// Copyright 2012-present Oliver Eilhard. All rights reserved.
// Use of this source code is governed by a MIT-license.
// See http://olivere.mit-license.org/license.txt for details.

package elastic

import (
	"context"
	"encoding/json"
	_ "net/http"
	"testing"
)

func TestMultiSearch(t *testing.T) {
	client := setupTestClientAndCreateIndex(t)

	tweet1 := tweet{
		User:    "olivere",
		Message: "Welcome to Golang and Elasticsearch.",
		Tags:    []string{"golang", "elasticsearch"},
	}
	tweet2 := tweet{
		User:    "olivere",
		Message: "Another unrelated topic.",
		Tags:    []string{"golang"},
	}
	tweet3 := tweet{
		User:    "sandrae",
		Message: "Cycling is fun.",
		Tags:    []string{"sports", "cycling"},
	}

	// Add all documents
	_, err := client.Index().Index(testIndexName).Type("doc").Id("1").BodyJson(&tweet1).Do(context.TODO())
	if err != nil {
		t.Fatal(err)
	}

	_, err = client.Index().Index(testIndexName).Type("doc").Id("2").BodyJson(&tweet2).Do(context.TODO())
	if err != nil {
		t.Fatal(err)
	}

	_, err = client.Index().Index(testIndexName).Type("doc").Id("3").BodyJson(&tweet3).Do(context.TODO())
	if err != nil {
		t.Fatal(err)
	}

	_, err = client.Flush().Index(testIndexName).Do(context.TODO())
	if err != nil {
		t.Fatal(err)
	}

	// Spawn two search queries with one roundtrip
	q1 := NewMatchAllQuery()
	q2 := NewTermQuery("tags", "golang")

	sreq1 := NewSearchRequest().Index(testIndexName, testIndexName2).
		Source(NewSearchSource().Query(q1).Size(10))
	sreq2 := NewSearchRequest().Index(testIndexName).Type("doc").
		Source(NewSearchSource().Query(q2))

	searchResult, err := client.MultiSearch().
		Add(sreq1, sreq2).
		Do(context.TODO())
	if err != nil {
		t.Fatal(err)
	}
	if searchResult.Responses == nil {
		t.Fatal("expected responses != nil; got nil")
	}
	if len(searchResult.Responses) != 2 {
		t.Fatalf("expected 2 responses; got %d", len(searchResult.Responses))
	}

	sres := searchResult.Responses[0]
	if sres.Hits == nil {
		t.Errorf("expected Hits != nil; got nil")
	}
	if sres.Hits.TotalHits != 3 {
		t.Errorf("expected Hits.TotalHits = %d; got %d", 3, sres.Hits.TotalHits)
	}
	if len(sres.Hits.Hits) != 3 {
		t.Errorf("expected len(Hits.Hits) = %d; got %d", 3, len(sres.Hits.Hits))
	}
	for _, hit := range sres.Hits.Hits {
		if hit.Index != testIndexName {
			t.Errorf("expected Hits.Hit.Index = %q; got %q", testIndexName, hit.Index)
		}
		item := make(map[string]interface{})
		err := json.Unmarshal(*hit.Source, &item)
		if err != nil {
			t.Fatal(err)
		}
	}

	sres = searchResult.Responses[1]
	if sres.Hits == nil {
		t.Errorf("expected Hits != nil; got nil")
	}
	if sres.Hits.TotalHits != 2 {
		t.Errorf("expected Hits.TotalHits = %d; got %d", 2, sres.Hits.TotalHits)
	}
	if len(sres.Hits.Hits) != 2 {
		t.Errorf("expected len(Hits.Hits) = %d; got %d", 2, len(sres.Hits.Hits))
	}
	for _, hit := range sres.Hits.Hits {
		if hit.Index != testIndexName {
			t.Errorf("expected Hits.Hit.Index = %q; got %q", testIndexName, hit.Index)
		}
		item := make(map[string]interface{})
		err := json.Unmarshal(*hit.Source, &item)
		if err != nil {
			t.Fatal(err)
		}
	}
}

func TestMultiSearchWithOneRequest(t *testing.T) {
	client := setupTestClientAndCreateIndex(t)

	tweet1 := tweet{
		User:    "olivere",
		Message: "Welcome to Golang and Elasticsearch.",
		Tags:    []string{"golang", "elasticsearch"},
	}
	tweet2 := tweet{
		User:    "olivere",
		Message: "Another unrelated topic.",
		Tags:    []string{"golang"},
	}
	tweet3 := tweet{
		User:    "sandrae",
		Message: "Cycling is fun.",
		Tags:    []string{"sports", "cycling"},
	}

	// Add all documents
	_, err := client.Index().Index(testIndexName).Type("doc").Id("1").BodyJson(&tweet1).Do(context.TODO())
	if err != nil {
		t.Fatal(err)
	}

	_, err = client.Index().Index(testIndexName).Type("doc").Id("2").BodyJson(&tweet2).Do(context.TODO())
	if err != nil {
		t.Fatal(err)
	}

	_, err = client.Index().Index(testIndexName).Type("doc").Id("3").BodyJson(&tweet3).Do(context.TODO())
	if err != nil {
		t.Fatal(err)
	}

	_, err = client.Flush().Index(testIndexName).Do(context.TODO())
	if err != nil {
		t.Fatal(err)
	}

	// Spawn two search queries with one roundtrip
	query := NewMatchAllQuery()
	source := NewSearchSource().Query(query).Size(10)
	sreq := NewSearchRequest().Source(source)

	searchResult, err := client.MultiSearch().
		Index(testIndexName).
		Add(sreq).
		Do(context.TODO())
	if err != nil {
		t.Fatal(err)
	}
	if searchResult.Responses == nil {
		t.Fatal("expected responses != nil; got nil")
	}
	if len(searchResult.Responses) != 1 {
		t.Fatalf("expected 1 responses; got %d", len(searchResult.Responses))
	}

	sres := searchResult.Responses[0]
	if sres.Hits == nil {
		t.Errorf("expected Hits != nil; got nil")
	}
	if sres.Hits.TotalHits != 3 {
		t.Errorf("expected Hits.TotalHits = %d; got %d", 3, sres.Hits.TotalHits)
	}
	if len(sres.Hits.Hits) != 3 {
		t.Errorf("expected len(Hits.Hits) = %d; got %d", 3, len(sres.Hits.Hits))
	}
	for _, hit := range sres.Hits.Hits {
		if hit.Index != testIndexName {
			t.Errorf("expected Hits.Hit.Index = %q; got %q", testIndexName, hit.Index)
		}
		item := make(map[string]interface{})
		err := json.Unmarshal(*hit.Source, &item)
		if err != nil {
			t.Fatal(err)
		}
	}
}