# Copyright (C) The Arvados Authors. All rights reserved.
#
# SPDX-License-Identifier: Apache-2.0

from cwltool.command_line_tool import CommandLineTool
from .arvjob import ArvadosJob
from .arvcontainer import ArvadosContainer
from .pathmapper import ArvPathMapper
from functools import partial
from schema_salad.sourceline import SourceLine
from cwltool.errors import WorkflowException

def set_cluster_target(tool, arvrunner, builder, runtimeContext):
    cluster_target_req = None
    for field in ("hints", "requirements"):
        if field not in tool:
            continue
        for item in tool[field]:
            if item["class"] == "http://arvados.org/cwl#ClusterTarget":
                cluster_target_req = item

    if cluster_target_req is None:
        return runtimeContext

    with SourceLine(cluster_target_req, None, WorkflowException, runtimeContext.debug):
        runtimeContext = runtimeContext.copy()
        runtimeContext.submit_runner_cluster = builder.do_eval(cluster_target_req.get("cluster_id")) or runtimeContext.submit_runner_cluster
        runtimeContext.project_uuid = builder.do_eval(cluster_target_req.get("project_uuid")) or runtimeContext.project_uuid
        if runtimeContext.submit_runner_cluster and runtimeContext.submit_runner_cluster not in arvrunner.api._rootDesc["remoteHosts"]:
            raise WorkflowException("Unknown or invalid cluster id '%s' known clusters are %s" % (runtimeContext.submit_runner_cluster,
                                                                                                      ", ".join(arvrunner.api._rootDesc["remoteHosts"].keys())))
    return runtimeContext

class ArvadosCommandTool(CommandLineTool):
    """Wrap cwltool CommandLineTool to override selected methods."""

    def __init__(self, arvrunner, toolpath_object, loadingContext):
        super(ArvadosCommandTool, self).__init__(toolpath_object, loadingContext)
        self.arvrunner = arvrunner

    def make_job_runner(self, runtimeContext):
        if runtimeContext.work_api == "containers":
            return partial(ArvadosContainer, self.arvrunner, runtimeContext)
        elif runtimeContext.work_api == "jobs":
            return partial(ArvadosJob, self.arvrunner)
        else:
            raise Exception("Unsupported work_api %s", runtimeContext.work_api)

    def make_path_mapper(self, reffiles, stagedir, runtimeContext, separateDirs):
        if runtimeContext.work_api == "containers":
            return ArvPathMapper(self.arvrunner, reffiles+runtimeContext.extra_reffiles, runtimeContext.basedir,
                                 "/keep/%s",
                                 "/keep/%s/%s")
        elif runtimeContext.work_api == "jobs":
            return ArvPathMapper(self.arvrunner, reffiles, runtimeContext.basedir,
                                 "$(task.keep)/%s",
                                 "$(task.keep)/%s/%s")

    def job(self, joborder, output_callback, runtimeContext):
        builder = self._init_job(joborder, runtimeContext)
        runtimeContext = set_cluster_target(self.tool, self.arvrunner, builder, runtimeContext)

        if runtimeContext.work_api == "containers":
            dockerReq, is_req = self.get_requirement("DockerRequirement")
            if dockerReq and dockerReq.get("dockerOutputDirectory"):
                runtimeContext.outdir = dockerReq.get("dockerOutputDirectory")
                runtimeContext.docker_outdir = dockerReq.get("dockerOutputDirectory")
            else:
                runtimeContext.outdir = "/var/spool/cwl"
                runtimeContext.docker_outdir = "/var/spool/cwl"
        elif runtimeContext.work_api == "jobs":
            runtimeContext.outdir = "$(task.outdir)"
            runtimeContext.docker_outdir = "$(task.outdir)"
            runtimeContext.tmpdir = "$(task.tmpdir)"
            runtimeContext.docker_tmpdir = "$(task.tmpdir)"
        return super(ArvadosCommandTool, self).job(joborder, output_callback, runtimeContext)