package httpRequest

import (
	"go-socket/packages/Enums/WsEventType"
	"go-socket/packages/cache"
	"net/http"
	"time"

	"go-socket/packages/types"
	"go-socket/packages/wsServer"

	"github.com/google/uuid"
)

func haveUserPermissionsOnChannel(permissions types.CachedUserPermissions, user *types.HubUser, channel *types.HubChannel) bool {
	checkAgainst, ok := channel.UsersCachedPermissions[user.OriginalId]
	if !ok || (permissions&checkAgainst) == checkAgainst {
		return false
	}
	return true
}

func HandleHubCreate(response http.ResponseWriter, request *http.Request) {
	if !validCheckWithResponseOnFail(&response, request, normal) {
		return
	}

	ctx := request.Context()
	user, err := getUserByToken(ctx, request.Header.Get("token"))
	if err != nil {
		http.Error(response, "invalid token", http.StatusUnauthorized)
		return
	}

	hubName := request.FormValue("hubname")
	if hubName == "" {
		http.Error(response, "hub name is required", http.StatusBadRequest)
		return
	}

	hub := types.NewHub()
	hub.Name = hubName
	hub.Color = types.Rgba{}.GetRandom()
	hub.Id = uuid.New()
	hub.Creator = user.Id
	hub.CreatedAt = time.Now()

	creator := types.NewHubUser()
	creator.OriginalId = user.Id
	creator.CreatedAt = hub.CreatedAt
	hub.Users[creator.OriginalId] = creator

	rootRole := &types.HubRole{
		Id:          uint8(0),
		Permissions: types.PermissionAll(),
		Name:        "root",
		Color:       types.Rgba{}.GetRandom(),
		CreatedAt:   hub.CreatedAt,
	}
	hub.Roles[rootRole.Id] = rootRole
	creator.Roles.Add(rootRole.Id)

	memberRole := &types.HubRole{
		Id:        types.HubBoundRolesMax,
		Name:      "member",
		Color:     types.Rgba{}.GetRandom(),
		CreatedAt: hub.CreatedAt,
	}
	hub.JoinRole = memberRole
	hub.Roles[memberRole.Id] = memberRole
	creator.Roles.Add(memberRole.Id)

	rootGroup := types.NewHubGroup()
	rootGroup.Name = "root"
	rootGroup.Id = uint8(1)
	rootGroup.Color = types.Rgba{}.GetRandom()
	rootGroup.CreatedAt = hub.CreatedAt
	rootGroup.RolesCanView.Add(rootRole.Id)
	rootGroup.RolesCanView.Add(memberRole.Id)
	hub.Groups[rootGroup.Id] = rootGroup

	channel := types.NewHubChannel()
	channel.Name = "main channel"
	channel.Position = uint8(0)
	channel.Id = uuid.New()
	channel.ParentId = rootGroup.Id
	channel.Description = "The fist channel!"
	channel.CreatedAt = hub.CreatedAt
	channel.RolesCanMessage.Add(rootGroup.Id)
	channel.RolesCanMessage.Add(memberRole.Id)
	channel.RolesCanView.Add(rootGroup.Id)
	channel.RolesCanView.Add(memberRole.Id)
	channel.RolesCanReadHistory.Add(rootGroup.Id)
	channel.RolesCanReadHistory.Add(memberRole.Id)
	channel.UsersCachedPermissions[creator.OriginalId] = types.CachedUserPermissionsAll
	hub.Channels[channel.Id] = channel
}

func HandleChannelSendMessage(response http.ResponseWriter, request *http.Request) {
	if !validCheckWithResponseOnFail(&response, request, normal) {
		return
	}
	ctx := request.Context()
	user, hubUser, hub, err := getHubUserIfValidWithResponseOnFail(ctx, response, request.Header.Get("token"), request.FormValue("hubid"))
	if err != nil {
		return
	}

	msgContent := request.FormValue("msgContent")
	attachedFile := request.FormValue("attachedFile")

	if msgContent == "" && attachedFile == "" {
		http.Error(response, "empty msgContent", http.StatusBadRequest)
		return
	}

	channel, err := getHubChannelIfValidWithResponseOnFail(ctx, response, hub, hubUser, request.FormValue("channelid"))
	if err != nil {
		return
	}

	if !haveUserPermissionsOnChannel(types.CachedUserCanMessage, hubUser, channel) {
		http.Error(response, "cannot send messages here", http.StatusUnauthorized)
		return
	}

	for id, userCachedPerms := range channel.UsersCachedPermissions {
		if !userCachedPerms.CanReadHistory() || id == user.Id {
			continue
		}

		message := &types.Message{
			Id:           uuid.New(),
			AttachedFile: "",
			Content:      msgContent,
			Sender:       user.Id,
			Receiver:     channel.Id,
			CreatedAt:    time.Now(),
		}

		targetUser, err := cache.GetUserById(id)
		if err != nil {
			// todo Add to postgres in future
			continue
		}
		wsServer.WsSendMessageCloseIfTimeout(targetUser, types.WsEventMessage{
			Type:  WsEventType.HubMessage,
			Event: message,
		})
	}
}