package main

import (
	"flag"
	"fmt"
	"net/http"
	"os"
	"strings"

	"git.algo.com.cn/public/saasapi"
	"git.algo.com.cn/public/saasapi/pkg/saashttp"
	"google.golang.org/protobuf/encoding/protojson"
)

const (
	getIdsMax = 100
)

type readParams struct {
	cfg      *Config
	appid    string
	ds       string
	userids  []string
	saasHttp *saashttp.SaasClient
}

func RunRead(args ...string) error {
	fs := flag.NewFlagSet("read", flag.ExitOnError)
	cfgFile := paramConfig(fs)
	appid := paramAppid(fs)
	ds := paramDataSpaceId(fs)
	userids := paramUserids(fs)

	if err := fs.Parse(args); err != nil {
		fmt.Fprintln(os.Stderr, "command line parse error", "err", err)
		return err
	}

	// 切割字符串
	idsSlice := strings.Split(*userids, ",")

	if fs.NArg() > 0 || len(idsSlice) == 0 || (len(idsSlice) == 1 && idsSlice[0] == "") || len(idsSlice) > getIdsMax || len(*ds) == 0 {
		fs.PrintDefaults()
		return nil
	}

	if strings.ToLower(*ds) == "openid" && len(*appid) == 0 {
		fmt.Fprintln(os.Stderr, "appid must be set when data space is openid")
		return nil
	}

	cfg, err := LoadConfigFile(*cfgFile)
	if err != nil {
		fmt.Fprintln(os.Stderr, "load config file error", "err", err)
		return err
	}

	readParams := readParams{
		cfg:     cfg,
		userids: idsSlice,
		appid:   *appid,
		ds:      *ds,
		saasHttp: &saashttp.SaasClient{
			Client:  &http.Client{},
			ApiUrls: saashttp.InitAPIUrl(&cfg.ApiUrls),
			Auth:    &cfg.Auth,
		},
	}

	return doRead(readParams)
}

func doRead(readParams readParams) error {
	read := &saasapi.Read{
		DataspaceId: readParams.ds,
		Appid:       readParams.appid,
	}

	saasReq := &saasapi.SaasReq{
		Cmd: &saasapi.SaasReq_Read{
			Read: read,
		},
	}

	saasReadItems := []*saasapi.ReadItem{}
	for _, userid := range readParams.userids {
		saasReadItems = append(saasReadItems, &saasapi.ReadItem{
			Userid: userid,
		})
	}

	read.ReadItems = saasReadItems

	res, err := readParams.saasHttp.Read(saasReq)

	if err != nil {
		fmt.Fprintln(os.Stderr, "submit read error", "err", err)
		return err
	}

	if res.GetCode() != saasapi.ErrorCode_SUCC {
		fmt.Fprintln(os.Stderr, protojson.Format(res))
		return err
	} else {
		fmt.Println(protojson.Format(res))
	}

	return nil
}