package main


// *******************
// Import the modules.
//
// Our examples don't use keepclient, but they do use fmt and log to
// display output.

import (
	"fmt"
	"git.curoverse.com/arvados.git/sdk/go/arvadosclient"
	"log"
)

func main() {


	// ********************************
	// Set up an API client user agent.
	//

	arv, err := arvadosclient.MakeArvadosClient()
	if err != nil {
		log.Fatalf("Error setting up arvados client %s", err.Error())
	}


	// *****************************************
	// Print the full name of the current user.
	//

	type user struct {
		// Remember to start each field name with a capital letter,
		// otherwise it won't get populated by the arvados client because
		// the field will be invisible to it.
		Uuid     string `json:"uuid"`
		FullName string `json:"full_name"`
	}

	var u user
	err = arv.Call("GET", "users", "", "current", nil, &u)

	if err != nil {
		log.Fatalf("error querying current user", err.Error())
	}

	log.Printf("Logged in as %s (uuid %s)", u.FullName, u.Uuid)


	// ********************************************************
	// Print all fields from the first five collections returned.
	//
	// Note that some fields, are not returned by default and have to be
	// requested. See below for an example.

	var results map[string]interface{}

	params := arvadosclient.Dict{"limit": 5}

	err = arv.List("collections", params, &results)
	if err != nil {
		log.Fatalf("error querying collections", err.Error())
	}

	printArvadosResults(results)


	// *********************************************************
	// Print some fields from the first two collections returned.
	//
	// We also print manifest_test, which has to be explicitly requested.
	//

	collection_fields_wanted := []string{"manifest_text", "owner_uuid", "uuid"}
	params = arvadosclient.Dict{"limit": 2, "select": collection_fields_wanted}

	err = arv.List("collections", params, &results)
	if err != nil {
		log.Fatalf("error querying collections", err.Error())
	}

	printArvadosResults(results)
}


// A helper method which will print out a result map returned by
// arvadosclient.
func printArvadosResults(results map[string]interface{}) {
	for key, value := range results {
		// "items", if it exists, holds a map.
		// So we print it prettily below.
		if key != "items" {
			fmt.Println(key, ":", value)
		}
	}

	if value, ok := results["items"]; ok {
		items := value.([]interface{})
		for index, item := range items {
			fmt.Println("===========  ", index, "  ===========")
			item_map := item.(map[string]interface{})
			if len(item_map) == 0 {
				fmt.Println("item", index, ": empty map")
			} else {
				for k, v := range item_map {
					fmt.Println(index, k, ":", v)
				}
			}
		}
	}
}