package spec

import (
	"context"

	"forge.cadoles.com/Cadoles/emissary/internal/agent"
	"forge.cadoles.com/Cadoles/emissary/internal/client"
	"forge.cadoles.com/Cadoles/emissary/internal/datastore"
	"github.com/pkg/errors"
	"gitlab.com/wpetit/goweb/logger"
)

type Controller struct{}

// Name implements node.Controller.
func (c *Controller) Name() string {
	return "spec-controller"
}

// Reconcile implements node.Controller.
func (c *Controller) Reconcile(ctx context.Context, state *agent.State) error {
	cl := agent.Client(ctx)

	agents, _, err := cl.QueryAgents(
		ctx,
		client.WithQueryAgentsLimit(1),
		client.WithQueryAgentsID(state.AgentID()),
	)
	if err != nil {
		return errors.WithStack(err)
	}

	if len(agents) == 0 {
		logger.Error(ctx, "could not find remote matching agent")

		return nil
	}

	if err := c.reconcileAgent(ctx, cl, state, agents[0]); err != nil {
		return errors.WithStack(err)
	}

	return nil
}

func (c *Controller) reconcileAgent(ctx context.Context, client *client.Client, state *agent.State, agent *datastore.Agent) error {
	ctx = logger.With(ctx, logger.F("agentID", agent.ID))

	if agent.Status != datastore.AgentStatusAccepted {
		logger.Error(ctx, "unexpected agent status", logger.F("status", agent.Status))

		return nil
	}

	specs, err := client.GetAgentSpecs(ctx, agent.ID)
	if err != nil {
		logger.Error(ctx, "could not retrieve agent specs", logger.E(errors.WithStack(err)))

		return nil
	}

	state.ClearSpecs()

	for _, spec := range specs {
		state.SetSpec(spec)
	}

	return nil
}

func NewController() *Controller {
	return &Controller{}
}

var _ agent.Controller = &Controller{}