package api

import (
	"net/http"

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

const (
	ErrCodeUnexpectedRevision api.ErrorCode = "unexpected-revision"
)

type updateAgentSpecRequest struct {
	spec.RawSpec
}

func (m *Mount) updateAgentSpec(w http.ResponseWriter, r *http.Request) {
	agentID, ok := getAgentID(w, r)
	if !ok {
		return
	}

	ctx := r.Context()

	updateSpecReq := &updateAgentSpecRequest{}
	if ok := api.Bind(w, r, updateSpecReq); !ok {
		return
	}

	if updateSpecReq.DefinitionVersion == "" {
		updateSpecReq.DefinitionVersion = spec.DefaultVersion
	}

	validator := spec.NewValidator(m.specDefRepo)

	if err := validator.Validate(ctx, updateSpecReq); err != nil {
		data := struct {
			Message string `json:"message"`
		}{}

		var validationErr *spec.ValidationError

		if errors.As(err, &validationErr) {
			data.Message = validationErr.Error()
		}

		err = errors.WithStack(err)
		logger.Error(ctx, "could not validate spec", logger.CapturedE(err))

		api.ErrorResponse(w, http.StatusBadRequest, api.ErrCodeInvalidRequest, data)

		return
	}

	spec, err := m.agentRepo.UpdateSpec(
		ctx,
		datastore.AgentID(agentID),
		updateSpecReq.SpecDefinitionName(),
		updateSpecReq.SpecDefinitionVersion(),
		updateSpecReq.SpecRevision(),
		updateSpecReq.SpecData(),
	)
	if err != nil {
		if errors.Is(err, datastore.ErrNotFound) {
			api.ErrorResponse(w, http.StatusNotFound, ErrCodeNotFound, nil)

			return
		}

		if errors.Is(err, datastore.ErrUnexpectedRevision) {
			api.ErrorResponse(w, http.StatusConflict, ErrCodeUnexpectedRevision, nil)

			return
		}

		err = errors.WithStack(err)
		logger.Error(ctx, "could not update spec", logger.CapturedE(err))

		api.ErrorResponse(w, http.StatusInternalServerError, ErrCodeUnknownError, nil)

		return
	}

	api.DataResponse(w, http.StatusOK, struct {
		Spec *datastore.Spec `json:"spec"`
	}{
		Spec: spec,
	})
}