package libpod

import (
	"net/http"

	"github.com/containers/podman/v3/libpod"
	"github.com/containers/podman/v3/pkg/api/handlers/utils"
	"github.com/containers/podman/v3/pkg/domain/entities"
	"github.com/containers/podman/v3/pkg/domain/infra/abi"
	"github.com/containers/podman/v3/pkg/util"
	"github.com/gorilla/schema"
	"github.com/pkg/errors"
)

// SystemPrune removes unused data
func SystemPrune(w http.ResponseWriter, r *http.Request) {
	decoder := r.Context().Value("decoder").(*schema.Decoder)
	runtime := r.Context().Value("runtime").(*libpod.Runtime)

	query := struct {
		All     bool `schema:"all"`
		Volumes bool `schema:"volumes"`
	}{}

	if err := decoder.Decode(&query, r.URL.Query()); err != nil {
		utils.Error(w, http.StatusText(http.StatusBadRequest), http.StatusBadRequest,
			errors.Wrapf(err, "failed to parse parameters for %s", r.URL.String()))
		return
	}
	filterMap, err := util.PrepareFilters(r)
	if err != nil {
		utils.Error(w, http.StatusText(http.StatusBadRequest), http.StatusBadRequest,
			errors.Wrapf(err, "failed to parse parameters for %s", r.URL.String()))
		return
	}

	containerEngine := abi.ContainerEngine{Libpod: runtime}

	pruneOptions := entities.SystemPruneOptions{
		All:     query.All,
		Volume:  query.Volumes,
		Filters: *filterMap,
	}
	report, err := containerEngine.SystemPrune(r.Context(), pruneOptions)
	if err != nil {
		utils.InternalServerError(w, err)
		return
	}

	utils.WriteResponse(w, http.StatusOK, report)
}

func DiskUsage(w http.ResponseWriter, r *http.Request) {
	// Options are only used by the CLI
	options := entities.SystemDfOptions{}
	runtime := r.Context().Value("runtime").(*libpod.Runtime)
	ic := abi.ContainerEngine{Libpod: runtime}
	response, err := ic.SystemDf(r.Context(), options)
	if err != nil {
		utils.InternalServerError(w, err)
		return
	}
	utils.WriteResponse(w, http.StatusOK, response)
}
