package registries

import (
	"errors"
	"net/http"

	"github.com/asaskevich/govalidator"
	httperror "github.com/portainer/libhttp/error"
	"github.com/portainer/libhttp/request"
	"github.com/portainer/libhttp/response"
	portainer "github.com/portainer/portainer/api"
)

type registryCreatePayload struct {
	// Name that will be used to identify this registry
	Name string `example:"my-registry" validate:"required"`
	// Registry Type. Valid values are: 1 (Quay.io), 2 (Azure container registry), 3 (custom registry) or 4 (Gitlab registry)
	Type portainer.RegistryType `example:"1" validate:"required" enums:"1,2,3,4"`
	// URL or IP address of the Docker registry
	URL string `example:"registry.mydomain.tld:2375" validate:"required"`
	// Is authentication against this registry enabled
	Authentication bool `example:"false" validate:"required"`
	// Username used to authenticate against this registry. Required when Authentication is true
	Username string `example:"registry_user"`
	// Password used to authenticate against this registry. required when Authentication is true
	Password string `example:"registry_password"`
	// Gitlab specific details, required when type = 4
	Gitlab portainer.GitlabRegistryData
}

func (payload *registryCreatePayload) Validate(r *http.Request) error {
	if govalidator.IsNull(payload.Name) {
		return errors.New("Invalid registry name")
	}
	if govalidator.IsNull(payload.URL) {
		return errors.New("Invalid registry URL")
	}
	if payload.Authentication && (govalidator.IsNull(payload.Username) || govalidator.IsNull(payload.Password)) {
		return errors.New("Invalid credentials. Username and password must be specified when authentication is enabled")
	}
	if payload.Type != portainer.QuayRegistry && payload.Type != portainer.AzureRegistry && payload.Type != portainer.CustomRegistry && payload.Type != portainer.GitlabRegistry {
		return errors.New("Invalid registry type. Valid values are: 1 (Quay.io), 2 (Azure container registry), 3 (custom registry) or 4 (Gitlab registry)")
	}
	return nil
}

// @id RegistryCreate
// @summary Create a new registry
// @description Create a new registry.
// @description **Access policy**: administrator
// @tags registries
// @security jwt
// @accept json
// @produce json
// @param body body registryCreatePayload true "Registry details"
// @success 200 {object} portainer.Registry "Success"
// @failure 400 "Invalid request"
// @failure 500 "Server error"
// @router /registries [post]
func (handler *Handler) registryCreate(w http.ResponseWriter, r *http.Request) *httperror.HandlerError {
	var payload registryCreatePayload
	err := request.DecodeAndValidateJSONPayload(r, &payload)
	if err != nil {
		return &httperror.HandlerError{http.StatusBadRequest, "Invalid request payload", err}
	}

	registry := &portainer.Registry{
		Type:               portainer.RegistryType(payload.Type),
		Name:               payload.Name,
		URL:                payload.URL,
		Authentication:     payload.Authentication,
		Username:           payload.Username,
		Password:           payload.Password,
		UserAccessPolicies: portainer.UserAccessPolicies{},
		TeamAccessPolicies: portainer.TeamAccessPolicies{},
		Gitlab:             payload.Gitlab,
	}

	err = handler.DataStore.Registry().CreateRegistry(registry)
	if err != nil {
		return &httperror.HandlerError{http.StatusInternalServerError, "Unable to persist the registry inside the database", err}
	}

	hideFields(registry)
	return response.JSON(w, registry)
}