package api

import (
	"fmt"
	"github.com/gin-contrib/gzip"

	"github.com/gin-gonic/gin"
	"github.com/gin-gonic/gin/binding"
	"github.com/go-playground/validator/v10"
	"google.golang.org/grpc"
	"google.golang.org/grpc/credentials/insecure"

	"net/http"
	"strings"

	"github.com/openimsdk/open-im-server/v3/pkg/common/prommetrics"
	"github.com/openimsdk/open-im-server/v3/pkg/common/servererrs"
	"github.com/openimsdk/open-im-server/v3/pkg/rpcclient"
	"github.com/openimsdk/protocol/constant"
	"github.com/openimsdk/tools/apiresp"
	"github.com/openimsdk/tools/discovery"
	"github.com/openimsdk/tools/log"
	"github.com/openimsdk/tools/mw"
)

const (
	NoCompression      = -1
	DefaultCompression = 0
	BestCompression    = 1
	BestSpeed          = 2
)

func prommetricsGin() gin.HandlerFunc {
	return func(c *gin.Context) {
		c.Next()
		path := c.FullPath()
		if c.Writer.Status() == http.StatusNotFound {
			prommetrics.HttpCall("<404>", c.Request.Method, c.Writer.Status())
		} else {
			prommetrics.HttpCall(path, c.Request.Method, c.Writer.Status())
		}
		if resp := apiresp.GetGinApiResponse(c); resp != nil {
			prommetrics.APICall(path, c.Request.Method, resp.ErrCode)
		}
	}
}

func newGinRouter(disCov discovery.SvcDiscoveryRegistry, config *Config) *gin.Engine {
	disCov.AddOption(mw.GrpcClient(), grpc.WithTransportCredentials(insecure.NewCredentials()),
		grpc.WithDefaultServiceConfig(fmt.Sprintf(`{"LoadBalancingPolicy": "%s"}`, "round_robin")))
	gin.SetMode(gin.ReleaseMode)
	r := gin.New()
	if v, ok := binding.Validator.Engine().(*validator.Validate); ok {
		_ = v.RegisterValidation("required_if", RequiredIf)
	}
	// init rpc client here
	userRpc := rpcclient.NewUser(disCov, config.Share.RpcRegisterName.User, config.Share.RpcRegisterName.MessageGateway,
		config.Share.IMAdminUserID)
	groupRpc := rpcclient.NewGroup(disCov, config.Share.RpcRegisterName.Group)
	friendRpc := rpcclient.NewFriend(disCov, config.Share.RpcRegisterName.Friend)
	messageRpc := rpcclient.NewMessage(disCov, config.Share.RpcRegisterName.Msg)
	conversationRpc := rpcclient.NewConversation(disCov, config.Share.RpcRegisterName.Conversation)
	authRpc := rpcclient.NewAuth(disCov, config.Share.RpcRegisterName.Auth)
	thirdRpc := rpcclient.NewThird(disCov, config.Share.RpcRegisterName.Third, config.API.Prometheus.GrafanaURL)
	switch config.API.Api.CompressionLevel {
	case NoCompression:
	case DefaultCompression:
		r.Use(gzip.Gzip(gzip.DefaultCompression))
	case BestCompression:
		r.Use(gzip.Gzip(gzip.BestCompression))
	case BestSpeed:
		r.Use(gzip.Gzip(gzip.BestSpeed))
	}
	r.Use(prommetricsGin(), gin.Recovery(), mw.CorsHandler(), mw.GinParseOperationID(), GinParseToken(authRpc))
	u := NewUserApi(*userRpc)
	m := NewMessageApi(messageRpc, userRpc, config.Share.IMAdminUserID)
	userRouterGroup := r.Group("/user")
	{
		userRouterGroup.POST("/user_register", u.UserRegister)
		userRouterGroup.POST("/update_user_info", u.UpdateUserInfo)
		userRouterGroup.POST("/update_user_info_ex", u.UpdateUserInfoEx)
		userRouterGroup.POST("/set_global_msg_recv_opt", u.SetGlobalRecvMessageOpt)
		userRouterGroup.POST("/get_users_info", u.GetUsersPublicInfo)
		userRouterGroup.POST("/get_all_users_uid", u.GetAllUsersID)
		userRouterGroup.POST("/account_check", u.AccountCheck)
		userRouterGroup.POST("/get_users", u.GetUsers)
		userRouterGroup.POST("/get_users_online_status", u.GetUsersOnlineStatus)
		userRouterGroup.POST("/get_users_online_token_detail", u.GetUsersOnlineTokenDetail)
		userRouterGroup.POST("/subscribe_users_status", u.SubscriberStatus)
		userRouterGroup.POST("/get_users_status", u.GetUserStatus)
		userRouterGroup.POST("/get_subscribe_users_status", u.GetSubscribeUsersStatus)

		userRouterGroup.POST("/process_user_command_add", u.ProcessUserCommandAdd)
		userRouterGroup.POST("/process_user_command_delete", u.ProcessUserCommandDelete)
		userRouterGroup.POST("/process_user_command_update", u.ProcessUserCommandUpdate)
		userRouterGroup.POST("/process_user_command_get", u.ProcessUserCommandGet)
		userRouterGroup.POST("/process_user_command_get_all", u.ProcessUserCommandGetAll)

		userRouterGroup.POST("/add_notification_account", u.AddNotificationAccount)
		userRouterGroup.POST("/update_notification_account", u.UpdateNotificationAccountInfo)
		userRouterGroup.POST("/search_notification_account", u.SearchNotificationAccount)
	}
	// friend routing group
	friendRouterGroup := r.Group("/friend")
	{
		f := NewFriendApi(*friendRpc)
		friendRouterGroup.POST("/delete_friend", f.DeleteFriend)
		friendRouterGroup.POST("/get_friend_apply_list", f.GetFriendApplyList)
		friendRouterGroup.POST("/get_designated_friend_apply", f.GetDesignatedFriendsApply)
		friendRouterGroup.POST("/get_self_friend_apply_list", f.GetSelfApplyList)
		friendRouterGroup.POST("/get_friend_list", f.GetFriendList)
		friendRouterGroup.POST("/get_designated_friends", f.GetDesignatedFriends)
		friendRouterGroup.POST("/add_friend", f.ApplyToAddFriend)
		friendRouterGroup.POST("/add_friend_response", f.RespondFriendApply)
		friendRouterGroup.POST("/set_friend_remark", f.SetFriendRemark)
		friendRouterGroup.POST("/add_black", f.AddBlack)
		friendRouterGroup.POST("/get_black_list", f.GetPaginationBlacks)
		friendRouterGroup.POST("/remove_black", f.RemoveBlack)
		friendRouterGroup.POST("/get_incremental_blacks", f.GetIncrementalBlacks)
		friendRouterGroup.POST("/import_friend", f.ImportFriends)
		friendRouterGroup.POST("/is_friend", f.IsFriend)
		friendRouterGroup.POST("/get_friend_id", f.GetFriendIDs)
		friendRouterGroup.POST("/get_specified_friends_info", f.GetSpecifiedFriendsInfo)
		friendRouterGroup.POST("/update_friends", f.UpdateFriends)
		friendRouterGroup.POST("/get_incremental_friends", f.GetIncrementalFriends)
		friendRouterGroup.POST("/get_full_friend_user_ids", f.GetFullFriendUserIDs)
	}
	g := NewGroupApi(*groupRpc)
	groupRouterGroup := r.Group("/group")
	{
		groupRouterGroup.POST("/create_group", g.CreateGroup)
		groupRouterGroup.POST("/set_group_info", g.SetGroupInfo)
		groupRouterGroup.POST("/set_group_info_ex", g.SetGroupInfoEX)
		groupRouterGroup.POST("/join_group", g.JoinGroup)
		groupRouterGroup.POST("/quit_group", g.QuitGroup)
		groupRouterGroup.POST("/group_application_response", g.ApplicationGroupResponse)
		groupRouterGroup.POST("/transfer_group", g.TransferGroupOwner)
		groupRouterGroup.POST("/get_recv_group_applicationList", g.GetRecvGroupApplicationList)
		groupRouterGroup.POST("/get_user_req_group_applicationList", g.GetUserReqGroupApplicationList)
		groupRouterGroup.POST("/get_group_users_req_application_list", g.GetGroupUsersReqApplicationList)
		groupRouterGroup.POST("/get_groups_info", g.GetGroupsInfo)
		groupRouterGroup.POST("/kick_group", g.KickGroupMember)
		groupRouterGroup.POST("/get_group_members_info", g.GetGroupMembersInfo)
		groupRouterGroup.POST("/get_group_member_list", g.GetGroupMemberList)
		groupRouterGroup.POST("/invite_user_to_group", g.InviteUserToGroup)
		groupRouterGroup.POST("/get_joined_group_list", g.GetJoinedGroupList)
		groupRouterGroup.POST("/dismiss_group", g.DismissGroup) //
		groupRouterGroup.POST("/mute_group_member", g.MuteGroupMember)
		groupRouterGroup.POST("/cancel_mute_group_member", g.CancelMuteGroupMember)
		groupRouterGroup.POST("/mute_group", g.MuteGroup)
		groupRouterGroup.POST("/cancel_mute_group", g.CancelMuteGroup)
		groupRouterGroup.POST("/set_group_member_info", g.SetGroupMemberInfo)
		groupRouterGroup.POST("/get_group_abstract_info", g.GetGroupAbstractInfo)
		groupRouterGroup.POST("/get_groups", g.GetGroups)
		groupRouterGroup.POST("/get_group_member_user_id", g.GetGroupMemberUserIDs)
		groupRouterGroup.POST("/get_incremental_join_groups", g.GetIncrementalJoinGroup)
		groupRouterGroup.POST("/get_incremental_group_members", g.GetIncrementalGroupMember)
		groupRouterGroup.POST("/get_incremental_group_members_batch", g.GetIncrementalGroupMemberBatch)
		groupRouterGroup.POST("/get_full_group_member_user_ids", g.GetFullGroupMemberUserIDs)
		groupRouterGroup.POST("/get_full_join_group_ids", g.GetFullJoinGroupIDs)
	}
	// certificate
	authRouterGroup := r.Group("/auth")
	{
		a := NewAuthApi(*authRpc)
		authRouterGroup.POST("/user_token", a.UserToken)
		authRouterGroup.POST("/get_user_token", a.GetUserToken)
		authRouterGroup.POST("/parse_token", a.ParseToken)
		authRouterGroup.POST("/force_logout", a.ForceLogout)
	}
	// Third service
	thirdGroup := r.Group("/third")
	{
		t := NewThirdApi(*thirdRpc)
		thirdGroup.GET("/prometheus", t.GetPrometheus)
		thirdGroup.POST("/fcm_update_token", t.FcmUpdateToken)
		thirdGroup.POST("/set_app_badge", t.SetAppBadge)

		logs := thirdGroup.Group("/logs")
		logs.POST("/upload", t.UploadLogs)
		logs.POST("/delete", t.DeleteLogs)
		logs.POST("/search", t.SearchLogs)

		objectGroup := r.Group("/object")

		objectGroup.POST("/part_limit", t.PartLimit)
		objectGroup.POST("/part_size", t.PartSize)
		objectGroup.POST("/initiate_multipart_upload", t.InitiateMultipartUpload)
		objectGroup.POST("/auth_sign", t.AuthSign)
		objectGroup.POST("/complete_multipart_upload", t.CompleteMultipartUpload)
		objectGroup.POST("/access_url", t.AccessURL)
		objectGroup.POST("/initiate_form_data", t.InitiateFormData)
		objectGroup.POST("/complete_form_data", t.CompleteFormData)
		objectGroup.GET("/*name", t.ObjectRedirect)
	}
	// Message
	msgGroup := r.Group("/msg")
	{
		msgGroup.POST("/newest_seq", m.GetSeq)
		msgGroup.POST("/search_msg", m.SearchMsg)
		msgGroup.POST("/send_msg", m.SendMessage)
		msgGroup.POST("/send_business_notification", m.SendBusinessNotification)
		msgGroup.POST("/pull_msg_by_seq", m.PullMsgBySeqs)
		msgGroup.POST("/revoke_msg", m.RevokeMsg)
		msgGroup.POST("/mark_msgs_as_read", m.MarkMsgsAsRead)
		msgGroup.POST("/mark_conversation_as_read", m.MarkConversationAsRead)
		msgGroup.POST("/get_conversations_has_read_and_max_seq", m.GetConversationsHasReadAndMaxSeq)
		msgGroup.POST("/set_conversation_has_read_seq", m.SetConversationHasReadSeq)

		msgGroup.POST("/clear_conversation_msg", m.ClearConversationsMsg)
		msgGroup.POST("/user_clear_all_msg", m.UserClearAllMsg)
		msgGroup.POST("/delete_msgs", m.DeleteMsgs)
		msgGroup.POST("/delete_msg_phsical_by_seq", m.DeleteMsgPhysicalBySeq)
		msgGroup.POST("/delete_msg_physical", m.DeleteMsgPhysical)

		msgGroup.POST("/batch_send_msg", m.BatchSendMsg)
		msgGroup.POST("/check_msg_is_send_success", m.CheckMsgIsSendSuccess)
		msgGroup.POST("/get_server_time", m.GetServerTime)
	}
	// Conversation
	conversationGroup := r.Group("/conversation")
	{
		c := NewConversationApi(*conversationRpc)
		conversationGroup.POST("/get_sorted_conversation_list", c.GetSortedConversationList)
		conversationGroup.POST("/get_all_conversations", c.GetAllConversations)
		conversationGroup.POST("/get_conversation", c.GetConversation)
		conversationGroup.POST("/get_conversations", c.GetConversations)
		conversationGroup.POST("/set_conversations", c.SetConversations)
		conversationGroup.POST("/get_conversation_offline_push_user_ids", c.GetConversationOfflinePushUserIDs)
		conversationGroup.POST("/get_full_conversation_ids", c.GetFullOwnerConversationIDs)
		conversationGroup.POST("/get_incremental_conversations", c.GetIncrementalConversation)
		conversationGroup.POST("/get_owner_conversation", c.GetOwnerConversation)
	}

	statisticsGroup := r.Group("/statistics")
	{
		statisticsGroup.POST("/user/register", u.UserRegisterCount)
		statisticsGroup.POST("/user/active", m.GetActiveUser)
		statisticsGroup.POST("/group/create", g.GroupCreateCount)
		statisticsGroup.POST("/group/active", m.GetActiveGroup)
	}
	return r
}

func GinParseToken(authRPC *rpcclient.Auth) gin.HandlerFunc {
	return func(c *gin.Context) {
		switch c.Request.Method {
		case http.MethodPost:
			for _, wApi := range Whitelist {
				if strings.HasPrefix(c.Request.URL.Path, wApi) {
					c.Next()
					return
				}
			}

			token := c.Request.Header.Get(constant.Token)
			if token == "" {
				log.ZWarn(c, "header get token error", servererrs.ErrArgs.WrapMsg("header must have token"))
				apiresp.GinError(c, servererrs.ErrArgs.WrapMsg("header must have token"))
				c.Abort()
				return
			}
			resp, err := authRPC.ParseToken(c, token)
			if err != nil {
				apiresp.GinError(c, err)
				c.Abort()
				return
			}
			c.Set(constant.OpUserPlatform, constant.PlatformIDToName(int(resp.PlatformID)))
			c.Set(constant.OpUserID, resp.UserID)
			c.Next()
		}
	}
}

// Whitelist api not parse token
var Whitelist = []string{
	"/user/user_register",
	"/auth/user_token",
	"/auth/parse_token",
}