# 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 migration plan API responses as a python dictionary."""

    _collection_name = "migration-plans"

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

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

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

    def summary(self, request, migration_plan, api=None, *args, **kwargs):
        """Generic, non-detailed view of a migration_plan."""
        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, migration_plan.id)
        return {
            "migration_plan": {
                "project_id": migration_plan.get("project_id"),
                "user_id": migration_plan.get("user_id"),
                "id": migration_plan["id"],
                "name": migration_plan["display_name"],
                "migrations_info": "",
                "description": migration_plan["display_description"],
                "status": migration_plan["status"],
                "created_at": migration_plan.get("created_at"),
                "updated_at": migration_plan.get("updated_at"),
                "scheduler_trust": res,
                'vms': migration_plan.get('vms', []),
                "links": self._get_links(request, migration_plan["id"]),
            },
        }

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

    def detail(self, request, migration_plan, api=None, *args, **kwargs):
        """Detailed view of a single migration_plan."""
        context = request.environ["workloadmgr.context"]
        if api is not None:
            migration_plan = api.migration_plan_get(context, migration_plan_id=migration_plan['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, migration_plan['id'])
        policy_id = None
        meta_data = migration_plan.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 {
            "migration_plan": {
                "created_at": migration_plan.get("created_at"),
                "updated_at": migration_plan.get("updated_at"),
                "id": migration_plan.get("id"),
                "user_id": migration_plan.get("user_id"),
                "project_id": migration_plan.get("project_id"),
                "availability_zone": migration_plan.get("availability_zone"),
                "migration_type": migration_plan.get("migration_type"),
                "name": migration_plan.get("display_name"),
                "description": migration_plan.get("display_description"),
                "vms": migration_plan.get("vms"),
                "metadata": migration_plan.get("metadata"),
                "status": migration_plan.get("status"),
                "error_msg": migration_plan.get("error_msg"),
                "links": self._get_links(request, migration_plan["id"]),
                "scheduler_trust": res,
            }
        }

    def _list_view(self, func, request, migration_plans, api=None, *args, **kwargs):
        """Provide a view for a list of migration_plans."""
        migration_plans_list = [
            func(request, migration_plan, api, *args, **kwargs)["migration_plan"]
            for migration_plan in migration_plans
        ]
        migration_plans_links = self._get_collection_links(
            request, migration_plans, self._collection_name
        )
        migration_plans_dict = dict(migration_plans=migration_plans_list)

        if migration_plans_links:
            migration_plans_dict["migration_plans_links"] = migration_plans_links

        return migration_plans_dict