package starnet

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

func TestNewClient(t *testing.T) {
	client, err := NewClient()
	if err != nil {
		t.Fatalf("NewClient() error: %v", err)
	}
	if client == nil {
		t.Fatal("NewClient() returned nil")
	}
}

func TestNewClientNoErr(t *testing.T) {
	client := NewClientNoErr()
	if client == nil {
		t.Fatal("NewClientNoErr() returned nil")
	}
}

func TestNewClientFromHTTP(t *testing.T) {
	httpClient := &http.Client{
		Timeout: 10 * time.Second,
	}

	client, err := NewClientFromHTTP(httpClient)
	if err != nil {
		t.Fatalf("NewClientFromHTTP() error: %v", err)
	}
	if client == nil {
		t.Fatal("NewClientFromHTTP() returned nil")
	}

	// Test with nil client
	_, err = NewClientFromHTTP(nil)
	if err == nil {
		t.Error("NewClientFromHTTP(nil) should return error")
	}
}

func TestClientOptions(t *testing.T) {
	client := NewClientNoErr()

	// Set options
	client.SetOptions(WithTimeout(5 * time.Second))
	opts := client.RequestOptions()
	if len(opts) != 1 {
		t.Errorf("RequestOptions() length = %v; want 1", len(opts))
	}

	// Add options
	client.AddOptions(WithUserAgent("TestAgent"))
	opts = client.RequestOptions()
	if len(opts) != 2 {
		t.Errorf("RequestOptions() length = %v; want 2", len(opts))
	}
}

func TestClientClone(t *testing.T) {
	client := NewClientNoErr(WithTimeout(5 * time.Second))
	cloned := client.Clone()

	if cloned == nil {
		t.Fatal("Clone() returned nil")
	}

	// 修改克隆的 client
	cloned.SetOptions(WithTimeout(10 * time.Second))

	origOpts := client.RequestOptions()
	clonedOpts := cloned.RequestOptions()

	// 原 client 应该还是 1 个选项
	if len(origOpts) != 1 {
		t.Errorf("Original client options = %v; want 1", len(origOpts))
	}

	// 克隆的 client 应该是 1 个选项（被 SetOptions 覆盖）
	if len(clonedOpts) != 1 {
		t.Errorf("Cloned client options = %v; want 1", len(clonedOpts))
	}
}

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

	client := NewClientNoErr()

	tests := []struct {
		name   string
		method func(string, ...RequestOpt) (*Response, error)
		want   string
	}{
		{"GET", client.Get, "GET"},
		{"POST", client.Post, "POST"},
		{"PUT", client.Put, "PUT"},
		{"DELETE", client.Delete, "DELETE"},
		{"PATCH", client.Patch, "PATCH"},
		{"HEAD", client.Head, "HEAD"},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			resp, err := tt.method(server.URL)
			if err != nil {
				t.Fatalf("%s() error: %v", tt.name, err)
			}
			defer resp.Close()

			if tt.want != "HEAD" {
				body, _ := resp.Body().String()
				if body != tt.want {
					t.Errorf("Body = %v; want %v", body, tt.want)
				}
			}
		})
	}
}

func TestClientRedirect(t *testing.T) {
	redirectCount := 0
	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		if redirectCount < 2 {
			redirectCount++
			http.Redirect(w, r, "/redirected", http.StatusFound)
			return
		}
		w.WriteHeader(http.StatusOK)
		w.Write([]byte("final"))
	}))
	defer server.Close()

	// Test with redirect enabled (default)
	client := NewClientNoErr()
	resp, err := client.Get(server.URL)
	if err != nil {
		t.Fatalf("Get() error: %v", err)
	}
	resp.Close()

	if redirectCount != 2 {
		t.Errorf("Redirect count = %v; want 2", redirectCount)
	}

	// Test with redirect disabled
	redirectCount = 0
	client.DisableRedirect()
	resp2, err := client.Get(server.URL)
	if err != nil {
		t.Fatalf("Get() error: %v", err)
	}
	defer resp2.Close()

	if resp2.StatusCode != http.StatusFound {
		t.Errorf("StatusCode = %v; want %v", resp2.StatusCode, http.StatusFound)
	}
}

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

	// Without skip verify (should fail with self-signed cert)
	client := NewClientNoErr()
	_, err := client.Get(server.URL)
	if err == nil {
		t.Error("Expected TLS error with self-signed cert, got nil")
	}

	// With skip verify
	client.SetDefaultSkipTLSVerify(true)
	resp, err := client.Get(server.URL)
	if err != nil {
		t.Fatalf("Get() with skip verify error: %v", err)
	}
	defer resp.Close()

	if resp.StatusCode != http.StatusOK {
		t.Errorf("StatusCode = %v; want %v", resp.StatusCode, http.StatusOK)
	}
}

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

	client := NewClientNoErr()

	req := client.NewSimpleRequest(server.URL, "GET", WithHeader("X-Test", "v"))
	if req == nil {
		t.Fatal("NewSimpleRequest returned nil")
	}
	if req.Err() != nil {
		t.Fatalf("NewSimpleRequest err: %v", req.Err())
	}

	resp, err := req.Do()
	if err != nil {
		t.Fatalf("Do() error: %v", err)
	}
	defer resp.Close()

	body, _ := resp.Body().String()
	if body != "OK" {
		t.Errorf("Body = %v; want OK", body)
	}
}