package tencentim

import (
	"bytes"
	"context"
	"encoding/json"
	"io"
	"net/http"
	"strings"
	"testing"
	"time"
)

// roundTripFunc 允许测试拦截腾讯云 REST 请求而不访问外网。
type roundTripFunc func(*http.Request) (*http.Response, error)

// RoundTrip 实现 http.RoundTripper。
func (f roundTripFunc) RoundTrip(request *http.Request) (*http.Response, error) {
	return f(request)
}

// TestRESTClientEnsureRoomGroupBuildsTencentRequest 锁定建群请求的 REST 命令和核心字段。
func TestRESTClientEnsureRoomGroupBuildsTencentRequest(t *testing.T) {
	var capturedPath string
	var capturedBody map[string]any
	client := newTestRESTClient(t, func(request *http.Request) (*http.Response, error) {
		capturedPath = request.URL.Path
		if err := json.NewDecoder(request.Body).Decode(&capturedBody); err != nil {
			t.Fatalf("decode request body failed: %v", err)
		}

		return okRESTResponse(), nil
	})

	if err := client.EnsureRoomGroup(context.Background(), "room-1001", 10001); err != nil {
		t.Fatalf("EnsureRoomGroup failed: %v", err)
	}

	if capturedPath != "/"+createGroupCommand {
		t.Fatalf("path mismatch: got %q", capturedPath)
	}
	if capturedBody["GroupId"] != "room-1001" || capturedBody["Type"] != DefaultGroupType {
		t.Fatalf("unexpected create group body: %+v", capturedBody)
	}
}

// TestRESTClientPublishRoomEventBuildsCustomMessage 锁定房间系统事件的自定义消息载荷。
func TestRESTClientPublishRoomEventBuildsCustomMessage(t *testing.T) {
	var capturedPath string
	var capturedBody map[string]any
	client := newTestRESTClient(t, func(request *http.Request) (*http.Response, error) {
		capturedPath = request.URL.Path
		if err := json.NewDecoder(request.Body).Decode(&capturedBody); err != nil {
			t.Fatalf("decode request body failed: %v", err)
		}

		return okRESTResponse(), nil
	})

	err := client.PublishRoomEvent(context.Background(), RoomEvent{
		EventID:      "evt-1",
		RoomID:       "room-1001",
		EventType:    "room_gift_sent",
		ActorUserID:  10001,
		TargetUserID: 10002,
		GiftValue:    20,
		RoomVersion:  7,
	})
	if err != nil {
		t.Fatalf("PublishRoomEvent failed: %v", err)
	}

	if capturedPath != "/"+sendGroupMsgCommand {
		t.Fatalf("path mismatch: got %q", capturedPath)
	}
	if capturedBody["GroupId"] != "room-1001" {
		t.Fatalf("group id mismatch: %+v", capturedBody)
	}
	body, ok := capturedBody["MsgBody"].([]any)
	if !ok || len(body) != 1 {
		t.Fatalf("unexpected msg body: %+v", capturedBody["MsgBody"])
	}
	element, ok := body[0].(map[string]any)
	if !ok || element["MsgType"] != "TIMCustomElem" {
		t.Fatalf("unexpected message element: %+v", body[0])
	}
	content, ok := element["MsgContent"].(map[string]any)
	if !ok || content["Ext"] != "room_system_message" || content["Desc"] != "room_gift_sent" {
		t.Fatalf("unexpected custom content: %+v", element["MsgContent"])
	}
	if !strings.Contains(content["Data"].(string), `"event_id":"evt-1"`) {
		t.Fatalf("event payload missing event_id: %s", content["Data"])
	}
}

// TestRESTClientDeleteRoomGroupMemberBuildsTencentRequest 锁定踢出 IM 群成员的 REST 请求。
func TestRESTClientDeleteRoomGroupMemberBuildsTencentRequest(t *testing.T) {
	var capturedPath string
	var capturedBody map[string]any
	client := newTestRESTClient(t, func(request *http.Request) (*http.Response, error) {
		capturedPath = request.URL.Path
		if err := json.NewDecoder(request.Body).Decode(&capturedBody); err != nil {
			t.Fatalf("decode request body failed: %v", err)
		}

		return okRESTResponse(), nil
	})

	if err := client.DeleteRoomGroupMember(context.Background(), "room-1001", 10002); err != nil {
		t.Fatalf("DeleteRoomGroupMember failed: %v", err)
	}

	if capturedPath != "/"+deleteGroupMemberCommand {
		t.Fatalf("path mismatch: got %q", capturedPath)
	}
	members, ok := capturedBody["MemberToDel_Account"].([]any)
	if !ok || len(members) != 1 || members[0] != "10002" {
		t.Fatalf("unexpected member removal body: %+v", capturedBody)
	}
	if capturedBody["GroupId"] != "room-1001" || capturedBody["Silence"].(float64) != 1 {
		t.Fatalf("unexpected group removal body: %+v", capturedBody)
	}
}

func newTestRESTClient(t *testing.T, roundTrip roundTripFunc) *RESTClient {
	t.Helper()

	client, err := NewRESTClient(RESTConfig{
		SDKAppID:        1400000000,
		SecretKey:       "secret",
		AdminIdentifier: "administrator",
		AdminUserSigTTL: time.Hour,
		HTTPClient: &http.Client{
			Transport: roundTrip,
		},
	})
	if err != nil {
		t.Fatalf("NewRESTClient failed: %v", err)
	}

	return client
}

func okRESTResponse() *http.Response {
	payload := []byte(`{"ActionStatus":"OK","ErrorCode":0,"ErrorInfo":""}`)

	return &http.Response{
		StatusCode: http.StatusOK,
		Body:       io.NopCloser(bytes.NewReader(payload)),
		Header:     make(http.Header),
	}
}