package main

import (
	"net/http"
	"net/http/httptest"
	"strings"
	"testing"
)

func TestGetRemoteAddr(t *testing.T) {
	tests := []struct {
		name string
		set  func(r *http.Request)
		want string
	}{
		{"xff", func(r *http.Request) { r.Header.Set("X-Forwarded-For", "1.1.1.1, 2.2.2.2") }, "1.1.1.1"},
		{"realip", func(r *http.Request) { r.Header.Set("X-Real-IP", "3.3.3.3") }, "3.3.3.3"},
		{"remoteaddr", func(r *http.Request) { r.RemoteAddr = "4.4.4.4:5678" }, "4.4.4.4"},
	}
	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			r := httptest.NewRequest("GET", "/telegram", nil)
			r.RemoteAddr = ""
			tt.set(r)
			if got := GetRemoteAddr(r); got != tt.want {
				t.Fatalf("got %q want %q", got, tt.want)
			}
		})
	}
}

func TestExtractRequest(t *testing.T) {
	r := httptest.NewRequest("POST", "http://example.com/telegram?x=1", strings.NewReader("hello"))
	r.Header.Set("X-Real-IP", "9.9.9.9")
	data := ExtractRequest(r)
	if data.Method != "POST" {
		t.Errorf("method = %q", data.Method)
	}
	if data.RemoteAddr != "9.9.9.9" {
		t.Errorf("remoteaddr = %q", data.RemoteAddr)
	}
	if data.Body != "hello" {
		t.Errorf("body = %q", data.Body)
	}
	if data.URL != "/telegram?x=1" {
		t.Errorf("url = %q", data.URL)
	}
}

func TestExtractRequestBodyLimit(t *testing.T) {
	big := strings.Repeat("a", 2000)
	r := httptest.NewRequest("POST", "/telegram", strings.NewReader(big))
	r.ContentLength = int64(len(big))
	data := ExtractRequest(r)
	if data.Body != "too long" {
		t.Errorf("expected 'too long', got len %d", len(data.Body))
	}
}