package subsonic

import (
	"encoding/json"
	"encoding/xml"
	"strings"
	"testing"

	"git.fabledsword.com/bvandeusen/minstrel/internal/db/dbq"
	"git.fabledsword.com/bvandeusen/minstrel/internal/library"
)

// OpenSubsonic's replayGain is an object in JSON and an element with
// attributes in XML. Clients parse both, so both are pinned (#4997).
func TestSongRef_ReplayGainEncodesForBothFormats(t *testing.T) {
	gain, peak := float32(-4.5), float32(0.8913)
	tr := dbq.Track{Title: "Song", FilePath: "/m/a.flac", FileFormat: "flac"}
	s := songRef(tr, "Album", "Artist", library.ReplayGain{TrackGain: &gain, TrackPeak: &peak})

	b, err := json.Marshal(s)
	if err != nil {
		t.Fatal(err)
	}
	var m map[string]any
	if err := json.Unmarshal(b, &m); err != nil {
		t.Fatal(err)
	}
	rg, ok := m["replayGain"].(map[string]any)
	if !ok {
		t.Fatalf("JSON has no replayGain object: %s", b)
	}
	if rg["trackGain"] != -4.5 || rg["trackPeak"] == nil {
		t.Errorf("JSON replayGain = %v, want trackGain -4.5 and a trackPeak", rg)
	}
	if _, ok := rg["albumGain"]; ok {
		t.Errorf("JSON replayGain carries albumGain with no album value: %v", rg)
	}

	x, err := xml.Marshal(s)
	if err != nil {
		t.Fatal(err)
	}
	if !strings.Contains(string(x), `<replayGain trackGain="-4.5" trackPeak="0.8913"></replayGain>`) {
		t.Errorf("XML lacks the replayGain element: %s", x)
	}
}

func TestSongRef_NoReplayGainWhenUnmeasured(t *testing.T) {
	s := songRef(dbq.Track{Title: "Song", FilePath: "/m/a.mp3"}, "Album", "Artist", library.ReplayGain{})
	if s.ReplayGain != nil {
		t.Fatalf("unmeasured song carries replayGain %+v", s.ReplayGain)
	}
	b, _ := json.Marshal(s)
	x, _ := xml.Marshal(s)
	if strings.Contains(string(b), "replayGain") || strings.Contains(string(x), "replayGain") {
		t.Errorf("unmeasured song encodes replayGain: %s / %s", b, x)
	}
}