package main

import (
	"fmt"
	"net/http"
	"net/http/httptest"
	"testing"
	"time"
)

func TestHandleVisit_Success(t *testing.T) {
	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		w.WriteHeader(http.StatusOK)
		w.Write([]byte(`{"country":"Netherlands","regionName":"Noord-Holland","city":"Amsterdam"}`))
	}))
	defer server.Close()

	v := SetupVisitHandler(&VisitHandlerArgs{baseUrl: server.URL})

	visit := v.HandleVisit("home.collinduncan.com")
	if visit == nil {
		t.FailNow()
	}

	if visit.Location != "Amsterdam, Noord-Holland, Netherlands" {
		t.FailNow()
	}
}

func TestHandleVisit_NoRegion(t *testing.T) {
	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		w.WriteHeader(http.StatusOK)
		w.Write([]byte(`{"country":"Netherlands","city":"Amsterdam"}`))
	}))
	defer server.Close()

	v := SetupVisitHandler(&VisitHandlerArgs{baseUrl: server.URL})

	visit := v.HandleVisit("home.collinduncan.com")
	if visit == nil {
		t.Fatalf("Location is nil")
	}

	if visit.Location != "Amsterdam, Netherlands" {
		t.Fatalf("Location is %s", visit.Location)
	}
}

func TestHandleVisit_NoCountry(t *testing.T) {
	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		w.WriteHeader(http.StatusOK)
		w.Write([]byte(`{"regionName":"Noord-Holland","city":"Amsterdam"}`))
	}))
	defer server.Close()

	v := SetupVisitHandler(&VisitHandlerArgs{baseUrl: server.URL})

	visit := v.HandleVisit("home.collinduncan.com")
	if visit == nil {
		t.FailNow()
	}

	if visit.Location != "Amsterdam, Noord-Holland" {
		t.FailNow()
	}
}

func TestHandleVisit_NoCity(t *testing.T) {
	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		w.WriteHeader(http.StatusOK)
		w.Write([]byte(`{"country":"Netherlands","regionName":"Noord-Holland"}`))
	}))
	defer server.Close()

	v := SetupVisitHandler(&VisitHandlerArgs{baseUrl: server.URL})

	visit := v.HandleVisit("home.collinduncan.com")
	if visit == nil {
		t.FailNow()
	}

	if visit.Location != "Noord-Holland, Netherlands" {
		t.FailNow()
	}
}

func TestHandleVisit_Nothing(t *testing.T) {
	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		w.WriteHeader(http.StatusOK)
		w.Write([]byte(`{}`))
	}))
	defer server.Close()

	v := SetupVisitHandler(&VisitHandlerArgs{baseUrl: server.URL})

	visit := v.HandleVisit("home.collinduncan.com")
	if visit == nil {
		t.FailNow()
	}

	if visit.Location != "" {
		t.FailNow()
	}
}

func TestHandleVisit_RateLimit(t *testing.T) {
	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		w.WriteHeader(http.StatusOK)
		w.Write([]byte(`{"country":"Netherlands","regionName":"Noord-Holland","city":"Amsterdam"}`))
	}))
	defer server.Close()

	v := SetupVisitHandler(&VisitHandlerArgs{
		baseUrl:                  server.URL,
		rateLimitAmount:          30,
		rateLimitDurationSeconds: 1,
	})

	// pre-limit
	for i := 0; i < 30; i++ {
		visit := v.HandleVisit(fmt.Sprintf("home.collinduncan%d.com", i))
		if visit == nil {
			t.Fatalf("Failed before rate-limiter %d", i)
		}

		if visit.Location != "Amsterdam, Noord-Holland, Netherlands" {
			t.Fatal("Failed before rate-limiter, location")
		}
	}

	visit := v.HandleVisit("home.collinduncan90.com")
	if visit != nil {
		t.Fatal("Failed to hit rate limiter")
	}

	time.Sleep(time.Second * 2)

	visit = v.HandleVisit("home.collinduncan90.com")
	if visit == nil {
		t.Fatal("Failed after rate-limiter")
	}

	if visit.Location != "Amsterdam, Noord-Holland, Netherlands" {
		t.Fatal("Failed after rate-limiter, location")
	}
}

func TestHandleVisit_Cache(t *testing.T) {
	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		w.WriteHeader(http.StatusOK)
		w.Write([]byte(`{"country":"Netherlands","regionName":"Noord-Holland","city":"Amsterdam"}`))
	}))
	defer server.Close()

	v := SetupVisitHandler(&VisitHandlerArgs{baseUrl: server.URL, rateLimitDurationSeconds: 1})

	visit := v.HandleVisit("home.collinduncan.com")
	if visit == nil {
		t.FailNow()
	}

	if visit.Location != "Amsterdam, Noord-Holland, Netherlands" {
		t.FailNow()
	}

	visit = v.HandleVisit("home.collinduncan.com")
	if visit != nil {
		t.FailNow()
	}

	time.Sleep(time.Second * 2)

	visit = v.HandleVisit("home.collinduncan.com")
	if visit == nil {
		t.FailNow()
	}
}