package main

import (
	"bytes"
	"encoding/base64"
	"encoding/json"
	"net/http"
	"net/http/httptest"
	"strings"
	"testing"
)

func TestUnwrapJSONP(t *testing.T) {
	got := unwrapJSONP([]byte(" callback_1( {\"code\":0} ); "))
	if string(got) != `{"code":0}` {
		t.Fatalf("unexpected JSONP body: %q", got)
	}
}

func TestQQClientMusicuLyricsRequestsTranslationAndPhonetics(t *testing.T) {
	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		if r.Method != http.MethodPost || r.Header.Get("Content-Type") != "application/json" {
			t.Fatalf("unexpected request: %s %s", r.Method, r.Header.Get("Content-Type"))
		}
		var body struct {
			Request struct {
				Module string `json:"module"`
				Method string `json:"method"`
				Param  struct {
					MID   string `json:"songMID"`
					Trans int    `json:"trans"`
					Roma  int    `json:"roma"`
					QRC   int    `json:"qrc"`
				} `json:"param"`
			} `json:"req_1"`
		}
		if err := json.NewDecoder(r.Body).Decode(&body); err != nil {
			t.Fatal(err)
		}
		if body.Request.Module != "music.musichallSong.PlayLyricInfo" || body.Request.Method != "GetPlayLyricInfo" || body.Request.Param.MID != "0004jPDk2eB2dt" {
			t.Fatalf("unexpected request body: %#v", body)
		}
		if body.Request.Param.Trans != 1 || body.Request.Param.Roma != 1 || body.Request.Param.QRC != 0 {
			t.Fatalf("required lyric variants were not requested: %#v", body.Request.Param)
		}
		lyric := base64.StdEncoding.EncodeToString([]byte("[00:01.00]原文"))
		trans := base64.StdEncoding.EncodeToString([]byte("[00:01.00]translation"))
		_, _ = w.Write([]byte(`{"code":0,"req_1":{"code":0,"data":{"lyric":"` + lyric + `","trans":"` + trans + `"}}}`))
	}))
	defer server.Close()

	client := newQQClient()
	client.musicuEndpoint = server.URL
	result, err := client.musicuLyrics("0004jPDk2eB2dt")
	if err != nil {
		t.Fatal(err)
	}
	if result.Lyric != "[00:01.00]原文" || result.Trans != "[00:01.00]translation" {
		t.Fatalf("unexpected lyrics: %#v", result)
	}
}

func TestQQClientSearchUsesFixedShape(t *testing.T) {
	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		if r.Header.Get("Origin") != "https://y.qq.com" || r.Header.Get("Referer") != "https://y.qq.com/" {
			t.Fatal("required upstream headers were not set")
		}
		if r.URL.Query().Get("w") != "起风了" || r.URL.Query().Get("n") != "2" {
			t.Fatalf("unexpected query: %s", r.URL.RawQuery)
		}
		_, _ = w.Write([]byte(`{"code":0,"data":{"song":{"list":[{"songname":"歌","songmid":"0004jPDk2eB2dt","albumname":"专辑","interval":215,"singer":[{"name":"歌手"}]}]}}}`))
	}))
	defer server.Close()

	client := newQQClient()
	client.searchEndpoint = server.URL
	songs, err := client.Search("起风了", 2)
	if err != nil {
		t.Fatal(err)
	}
	if len(songs) != 1 || songs[0].MID != "0004jPDk2eB2dt" || songs[0].Singer != "歌手" {
		t.Fatalf("unexpected songs: %#v", songs)
	}
}

func TestQQClientRejectsOversizedResponse(t *testing.T) {
	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, _ *http.Request) {
		_, _ = w.Write(bytes.Repeat([]byte("x"), maxUpstreamBytes+1))
	}))
	defer server.Close()
	client := newQQClient()
	client.musicuEndpoint = server.URL
	_, err := client.musicuLyrics("0004jPDk2eB2dt")
	if err == nil || !strings.Contains(err.Error(), "safety limit") {
		t.Fatalf("expected response limit error, got %v", err)
	}
}