package request

import (
	"io"
	"bytes"
	"testing"
)
// /* (1) Parse request */
// req, _ := request.Parse(s)

// /* (3) Build response */
// res := req.BuildResponse()

// /* (4) Write into socket */
// _, err := res.Send(s)
// if err != nil {
// 	return nil, fmt.Errorf("Upgrade write error: %s", err)
// }

// if res.GetStatusCode() != 101 {
// 	s.Close()
// 	return nil, fmt.Errorf("Upgrade error (HTTP %d)\n", res.GetStatusCode())
// }

func TestEOFSocket(t *testing.T){

	socket := new(bytes.Buffer)

	_, err := Parse(socket)

	if err == nil {
		t.Fatalf("Empty socket expected EOF, got no error")
	} else if err != io.ErrUnexpectedEOF {
		t.Fatalf("Empty socket expected EOF, got '%s'", err)
	}

}

func TestInvalidRequestLine(t *testing.T){

	socket := new(bytes.Buffer)
	cases := []struct{
		Reqline  string
		HasError bool
	}{
		{ "abc",                        true },
		{ "a  c",                       true },
		{ "a    c",                     true },
		{ "a c",                        true },
		{ "a b c",                      true },

		{ "GET invaliduri HTTP/1.1",    true },
		{ "GET /validuri HTTP/1.1",    false },

		{ "POST /validuri HTTP/1.1",    true },
		{ "PUT /validuri HTTP/1.1",     true },
		{ "DELETE /validuri HTTP/1.1",  true },
		{ "OPTIONS /validuri HTTP/1.1", true },
		{ "UNKNOWN /validuri HTTP/1.1", true },

		{ "GET / HTTP",                 true },
		{ "GET / HTTP/",                true },
		{ "GET / 1.1",                  true },
		{ "GET / 1",                    true },
		{ "GET / HTTP/52",              true },
		{ "GET / HTTP/1.",              true },
		{ "GET / HTTP/.1",              true },
		{ "GET / HTTP/1.1",             false },
		{ "GET / HTTP/2",               false },
	}

	for ti, tc := range cases {

		socket.Reset()
		socket.Write( []byte(tc.Reqline) )
		socket.Write( []byte("\r\n\r\n") )

		_, err := Parse(socket)

		if !tc.HasError {

			// no error -> ok
			if err == nil {
				continue
			// error for the end of the request -> ok
			} else if _, ok := err.(*IncompleteRequest); ok {
				continue
			}

			t.Errorf("[%d] Expected no error", ti)
		}

		// missing required error -> error
		if tc.HasError && err == nil {
			t.Errorf("[%d] Expected error", ti)
			continue
		}

		ir, ok := err.(*InvalidRequest);

		// not InvalidRequest err -> error
		if !ok || ir.Field != "Request-Line" {
			t.Errorf("[%d] expected InvalidRequest", ti)
			continue
		}

	}

}

func TestInvalidHost(t *testing.T){

	requestLine := []byte( "GET / HTTP/1.1\r\n" )

	socket := new(bytes.Buffer)
	cases := []struct{
		Host     string
		HasError bool
	}{
		{ "1",                          true },
		{ "12",                         true },
		{ "123",                        true },
		{ "1234",                       false },

		{ "singlevalue",                false },
		{ "multi value",                true  },

		{ "singlevalue:1",              false },
		{ "singlevalue:",               true },
		{ "singlevalue:x",              true },
		{ "xx:x",                       true },
		{ ":xxx",                       true },
		{ "xxx:",                       true },
		{ "a:12",                       false },

		{ "google.com",                 false },
		{ "8.8.8.8",                    false },
		{ "google.com:8080",            false },
		{ "8.8.8.8:8080",               false },
	}

	for ti, tc := range cases {

		socket.Reset()
		socket.Write(requestLine)
		socket.Write( []byte("Host: ") )
		socket.Write( []byte(tc.Host) )
		socket.Write( []byte("\r\n\r\n") )

		_, err := Parse(socket)

		if !tc.HasError {


			// no error -> ok
			if err == nil {
				continue
			// error for the end of the request -> ok
			} else if _, ok := err.(*IncompleteRequest); ok {
				continue
			}

			t.Errorf("[%d] Expected no error; %s", ti, err)
		}

		// missing required error -> error
		if tc.HasError && err == nil {
			t.Errorf("[%d] Expected error", ti)
			continue
		}

		// check if InvalidRequest
		ir, ok := err.(*InvalidRequest);

		// not InvalidRequest err -> error
		if ok && ir.Field != "Host" {
			t.Errorf("[%d] expected InvalidRequest", ti)
			continue
		}

	}

}