package socketserver

import (
	"encoding/json"
	"fmt"
	"janex/admin-dashboard-backend/grouptasks"
	"janex/admin-dashboard-backend/modules/cache"
	"janex/admin-dashboard-backend/modules/database"
	"janex/admin-dashboard-backend/modules/structs"
	"janex/admin-dashboard-backend/modules/utils"
	"janex/admin-dashboard-backend/socketclients"
	"time"

	"github.com/gofiber/websocket/v2"
	"github.com/google/uuid"
	"github.com/rs/zerolog/log"
)

var register = make(chan *structs.SocketClient)
var broadcast = make(chan structs.SocketMessage)
var unregister = make(chan *websocket.Conn)

func RunHub() {
	for {
		select {
		case newSocketClient := <-register:
			userId := fmt.Sprintf("%v", newSocketClient.Conn.Locals("userId"))
			sessionId := fmt.Sprintf("%v", newSocketClient.Conn.Locals("sessionId"))

			// close connection instantly if sessionId is empty
			if sessionId == "<nil>" {
				newSocketClient.SendUnauthorizedCloseMessage()
				continue
			}

			newSocketClient.SessionId = sessionId
			newSocketClient.UserId = userId

			cache.AddSocketClient(sessionId, newSocketClient)

			log.Debug().Msgf("clients: %d", len(cache.GetSocketClients()))
			log.Debug().Msgf("REGISTER CLIENT: %s", sessionId)

			var user structs.User

			database.DB.First(&user, "id = ?", userId)

			newSocketClient.SendMessage(structs.SendSocketMessage{
				Cmd: utils.SentCmdInitUserSocketConnection,
				Body: structs.InitUserSocketConnection{
					User: structs.UserData{
						Username: user.Username,
						Email:    user.Email,
						Sessions: socketclients.GetUserSessions(userId),
					},
					CategoryGroups:  cache.GetCategoryGroupsSorted(),
					GroupTasks:      grouptasks.GetAllGroupTasks(),
					GroupTasksSteps: grouptasks.GetAllGroupTasksSteps(),
				},
			})

			socketclients.UpdateConnectedUsers()
			socketclients.UpdateUserSessionsForUser(userId, sessionId)

		case data := <-broadcast:
			var receivedMessage structs.ReceivedMessage

			if err := json.Unmarshal(data.Msg, &receivedMessage); err != nil {
				log.Error().Msgf("Failed to unmarshal received msg, err: %s", err)
				continue
			}

			log.Info().Msgf("Received message: %s", receivedMessage, receivedMessage.Cmd)

			switch receivedMessage.Cmd {
			case utils.ReceivedCmdStartGroupTasks:
				log.Debug().Msgf("received start group tasks %s", receivedMessage.Body)

				category := receivedMessage.Body["category"].(string)
				groupId := receivedMessage.Body["id"].(string)

				globalInputsJsonString := utils.MarshalJson(receivedMessage.Body["globalInputs"])

				groupTaskId := uuid.New().String()

				groupTasks := &structs.GroupTasks{
					Id:               groupTaskId,
					Category:         category,
					GroupId:          groupId,
					GroupName:        receivedMessage.Body["groupName"].(string),
					CurrentTasksStep: 1,
					NumberOfSteps:    uint8(receivedMessage.Body["numberOfSteps"].(float64)),
					Status:           structs.GroupTasksStatusRunning,
					GlobalInputs:     globalInputsJsonString,
					StartedAt:        time.Now(),
					RememberId:       receivedMessage.Body["rememberId"].(string),
				}

				database.DB.Create(groupTasks)

				socketclients.BroadcastMessage(structs.SendSocketMessage{
					Cmd:  utils.SentCmdNewGroupTaskStarted,
					Body: groupTasks,
				})

				go grouptasks.RunGroupTask(grouptasks.RunGroupTaskArgs{
					StartType:    grouptasks.RunGroupTaskStartTypeNormal,
					GroupTaskId:  groupTaskId,
					Category:     category,
					GroupId:      groupId,
					Step:         1,
					TaskStepId:   "",
					GlobalInputs: globalInputsJsonString,
				})
				break
			case utils.ReceivedCmdTaskFailedTryAgainRunTaskStep:
				go grouptasks.RunGroupTask(grouptasks.RunGroupTaskArgs{
					StartType:   grouptasks.RunGroupTaskStartTypeTryAgain,
					GroupTaskId: receivedMessage.Body["groupTaskId"].(string),
					Category:    receivedMessage.Body["category"].(string),
					GroupId:     receivedMessage.Body["groupId"].(string),
					Step:        uint8(receivedMessage.Body["step"].(float64)),
					TaskStepId:  receivedMessage.Body["taskStepId"].(string),
				})
				break
			case utils.ReceivedCmdTaskContinueTaskStep:
				go grouptasks.RunGroupTask(grouptasks.RunGroupTaskArgs{
					StartType:   grouptasks.RunGroupTaskStartTypeTryAgain,
					GroupTaskId: receivedMessage.Body["groupTaskId"].(string),
					Category:    receivedMessage.Body["category"].(string),
					GroupId:     receivedMessage.Body["groupId"].(string),
					Step:        uint8(receivedMessage.Body["step"].(float64)),
					TaskStepId:  receivedMessage.Body["taskStepId"].(string),
					TaskInputs:  utils.MarshalJson(receivedMessage.Body["taskInputs"]),
				})

				break
			case utils.ReceivedCmdReloadGroupTasks:
				category := receivedMessage.Body["category"].(string)

				socketclients.BroadcastMessage(structs.SendSocketMessage{
					Cmd:  utils.SentCmdReloadingGroupTasks,
					Body: category,
				})

				grouptasks.LoadGroups(category)

				break

			default:
				log.Error().Msgf("Received unknown message: %s", receivedMessage)
				break
			}

		case connection := <-unregister:
			cache.DeleteClientByConn(connection)

			socketclients.UpdateUserSessionsForUser(connection.Locals("userId").(string), connection.Locals("sessionId").(string))

			socketclients.UpdateConnectedUsers()
		}
	}
}