// Copyright 2019 Altinity Ltd and/or its affiliates. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package domain

import (
	"context"
	"fmt"

	apiErrors "k8s.io/apimachinery/pkg/api/errors"

	log "github.com/altinity/clickhouse-operator/pkg/announcer"
	api "github.com/altinity/clickhouse-operator/pkg/apis/clickhouse.altinity.com/v1"
	"github.com/altinity/clickhouse-operator/pkg/controller/common/poller"
	"github.com/altinity/clickhouse-operator/pkg/util"
)

type polledObjectGetter[TypeToGet any] interface {
	Get(ctx context.Context, params ...any) (*TypeToGet, error)
}

type HostObjectPoller[TypeToPoll any] struct {
	getter polledObjectGetter[TypeToPoll]
}

func NewHostObjectPoller[TypeToPoll any](getter polledObjectGetter[TypeToPoll]) *HostObjectPoller[TypeToPoll] {
	return &HostObjectPoller[TypeToPoll]{
		getter: getter,
	}
}

// Poll polls host's object
func (p *HostObjectPoller[TypeToPoll]) Poll(
	ctx context.Context,
	host *api.Host,
	isDoneFn func(context.Context, *TypeToPoll) bool,
	_opts ...*poller.Options,
) error {
	if util.IsContextDone(ctx) {
		log.V(1).Info("poll is aborted")
		return nil
	}

	caption := fmt.Sprintf("%s/%s", host.Runtime.Address.Namespace, host.Runtime.Address.HostName)
	opts := poller.NewOptionsFromConfig(_opts...)
	functions := &poller.Functions{
		Get: func(_ctx context.Context) (any, error) {
			return p.getter.Get(ctx, host)
		},
		IsDone: func(_ctx context.Context, a any) bool {
			return isDoneFn(_ctx, a.(*TypeToPoll))
		},
		ShouldContinueOnGetError: func(_ctx context.Context, _ any, e error) bool {
			return apiErrors.IsNotFound(e)
		},
	}

	return poller.New(ctx, caption).
		WithOptions(opts).
		WithFunctions(functions).
		Poll()
}
