package xmpp

import (

	"bytes"

	"encoding/xml"

	"reflect"

	"strings"

	"sync"

	"testing"

)

func TestReadError(t *testing.T) {

	r := strings.NewReader(`<stream:error><bad-foo xmlns="blah"/>` +

		`</stream:error>`)

	ch := make(chan interface{})

	go readXml(r, ch, make(map[xml.Name]reflect.Type))

	x := <-ch

	se, ok := x.(*streamError)

	if !ok {

		t.Fatalf("not StreamError: %T", x)

	}

	assertEquals(t, "bad-foo", se.Any.XMLName.Local)

	assertEquals(t, "blah", se.Any.XMLName.Space)

	if se.Text != nil {

		t.Errorf("text not nil: %v", se.Text)

	}

	r = strings.NewReader(`<stream:error><bad-foo xmlns="blah"/>` +

		`<text xml:lang="en" xmlns="` + NsStreams +

		`">Error text</text></stream:error>`)

	ch = make(chan interface{})

	go readXml(r, ch, make(map[xml.Name]reflect.Type))

	x = <-ch

	se, ok = x.(*streamError)

	if !ok {

		t.Fatalf("not StreamError: %v", reflect.TypeOf(x))

	}

	assertEquals(t, "bad-foo", se.Any.XMLName.Local)

	assertEquals(t, "blah", se.Any.XMLName.Space)

	assertEquals(t, "Error text", se.Text.Text)

	assertEquals(t, "en", se.Text.Lang)

}

func TestReadStream(t *testing.T) {

	r := strings.NewReader(`<stream:stream to="foo.com" ` +

		`from="bar.org" id="42"` +

		`xmlns="` + NsClient + `" xmlns:stream="` + NsStream +

		`" version="1.0">`)

	ch := make(chan interface{})

	go readXml(r, ch, make(map[xml.Name]reflect.Type))

	x := <-ch

	ss, ok := x.(*stream)

	if !ok {

		t.Fatalf("not stream: %v", reflect.TypeOf(x))

	}

	assertEquals(t, "foo.com", ss.To)

	assertEquals(t, "bar.org", ss.From)

	assertEquals(t, "42", ss.Id)

	assertEquals(t, "1.0", ss.Version)

}

func testWrite(obj interface{}) string {

	w := bytes.NewBuffer(nil)

	ch := make(chan interface{})

	var wg sync.WaitGroup

	wg.Add(1)

	go func() {

		defer wg.Done()

		writeXml(w, ch)

	}()

	ch <- obj

	close(ch)

	wg.Wait()

	return w.String()

}

func TestWriteError(t *testing.T) {

	se := &streamError{Any: Generic{XMLName: xml.Name{Local: "blah"}}}

	str := testWrite(se)

	exp := `<error xmlns="` + NsStream + `"><blah></blah></error>`

	assertEquals(t, exp, str)

	se = &streamError{Any: Generic{XMLName: xml.Name{Space: NsStreams, Local: "foo"}}, Text: &errText{Lang: "ru", Text: "Пошёл ты"}}

	str = testWrite(se)

	exp = `<error xmlns="` + NsStream + `"><foo xmlns="` + NsStreams +

		`"></foo><text xmlns="` + NsStreams +

		`" xml:lang="ru">Пошёл ты</text></error>`

	assertEquals(t, exp, str)

}

func TestWriteStream(t *testing.T) {

	ss := &stream{To: "foo.org", From: "bar.com", Id: "42", Lang: "en", Version: "1.0"}

	str := testWrite(ss)

	exp := `<stream:stream xmlns="` + NsClient +

		`" xmlns:stream="` + NsStream + `" to="foo.org"` +

		` from="bar.com" id="42" xml:lang="en" version="1.0">`

	assertEquals(t, exp, str)

}