package skate

import (
	"encoding/json"
	"fmt"
	"reflect"
	"testing"

	"github.com/nsf/jsondiff"
)

// XXX: Work on JSON directly, as structs can get unwieldy.
func TestOpenLibraryToRelease(t *testing.T) {
	var cases = []struct {
		work    OpenLibraryWork
		release Release
		err     error
	}{
		{
			work: OpenLibraryWork{},
			release: Release{
				ExtIDs: struct {
					Arxiv       string   `json:"arxiv,omitempty"`
					Core        string   `json:"core,omitempty"`
					DOI         string   `json:"doi,omitempty"`
					ISBN        []string `json:"isbn,omitempty"`
					Jstor       string   `json:"jstor,omitempty"`
					OLID        string   `json:"olid,omitempty"`
					PMCID       string   `json:"pmcid,omitempty"`
					PMID        string   `json:"pmid,omitempty"`
					WikidataQID string   `json:"wikidata_qid,omitempty"`
				}{},
			},
			err: nil,
		},
		{
			work: OpenLibraryWork{
				Title: "Hello World",
				Isbn: []string{
					"2844273386",
					"9782844273383",
				},
			},
			release: Release{
				ExtIDs: struct {
					Arxiv       string   `json:"arxiv,omitempty"`
					Core        string   `json:"core,omitempty"`
					DOI         string   `json:"doi,omitempty"`
					ISBN        []string `json:"isbn,omitempty"`
					Jstor       string   `json:"jstor,omitempty"`
					OLID        string   `json:"olid,omitempty"`
					PMCID       string   `json:"pmcid,omitempty"`
					PMID        string   `json:"pmid,omitempty"`
					WikidataQID string   `json:"wikidata_qid,omitempty"`
				}{
					ISBN: []string{"9782844273383"},
				},
				Title: "Hello World",
			},
			err: nil,
		},
		{
			work: OpenLibraryWork{
				Key:   "/works/OL10000003W",
				Title: "Hello World",
				Isbn: []string{
					"2844273386",
					"9782844273383",
				},
				HasFulltext: false,
			},
			release: Release{
				ExtIDs: struct {
					Arxiv       string   `json:"arxiv,omitempty"`
					Core        string   `json:"core,omitempty"`
					DOI         string   `json:"doi,omitempty"`
					ISBN        []string `json:"isbn,omitempty"`
					Jstor       string   `json:"jstor,omitempty"`
					OLID        string   `json:"olid,omitempty"`
					PMCID       string   `json:"pmcid,omitempty"`
					PMID        string   `json:"pmid,omitempty"`
					WikidataQID string   `json:"wikidata_qid,omitempty"`
				}{
					ISBN: []string{"9782844273383"},
					OLID: "OL10000003W",
				},
				Title: "Hello World",
				Extra: struct {
					ContainerName string      `json:"container_name,omitempty"`
					SubtitleValue interface{} `json:"subtitle,omitempty"` // []str or str
					Crossref      struct {
						Type string `json:"type,omitempty"`
					} `json:"crossref,omitempty"`
					DataCite struct {
						MetadataVersion int                `json:"metadataVersion,omitempty"`
						Relations       []DataCiteRelation `json:"relations,omitempty"`
					} `json:"datacite,omitempty"`
					Skate struct {
						// Mark as converted (e.g. by setting status to "ref")
						Status string `json:"status,omitempty"`
						// Carry the ref index and key around.
						Ref struct {
							Index   int64  `json:"index,omitempty"`
							Key     string `json:"key,omitempty"`
							Locator string `json:"locator,omitempty"`
						} `json:"ref,omitempty"`
						ResearchGate struct {
							URL string `json:"url,omitempty"`
						} `json:"rg,omitempty"`
					} `json:"skate,omitempty"`
					OpenLibrary struct {
						HasFulltext bool `json:"has_fulltext,omitempty"`
					} `json:"ol,omitempty"`
				}{
					OpenLibrary: struct {
						HasFulltext bool `json:"has_fulltext,omitempty"`
					}{
						HasFulltext: false,
					},
				},
			},
			err: nil,
		},
	}
	for _, c := range cases {
		r, err := OpenLibraryToRelease(&c.work)
		if err != nil {
			t.Fatalf("got %v, want %v", err, c.err)
		}
		if !reflect.DeepEqual(r, &c.release) {
			t.Fatalf(prettyStructDiff(r, &c.release))
		}
	}
}

func prettyStructDiff(s, t interface{}) string {
	b, err := json.MarshalIndent(s, "", "    ")
	if err != nil {
		return fmt.Sprintf("diff failed: %v", err)
	}
	c, err := json.MarshalIndent(t, "", "    ")
	if err != nil {
		return fmt.Sprintf("diff failed: %v", err)
	}
	opts := jsondiff.DefaultConsoleOptions()
	_, d := jsondiff.Compare(b, c, &opts)
	return d
}