package main

import (
	"fmt"
	"runtime"

	"git.frostfs.info/TrueCloudLab/xk6-frostfs/internal/registry"
	"git.frostfs.info/TrueCloudLab/xk6-frostfs/internal/version"
	"github.com/spf13/cobra"
)

var rootCmd = &cobra.Command{
	Use:     "registry-exporter",
	Version: version.Version,
	Short:   "Registry exporter",
	Long:    "Registry exporter for xk6",
	Example: `registry-exporter registry.bolt
registry-exporter --status created --out out.json registry.bolt`,
	SilenceErrors: true,
	SilenceUsage:  true,
	RunE:          rootCmdRun,
}

const (
	outFlag    = "out"
	formatFlag = "format"
	statusFlag = "status"
	ageFlag    = "age"
)

const (
	defaultOutPath = "dumped-registry.json"

	jsonFormat = "json"

	createdStatus = "created"
)

func init() {
	rootCmd.Flags().String(outFlag, defaultOutPath, "Path to output file")
	rootCmd.Flags().String(formatFlag, jsonFormat, "Output format")
	rootCmd.Flags().String(statusFlag, createdStatus, "Object status")
	rootCmd.Flags().Int(ageFlag, 0, "Object age")

	cobra.AddTemplateFunc("runtimeVersion", runtime.Version)
	rootCmd.SetVersionTemplate(`FrostFS xk6 Registry Exporter
{{printf "Version: %s" .Version }}
GoVersion: {{ runtimeVersion }}
`)
}

func rootCmdRun(cmd *cobra.Command, args []string) error {
	if len(args) != 1 {
		return fmt.Errorf("expected exacly one non-flag argumet: path to the registry, got: %s", args)
	}

	format, err := cmd.Flags().GetString(formatFlag)
	if err != nil {
		return fmt.Errorf("get '%s' flag: %w", formatFlag, err)
	}
	if format != jsonFormat {
		return fmt.Errorf("unknown format '%s', only '%s' is supported", format, jsonFormat)
	}

	out, err := cmd.Flags().GetString(outFlag)
	if err != nil {
		return fmt.Errorf("get '%s' flag: %w", outFlag, err)
	}

	status, err := cmd.Flags().GetString(statusFlag)
	if err != nil {
		return fmt.Errorf("get '%s' flag: %w", statusFlag, err)
	}

	age, err := cmd.Flags().GetInt(ageFlag)
	if err != nil {
		return fmt.Errorf("get '%s' flag: %w", ageFlag, err)
	}

	objRegistry := registry.NewObjRegistry(cmd.Context(), args[0])
	objSelector := registry.NewObjSelector(objRegistry, 0, false, &registry.ObjFilter{
		Status: status,
		Age:    age,
	})
	objExporter := registry.NewObjExporter(objSelector)

	cmd.Println("Writing result file:", out)
	return objExporter.ExportJSONPreGen(out)
}