package yandex

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

	"streamrip-go/internal/config"
	"streamrip-go/internal/jsonutil"
)

func TestYandexDownloadSignMatchesCapturedFormat(t *testing.T) {
	sign, ts := yandexDownloadSign("32038184", "lossless", []string{"flac", "aac", "he-aac", "mp3", "flac-mp4", "aac-mp4", "he-aac-mp4"}, "raw")
	if ts <= 0 {
		t.Fatalf("timestamp = %d", ts)
	}
	if strings.TrimSpace(sign) == "" {
		t.Fatalf("decoded sign is empty")
	}
	if strings.Contains(sign, "=") {
		t.Fatalf("sign unexpectedly contains base64 padding: %q", sign)
	}
	if strings.Contains(sign, " ") {
		t.Fatalf("sign unexpectedly contains space: %q", sign)
	}
}

func TestGetDownloadableUsesModernGetFileInfo(t *testing.T) {
	var gotPath string
	var gotQuery url.Values
	ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		gotPath = r.URL.Path
		gotQuery = r.URL.Query()
		if r.URL.Path == "/account/about" {
			_ = json.NewEncoder(w).Encode(map[string]any{"result": map[string]any{"uid": "123"}})
			return
		}
		if r.URL.Path != "/get-file-info" {
			w.WriteHeader(http.StatusNotFound)
			return
		}
		_ = json.NewEncoder(w).Encode(map[string]any{
			"result": map[string]any{
				"downloadInfo": map[string]any{
					"trackId": "32038184",
					"quality": "lossless",
					"codec":   "flac-mp4",
					"transport": "encraw",
					"key": "00112233445566778899aabbccddeeff",
					"bitrate": 0,
					"url":     "https://strm.example/music-v2/crypt/x/flac-mp4",
				},
			},
		})
	}))
	defer ts.Close()

	d := config.DefaultConfigData()
	d.Downloads.RequestsPerMinute = 0
	d.Yandex.AccessToken = "token"
	c := New(&config.Config{File: d, Session: d})
	c.baseURL = ts.URL
	c.loggedIn = true

	dl, err := c.GetDownloadable(context.Background(), "32038184:1683700", 2)
	if err != nil {
		t.Fatalf("GetDownloadable() error = %v", err)
	}
	if gotPath != "/get-file-info" {
		t.Fatalf("path = %q, want /get-file-info", gotPath)
	}
	if gotQuery.Get("trackId") != "32038184" {
		t.Fatalf("trackId = %q, want 32038184", gotQuery.Get("trackId"))
	}
	if gotQuery.Get("quality") != "lossless" {
		t.Fatalf("quality = %q, want lossless", gotQuery.Get("quality"))
	}
	if gotQuery.Get("transports") != "encraw" {
		t.Fatalf("transports = %q, want encraw", gotQuery.Get("transports"))
	}
	if dl.Extension != "m4a" {
		t.Fatalf("extension = %q, want m4a", dl.Extension)
	}
	if dl.Audio.Codec != "FLAC" || dl.Audio.Quality != "LOSSLESS" {
		t.Fatalf("unexpected audio profile: %+v", dl.Audio)
	}
	if dl.TrackID != "32038184" {
		t.Fatalf("track id = %q, want 32038184", dl.TrackID)
	}
	if dl.Cipher != "AES_CTR" || dl.Key == "" {
		t.Fatalf("expected yandex cipher metadata, got cipher=%q key=%q", dl.Cipher, dl.Key)
	}
}

func TestGetMetadataTrackUsesModernTracksEndpoint(t *testing.T) {
	var gotMethod string
	var gotPath string
	var gotBody string
	ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		gotMethod = r.Method
		gotPath = r.URL.Path
		if r.URL.Path != "/tracks" {
			w.WriteHeader(http.StatusNotFound)
			return
		}
		body, _ := io.ReadAll(r.Body)
		gotBody = string(body)
		_ = json.NewEncoder(w).Encode(map[string]any{
			"result": []map[string]any{{
				"id":      "9442712",
				"realId":  "9442712",
				"title":   "Nightcall",
				"artists": []map[string]any{{"id": "1433871", "name": "Kavinsky"}},
				"albums": []map[string]any{{
					"id":          "1000856",
					"title":       "OutRun",
					"releaseDate": "2013-02-25T00:00:00+04:00",
					"trackCount":  13,
					"artists":     []map[string]any{{"id": "1433871", "name": "Kavinsky"}},
					"trackPosition": map[string]any{
						"index":  0,
						"volume": 1,
					},
				}},
			}},
		})
	}))
	defer ts.Close()

	d := config.DefaultConfigData()
	d.Downloads.RequestsPerMinute = 0
	d.Yandex.AccessToken = "token"
	c := New(&config.Config{File: d, Session: d})
	c.baseURL = ts.URL
	c.loggedIn = true

	meta, err := c.GetMetadata(context.Background(), "9442712:1000856", "track")
	if err != nil {
		t.Fatalf("GetMetadata() error = %v", err)
	}
	if gotMethod != http.MethodPost || gotPath != "/tracks" {
		t.Fatalf("unexpected request: %s %s", gotMethod, gotPath)
	}
	if !strings.Contains(gotBody, "trackIds=9442712%3A1000856") {
		t.Fatalf("body = %q", gotBody)
	}
	if meta["id"] != "9442712:1000856" {
		t.Fatalf("id = %v", meta["id"])
	}
	if album, _ := meta["album"].(map[string]any); jsonutil.StringFromAny(album["title"]) != "OutRun" {
		t.Fatalf("unexpected album: %+v", album)
	}
}

func TestLegacyDirectURLBuildsPlayableMP3URL(t *testing.T) {
	url, err := legacyDirectURL(&legacyDownloadInfoXML{
		Host: "example.test",
		Path: "/abc123",
		TS:   "1234567890",
		S:    "tailxyz",
	})
	if err != nil {
		t.Fatalf("legacyDirectURL() error = %v", err)
	}
	want := "https://example.test/get-mp3/248c1c6ff5daf481560d3bd9f24e8058/1234567890/abc123"
	if url != want {
		t.Fatalf("legacyDirectURL() = %q, want %q", url, want)
	}
}