/*
Copyright 2018 Google LLC

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

https://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 cloud

import (
	"context"
	"fmt"
	"net/http"

	"github.com/GoogleCloudPlatform/k8s-cloud-provider/pkg/cloud/meta"
	compute "google.golang.org/api/compute/v1"
	"google.golang.org/api/googleapi"
)

// ProjectsOps is the manually implemented methods for the Projects service.
type ProjectsOps interface {
	Get(ctx context.Context, projectID string) (*compute.Project, error)
	SetCommonInstanceMetadata(ctx context.Context, projectID string, m *compute.Metadata) error
}

// MockProjectOpsState is stored in the mock.X field.
type MockProjectOpsState struct {
	metadata map[string]*compute.Metadata
}

// Get a project by projectID.
func (m *MockProjects) Get(ctx context.Context, projectID string) (*compute.Project, error) {
	m.Lock.Lock()
	defer m.Lock.Unlock()

	if p, ok := m.Objects[*meta.GlobalKey(projectID)]; ok {
		return p.ToGA(), nil
	}
	return nil, &googleapi.Error{
		Code:    http.StatusNotFound,
		Message: fmt.Sprintf("MockProjects %v not found", projectID),
	}
}

// Get a project by projectID.
func (g *GCEProjects) Get(ctx context.Context, projectID string) (*compute.Project, error) {
	rk := &RateLimitKey{
		ProjectID: projectID,
		Operation: "Get",
		Version:   meta.Version("ga"),
		Service:   "Projects",
	}
	if err := g.s.RateLimiter.Accept(ctx, rk); err != nil {
		return nil, err
	}
	call := g.s.GA.Projects.Get(projectID)
	call.Context(ctx)
	v, err := call.Do()
	g.s.RateLimiter.Observe(ctx, err, rk)
	return v, err
}

// SetCommonInstanceMetadata for a given project.
func (m *MockProjects) SetCommonInstanceMetadata(ctx context.Context, projectID string, meta *compute.Metadata) error {
	if m.X == nil {
		m.X = &MockProjectOpsState{metadata: map[string]*compute.Metadata{}}
	}
	state := m.X.(*MockProjectOpsState)
	state.metadata[projectID] = meta
	return nil
}

// SetCommonInstanceMetadata for a given project.
func (g *GCEProjects) SetCommonInstanceMetadata(ctx context.Context, projectID string, m *compute.Metadata) error {
	rk := &RateLimitKey{
		ProjectID: projectID,
		Operation: "SetCommonInstanceMetadata",
		Version:   meta.Version("ga"),
		Service:   "Projects",
	}
	if err := g.s.RateLimiter.Accept(ctx, rk); err != nil {
		return err
	}
	call := g.s.GA.Projects.SetCommonInstanceMetadata(projectID, m)
	call.Context(ctx)

	op, err := call.Do()
	g.s.RateLimiter.Observe(ctx, err, rk)
	if err != nil {
		return err
	}
	return g.s.WaitForCompletion(ctx, op)
}
