// Copyright 2010 The Go Authors.  All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package http

import (
	"bytes"
	"fmt"
	"json"
	"os"
	"reflect"
	"testing"
	"time"
)

var writeSetCookiesTests = []struct {
	Cookies []*Cookie
	Raw     string
}{
	{
		[]*Cookie{
			&Cookie{Name: "cookie-1", Value: "v$1"},
			&Cookie{Name: "cookie-2", Value: "two", MaxAge: 3600},
			&Cookie{Name: "cookie-3", Value: "three", Domain: ".example.com"},
			&Cookie{Name: "cookie-4", Value: "four", Path: "/restricted/"},
		},
		"Set-Cookie: cookie-1=v$1\r\n" +
			"Set-Cookie: cookie-2=two; Max-Age=3600\r\n" +
			"Set-Cookie: cookie-3=three; Domain=.example.com\r\n" +
			"Set-Cookie: cookie-4=four; Path=/restricted/\r\n",
	},
}

func TestWriteSetCookies(t *testing.T) {
	for i, tt := range writeSetCookiesTests {
		var w bytes.Buffer
		writeSetCookies(&w, tt.Cookies)
		seen := string(w.Bytes())
		if seen != tt.Raw {
			t.Errorf("Test %d, expecting:\n%s\nGot:\n%s\n", i, tt.Raw, seen)
			continue
		}
	}
}

type headerOnlyResponseWriter Header

func (ho headerOnlyResponseWriter) Header() Header {
	return Header(ho)
}

func (ho headerOnlyResponseWriter) Write([]byte) (int, os.Error) {
	panic("NOIMPL")
}

func (ho headerOnlyResponseWriter) WriteHeader(int) {
	panic("NOIMPL")
}

func TestSetCookie(t *testing.T) {
	m := make(Header)
	SetCookie(headerOnlyResponseWriter(m), &Cookie{Name: "cookie-1", Value: "one", Path: "/restricted/"})
	SetCookie(headerOnlyResponseWriter(m), &Cookie{Name: "cookie-2", Value: "two", MaxAge: 3600})
	if l := len(m["Set-Cookie"]); l != 2 {
		t.Fatalf("expected %d cookies, got %d", 2, l)
	}
	if g, e := m["Set-Cookie"][0], "cookie-1=one; Path=/restricted/"; g != e {
		t.Errorf("cookie #1: want %q, got %q", e, g)
	}
	if g, e := m["Set-Cookie"][1], "cookie-2=two; Max-Age=3600"; g != e {
		t.Errorf("cookie #2: want %q, got %q", e, g)
	}
}

var writeCookiesTests = []struct {
	Cookies []*Cookie
	Raw     string
}{
	{
		[]*Cookie{},
		"",
	},
	{
		[]*Cookie{&Cookie{Name: "cookie-1", Value: "v$1"}},
		"Cookie: cookie-1=v$1\r\n",
	},
	{
		[]*Cookie{
			&Cookie{Name: "cookie-1", Value: "v$1"},
			&Cookie{Name: "cookie-2", Value: "v$2"},
			&Cookie{Name: "cookie-3", Value: "v$3"},
		},
		"Cookie: cookie-1=v$1; cookie-2=v$2; cookie-3=v$3\r\n",
	},
}

func TestWriteCookies(t *testing.T) {
	for i, tt := range writeCookiesTests {
		var w bytes.Buffer
		writeCookies(&w, tt.Cookies)
		seen := string(w.Bytes())
		if seen != tt.Raw {
			t.Errorf("Test %d, expecting:\n%s\nGot:\n%s\n", i, tt.Raw, seen)
			continue
		}
	}
}

var readSetCookiesTests = []struct {
	Header  Header
	Cookies []*Cookie
}{
	{
		Header{"Set-Cookie": {"Cookie-1=v$1"}},
		[]*Cookie{&Cookie{Name: "Cookie-1", Value: "v$1", Raw: "Cookie-1=v$1"}},
	},
	{
		Header{"Set-Cookie": {"NID=99=YsDT5i3E-CXax-; expires=Wed, 23-Nov-2011 01:05:03 GMT; path=/; domain=.google.ch; HttpOnly"}},
		[]*Cookie{&Cookie{
			Name:       "NID",
			Value:      "99=YsDT5i3E-CXax-",
			Path:       "/",
			Domain:     ".google.ch",
			HttpOnly:   true,
			Expires:    time.Time{Year: 2011, Month: 11, Day: 23, Hour: 1, Minute: 5, Second: 3, Weekday: 3, ZoneOffset: 0, Zone: "GMT"},
			RawExpires: "Wed, 23-Nov-2011 01:05:03 GMT",
			Raw:        "NID=99=YsDT5i3E-CXax-; expires=Wed, 23-Nov-2011 01:05:03 GMT; path=/; domain=.google.ch; HttpOnly",
		}},
	},
}

func toJSON(v interface{}) string {
	b, err := json.Marshal(v)
	if err != nil {
		return fmt.Sprintf("%#v", v)
	}
	return string(b)
}

func TestReadSetCookies(t *testing.T) {
	for i, tt := range readSetCookiesTests {
		c := readSetCookies(tt.Header)
		if !reflect.DeepEqual(c, tt.Cookies) {
			t.Errorf("#%d readSetCookies: have\n%s\nwant\n%s\n", i, toJSON(c), toJSON(tt.Cookies))
			continue
		}
	}
}

var readCookiesTests = []struct {
	Header  Header
	Cookies []*Cookie
}{
	{
		Header{"Cookie": {"Cookie-1=v$1"}},
		[]*Cookie{&Cookie{Name: "Cookie-1", Value: "v$1"}},
	},
}

func TestReadCookies(t *testing.T) {
	for i, tt := range readCookiesTests {
		c := readCookies(tt.Header)
		if !reflect.DeepEqual(c, tt.Cookies) {
			t.Errorf("#%d readCookies: have\n%s\nwant\n%s\n", i, toJSON(c), toJSON(tt.Cookies))
			continue
		}
	}
}