package validators

import (
	"fmt"
	"strings"

	"github.com/go-playground/validator/v10"
)

func errorMessage(fe validator.FieldError) string {
	prefix := "validation-error:"

	switch fe.Tag() {
	case "required":
		return fmt.Sprintf("%s %s is required", prefix, fe.Field())
	case "virt_type":
		return fmt.Sprintf("%s %s must be one of the following: %s", prefix, fe.Field(), joinValues(virtTypeValues))
	case "vm_status":
		return fmt.Sprintf("%s %s must be one of the following: %s", prefix, fe.Field(), joinValues(vmStatusValues))
	case "cpu_units":
		return fmt.Sprintf("%s %s must be between %s", prefix, fe.Field(), joinRange(cpuUnitsRange))
	case "cpu_limit":
		return fmt.Sprintf("%s %s must be between %s", prefix, fe.Field(), joinRange(cpuLimitRange))
	case "video_ram":
		return fmt.Sprintf("%s %s must be between %s", prefix, fe.Field(), joinRange(videoRamRange))
	case "io_priority":
		return fmt.Sprintf("%s %s must be between %s", prefix, fe.Field(), joinRange(ioPriorityRange))
	case "mem_guarantee_size":
		return fmt.Sprintf("%s %s must be between %s", prefix, fe.Field(), joinRange(memGuaranteeSizeRange))
	case "ha_status":
		return fmt.Sprintf("%s %s must be one of the following: %s", prefix, fe.Field(), joinValues(haStatusValues))
	case "visibility":
		return fmt.Sprintf("%s %s must be one of the following: %s", prefix, fe.Field(), joinValues(visibilityValues))
	case "metrics_period":
		return fmt.Sprintf("%s %s must be one of the following: %s", prefix, fe.Field(), joinValues(metricPeriodValues))
	case "network_type":
		return fmt.Sprintf("%s %s must be one of the following: %s", prefix, fe.Field(), joinValues(networkTypeValues))
	case "image_type":
		return fmt.Sprintf("%s %s must be one of the following: %s", prefix, fe.Field(), joinValues(imageTypeValues))
	case "image_status":
		return fmt.Sprintf("%s %s must be one of the following: %s", prefix, fe.Field(), joinValues(imageStatusValues))
	case "extstorage_status":
		return fmt.Sprintf("%s %s must be one of the following: %s", prefix, fe.Field(), joinValues(extStorageStatusValues))
	case "extstorage_type":
		return fmt.Sprintf("%s %s must be one of the following: %s", prefix, fe.Field(), joinValues(extStorageTypeValues))
	case "maintenance_status":
		return fmt.Sprintf("%s %s must be one of the following: %s", prefix, fe.Field(), joinValues(nodeMaintenanceStatusValues))
	case "agent_update_status":
		return fmt.Sprintf("%s %s must be one of the following: %s", prefix, fe.Field(), joinValues(nodeAgentStatusValues))
	case "node_status_in_ha_cluster":
		return fmt.Sprintf("%s %s must be one of the following: %s", prefix, fe.Field(), joinValues(nodeStatusInHaClusterValues))
	case "affinity":
		return fmt.Sprintf("%s %s must be one of the following: %s", prefix, fe.Field(), joinValues(affinityRuleValues))
	case "guest_os":
		return fmt.Sprintf("%s %s must be one of the following: %s", prefix, fe.Field(), joinValues(guestOSValues))
	case "guest_os_version":
		return fmt.Sprintf("%s %s must be one of the following: %s", prefix, fe.Field(), joinValues(guestOSVersionValues))
	case "auto_start":
		return fmt.Sprintf("%s %s must be one of the following: %s", prefix, fe.Field(), joinValues(autoStartValues))
	case "auto_stop":
		return fmt.Sprintf("%s %s must be one of the following: %s", prefix, fe.Field(), joinValues(autoStopValues))
	case "vnc_mode":
		return fmt.Sprintf("%s %s must be one of the following: %s", prefix, fe.Field(), joinValues(vncModeValues))
	case "chipset":
		return fmt.Sprintf("%s %s must be one of the following: %s", prefix, fe.Field(), joinValues(chipsetValues))
	case "clock_offset":
		return fmt.Sprintf("%s %s must be one of the following: %s", prefix, fe.Field(), joinValues(clockOffsetValues))
	case "template_status":
		return fmt.Sprintf("%s %s must be one of the following: %s", prefix, fe.Field(), joinValues(templateStatusValues))
	case "is_bool":
		return fmt.Sprintf("%s %s must be bool type", prefix, fe.Field())
	case "url":
		return fmt.Sprintf("%s %s: unexpected URL format", prefix, fe.Field())
	}

	return fe.Error()
}

func joinValues(values []string) string {
	return strings.Join(values, ", ")
}

func joinRange(lim []int64) string {
	return fmt.Sprintf("%d and %d", lim[0], lim[1])
}