package starnet

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

func TestConcurrentRequests(t *testing.T) {
	var counter int64
	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		atomic.AddInt64(&counter, 1)
		w.WriteHeader(http.StatusOK)
		w.Write([]byte("OK"))
	}))
	defer server.Close()

	client := NewClientNoErr()
	concurrency := 100
	var wg sync.WaitGroup
	wg.Add(concurrency)

	for i := 0; i < concurrency; i++ {
		go func() {
			defer wg.Done()
			resp, err := client.Get(server.URL)
			if err != nil {
				t.Errorf("Get() error: %v", err)
				return
			}
			resp.Close()
		}()
	}

	wg.Wait()

	if atomic.LoadInt64(&counter) != int64(concurrency) {
		t.Errorf("counter = %v; want %v", counter, concurrency)
	}
}

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

	client := NewClientNoErr()
	var wg sync.WaitGroup
	wg.Add(200)

	// 100 goroutines reading
	for i := 0; i < 100; i++ {
		go func() {
			defer wg.Done()
			resp, err := client.Get(server.URL)
			if err != nil {
				t.Errorf("Get() error: %v", err)
				return
			}
			resp.Close()
		}()
	}

	// 100 goroutines modifying options
	for i := 0; i < 100; i++ {
		go func(i int) {
			defer wg.Done()
			if i%2 == 0 {
				client.AddOptions(WithTimeout(5 * time.Second))
			} else {
				_ = client.RequestOptions()
			}
		}(i)
	}

	wg.Wait()
}

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

	baseReq := NewSimpleRequest(server.URL, "GET").SetHeader("X-Base", "value")

	var wg sync.WaitGroup
	wg.Add(50)

	for i := 0; i < 50; i++ {
		go func(i int) {
			defer wg.Done()
			cloned := baseReq.Clone()
			// 修复：使用有效的 header 值
			cloned.SetHeader("X-Index", fmt.Sprintf("%d", i))
			resp, err := cloned.Do()
			if err != nil {
				t.Errorf("Do() error: %v", err)
				return
			}
			resp.Close()
		}(i)
	}

	wg.Wait()
}