package engine

import (
	"bytes"
	"context"
	"image"

	"github.com/deluan/navidrome/log"
	"github.com/deluan/navidrome/model"
	"github.com/deluan/navidrome/persistence"
	. "github.com/onsi/ginkgo"
	. "github.com/onsi/gomega"
)

var _ = Describe("Cover", func() {
	var cover Cover
	var ds model.DataStore
	ctx := log.NewContext(context.TODO())

	BeforeEach(func() {
		ds = &persistence.MockDataStore{MockedTranscoding: &mockTranscodingRepository{}}
		ds.Album(ctx).(*persistence.MockAlbum).SetData(`[{"id": "222", "coverArtId": "123"}, {"id": "333", "coverArtId": ""}]`)
		ds.MediaFile(ctx).(*persistence.MockMediaFile).SetData(`[{"id": "123", "path": "tests/fixtures/test.mp3", "hasCoverArt": true, "updatedAt":"2020-04-02T21:29:31.6377Z"}]`)
	})

	Context("Cache is configured", func() {
		BeforeEach(func() {
			cover = NewCover(ds, testCache)
		})

		It("retrieves the original cover art from an album", func() {
			buf := new(bytes.Buffer)

			Expect(cover.Get(ctx, "222", 0, buf)).To(BeNil())

			_, format, err := image.Decode(bytes.NewReader(buf.Bytes()))
			Expect(err).To(BeNil())
			Expect(format).To(Equal("jpeg"))
		})

		It("accepts albumIds with 'al-' prefix", func() {
			buf := new(bytes.Buffer)

			Expect(cover.Get(ctx, "al-222", 0, buf)).To(BeNil())

			_, format, err := image.Decode(bytes.NewReader(buf.Bytes()))
			Expect(err).To(BeNil())
			Expect(format).To(Equal("jpeg"))
		})

		It("returns the default cover if album does not have cover", func() {
			buf := new(bytes.Buffer)

			Expect(cover.Get(ctx, "333", 0, buf)).To(BeNil())

			_, format, err := image.Decode(bytes.NewReader(buf.Bytes()))
			Expect(err).To(BeNil())
			Expect(format).To(Equal("png"))
		})

		It("returns the default cover if album is not found", func() {
			buf := new(bytes.Buffer)

			Expect(cover.Get(ctx, "444", 0, buf)).To(BeNil())

			_, format, err := image.Decode(bytes.NewReader(buf.Bytes()))
			Expect(err).To(BeNil())
			Expect(format).To(Equal("png"))
		})

		It("retrieves the original cover art from a media_file", func() {
			buf := new(bytes.Buffer)

			Expect(cover.Get(ctx, "123", 0, buf)).To(BeNil())

			img, format, err := image.Decode(bytes.NewReader(buf.Bytes()))
			Expect(err).To(BeNil())
			Expect(format).To(Equal("jpeg"))
			Expect(img.Bounds().Size().X).To(Equal(600))
			Expect(img.Bounds().Size().Y).To(Equal(600))
		})

		It("resized cover art as requested", func() {
			buf := new(bytes.Buffer)

			Expect(cover.Get(ctx, "123", 200, buf)).To(BeNil())

			img, format, err := image.Decode(bytes.NewReader(buf.Bytes()))
			Expect(err).To(BeNil())
			Expect(format).To(Equal("jpeg"))
			Expect(img.Bounds().Size().X).To(Equal(200))
			Expect(img.Bounds().Size().Y).To(Equal(200))
		})

		Context("Errors", func() {
			It("returns err if gets error from album table", func() {
				ds.Album(ctx).(*persistence.MockAlbum).SetError(true)
				buf := new(bytes.Buffer)

				Expect(cover.Get(ctx, "222", 0, buf)).To(MatchError("Error!"))
			})

			It("returns err if gets error from media_file table", func() {
				ds.MediaFile(ctx).(*persistence.MockMediaFile).SetError(true)
				buf := new(bytes.Buffer)

				Expect(cover.Get(ctx, "123", 0, buf)).To(MatchError("Error!"))
			})
		})
	})
	Context("Cache is NOT configured", func() {
		BeforeEach(func() {
			cover = NewCover(ds, nil)
		})

		It("retrieves the original cover art from an album", func() {
			buf := new(bytes.Buffer)

			Expect(cover.Get(ctx, "222", 0, buf)).To(BeNil())

			_, format, err := image.Decode(bytes.NewReader(buf.Bytes()))
			Expect(err).To(BeNil())
			Expect(format).To(Equal("jpeg"))
		})
	})
})