package cluster

import (
	"context"
	"fmt"

	"github.com/go-playground/validator/v10"
	"github.com/mitchellh/mapstructure"
	"sigs.k8s.io/controller-runtime/pkg/client"

	"github.com/tidbcloud/eks-provider/controllers/workflow/action"
	cloudv1 "github.com/tidbcloud/infra-api/api/v1"
	"github.com/tidbcloud/infra-provider/pkg/consts"
)

var (
	validate = validator.New(validator.WithRequiredStructEnabled())
)

// waitClusterSynced waits for the cluster to be fully synced
type waitClusterSynced struct {
	cli client.Client
}

type waitClusterSyncedInputs struct {
	Namespace string `mapstructure:"namespace" json:"namespace" validate:"required"`
	Name      string `mapstructure:"name" json:"name" validate:"required"`
}

var (
	_ action.Action = &waitClusterSynced{}
)

func NewWaitClusterSyncedAction(cli client.Client) action.Action {
	return &waitClusterSynced{cli: cli}
}

func (p *waitClusterSynced) Name() cloudv1.WorkflowActionName {
	return consts.WorkflowActionWaitClusterSynced
}

func (p *waitClusterSynced) PreCheck(ctx context.Context, wf *cloudv1.Workflow, step cloudv1.WorkflowStep) error {
	inputs := &waitClusterSyncedInputs{}
	if err := mapstructure.Decode(step.Inputs.Object, inputs); err != nil {
		return fmt.Errorf("decode inputs: %w", err)
	}
	if err := validate.Struct(inputs); err != nil {
		return fmt.Errorf("validate inputs: %w", err)
	}

	return nil
}

func (p *waitClusterSynced) Handle(ctx context.Context, wf *cloudv1.Workflow, step cloudv1.WorkflowStep) error {
	inputs := &waitClusterSyncedInputs{}
	_ = mapstructure.Decode(step.Inputs.Object, inputs)

	cluster, err := getCluster(ctx, p.cli, client.ObjectKey{Namespace: inputs.Namespace, Name: inputs.Name})
	if err != nil {
		return err
	}

	if err := cluster.FullSyncedWithDetail(); err != nil {
		return fmt.Errorf("cluster %s is not fully synced: %s", inputs.Name, err.Error())
	}

	return nil
}