package main

import (
	"bytes"
	"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 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.lyricsEndpoint = server.URL
	_, err := client.Lyrics("0004jPDk2eB2dt")
	if err == nil || !strings.Contains(err.Error(), "safety limit") {
		t.Fatalf("expected response limit error, got %v", err)
	}
}