package api

import (
	"context"
	"encoding/json"
	"net/http"
	"net/http/httptest"
	"strings"
	"testing"

	"github.com/go-chi/chi/v5"

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

func TestGetReplayGain(t *testing.T) {
	h, pool := testHandlers(t)
	user := seedUser(t, pool, "rg1", "pw", false)
	measured, _ := seedTrackForRemoveTest(t, h, "rg-measured", "", "")
	unmeasured, _ := seedTrackForRemoveTest(t, h, "rg-unmeasured", "", "")
	lufs, peak := float32(-12.5), float32(-1)
	if err := dbq.New(pool).UpsertTrackLoudness(context.Background(), dbq.UpsertTrackLoudnessParams{
		TrackID: measured.ID, IntegratedLufs: &lufs, TruePeakDbtp: &peak, AnalysisVersion: 1,
	}); err != nil {
		t.Fatalf("seed loudness: %v", err)
	}
	r := chi.NewRouter()
	r.Get("/api/tracks/replay-gain", h.handleGetReplayGain)
	get := func(query string) *httptest.ResponseRecorder {
		req := withUser(httptest.NewRequest(http.MethodGet, "/api/tracks/replay-gain"+query, nil), user)
		rec := httptest.NewRecorder()
		r.ServeHTTP(rec, req)
		return rec
	}

	rec := get("?ids=" + uuidToString(measured.ID) + "," + uuidToString(unmeasured.ID) + ",not-a-uuid")
	if rec.Code != http.StatusOK {
		t.Fatalf("status = %d; body=%s", rec.Code, rec.Body.String())
	}
	var resp struct {
		Items map[string]struct {
			TrackGain *float32 `json:"track_gain"`
			TrackPeak *float32 `json:"track_peak"`
			AlbumGain *float32 `json:"album_gain"`
		} `json:"items"`
	}
	if err := json.Unmarshal(rec.Body.Bytes(), &resp); err != nil {
		t.Fatalf("decode: %v", err)
	}
	g, ok := resp.Items[uuidToString(measured.ID)]
	if !ok || g.TrackGain == nil || *g.TrackGain != -5.5 || g.TrackPeak == nil {
		t.Errorf("measured track = %+v (present %v), want track_gain -5.5 with a peak", g, ok)
	}
	if g.AlbumGain != nil {
		t.Errorf("album_gain present with no album loudness: %v", *g.AlbumGain)
	}
	if _, ok := resp.Items[uuidToString(unmeasured.ID)]; ok {
		t.Errorf("unmeasured track listed; absent means no adjustment")
	}
	if len(resp.Items) != 1 {
		t.Errorf("items = %v, want only the measured track", resp.Items)
	}

	if rec := get(""); rec.Code != http.StatusOK || !strings.Contains(rec.Body.String(), `"items":{}`) {
		t.Errorf("no ids: %d %s, want 200 with empty items", rec.Code, rec.Body.String())
	}
	if rec := get("?ids=" + strings.Repeat("x,", maxReplayGainIDs)); rec.Code != http.StatusBadRequest {
		t.Errorf("%d ids: status %d, want 400", maxReplayGainIDs+1, rec.Code)
	}
}