Galaxy
    param_dict = dict( **param_dict )
    data_tables_param = param_dict.get( 'data_tables', [] )
    if not isinstance( data_tables_param, list ):
        data_tables_param = [data_tables_param]
    if tool:
        tool_shed_repository = tool.tool_shed_repository
    else:
        tool_shed_repository = None
    tdtm = None
    data_manager = app.data_managers.get_manager( tool.data_manager_id, None )
    for data_table_param in data_tables_param:
        data_table_name = data_table_param.get( 'data_table_name', None )
        if data_table_name:
            # get data table managed by this data Manager
            data_table = app.tool_data_tables.get_tables().get( str( data_table_name ), None )
            if data_table:
                data_table_filename = data_table.get_filename_for_source( data_manager, None )
                if not data_table_filename:
                    if tdtm is None:
                        from tool_shed.tools import data_table_manager
                        tdtm = data_table_manager.ToolDataTableManager( app )
                        target_dir, tool_path, relative_target_dir = tdtm.get_target_install_dir( tool_shed_repository )
                    # Dynamically add this data table
                    log.debug( "Attempting to dynamically create a missing Tool Data Table named %s." % data_table_name )
                    repo_info = tdtm.generate_repository_info_elem_from_repository( tool_shed_repository, parent_elem=None )
                    if repo_info is not None:
                        repo_info = tostring( repo_info )
                    tmp_file = tempfile.NamedTemporaryFile()
                    tmp_file.write( __get_new_xml_definition( app, data_table, data_manager, repo_info, target_dir ) )
                    tmp_file.flush()
                    app.tool_data_tables.add_new_entries_from_config_file( tmp_file.name, None, app.config.shed_tool_data_table_config, persist=True )
                    tmp_file.close()


def __get_new_xml_definition( app, data_table, data_manager, repo_info=None, location_file_dir=None ):
    sub_dict = { 'table_name': data_table.name, 'comment_char': '', 'columns': '', 'file_path': '' }
    sub_dict.update( data_manager.get_tool_shed_repository_info_dict() )
    if data_table.comment_char:
        sub_dict['comment_char'] = 'comment_char="%s"' % ( data_table.comment_char )
    for i, name in enumerate( data_table.get_column_name_list() ):
        if name is not None:
            sub_dict['columns'] = "%s\n%s" % ( sub_dict['columns'], '<column name="%s" index="%s" />' % ( name, i ) )
    location_file_dir = location_file_dir or app.config.galaxy_data_manager_data_path
    for filename in data_table.filenames.keys():
        sub_dict['file_path'] = os.path.basename( filename )
        sub_dict['file_path'] = os.path.join( location_file_dir, sub_dict['file_path'] )  # os.path.abspath?
        if not os.path.exists( sub_dict['file_path'] ):
            # Create empty file
            log.debug( "Attempting to create a missing location file %s." % sub_dict['file_path'] )
            open( sub_dict['file_path'], 'wb+' ).close()
        break
    sub_dict[ 'repo_info' ] = repo_info or ''
    return """
            <tables><table name="%(table_name)s" %(comment_char)s>
                %(columns)s
                <file path="%(file_path)s" />
                %(repo_info)s
            </table></tables>
           """ % sub_dict


def galaxy_code_get_available_data_tables( trans ):
    # list of data tables
    return [ ( x, x, False ) for x in trans.app.tool_data_tables.get_tables().keys() ]


def galaxy_code_get_available_data_table_columns( trans, data_table_name ):
    return [ ( x, x, True ) for x in trans.app.tool_data_tables.get( data_table_name ).get_column_name_list() ]
# --- End Galaxy called Methods ---


def get_data_table_entries( params, galaxy_data_manager_data_path ):
    rval = {}
    data_tables = params.get( 'data_tables', [] )
    for data_table in data_tables:
        entry_dict = {}
        for column in data_table.get( 'columns', [] ):
            value = column.get( 'data_table_column_value', '' )
            if column.get( 'is_path', {} ).get( 'is_path_selector', None ) == 'yes' and column.get( 'is_path', {} ).get( 'abspath', None ) == 'abspath':
                value = os.path.abspath( os.path.join( galaxy_data_manager_data_path, value ) )
            entry_dict[ column.get( 'data_table_column_name', '' ) ] = value
        data_table_name = data_table['data_table_name']
        rval[ data_table_name ] = rval.get( data_table_name, [] )
        rval[ data_table_name ].append( entry_dict )
    return rval


def get_file_content( params, target_directory ):
    directory_content = params.get( 'directory_content', [] )
    for content in directory_content:
        target_path = os.path.join( target_directory, content.get( 'subdir', '' ) )
        try:
            os.makedirs( target_path )
        except OSError:
            pass
        if content.get( 'file_source', {}).get( 'file_source_selector', None ) == 'URL':
            ( filename, headers ) = urlretrieve( content.get( 'file_source', {}).get( 'file_URL', None ) )
            try:
                bname = headers['Content-Disposition']
            except KeyError:
                bname = os.path.basename( urllib2.urlparse.urlsplit( content.get( 'file_source', {}).get( 'file_URL', None ) ).path )
        else:
            filename = content.get( 'file_source', {}).get( 'file_history', None )
            bname = os.path.basename( filename )
        file_action = content.get( 'file_action', {}).get( 'file_action_selector', None )
        if file_action == 'unpack':
            unpack_archive( filename, target_path )
        else:
            filename_override = content.get( 'file_action', {}).get( 'filename_override', None )
            if filename_override:
                target_path = os.path.join( target_path, filename_override )
            else:
                target_path = os.path.join( target_path, bname )
            shutil.copyfile( filename, target_path )
    return len( directory_content )


def main():
    parser = optparse.OptionParser()
    parser.add_option( '', '--galaxy_data_manager_data_path', dest='galaxy_data_manager_data_path', default='', help='Root path for galaxy_data_manager_data_path' )
    (options, args) = parser.parse_args()

    filename = args[0]

    params = json.loads( open( filename ).read() )
    target_directory = params[ 'output_data' ][0]['extra_files_path']

    data_table_entries = get_data_table_entries( params['param_dict'], options.galaxy_data_manager_data_path )

    # save info to json file
    open( filename, 'wb' ).write( json.dumps( { "data_tables": data_table_entries} ) )

    get_file_content( params['param_dict'], target_directory )


if __name__ == "__main__":
    main()