package jsonip

import (
	"context"
	"net"
	"net/http"
	"net/http/httptest"
	"testing"

	"github.com/stretchr/testify/assert"
)

func TestService_Name(t *testing.T) {
	s := Service{}

	assert.Equal(t, "jsonip", s.Name())
}

func TestService_Lookup(t *testing.T) {
	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		_, err := w.Write([]byte(`{"ip":"211.46.32.214","geo-ip":"https://getjsonip.com/#plus","API Help":"https://getjsonip.com/#docs"}`))
		assert.NoError(t, err)
	}))
	defer server.Close()

	s := Service{url: server.URL}

	ip, err := s.Lookup(context.Background())
	assert.NoError(t, err)

	assert.Equal(t, net.IPv4(211, 46, 32, 214), ip)
}

func TestService_Lookup_HTTPError(t *testing.T) {
	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		w.WriteHeader(404)
	}))
	defer server.Close()

	s := Service{url: server.URL}

	ip, err := s.Lookup(context.Background())
	assert.EqualError(t, err, "HTTP Response: 404 Not Found")
	assert.Nil(t, ip)
}

func TestService_Lookup_JsonParseError(t *testing.T) {
	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		_, err := w.Write([]byte(`invalid_json`))
		assert.NoError(t, err)
	}))
	defer server.Close()

	s := Service{url: server.URL}

	ip, err := s.Lookup(context.Background())
	assert.EqualError(t, err, "invalid character 'i' looking for beginning of value")
	assert.Nil(t, ip)
}

func TestService_Lookup_IPParseError(t *testing.T) {
	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		_, err := w.Write([]byte(`{"ip":"xxx","geo-ip":"https://getjsonip.com/#plus","API Help":"https://getjsonip.com/#docs"}`))
		assert.NoError(t, err)
	}))
	defer server.Close()

	s := Service{url: server.URL}

	ip, err := s.Lookup(context.Background())
	assert.EqualError(t, err, "invalid IP address: xxx")
	assert.Nil(t, ip)
}