package musicbrainz

import (
	"context"
	"github.com/google/uuid"
	"github.com/stretchr/testify/require"
	"net/http"
	"net/http/httptest"
	"net/url"
	"strings"
	"testing"
	"time"
)

type memoryCache map[string][]byte

func (m memoryCache) GetMetadataCache(_ context.Context, key string) ([]byte, bool, error) {
	b, ok := m[key]
	return b, ok, nil
}
func (m memoryCache) PutMetadataCache(_ context.Context, key string, b []byte, _ time.Duration) error {
	m[key] = b
	return nil
}
func TestLookupParsesEditionTracksAndCachesRequests(t *testing.T) {
	id := uuid.NewString()
	requests := 0
	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		requests++
		require.Equal(t, "PipuTest/1 (test@example.org)", r.UserAgent())
		w.Header().Set("Content-Type", "application/json")
		if r.URL.Path == "/release" {
			require.Contains(t, r.URL.Query().Get("query"), `release:"Album"`)
			_, _ = w.Write([]byte(`{"releases":[{"id":"` + id + `"}]}`))
			return
		}
		require.Equal(t, "recordings+artist-credits+release-groups", r.URL.Query().Get("inc"))
		_, _ = w.Write([]byte(`{"id":"` + id + `","title":"Album","date":"2024-01-01","country":"XE","artist-credit":[{"name":"Artist"}],"release-group":{"id":"` + uuid.NewString() + `","primary-type":"Single"},"media":[{"position":1,"tracks":[{"position":1,"recording":{"id":"recording","title":"Song","length":180000}}]}]}`))
	}))
	defer server.Close()
	c := New(memoryCache{}, "PipuTest/1 (test@example.org)")
	c.base = server.URL
	c.interval = 0
	for range 2 {
		result, err := c.Search(context.Background(), Query{Artist: "Artist", Album: "Album"})
		require.NoError(t, err)
		require.Len(t, result, 1)
		require.Equal(t, "Single", result[0].Type)
		require.Equal(t, "Artist", result[0].Tracks[0].Artist)
		require.Equal(t, 180000, result[0].Tracks[0].DurationMs)
	}
	require.Equal(t, 2, requests)
}

func TestRecordingLookupRanksEditionsAndBoundsDiscovery(t *testing.T) {
	id, other := uuid.NewString(), uuid.NewString()
	lookups, details := 0, 0
	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		if r.URL.Path == "/release" {
			lookups++
			require.NotEmpty(t, r.URL.Query().Get("recording"))
			require.Equal(t, "100", r.URL.Query().Get("limit"))
			if lookups == 1 {
				_, _ = w.Write([]byte(`{"releases":[{"id":"` + other + `"},{"id":"` + id + `"}]}`))
			} else {
				_, _ = w.Write([]byte(`{"releases":[{"id":"` + id + `"}]}`))
			}
			return
		}
		details++
		releaseID := strings.TrimPrefix(r.URL.Path, "/release/")
		_, _ = w.Write([]byte(`{"id":"` + releaseID + `","media":[{"position":1,"tracks":[{"position":1,"title":"Song","length":180000}]}]}`))
	}))
	defer server.Close()
	c := New(memoryCache{}, "test")
	c.base = server.URL
	c.interval = 0
	ids := []string{}
	for range 12 {
		ids = append(ids, uuid.NewString())
	}
	ids = append([]string{ids[0]}, ids...)
	releases, err := c.Search(context.Background(), Query{RecordingIDs: ids})
	require.NoError(t, err)
	require.Len(t, releases, 2)
	require.Equal(t, id, releases[0].ID)
	require.Equal(t, 8, lookups)
	require.Equal(t, 2, details)
}
func TestCoverFallbackIsExplicitAndRedirectsAreRestricted(t *testing.T) {
	r := Release{ID: uuid.NewString(), GroupID: uuid.NewString()}
	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
		if strings.HasPrefix(req.URL.Path, "/release/") {
			w.WriteHeader(404)
			return
		}
		_, _ = w.Write([]byte{0xff, 0xd8, 0xff, 1})
	}))
	defer server.Close()
	c := New(memoryCache{}, "test")
	c.coverBase = server.URL
	cover, err := c.Cover(context.Background(), r)
	require.NoError(t, err)
	require.False(t, cover.Exact)
	require.Contains(t, cover.URL, "/release-group/")
	for _, address := range []string{"http://archive.org/a", "https://127.0.0.1/a", "https://archive.org.evil.example/a", "https://archive.org:1234/a"} {
		u, _ := url.Parse(address)
		require.Error(t, c.http.CheckRedirect(&http.Request{URL: u}, nil))
	}
}
func TestLookupRateWaitCanBeCancelledAndResponsesAreBounded(t *testing.T) {
	c := New(memoryCache{}, "test")
	c.next = time.Now().Add(time.Second)
	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Millisecond)
	defer cancel()
	_, err := c.Search(ctx, Query{Artist: "Artist", Album: "Album"})
	require.ErrorIs(t, err, context.DeadlineExceeded)
	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { _, _ = w.Write([]byte(strings.Repeat("x", 100))) }))
	defer server.Close()
	_, err = c.get(context.Background(), server.URL, false, 16)
	require.ErrorContains(t, err, "too large")
}