package proxy

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

func TestReverseProxyPathRewrite(t *testing.T) {
	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		if r.URL.Path != "/v1/health" {
			t.Fatalf("path %q", r.URL.Path)
		}
		w.WriteHeader(http.StatusOK)
	}))
	defer srv.Close()
	up, _ := url.Parse(srv.URL)
	rp := NewReverseProxy(up, "/api/main_srv", "/v1", "")
	// Client-style request (no RequestURI / server quirks from httptest.NewRequest).
	req, err := http.NewRequestWithContext(context.Background(), http.MethodGet, srv.URL+"/api/main_srv/health", nil)
	if err != nil {
		t.Fatal(err)
	}
	rec := httptest.NewRecorder()
	rp.ServeHTTP(rec, req)
	if rec.Code != http.StatusOK {
		t.Fatalf("status %d", rec.Code)
	}
}

func TestReverseProxyPathRewriteWithAPIBasePath(t *testing.T) {
	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		if r.URL.Path != "/api/v1/health" {
			t.Fatalf("path %q", r.URL.Path)
		}
		w.WriteHeader(http.StatusOK)
	}))
	defer srv.Close()
	up, err := url.Parse(srv.URL + "/api/")
	if err != nil {
		t.Fatal(err)
	}
	rp := NewReverseProxy(up, "/api/main_srv", "/v1", "")
	req, err := http.NewRequestWithContext(context.Background(), http.MethodGet, srv.URL+"/api/main_srv/health", nil)
	if err != nil {
		t.Fatal(err)
	}
	rec := httptest.NewRecorder()
	rp.ServeHTTP(rec, req)
	if rec.Code != http.StatusOK {
		t.Fatalf("status %d", rec.Code)
	}
}

func TestReverseProxyPathNestedStatsUsers(t *testing.T) {
	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		if r.URL.Path != "/api/v1/stats/users" {
			t.Fatalf("path %q", r.URL.Path)
		}
		w.WriteHeader(http.StatusOK)
	}))
	defer srv.Close()
	up, err := url.Parse(srv.URL + "/api/")
	if err != nil {
		t.Fatal(err)
	}
	rp := NewReverseProxy(up, "/api/gt2", "/v1", "")
	req, err := http.NewRequestWithContext(context.Background(), http.MethodGet, srv.URL+"/api/gt2/stats/users", nil)
	if err != nil {
		t.Fatal(err)
	}
	rec := httptest.NewRecorder()
	rp.ServeHTTP(rec, req)
	if rec.Code != http.StatusOK {
		t.Fatalf("status %d", rec.Code)
	}
}