""" Module contains test fixtures meant to aide in the testing of jobs and
tool evaluation. Such extensive "fixtures" are something of an anti-pattern
so use of this should be limitted to tests of very 'extensive' classes.
"""

from collections import defaultdict
import os.path
import tempfile
import shutil
import string

from galaxy.util.bunch import Bunch
from galaxy.web.security import SecurityHelper
import galaxy.model
from galaxy.model import mapping
from galaxy.tools import Tool
from galaxy.util.dbkeys import GenomeBuilds
from galaxy.jobs import NoopQueue
from galaxy.tools.parser import get_tool_source
from galaxy.tools.deps.containers import NullContainerFinder


class UsesApp( object ):

    def setup_app( self, mock_model=True ):
        self.test_directory = tempfile.mkdtemp()
        self.app = MockApp( self.test_directory, mock_model=mock_model )

    def tear_down_app( self ):
        shutil.rmtree( self.test_directory )


# Simple tool with just one text parameter and output.
SIMPLE_TOOL_CONTENTS = '''<tool id="test_tool" name="Test Tool" version="$version">
    <command>echo "$param1" &lt; $out1</command>
    <inputs>
        <param type="text" name="param1" value="" />
    </inputs>
    <outputs>
        <data name="out1" format="data" label="Output ($param1)" />
    </outputs>
</tool>
'''


# A tool with data parameters (kind of like cat1) my favorite test tool :)
SIMPLE_CAT_TOOL_CONTENTS = '''<tool id="test_tool" name="Test Tool" version="$version">
    <command>cat "$param1" #for $r in $repeat# "$r.param2" #end for# &lt; $out1</command>
    <inputs>
        <param type="data" format="tabular" name="param1" value="" />
        <repeat name="repeat1" label="Repeat 1">
            <param type="data" format="tabular" name="param2" value="" />
        </repeat>
    </inputs>
    <outputs>
        <data name="out1" format="data" />
    </outputs>
</tool>
'''


class UsesTools( object ):

    def _init_tool(
        self,
        tool_contents=SIMPLE_TOOL_CONTENTS,
        filename="tool.xml",
        version="1.0"
    ):
        self._init_app_for_tools()
        self.tool_file = os.path.join( self.test_directory, filename )
        contents_template = string.Template( tool_contents )
        tool_contents = contents_template.safe_substitute( dict( version=version ) )
        self.__write_tool( tool_contents )
        return self.__setup_tool( )

    def _init_app_for_tools( self ):
        self.app.config.drmaa_external_runjob_script = ""
        self.app.config.tool_secret = "testsecret"
        self.app.config.track_jobs_in_database = False
        self.app.job_config["get_job_tool_configurations"] = lambda ids: [Bunch(handler=Bunch())]

    def __setup_tool( self ):
        tool_source = get_tool_source( self.tool_file )
        self.tool = Tool( self.tool_file, tool_source, self.app )
        if getattr( self, "tool_action", None ):
            self.tool.tool_action = self.tool_action
        return self.tool

    def __write_tool( self, contents ):
        open( self.tool_file, "w" ).write( contents )


class MockApp( object ):

    def __init__( self, test_directory, mock_model=True ):
        # The following line is needed in order to create
        # HistoryDatasetAssociations - ideally the model classes would be
        # usable without the ORM infrastructure in place.
        in_memomry_model = mapping.init( "/tmp", "sqlite:///:memory:", create_tables=True )

        self.datatypes_registry = Bunch(
            integrated_datatypes_configs='/galaxy/integrated_datatypes_configs.xml',
            get_datatype_by_extension=lambda ext: Bunch(),
        )

        self.config = Bunch(
            outputs_to_working_directory=False,
            new_file_path=os.path.join(test_directory, "new_files"),
            tool_data_path=os.path.join(test_directory, "tools"),
            root=os.path.join(test_directory, "galaxy"),
            admin_users="mary@example.com",
            len_file_path=os.path.join( 'tool-data', 'shared', 'ucsc', 'chrom' ),
            builds_file_path=os.path.join( 'tool-data', 'shared', 'ucsc', 'builds.txt.sample' ),
            migrated_tools_config=os.path.join(test_directory, "migrated_tools_conf.xml"),
        )

        # Setup some attributes for downstream extension by specific tests.
        self.job_config = Bunch(
            dynamic_params=None,
        )

        # Two ways to handle model layer, one is to stub out some objects that
        # have an interface similar to real model (mock_model) and can keep
        # track of 'persisted' objects in a map. The other is to use a real
        # sqlalchemy layer but target an in memory database. Depending on what
        # is being tested.
        if mock_model:
            # Create self.model to mimic app.model.
            self.model = Bunch( context=MockContext() )
            for module_member_name in dir( galaxy.model ):
                module_member = getattr(galaxy.model, module_member_name)
                if type( module_member ) == type:
                    self.model[ module_member_name ] = module_member
        else:
            self.model = in_memomry_model
        self.genome_builds = GenomeBuilds( self )
        self.toolbox = None
        self.object_store = None
        self.security = SecurityHelper(id_secret="testing")
        from galaxy.security import GalaxyRBACAgent
        self.job_queue = NoopQueue()
        self.security_agent = GalaxyRBACAgent( self.model )
        self.tool_data_tables = {}
        self.dataset_collections_service = None
        self.container_finder = NullContainerFinder()
        self.name = "galaxy"


class MockContext(object):

    def __init__(self, model_objects=None):
        self.expunged_all = False
        self.flushed = False
        self.model_objects = model_objects or defaultdict( lambda: {} )
        self.created_objects = []

    def expunge_all(self):
        self.expunged_all = True

    def query(self, clazz):
        return MockQuery(self.model_objects.get(clazz))

    def flush(self):
        self.flushed = True

    def add(self, object):
        self.created_objects.append(object)


class MockQuery(object):

    def __init__(self, class_objects):
        self.class_objects = class_objects

    def filter_by(self, **kwds):
        return Bunch(first=lambda: None)

    def get(self, id):
        return self.class_objects.get(id, None)


__all__ = [ UsesApp ]