package cmd

import (
	"context"
	"errors"
	"io"
	"strings"
	"time"

	"github.com/navidrome/navidrome/conf"
	"github.com/navidrome/navidrome/conf/configtest"
	"github.com/navidrome/navidrome/consts"
	"github.com/navidrome/navidrome/core/artwork"
	"github.com/navidrome/navidrome/model"
	"github.com/navidrome/navidrome/tests"
	. "github.com/onsi/ginkgo/v2"
	. "github.com/onsi/gomega"
)

var _ = Describe("parseArtworkKind", func() {
	It("accepts a supported kind", func() {
		k, err := parseArtworkKind("ar")
		Expect(err).ToNot(HaveOccurred())
		Expect(k).To(Equal(model.KindArtistArtwork))
	})

	It("rejects an unknown kind and lists the valid ones", func() {
		_, err := parseArtworkKind("zz")
		Expect(err).To(HaveOccurred())
		Expect(err.Error()).To(ContainSubstring("ar"))
		Expect(err.Error()).To(ContainSubstring("al"))
	})

	It("rejects a known kind that has no artwork command", func() {
		_, err := parseArtworkKind("mf")
		Expect(err).To(HaveOccurred())
	})
})

var _ = Describe("explainResult", func() {
	It("reports the winning source", func() {
		steps := []artwork.TraceStep{{Candidate: "folder", Outcome: "hit", Detail: "/music/a.jpg"}}
		Expect(explainResult("folder", steps)).To(ContainSubstring("resolved from folder"))
	})

	It("reports not resolved when every candidate was tried and missed", func() {
		steps := []artwork.TraceStep{
			{Candidate: "artist.*", Outcome: "miss"},
			{Candidate: "external:deezer", Outcome: "miss"},
		}
		Expect(explainResult("", steps)).To(Equal("not resolved"))
	})

	It("reports indeterminate when an external lookup failed transiently", func() {
		steps := []artwork.TraceStep{
			{Candidate: "artist.*", Outcome: "miss"},
			{Candidate: "external:deezer", Outcome: "error", Detail: "context deadline exceeded"},
		}
		Expect(explainResult("", steps)).To(ContainSubstring("indeterminate"),
			"a failed network call is not evidence that the item has no artwork")
	})

	It("qualifies a win a skipped higher-priority external candidate could have taken", func() {
		steps := []artwork.TraceStep{
			{Candidate: "external:deezer", Outcome: "would-try"},
			{Candidate: "artist.*", Outcome: "hit", Detail: "/music/artist.jpg"},
		}
		res := explainResult("artist.*", steps)
		Expect(res).To(ContainSubstring("resolved from artist.*"))
		Expect(res).To(ContainSubstring("--live"),
			"offline, the winner is only the winner because the external tier was skipped")
	})

	It("does not qualify a win that no skipped candidate outranked", func() {
		steps := []artwork.TraceStep{
			{Candidate: "artist.*", Outcome: "hit"},
			{Candidate: "external:deezer", Outcome: "would-try"},
		}
		Expect(explainResult("artist.*", steps)).To(Equal("resolved from artist.*"))
	})

	It("reports indeterminate when external agents were never called", func() {
		steps := []artwork.TraceStep{
			{Candidate: "artist.*", Outcome: "miss"},
			{Candidate: "external:deezer", Outcome: "would-try"},
		}
		Expect(explainResult("", steps)).To(ContainSubstring("indeterminate"),
			"an offline run must not claim an item is unresolvable when external agents were skipped")
	})
})

var _ = Describe("formatExplain", func() {
	var rep explainReport

	BeforeEach(func() {
		rep = explainReport{
			kind:         model.KindArtistArtwork,
			id:           "ar-1",
			name:         "Radiohead",
			priorityName: "ArtistArtPriority",
			priority:     "external, artist.*",
			agents:       "lastfm,spotify",
			steps: []artwork.TraceStep{
				{Candidate: "upload", Outcome: "skipped", Detail: "no uploaded image"},
				{Candidate: "external:deezer", Outcome: "would-try"},
			},
			source: "",
		}
	})

	It("reports the item, its config and the chain it walked", func() {
		out := formatExplain(rep)
		Expect(out).To(ContainSubstring("Radiohead"))
		Expect(out).To(ContainSubstring("ar-1"))
		Expect(out).To(ContainSubstring("ArtistArtPriority"))
		Expect(out).To(ContainSubstring("lastfm,spotify"))
		Expect(out).To(ContainSubstring("external:deezer"))
		Expect(out).To(ContainSubstring("would-try"))
		Expect(out).To(ContainSubstring("indeterminate"))
	})

	It("reports the absence of stored state and of a queue row", func() {
		out := formatExplain(rep)
		Expect(out).To(ContainSubstring("no artwork state recorded"))
		Expect(out).To(ContainSubstring("not queued"))
	})

	It("prints the stored state and the queue row when they exist", func() {
		attempted := time.Date(2026, 8, 13, 10, 0, 0, 0, time.UTC)
		rep.stored = &model.ItemArtwork{Source: "folder", Hash: "abc123",
			SourcePath: "/music/cover.jpg", AttemptedAt: attempted}
		rep.queued = &model.ArtworkQueueItem{Priority: model.ArtworkPriorityScan, Attempts: 2,
			RetryAt: attempted.Add(time.Hour)}
		rep.source = "folder"

		out := formatExplain(rep)
		Expect(out).To(ContainSubstring("abc123"))
		Expect(out).To(ContainSubstring("/music/cover.jpg"))
		Expect(out).To(ContainSubstring("2026-08-13T10:00:00Z"))
		Expect(out).To(ContainSubstring("scan (50)"), "a bare 50 makes the operator look the priority up")
		Expect(out).To(ContainSubstring("resolved from folder"))
	})

	It("marks a known-absent stored state instead of printing an empty hash", func() {
		rep.stored = &model.ItemArtwork{AttemptedAt: time.Now()}
		Expect(formatExplain(rep)).To(ContainSubstring("absent"))
	})

	It("reports a failed walk as failed, not as unresolved", func() {
		rep.resolveErr = errors.New("no such directory")

		out := formatExplain(rep)
		Expect(out).To(ContainSubstring("resolution failed: no such directory"))
		Expect(out).ToNot(ContainSubstring("indeterminate"))
		Expect(out).To(ContainSubstring("would-try"), "the steps taken before the failure still print")
	})

	It("says a kind that does not walk a chain has no chain, without an empty table", func() {
		rep.kind = model.KindPlaylistArtwork
		rep.steps = nil
		rep.priorityName, rep.priority = "CoverArtPriority", "cover.*, embedded"

		out := formatExplain(rep)
		Expect(out).To(ContainSubstring("does not walk a priority chain"))
		Expect(out).ToNot(ContainSubstring("CANDIDATE"),
			"an empty chain table reads as 'nothing was tried', which is false")
		Expect(out).ToNot(ContainSubstring("not resolved"),
			"nothing was resolved because nothing was attempted")
		Expect(out).ToNot(ContainSubstring("CoverArtPriority"),
			"the priority chain config does not govern this kind")
	})
})

var _ = Describe("artwork refresh command", func() {
	It("requires at least a kind and one id", func() {
		Expect(artworkRefreshCmd.Args(artworkRefreshCmd, []string{"ar"})).To(HaveOccurred())
		Expect(artworkRefreshCmd.Args(artworkRefreshCmd, []string{"ar", "id1"})).ToNot(HaveOccurred())
		Expect(artworkRefreshCmd.Args(artworkRefreshCmd, []string{"ar", "id1", "id2"})).ToNot(HaveOccurred())
	})
})

var _ = Describe("artwork reprocess selection", func() {
	It("errors when no selector is given", func() {
		_, err := selectedKinds(nil, nil, false)
		Expect(err).To(HaveOccurred())
		Expect(err.Error()).To(ContainSubstring("--all"))
	})

	It("returns every kind for --all", func() {
		ks, err := selectedKinds(nil, nil, true)
		Expect(err).ToNot(HaveOccurred())
		Expect(ks).To(ConsistOf(artwork.RecheckKinds))
	})

	It("returns every kind for a source filter given without a kind", func() {
		ks, err := selectedKinds(nil, []string{"folder"}, false)
		Expect(err).ToNot(HaveOccurred())
		Expect(ks).To(ConsistOf(artwork.RecheckKinds), "--source alone is already a complete selection")
	})

	It("returns only the named kinds", func() {
		ks, err := selectedKinds([]string{"ar"}, nil, false)
		Expect(err).ToNot(HaveOccurred())
		Expect(ks).To(Equal([]model.Kind{model.KindArtistArtwork}))
	})

	It("keeps a named kind selection alongside a source filter", func() {
		ks, err := selectedKinds([]string{"ar"}, []string{"folder"}, false)
		Expect(err).ToNot(HaveOccurred())
		Expect(ks).To(Equal([]model.Kind{model.KindArtistArtwork}))
	})

	It("rejects an unknown kind", func() {
		_, err := selectedKinds([]string{"zz"}, nil, false)
		Expect(err).To(HaveOccurred())
	})

	It("counts a repeated kind once", func() {
		ks, err := selectedKinds([]string{"ar", "ar"}, nil, false)
		Expect(err).ToNot(HaveOccurred())
		Expect(ks).To(Equal([]model.Kind{model.KindArtistArtwork}))
	})
})

var _ = Describe("explain/reprocess source round trip", func() {
	ctx := context.Background()

	// storedSource reads back the Source line explain printed, as an operator would copy it.
	storedSource := func(out string) string {
		GinkgoHelper()
		for line := range strings.SplitSeq(out, "\n") {
			if after, ok := strings.CutPrefix(strings.TrimSpace(line), "Source:"); ok {
				return strings.TrimSpace(after)
			}
		}
		Fail("explain printed no Source line")
		return ""
	}

	It("names the absent state as reprocess --source accepts it", func() {
		ds := &tests.MockDataStore{}
		art := ds.Artwork(ctx).(*tests.MockArtworkRepo)
		Expect(art.PutItemArtwork(&model.ItemArtwork{ItemKind: model.KindArtistArtwork.Prefix(),
			ItemID: "ar-1", ImageType: model.ImageTypePrimary})).To(Succeed())

		shown := storedSource(formatExplain(explainReport{kind: model.KindArtistArtwork, id: "ar-1",
			stored: &model.ItemArtwork{AttemptedAt: time.Now()}}))

		q := ds.ArtworkQueue(ctx)
		Expect(validateSources(q, repositorySources([]string{shown}))).To(Succeed(),
			"explain's spelling of a source must be pasteable into --source")
		Expect(validateSources(q, repositorySources([]string{"(" + shown + ")"}))).ToNot(Succeed(),
			"a parenthesised name would be rejected, so explain must not print one")
	})
})

var _ = Describe("repositorySources", func() {
	It("maps the user-facing absent name onto the stored empty source", func() {
		Expect(repositorySources([]string{"absent", "folder"})).To(Equal([]string{"", "folder"}))
	})

	It("keeps an empty selection empty, meaning every source", func() {
		Expect(repositorySources(nil)).To(BeEmpty())
	})
})

var _ = Describe("promptConfirm", func() {
	var out strings.Builder

	BeforeEach(func() { out.Reset() })

	It("states the external cost and accepts an explicit yes", func() {
		Expect(promptConfirm(strings.NewReader("y\n"))(&out, 42, 7)).To(BeTrue())
		Expect(out.String()).To(ContainSubstring("re-resolve 42 items"))
		Expect(out.String()).To(ContainSubstring("External lookups: ~7 estimated"))
	})

	It("defaults to no on anything else", func() {
		Expect(promptConfirm(strings.NewReader("\n"))(&out, 1, 1)).To(BeFalse())
		Expect(promptConfirm(strings.NewReader("nope\n"))(&out, 1, 1)).To(BeFalse())
		Expect(promptConfirm(strings.NewReader(""))(&out, 1, 1)).To(BeFalse())
	})

	It("drops the external clause when no lookup will be made", func() {
		Expect(promptConfirm(strings.NewReader("y\n"))(&out, 3, 0)).To(BeTrue())
		Expect(out.String()).To(ContainSubstring("re-resolve 3 items."))
		Expect(out.String()).ToNot(ContainSubstring("External lookups"))
	})
})

var _ = Describe("reprocessConfirm", func() {
	var out strings.Builder

	BeforeEach(func() { out.Reset() })

	It("prompts when --yes was not given", func() {
		Expect(reprocessConfirm(false, strings.NewReader("n\n"))(&out, 5, 5)).To(BeFalse())
		Expect(out.String()).To(ContainSubstring("Continue?"))
	})

	It("bypasses the prompt only for --yes", func() {
		Expect(reprocessConfirm(true, strings.NewReader(""))(&out, 5, 5)).To(BeTrue())
		Expect(out.String()).To(BeEmpty(), "--yes must not print a prompt it never reads")
	})
})

var _ = Describe("reprocessArtwork", func() {
	var ds *tests.MockDataStore
	var art *tests.MockArtworkRepo
	var queue *tests.MockArtworkQueueRepo
	var out strings.Builder
	var imageAgents artwork.ImageAgentCount
	ctx := context.Background()
	kinds := []model.Kind{model.KindArtistArtwork, model.KindAlbumArtwork}
	accept := func(io.Writer, int64, int64) bool { return true }
	decline := func(io.Writer, int64, int64) bool { return false }

	put := func(kind model.Kind, id, source string) {
		Expect(art.PutItemArtwork(&model.ItemArtwork{ItemKind: kind.Prefix(), ItemID: id,
			ImageType: model.ImageTypePrimary, Hash: "h" + id, Source: source})).To(Succeed())
	}

	BeforeEach(func() {
		DeferCleanup(configtest.SetupConfig())
		conf.Server.CoverArtPriority = "cover.*, external"
		conf.Server.ArtistArtPriority = "artist.*, external"
		conf.Server.EnableM3UExternalAlbumArt = false
		imageAgents = artwork.ImageAgentCount{Artist: 1, Album: 1}
		ds = &tests.MockDataStore{}
		art = ds.Artwork(ctx).(*tests.MockArtworkRepo)
		queue = ds.ArtworkQueue(ctx).(*tests.MockArtworkQueueRepo)
		out.Reset()
		put(model.KindArtistArtwork, "ar-1", "external:deezer")
		put(model.KindArtistArtwork, "ar-2", "")
		put(model.KindAlbumArtwork, "al-1", "external:deezer")
		put(model.KindAlbumArtwork, "al-2", "folder")
	})

	It("previews the per-kind breakdown and queues nothing on a dry run", func() {
		Expect(reprocessArtwork(ctx, ds, kinds, []string{"external:deezer"}, imageAgents, true, accept, &out)).To(Succeed())

		Expect(out.String()).To(ContainSubstring("external:deezer"))
		Expect(out.String()).To(ContainSubstring("artist"))
		Expect(out.String()).To(ContainSubstring("album"))
		Expect(out.String()).To(ContainSubstring("TOTAL"))
		Expect(out.String()).To(ContainSubstring("Dry run"))
		Expect(queue.Count()).To(BeZero())
	})

	It("queues nothing when the operator declines", func() {
		Expect(reprocessArtwork(ctx, ds, kinds, nil, imageAgents, false, decline, &out)).To(Succeed())

		Expect(out.String()).To(ContainSubstring("Aborted"))
		Expect(queue.Count()).To(BeZero())
	})

	It("queues the matching items at recheck priority, leaving their artwork state alone", func() {
		Expect(reprocessArtwork(ctx, ds, kinds, []string{"external:deezer"}, imageAgents, false, accept, &out)).To(Succeed())

		Expect(queue.Count()).To(Equal(int64(2)))
		queued, err := queue.Get(model.KindAlbumArtwork, "al-1", model.ImageTypePrimary)
		Expect(err).ToNot(HaveOccurred())
		Expect(queued.Priority).To(Equal(model.ArtworkPriorityRecheck))
		_, err = queue.Get(model.KindAlbumArtwork, "al-2", model.ImageTypePrimary)
		Expect(err).To(MatchError(model.ErrNotFound), "a non-matching source must not be queued")

		stored, err := art.GetItemArtwork(model.KindAlbumArtwork, "al-1", model.ImageTypePrimary)
		Expect(err).ToNot(HaveOccurred())
		Expect(stored.Hash).To(Equal("hal-1"), "bulk reprocessing must not blank the current artwork")
	})

	It("targets the absent state", func() {
		Expect(reprocessArtwork(ctx, ds, kinds, []string{""}, imageAgents, false, accept, &out)).To(Succeed())

		Expect(queue.Count()).To(Equal(int64(1)))
		_, err := queue.Get(model.KindArtistArtwork, "ar-2", model.ImageTypePrimary)
		Expect(err).ToNot(HaveOccurred())
	})

	It("reports matched and queued separately when part of the set is already queued", func() {
		Expect(queue.Enqueue(model.ArtworkQueueItem{ItemKind: "ar", ItemID: "ar-1",
			ImageType: model.ImageTypePrimary, Priority: model.ArtworkPriorityBump})).To(Succeed())

		Expect(reprocessArtwork(ctx, ds, kinds, []string{"external:deezer"}, imageAgents, false, accept, &out)).To(Succeed())

		Expect(out.String()).To(ContainSubstring("Queued 1 of 2 matched items"))
		Expect(out.String()).To(ContainSubstring("Already queued, left unchanged: 1"))
		queued, err := queue.Get(model.KindArtistArtwork, "ar-1", model.ImageTypePrimary)
		Expect(err).ToNot(HaveOccurred())
		Expect(queued.Priority).To(Equal(model.ArtworkPriorityBump),
			"an already-queued row keeps its priority and backoff")
	})

	It("stops at a selection that matches nothing instead of prompting", func() {
		Expect(reprocessArtwork(ctx, ds, []model.Kind{model.KindRadioArtwork}, nil, imageAgents, false,
			func(io.Writer, int64, int64) bool {
				Fail("must not prompt when there is nothing to queue")
				return true
			}, &out)).To(Succeed())

		Expect(out.String()).To(ContainSubstring("Nothing"))
		Expect(queue.Count()).To(BeZero())
	})

	It("reports an empty selection as a dry run when one was asked for", func() {
		Expect(reprocessArtwork(ctx, ds, []model.Kind{model.KindRadioArtwork}, nil, imageAgents, true, accept, &out)).To(Succeed())

		Expect(out.String()).To(ContainSubstring("Nothing matches"))
		Expect(out.String()).To(ContainSubstring("Dry run"))
	})

	It("shows the external estimate on a dry run, which never reaches the prompt", func() {
		Expect(reprocessArtwork(ctx, ds, []model.Kind{model.KindAlbumArtwork}, nil, imageAgents, true, accept, &out)).To(Succeed())

		Expect(out.String()).To(ContainSubstring("External lookups: ~2 estimated"))
	})

	It("bills every agent per item, not one lookup per item", func() {
		imageAgents = artwork.ImageAgentCount{Artist: 2, Album: 3}
		var external int64
		capture := func(_ io.Writer, _, e int64) bool { external = e; return false }

		Expect(reprocessArtwork(ctx, ds, kinds, nil, imageAgents, false, capture, &out)).To(Succeed())

		Expect(external).To(Equal(int64(2*2+2*3)), "2 artists at 2 agents plus 2 albums at 3 agents")
		Expect(out.String()).To(ContainSubstring("External lookups: ~10 estimated"))
	})

	It("names the estimate's blind spots instead of claiming a bound it cannot hold", func() {
		Expect(reprocessArtwork(ctx, ds, kinds, nil, imageAgents, true, accept, &out)).To(Succeed())

		Expect(out.String()).To(ContainSubstring("plugin agents not counted"))
		Expect(out.String()).To(ContainSubstring("local hits may need fewer"))
		Expect(out.String()).ToNot(ContainSubstring("up to"), "plugin agents make any ceiling false")
		Expect(out.String()).ToNot(ContainSubstring("at least"), "a local hit makes any floor false")
	})

	It("says so when the selection needs no external lookup", func() {
		conf.Server.CoverArtPriority = "cover.*"
		put(model.KindPlaylistArtwork, "pl-1", "playlist")

		Expect(reprocessArtwork(ctx, ds, []model.Kind{model.KindPlaylistArtwork}, nil, imageAgents, true, accept, &out)).To(Succeed())

		Expect(out.String()).To(ContainSubstring("External lookups: none"))
	})

	It("counts playlists as external cost when the m3u image fetch is enabled", func() {
		conf.Server.CoverArtPriority = "cover.*"
		conf.Server.EnableM3UExternalAlbumArt = true
		put(model.KindPlaylistArtwork, "pl-1", "playlist")
		var external int64
		capture := func(_ io.Writer, _, e int64) bool { external = e; return false }

		Expect(reprocessArtwork(ctx, ds, []model.Kind{model.KindPlaylistArtwork}, nil, imageAgents, false, capture, &out)).To(Succeed())

		Expect(external).To(Equal(int64(1)))
		Expect(out.String()).To(ContainSubstring("External lookups: ~1 estimated"))
	})

	It("bills a playlist for every album its grid samples, at every agent", func() {
		imageAgents = artwork.ImageAgentCount{Album: 3}
		put(model.KindPlaylistArtwork, "pl-1", "playlist")
		var external int64
		capture := func(_ io.Writer, _, e int64) bool { external = e; return false }

		Expect(reprocessArtwork(ctx, ds, []model.Kind{model.KindPlaylistArtwork}, nil, imageAgents, false, capture, &out)).To(Succeed())

		Expect(external).To(Equal(int64(artwork.PlaylistGridSamples*3)),
			"one playlist samples 4 albums, each walking all 3 album agents")
	})

	It("counts only the kinds that call an external agent as external cost", func() {
		put(model.KindRadioArtwork, "ra-1", "upload")
		var total, external int64
		capture := func(_ io.Writer, t, e int64) bool { total, external = t, e; return false }

		Expect(reprocessArtwork(ctx, ds, []model.Kind{model.KindAlbumArtwork, model.KindRadioArtwork},
			nil, imageAgents, false, capture, &out)).To(Succeed())

		Expect(total).To(Equal(int64(3)))
		Expect(external).To(Equal(int64(2)), "radio artwork never reaches an external agent")
	})

	It("rejects an unknown source and names the ones in use", func() {
		err := reprocessArtwork(ctx, ds, kinds, []string{"externa:deezer"}, imageAgents, true, accept, &out)

		Expect(err).To(HaveOccurred())
		Expect(err.Error()).To(ContainSubstring("externa:deezer"))
		Expect(err.Error()).To(ContainSubstring("external:deezer"))
		Expect(err.Error()).To(ContainSubstring("folder"))
		Expect(err.Error()).To(ContainSubstring("absent"), "the empty source prints under its user-facing name")
		Expect(queue.Count()).To(BeZero())
	})

	It("accepts a source another kind uses, letting the empty selection report itself", func() {
		Expect(reprocessArtwork(ctx, ds, []model.Kind{model.KindArtistArtwork}, []string{"folder"},
			imageAgents, false, decline, &out)).To(Succeed())

		Expect(out.String()).To(ContainSubstring("Nothing matches"),
			"a well-formed filter must not be reported as a typo because of the kinds selected")
		Expect(queue.Count()).To(BeZero())
	})
})

var _ = Describe("artwork status command", func() {
	It("takes no arguments", func() {
		Expect(artworkStatusCmd.Args(artworkStatusCmd, []string{})).ToNot(HaveOccurred())
		Expect(artworkStatusCmd.Args(artworkStatusCmd, []string{"x"})).To(HaveOccurred())
	})
})

var _ = Describe("collectStatus", func() {
	var ds *tests.MockDataStore
	var art *tests.MockArtworkRepo
	var queue *tests.MockArtworkQueueRepo
	ctx := context.Background()

	BeforeEach(func() {
		ds = &tests.MockDataStore{}
		art = ds.Artwork(ctx).(*tests.MockArtworkRepo)
		queue = ds.ArtworkQueue(ctx).(*tests.MockArtworkQueueRepo)
		put := func(kind model.Kind, id, source, hash string, attempted time.Time) {
			Expect(art.PutItemArtwork(&model.ItemArtwork{ItemKind: kind.Prefix(), ItemID: id,
				ImageType: model.ImageTypePrimary, Source: source, Hash: hash, AttemptedAt: attempted})).To(Succeed())
		}
		put(model.KindArtistArtwork, "ar-1", "external:deezer", "h1", time.Now())
		put(model.KindArtistArtwork, "ar-2", "", "", time.Now().Add(-48*time.Hour))
		put(model.KindArtistArtwork, "ar-3", "", "", time.Now())
		put(model.KindAlbumArtwork, "al-1", "folder", "h2", time.Now())
		Expect(queue.Enqueue(model.ArtworkQueueItem{ItemKind: "ar", ItemID: "ar-9",
			ImageType: model.ImageTypePrimary, Priority: model.ArtworkPriorityBackfill})).To(Succeed())
	})

	It("reports the queue, the source distribution and the absent ages", func() {
		rep, err := collectStatus(ctx, ds)
		Expect(err).ToNot(HaveOccurred())

		Expect(rep.queue).To(ConsistOf(model.ArtworkQueueStat{ItemKind: "ar",
			Priority: model.ArtworkPriorityBackfill, Count: 1}))
		Expect(rep.sources).To(ContainElements(
			sourceCount{kind: model.KindArtistArtwork, source: "external:deezer", count: 1},
			sourceCount{kind: model.KindArtistArtwork, source: "", count: 2},
			sourceCount{kind: model.KindAlbumArtwork, source: "folder", count: 1},
		))
		Expect(rep.absent).To(ContainElement(absentCount{kind: model.KindArtistArtwork,
			ArtworkAbsentStat: model.ArtworkAbsentStat{Total: 2, Stale: 1}}))
	})

	It("compares the stored fingerprint against the current one", func() {
		Expect(ds.Property(ctx).Put(consts.ArtConfFingerprintPropertyKey, "old-fingerprint")).To(Succeed())

		rep, err := collectStatus(ctx, ds)
		Expect(err).ToNot(HaveOccurred())
		Expect(rep.stored).To(Equal("old-fingerprint"))
		Expect(rep.current).To(Equal(artwork.ConfigFingerprint()),
			"the CLI must report the value backfill itself compares")
	})

	It("queues nothing", func() {
		_, err := collectStatus(ctx, ds)
		Expect(err).ToNot(HaveOccurred())
		Expect(queue.Count()).To(Equal(int64(1)), "status must not enqueue anything")
	})
})

var _ = Describe("formatStatus", func() {
	var rep statusReport

	BeforeEach(func() {
		rep = statusReport{
			queue: []model.ArtworkQueueStat{
				{ItemKind: "ar", Priority: model.ArtworkPriorityBackfill, Count: 2},
				{ItemKind: "al", Priority: model.ArtworkPriorityScan, Count: 1},
			},
			sources: []sourceCount{
				{kind: model.KindArtistArtwork, source: "external:deezer", count: 5},
				{kind: model.KindArtistArtwork, source: "", count: 2},
			},
			absent: []absentCount{
				{kind: model.KindArtistArtwork, ArtworkAbsentStat: model.ArtworkAbsentStat{Total: 2, Stale: 1}},
			},
			inputs:  []artwork.FingerprintInput{{Name: "Agents", Value: "deezer,lastfm"}},
			stored:  "abc123",
			current: "abc123",
		}
	})

	// block isolates one section, so an assertion cannot be satisfied by a coincidence elsewhere.
	block := func(out, header string) string {
		GinkgoHelper()
		_, after, found := strings.Cut(out, header+"\n")
		Expect(found).To(BeTrue(), "the %q block must be printed", header)
		body, _, _ := strings.Cut(after, "\n\n")
		return body
	}

	It("names the kind and the priority of every queued row", func() {
		queue := block(formatStatus(rep), "Queue")
		Expect(queue).To(MatchRegexp(`artist\s+backfill\s+2`))
		Expect(queue).To(MatchRegexp(`album\s+scan\s+1`))
	})

	It("totals the queue", func() {
		Expect(block(formatStatus(rep), "Queue")).To(MatchRegexp(`TOTAL\s+3`))
	})

	It("counts each source, naming the empty one absent", func() {
		sources := block(formatStatus(rep), "Sources")
		Expect(sources).To(MatchRegexp(`artist\s+external:deezer\s+5`))
		Expect(sources).To(MatchRegexp(`artist\s+absent\s+2`))
	})

	It("prints the absent total and how many are due for recheck", func() {
		absent := block(formatStatus(rep), "Absent (resolved, no image found)")
		Expect(absent).To(MatchRegexp(`artist\s+2\s+1`))
	})

	It("states the recheck window the absent counts are bucketed against", func() {
		Expect(formatStatus(rep)).To(ContainSubstring("24h"))
	})

	It("leads with the queued backlog, which is the finding, not with the fingerprint verdict", func() {
		out := block(formatStatus(rep), "Backfill")
		Expect(out).To(MatchRegexp(`State:\s+backfill running: 2 items queued`),
			"an operator scanning for trouble must not read 'up to date' while 2 items churn")
		Expect(out).To(ContainSubstring("fingerprint up to date"))
	})

	It("keeps the re-enqueue warning while a backfill is already running", func() {
		rep.stored = "older"

		out := block(formatStatus(rep), "Backfill")
		Expect(out).To(MatchRegexp(`State:\s+backfill running: 2 items queued`))
		Expect(out).To(ContainSubstring("re-enqueued"),
			"the stored fingerprint is still stale, so a second full re-enqueue is pending on top of this one")
	})

	It("reports up to date only once the backfill has drained", func() {
		rep.queue = []model.ArtworkQueueStat{{ItemKind: "al", Priority: model.ArtworkPriorityScan, Count: 1}}

		Expect(block(formatStatus(rep), "Backfill")).To(MatchRegexp(`State:\s+up to date`))
	})

	It("echoes the config inputs a fingerprint change would have come from", func() {
		out := block(formatStatus(rep), "Backfill")
		Expect(out).To(MatchRegexp(`Agents:\s+deezer,lastfm`))
		Expect(out).To(ContainSubstring("abc123"), "the fingerprint values themselves must be printed")
	})

	It("reports a changed fingerprint as a pending re-resolve of everything", func() {
		rep.stored = "older"
		rep.queue = nil

		out := formatStatus(rep)
		Expect(out).To(ContainSubstring("fingerprint changed"))
		Expect(out).ToNot(ContainSubstring("up to date"))
	})

	It("reports a never-recorded fingerprint without printing an empty value", func() {
		rep.stored = ""

		out := formatStatus(rep)
		Expect(out).To(ContainSubstring("(none)"))
		Expect(out).To(ContainSubstring("fingerprint changed"))
	})

	It("says the queue is empty instead of printing a headless table", func() {
		rep.queue = nil

		out := formatStatus(rep)
		Expect(out).To(ContainSubstring("empty"))
		Expect(out).ToNot(ContainSubstring("PRIORITY"))
	})
})

var _ = Describe("refreshItems", func() {
	var ds *tests.MockDataStore
	var queue *tests.MockArtworkQueueRepo
	var art *tests.MockArtworkRepo
	var out strings.Builder
	ctx := context.Background()

	BeforeEach(func() {
		albums := tests.CreateMockAlbumRepo()
		albums.SetData(model.Albums{{ID: "al-1"}, {ID: "al-3"}})
		ds = &tests.MockDataStore{MockedAlbum: albums}
		art = ds.Artwork(ctx).(*tests.MockArtworkRepo)
		queue = ds.ArtworkQueue(ctx).(*tests.MockArtworkQueueRepo)
		out.Reset()
	})

	It("clears the stored state and queues each id at Bump priority", func() {
		Expect(art.PutItemArtwork(&model.ItemArtwork{ItemKind: model.KindAlbumArtwork.Prefix(),
			ItemID: "al-1", ImageType: model.ImageTypePrimary, Hash: "abc123"})).To(Succeed())

		Expect(refreshItems(ctx, ds, model.KindAlbumArtwork, []string{"al-1", "al-3"}, &out)).To(BeZero())

		_, err := art.GetItemArtwork(model.KindAlbumArtwork, "al-1", model.ImageTypePrimary)
		Expect(err).To(MatchError(model.ErrNotFound))
		queued, err := queue.Get(model.KindAlbumArtwork, "al-1", model.ImageTypePrimary)
		Expect(err).ToNot(HaveOccurred())
		Expect(queued.Priority).To(Equal(model.ArtworkPriorityBump))
		Expect(out.String()).To(Equal("al/al-1: queued\nal/al-3: queued\n"))
	})

	It("skips an id that does not exist instead of queuing it", func() {
		Expect(refreshItems(ctx, ds, model.KindAlbumArtwork, []string{"al-2"}, &out)).To(Equal(1))

		_, err := queue.Get(model.KindAlbumArtwork, "al-2", model.ImageTypePrimary)
		Expect(err).To(MatchError(model.ErrNotFound), "a typo must not leave an orphan queue row")
		Expect(out.String()).To(BeEmpty())
	})

	It("continues past a failing id and counts the failures", func() {
		Expect(refreshItems(ctx, ds, model.KindAlbumArtwork,
			[]string{"al-1", "al-2", "al-3"}, &out)).To(Equal(1))

		Expect(out.String()).To(Equal("al/al-1: queued\nal/al-3: queued\n"),
			"the ids after a failure are still refreshed")
	})
})