package tidal

import (
	"context"
	"encoding/base64"
	"encoding/json"
	"net/http"
	"net/http/httptest"
	"strconv"
	"testing"

	"streamrip-go/internal/config"
)

func TestLoginMissingToken(t *testing.T) {
	cfgData := config.DefaultConfigData()
	cfgData.Tidal.AccessToken = ""
	c := New(&config.Config{File: cfgData, Session: cfgData})
	err := c.Login(context.Background())
	if err == nil {
		t.Fatalf("expected error")
	}
}

func TestSearch(t *testing.T) {
	ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		switch r.URL.Path {
		case "/v1/sessions":
			_ = json.NewEncoder(w).Encode(map[string]any{"countryCode": "US", "userId": 123})
		case "/v1/search/albums":
			_ = json.NewEncoder(w).Encode(map[string]any{"items": []any{map[string]any{"id": 1, "title": "x"}}})
		default:
			w.WriteHeader(http.StatusNotFound)
		}
	}))
	defer ts.Close()

	cfgData := config.DefaultConfigData()
	cfgData.Tidal.AccessToken = "token"
	cfgData.Tidal.CountryCode = "US"
	c := New(&config.Config{File: cfgData, Session: cfgData})
	c.baseURL = ts.URL + "/v1"

	if err := c.Login(context.Background()); err != nil {
		t.Fatalf("login err = %v", err)
	}
	pages, err := c.Search(context.Background(), "album", "x", 10)
	if err != nil {
		t.Fatalf("search err = %v", err)
	}
	if len(pages) != 1 {
		t.Fatalf("pages = %d", len(pages))
	}
}

func TestGetVideoDownloadable(t *testing.T) {
	var server *httptest.Server
	server = httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		switch r.URL.Path {
		case "/v1/sessions":
			_ = json.NewEncoder(w).Encode(map[string]any{"countryCode": "US", "userId": 123})
		case "/v1/videos/42/playbackinfopostpaywall":
			manifest := map[string]any{"urls": []string{server.URL + "/master.m3u8"}}
			b, _ := json.Marshal(manifest)
			_ = json.NewEncoder(w).Encode(map[string]any{"manifest": base64.StdEncoding.EncodeToString(b)})
		case "/master.m3u8":
			_, _ = w.Write([]byte("#EXTM3U\n#EXT-X-STREAM-INF:BANDWIDTH=1000,CODECS=\"avc1.42E01E,mp4a.40.2\",RESOLUTION=640x360\nlow/stream.m3u8\n#EXT-X-STREAM-INF:BANDWIDTH=2000,CODECS=\"avc1.4D401F,mp4a.40.2\",RESOLUTION=1280x720\nhi/stream.m3u8\n"))
		default:
			w.WriteHeader(http.StatusNotFound)
		}
	}))
	defer server.Close()

	cfgData := config.DefaultConfigData()
	cfgData.Tidal.AccessToken = "token"
	cfgData.Tidal.CountryCode = "US"
	c := New(&config.Config{File: cfgData, Session: cfgData})
	c.baseURL = server.URL + "/v1"

	if err := c.Login(context.Background()); err != nil {
		t.Fatalf("login err = %v", err)
	}
	d, err := c.GetVideoDownloadable(context.Background(), "42")
	if err != nil {
		t.Fatalf("GetVideoDownloadable() err = %v", err)
	}
	if d.Extension != "mp4" {
		t.Fatalf("extension = %q, want mp4", d.Extension)
	}
	if d.URL != server.URL+"/hi/stream.m3u8" {
		t.Fatalf("url = %q, want %q", d.URL, server.URL+"/hi/stream.m3u8")
	}
}

func TestBestHLSVariantURLFallsBackToMaster(t *testing.T) {
	master := "https://example.com/master.m3u8"
	got := bestHLSVariantURL(master, "#EXTM3U\n#comment")
	if got != master {
		t.Fatalf("url = %q, want %q", got, master)
	}
}

func TestGetMetadataArtistPaginatesAlbums(t *testing.T) {
	ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		switch r.URL.Path {
		case "/v1/sessions":
			_ = json.NewEncoder(w).Encode(map[string]any{"countryCode": "US", "userId": 123})
		case "/v1/artists/9":
			_ = json.NewEncoder(w).Encode(map[string]any{"id": 9, "name": "Artist X"})
		case "/v1/artists/9/albums":
			offset, _ := strconv.Atoi(r.URL.Query().Get("offset"))
			filter := r.URL.Query().Get("filter")
			if filter == "" {
				if offset == 0 {
					items := make([]any, 0, 100)
					for i := 0; i < 100; i++ {
						items = append(items, map[string]any{"id": i + 1})
					}
					_ = json.NewEncoder(w).Encode(map[string]any{"items": items})
					return
				}
				if offset == 100 {
					_ = json.NewEncoder(w).Encode(map[string]any{"items": []any{map[string]any{"id": 101}}})
					return
				}
				_ = json.NewEncoder(w).Encode(map[string]any{"items": []any{}})
				return
			}
			if filter == "EPSANDSINGLES" {
				if offset == 0 {
					_ = json.NewEncoder(w).Encode(map[string]any{"items": []any{map[string]any{"id": 101}, map[string]any{"id": 102}}})
					return
				}
				_ = json.NewEncoder(w).Encode(map[string]any{"items": []any{}})
				return
			}
			w.WriteHeader(http.StatusBadRequest)
		default:
			w.WriteHeader(http.StatusNotFound)
		}
	}))
	defer ts.Close()

	cfgData := config.DefaultConfigData()
	cfgData.Tidal.AccessToken = "token"
	cfgData.Tidal.CountryCode = "US"
	c := New(&config.Config{File: cfgData, Session: cfgData})
	c.baseURL = ts.URL + "/v1"

	if err := c.Login(context.Background()); err != nil {
		t.Fatalf("login err = %v", err)
	}
	meta, err := c.GetMetadata(context.Background(), "9", "artist")
	if err != nil {
		t.Fatalf("GetMetadata() err = %v", err)
	}
	albumsObj, _ := meta["albums"].(map[string]any)
	items, _ := albumsObj["items"].([]map[string]any)
	if len(items) != 102 {
		t.Fatalf("albums len = %d, want 102", len(items))
	}
}