# vim: tabstop=4 shiftwidth=4 softtabstop=4

# Copyright (c) 2013 TrilioData, Inc.
# All Rights Reserved.

from workloadmgr.openstack.common import log as logging
from workloadmgr.api import common


LOG = logging.getLogger(__name__)


class ViewBuilder(common.ViewBuilder):
    """Model workload API responses as a python dictionary."""

    _collection_name = "workloads"

    def __init__(self):
        """Initialize view builder."""
        super(ViewBuilder, self).__init__()

    def summary_list(self, request, workloads, api=None, *args, **kwargs):
        """Show a list of workloads without many details."""
        return self._list_view(self.summary, request, workloads, api, *args, **kwargs)

    def detail_list(self, request, workloads, api=None, *args, **kwargs):
        """Detailed view of a list of workloads ."""
        return self._list_view(self.detail, request, workloads, api, *args, **kwargs)

    def summary(self, request, workload, api=None, *args, **kwargs):
        """Generic, non-detailed view of a workload."""
        context = request.environ["workloadmgr.context"]
        res = None
        fetch_scheduler_trust = kwargs.get("scheduler_trust", False)
        if fetch_scheduler_trust:
            if not api:
                LOG.exception(
                    "'scheduler_trust' and 'api' both should be provided to ViewBuilder"
                )
            else:
                res = api.validate_scheduler_trust(context, workload.id)
        return {
            "workload": {
                "project_id": workload.get("project_id"),
                "user_id": workload.get("user_id"),
                "id": workload["id"],
                "name": workload["display_name"],
                "snapshots_info": "",
                "description": workload["display_description"],
                "workload_type_id": workload["workload_type_id"],
                "status": workload["status"],
                "created_at": workload.get("created_at"),
                "updated_at": workload.get("updated_at"),
                "scheduler_trust": res,
                #'storage_usage': workload['storage_usage'],
                #'instances': workload['instances'],
                "links": self._get_links(request, workload["id"]),
            },
        }

    def restore_summary(self, request, restore, api=None):
        """Generic, non-detailed view of a restore."""
        return {
            "restore": {
                "workload_id": restore["workload_id"],
                "instance_id": restore["instance_id"],
            },
        }

    def detail(self, request, workload, api=None, *args, **kwargs):
        """Detailed view of a single workload."""
        context = request.environ["workloadmgr.context"]
        if api is not None:
            workload = api.workload_show(context, workload_id=workload['id'])
        res = None
        fetch_scheduler_trust = kwargs.get("scheduler_trust", False)
        if fetch_scheduler_trust:
            if not api:
                LOG.exception(
                    "'scheduler_trust' and 'api' both should be provided to ViewBuilder"
                )
            else:
                res = api.validate_scheduler_trust(context, workload['id'])
        policy_id = None
        meta_data = workload.get("metadata", {})
        if meta_data:
            if isinstance(meta_data, list):
                for i in meta_data:
                    policy_id = i.get('value') if i.get('key') == 'policy_id' else None
                    if policy_id:
                        break
            if isinstance(meta_data, dict):
                policy_id = meta_data.get("policy_id", None)
        return {
            "workload": {
                "created_at": workload.get("created_at"),
                "updated_at": workload.get("updated_at"),
                "id": workload.get("id"),
                "user_id": workload.get("user_id"),
                "project_id": workload.get("project_id"),
                "availability_zone": workload.get("availability_zone"),
                "workload_type_id": workload.get("workload_type_id"),
                "name": workload.get("display_name"),
                "description": workload.get("display_description"),
                "interval": workload.get("hours"),
                "storage_usage": workload.get("storage_usage"),
                "instances": workload.get("instances"),
                "metadata": workload.get("metadata"),
                "jobschedule": workload.get("jobschedule"),
                "status": workload.get("status"),
                "error_msg": workload.get("error_msg"),
                "links": self._get_links(request, workload["id"]),
                "scheduler_trust": res,
                "policy_id": policy_id,
            }
        }

    def _list_view(self, func, request, workloads, api=None, *args, **kwargs):
        """Provide a view for a list of workloads."""
        workloads_list = [
            func(request, workload, api, *args, **kwargs)["workload"]
            for workload in workloads
        ]
        workloads_links = self._get_collection_links(
            request, workloads, self._collection_name
        )
        workloads_dict = dict(workloads=workloads_list)

        if workloads_links:
            workloads_dict["workloads_links"] = workloads_links

        return workloads_dict