package controller

import (
	"encoding/json"
	"errors"
	"fmt"
	"strconv"
	"time"

	"github.com/mhsanaei/3x-ui/v2/database/model"
	"github.com/mhsanaei/3x-ui/v2/web/service"
	"github.com/mhsanaei/3x-ui/v2/web/session"
	"github.com/mhsanaei/3x-ui/v2/web/websocket"

	"github.com/gin-gonic/gin"
	"gorm.io/gorm"
)

// InboundController handles HTTP requests related to Xray inbounds management.
type InboundController struct {
	inboundService service.InboundService
	xrayService    service.XrayService
	settingService service.SettingService
}

// NewInboundController creates a new InboundController and sets up its routes.
func NewInboundController(g *gin.RouterGroup) *InboundController {
	a := &InboundController{}
	a.initRouter(g)
	return a
}

// initRouter initializes the routes for inbound-related operations.
func (a *InboundController) initRouter(g *gin.RouterGroup) {

	g.GET("/list", a.getInbounds)
	g.GET("/get/:id", a.getInbound)
	g.GET("/getClientTraffics/:email", a.getClientTraffics)
	g.GET("/getClientTrafficsById/:id", a.getClientTrafficsById)

	g.POST("/add", a.addInbound)
	g.POST("/del/:id", a.delInbound)
	g.POST("/update/:id", a.updateInbound)
	g.POST("/clientIps/:email", a.getClientIps)
	g.POST("/clearClientIps/:email", a.clearClientIps)
	g.POST("/addClient", a.addInboundClient)
	g.POST("/:id/delClient/:clientId", a.delInboundClient)
	g.POST("/updateClient/:clientId", a.updateInboundClient)
	g.POST("/:id/resetClientTraffic/:email", a.resetClientTraffic)
	g.POST("/resetAllTraffics", a.resetAllTraffics)
	g.POST("/resetAllClientTraffics/:id", a.resetAllClientTraffics)
	g.POST("/delDepletedClients/:id", a.delDepletedClients)
	g.POST("/import", a.importInbound)
	g.POST("/onlines", a.onlines)
	g.POST("/lastOnline", a.lastOnline)
	g.POST("/updateClientTraffic/:email", a.updateClientTraffic)
	g.POST("/:id/delClientByEmail/:email", a.delInboundClientByEmail)
	g.POST("/batchUpdateClients", a.batchUpdateInboundClients)
}

// getInbounds retrieves the list of inbounds for the logged-in user.
func (a *InboundController) getInbounds(c *gin.Context) {
	user := session.GetLoginUser(c)
	inbounds, err := a.inboundService.GetInbounds(user.Id)
	if err != nil {
		jsonMsg(c, I18nWeb(c, "pages.inbounds.toasts.obtain"), err)
		return
	}
	jsonObj(c, inbounds, nil)
}

// getInbound retrieves a specific inbound by its ID.
func (a *InboundController) getInbound(c *gin.Context) {
	id, err := strconv.Atoi(c.Param("id"))
	if err != nil {
		jsonMsg(c, I18nWeb(c, "get"), err)
		return
	}
	user := session.GetLoginUser(c)
	inbound, err := a.inboundService.GetInboundForUser(user.Id, user.Role == "admin", id)
	if err != nil {
		if errors.Is(err, gorm.ErrRecordNotFound) {
			jsonMsg(c, I18nWeb(c, "pages.inbounds.toasts.obtain"), errors.New("inbound not found"))
			return
		}
		jsonMsg(c, I18nWeb(c, "pages.inbounds.toasts.obtain"), err)
		return
	}
	jsonObj(c, inbound, nil)
}

// getClientTraffics retrieves client traffic information by email.
func (a *InboundController) getClientTraffics(c *gin.Context) {
	email := c.Param("email")
	clientTraffics, err := a.inboundService.GetClientTrafficByEmail(email)
	if err != nil {
		jsonMsg(c, I18nWeb(c, "pages.inbounds.toasts.trafficGetError"), err)
		return
	}
	jsonObj(c, clientTraffics, nil)
}

// getClientTrafficsById retrieves client traffic information by inbound ID.
func (a *InboundController) getClientTrafficsById(c *gin.Context) {
	id := c.Param("id")
	clientTraffics, err := a.inboundService.GetClientTrafficByID(id)
	if err != nil {
		jsonMsg(c, I18nWeb(c, "pages.inbounds.toasts.trafficGetError"), err)
		return
	}
	jsonObj(c, clientTraffics, nil)
}

// addInbound creates a new inbound configuration.
func (a *InboundController) addInbound(c *gin.Context) {
	inbound := &model.Inbound{}
	err := c.ShouldBind(inbound)
	if err != nil {
		jsonMsg(c, I18nWeb(c, "pages.inbounds.toasts.inboundCreateSuccess"), err)
		return
	}
	user := session.GetLoginUser(c)
	inbound.UserId = user.Id
	if inbound.Listen == "" || inbound.Listen == "0.0.0.0" || inbound.Listen == "::" || inbound.Listen == "::0" {
		inbound.Tag = fmt.Sprintf("inbound-%v", inbound.Port)
	} else {
		inbound.Tag = fmt.Sprintf("inbound-%v:%v", inbound.Listen, inbound.Port)
	}

	inbound, needRestart, err := a.inboundService.AddInbound(inbound)
	if err != nil {
		jsonMsg(c, I18nWeb(c, "somethingWentWrong"), err)
		return
	}
	jsonMsgObj(c, I18nWeb(c, "pages.inbounds.toasts.inboundCreateSuccess"), inbound, nil)
	if needRestart {
		a.xrayService.SetToNeedRestart()
	}
	// Broadcast inbounds update via WebSocket
	inbounds, _ := a.inboundService.GetInbounds(user.Id)
	websocket.BroadcastInbounds(inbounds)
}

// delInbound deletes an inbound configuration by its ID.
func (a *InboundController) delInbound(c *gin.Context) {
	id, err := strconv.Atoi(c.Param("id"))
	if err != nil {
		jsonMsg(c, I18nWeb(c, "pages.inbounds.toasts.inboundDeleteSuccess"), err)
		return
	}
	user := session.GetLoginUser(c)
	needRestart, err := a.inboundService.DelInboundForUser(user.Id, user.Role == "admin", id)
	if err != nil {
		jsonMsg(c, I18nWeb(c, "somethingWentWrong"), err)
		return
	}
	jsonMsgObj(c, I18nWeb(c, "pages.inbounds.toasts.inboundDeleteSuccess"), id, nil)
	if needRestart {
		a.xrayService.SetToNeedRestart()
	}
	// Broadcast inbounds update via WebSocket
	inbounds, _ := a.inboundService.GetInbounds(user.Id)
	websocket.BroadcastInbounds(inbounds)
}

// updateInbound updates an existing inbound configuration.
func (a *InboundController) updateInbound(c *gin.Context) {
	id, err := strconv.Atoi(c.Param("id"))
	if err != nil {
		jsonMsg(c, I18nWeb(c, "pages.inbounds.toasts.inboundUpdateSuccess"), err)
		return
	}
	inbound := &model.Inbound{
		Id: id,
	}
	err = c.ShouldBind(inbound)
	if err != nil {
		jsonMsg(c, I18nWeb(c, "pages.inbounds.toasts.inboundUpdateSuccess"), err)
		return
	}
	user := session.GetLoginUser(c)
	inbound, needRestart, err := a.inboundService.UpdateInboundForUser(user.Id, user.Role == "admin", inbound)
	if err != nil {
		jsonMsg(c, I18nWeb(c, "somethingWentWrong"), err)
		return
	}
	jsonMsgObj(c, I18nWeb(c, "pages.inbounds.toasts.inboundUpdateSuccess"), inbound, nil)
	if needRestart {
		a.xrayService.SetToNeedRestart()
	}
	// Broadcast inbounds update via WebSocket
	inbounds, _ := a.inboundService.GetInbounds(user.Id)
	websocket.BroadcastInbounds(inbounds)
}

// getClientIps retrieves the IP addresses associated with a client by email.
func (a *InboundController) getClientIps(c *gin.Context) {
	email := c.Param("email")

	ips, err := a.inboundService.GetInboundClientIps(email)
	if err != nil || ips == "" {
		jsonObj(c, "No IP Record", nil)
		return
	}

	// Prefer returning a normalized string list for consistent UI rendering
	type ipWithTimestamp struct {
		IP        string `json:"ip"`
		Timestamp int64  `json:"timestamp"`
	}

	var ipsWithTime []ipWithTimestamp
	if err := json.Unmarshal([]byte(ips), &ipsWithTime); err == nil && len(ipsWithTime) > 0 {
		formatted := make([]string, 0, len(ipsWithTime))
		for _, item := range ipsWithTime {
			if item.IP == "" {
				continue
			}
			if item.Timestamp > 0 {
				ts := time.Unix(item.Timestamp, 0).Local().Format("2006-01-02 15:04:05")
				formatted = append(formatted, fmt.Sprintf("%s (%s)", item.IP, ts))
				continue
			}
			formatted = append(formatted, item.IP)
		}
		jsonObj(c, formatted, nil)
		return
	}

	var oldIps []string
	if err := json.Unmarshal([]byte(ips), &oldIps); err == nil && len(oldIps) > 0 {
		jsonObj(c, oldIps, nil)
		return
	}

	// If parsing fails, return as string
	jsonObj(c, ips, nil)
}

// clearClientIps clears the IP addresses for a client by email.
func (a *InboundController) clearClientIps(c *gin.Context) {
	email := c.Param("email")

	err := a.inboundService.ClearClientIps(email)
	if err != nil {
		jsonMsg(c, I18nWeb(c, "pages.inbounds.toasts.updateSuccess"), err)
		return
	}
	jsonMsg(c, I18nWeb(c, "pages.inbounds.toasts.logCleanSuccess"), nil)
}

// addInboundClient adds a new client to an existing inbound.
func (a *InboundController) addInboundClient(c *gin.Context) {
	data := &model.Inbound{}
	err := c.ShouldBind(data)
	if err != nil {
		jsonMsg(c, I18nWeb(c, "pages.inbounds.toasts.inboundUpdateSuccess"), err)
		return
	}

	user := session.GetLoginUser(c)
	needRestart, err := a.inboundService.AddInboundClientForUser(user.Id, user.Role == "admin", data)
	if err != nil {
		jsonMsg(c, I18nWeb(c, "somethingWentWrong"), err)
		return
	}
	jsonMsg(c, I18nWeb(c, "pages.inbounds.toasts.inboundClientAddSuccess"), nil)
	if needRestart {
		a.xrayService.SetToNeedRestart()
	}
}

// delInboundClient deletes a client from an inbound by inbound ID and client ID.
func (a *InboundController) delInboundClient(c *gin.Context) {
	id, err := strconv.Atoi(c.Param("id"))
	if err != nil {
		jsonMsg(c, I18nWeb(c, "pages.inbounds.toasts.inboundUpdateSuccess"), err)
		return
	}
	clientId := c.Param("clientId")

	user := session.GetLoginUser(c)
	needRestart, err := a.inboundService.DelInboundClientForUser(user.Id, user.Role == "admin", id, clientId)
	if err != nil {
		jsonMsg(c, I18nWeb(c, "somethingWentWrong"), err)
		return
	}
	jsonMsg(c, I18nWeb(c, "pages.inbounds.toasts.inboundClientDeleteSuccess"), nil)
	if needRestart {
		a.xrayService.SetToNeedRestart()
	}
}

// updateInboundClient updates a client's configuration in an inbound.
func (a *InboundController) updateInboundClient(c *gin.Context) {
	clientId := c.Param("clientId")

	inbound := &model.Inbound{}
	err := c.ShouldBind(inbound)
	if err != nil {
		jsonMsg(c, I18nWeb(c, "pages.inbounds.toasts.inboundUpdateSuccess"), err)
		return
	}

	user := session.GetLoginUser(c)
	needRestart, err := a.inboundService.UpdateInboundClientForUser(user.Id, user.Role == "admin", inbound, clientId)
	if err != nil {
		jsonMsg(c, I18nWeb(c, "somethingWentWrong"), err)
		return
	}
	jsonMsg(c, I18nWeb(c, "pages.inbounds.toasts.inboundClientUpdateSuccess"), nil)
	if needRestart {
		a.xrayService.SetToNeedRestart()
	}
}

// resetClientTraffic resets the traffic counter for a specific client in an inbound.
func (a *InboundController) resetClientTraffic(c *gin.Context) {
	id, err := strconv.Atoi(c.Param("id"))
	if err != nil {
		jsonMsg(c, I18nWeb(c, "pages.inbounds.toasts.inboundUpdateSuccess"), err)
		return
	}
	email := c.Param("email")

	user := session.GetLoginUser(c)
	needRestart, err := a.inboundService.ResetClientTrafficForUser(user.Id, user.Role == "admin", id, email)
	if err != nil {
		jsonMsg(c, I18nWeb(c, "somethingWentWrong"), err)
		return
	}
	jsonMsg(c, I18nWeb(c, "pages.inbounds.toasts.resetInboundClientTrafficSuccess"), nil)
	if needRestart {
		a.xrayService.SetToNeedRestart()
	}
}

// resetAllTraffics resets all traffic counters across all inbounds.
func (a *InboundController) resetAllTraffics(c *gin.Context) {
	err := a.inboundService.ResetAllTraffics()
	if err != nil {
		jsonMsg(c, I18nWeb(c, "somethingWentWrong"), err)
		return
	} else {
		a.xrayService.SetToNeedRestart()
	}
	jsonMsg(c, I18nWeb(c, "pages.inbounds.toasts.resetAllTrafficSuccess"), nil)
}

// resetAllClientTraffics resets traffic counters for all clients in a specific inbound.
func (a *InboundController) resetAllClientTraffics(c *gin.Context) {
	id, err := strconv.Atoi(c.Param("id"))
	if err != nil {
		jsonMsg(c, I18nWeb(c, "pages.inbounds.toasts.inboundUpdateSuccess"), err)
		return
	}

	user := session.GetLoginUser(c)
	err = a.inboundService.ResetAllClientTrafficsForUser(user.Id, user.Role == "admin", id)
	if err != nil {
		jsonMsg(c, I18nWeb(c, "somethingWentWrong"), err)
		return
	} else {
		a.xrayService.SetToNeedRestart()
	}
	jsonMsg(c, I18nWeb(c, "pages.inbounds.toasts.resetAllClientTrafficSuccess"), nil)
}

// importInbound imports an inbound configuration from provided data.
func (a *InboundController) importInbound(c *gin.Context) {
	inbound := &model.Inbound{}
	err := json.Unmarshal([]byte(c.PostForm("data")), inbound)
	if err != nil {
		jsonMsg(c, I18nWeb(c, "somethingWentWrong"), err)
		return
	}
	user := session.GetLoginUser(c)
	inbound.Id = 0
	inbound.UserId = user.Id
	if inbound.Listen == "" || inbound.Listen == "0.0.0.0" || inbound.Listen == "::" || inbound.Listen == "::0" {
		inbound.Tag = fmt.Sprintf("inbound-%v", inbound.Port)
	} else {
		inbound.Tag = fmt.Sprintf("inbound-%v:%v", inbound.Listen, inbound.Port)
	}

	for index := range inbound.ClientStats {
		inbound.ClientStats[index].Id = 0
		inbound.ClientStats[index].Enable = true
	}

	needRestart := false
	inbound, needRestart, err = a.inboundService.AddInbound(inbound)
	jsonMsgObj(c, I18nWeb(c, "pages.inbounds.toasts.inboundCreateSuccess"), inbound, err)
	if err == nil && needRestart {
		a.xrayService.SetToNeedRestart()
	}
}

// delDepletedClients deletes clients in an inbound who have exhausted their traffic limits.
func (a *InboundController) delDepletedClients(c *gin.Context) {
	id, err := strconv.Atoi(c.Param("id"))
	if err != nil {
		jsonMsg(c, I18nWeb(c, "pages.inbounds.toasts.inboundUpdateSuccess"), err)
		return
	}
	user := session.GetLoginUser(c)
	err = a.inboundService.DelDepletedClientsForUser(user.Id, user.Role == "admin", id)
	if err != nil {
		jsonMsg(c, I18nWeb(c, "somethingWentWrong"), err)
		return
	}
	jsonMsg(c, I18nWeb(c, "pages.inbounds.toasts.delDepletedClientsSuccess"), nil)
}

// onlines retrieves the list of currently online clients.
func (a *InboundController) onlines(c *gin.Context) {
	jsonObj(c, a.inboundService.GetOnlineClients(), nil)
}

// lastOnline retrieves the last online timestamps for clients.
func (a *InboundController) lastOnline(c *gin.Context) {
	data, err := a.inboundService.GetClientsLastOnline()
	jsonObj(c, data, err)
}

// updateClientTraffic updates the traffic statistics for a client by email.
func (a *InboundController) updateClientTraffic(c *gin.Context) {
	email := c.Param("email")

	// Define the request structure for traffic update
	type TrafficUpdateRequest struct {
		Upload   int64 `json:"upload"`
		Download int64 `json:"download"`
	}

	var request TrafficUpdateRequest
	err := c.ShouldBindJSON(&request)
	if err != nil {
		jsonMsg(c, I18nWeb(c, "pages.inbounds.toasts.inboundUpdateSuccess"), err)
		return
	}

	err = a.inboundService.UpdateClientTrafficByEmail(email, request.Upload, request.Download)
	if err != nil {
		jsonMsg(c, I18nWeb(c, "somethingWentWrong"), err)
		return
	}

	jsonMsg(c, I18nWeb(c, "pages.inbounds.toasts.inboundClientUpdateSuccess"), nil)
}

// delInboundClientByEmail deletes a client from an inbound by email address.
func (a *InboundController) delInboundClientByEmail(c *gin.Context) {
	inboundId, err := strconv.Atoi(c.Param("id"))
	if err != nil {
		jsonMsg(c, "Invalid inbound ID", err)
		return
	}

	email := c.Param("email")
	user := session.GetLoginUser(c)
	needRestart, err := a.inboundService.DelInboundClientByEmailForUser(user.Id, user.Role == "admin", inboundId, email)
	if err != nil {
		jsonMsg(c, "Failed to delete client by email", err)
		return
	}

	jsonMsg(c, "Client deleted successfully", nil)
	if needRestart {
		a.xrayService.SetToNeedRestart()
	}
}

// batchUpdateInboundClients updates multiple clients in an inbound with the same field changes.
func (a *InboundController) batchUpdateInboundClients(c *gin.Context) {
	var request struct {
		InboundID    int      `json:"inboundId"`
		ClientIDs    []string `json:"clientIds"`
		UpdateFields string   `json:"updateFields"`
	}
	if err := c.ShouldBind(&request); err != nil {
		jsonMsg(c, I18nWeb(c, "pages.inbounds.toasts.inboundUpdateSuccess"), err)
		return
	}

	user := session.GetLoginUser(c)
	needRestart, err := a.inboundService.BatchUpdateInboundClientsForUser(
		user.Id, user.Role == "admin", request.InboundID, request.ClientIDs, request.UpdateFields,
	)
	if err != nil {
		jsonMsg(c, I18nWeb(c, "somethingWentWrong"), err)
		return
	}
	jsonMsg(c, I18nWeb(c, "pages.inbounds.toasts.inboundClientUpdateSuccess"), nil)
	if needRestart {
		a.xrayService.SetToNeedRestart()
	}
}

// getUserInfo returns client traffic information for the logged-in user.
func (a *InboundController) getUserInfo(c *gin.Context) {
	user := session.GetLoginUser(c)
	traffic, err := a.inboundService.GetClientTrafficByEmail(user.Username)
	if err != nil {
		jsonMsg(c, I18nWeb(c, "pages.inbounds.toasts.trafficGetError"), err)
		return
	}
	jsonObj(c, traffic, nil)
}

// getUserSubscriptions returns subscription URLs for the logged-in user.
func (a *InboundController) getUserSubscriptions(c *gin.Context) {
	user := session.GetLoginUser(c)
	traffic, err := a.inboundService.GetClientTrafficByEmail(user.Username)
	if err != nil || traffic == nil {
		jsonObj(c, gin.H{"subClashEnable": false}, nil)
		return
	}

	subId := traffic.SubId
	if subId == "" {
		jsonObj(c, gin.H{"subClashEnable": false}, nil)
		return
	}

	settingsAny, err := a.settingService.GetDefaultSettings(c.Request.Host)
	if err != nil {
		jsonObj(c, gin.H{"subClashEnable": false}, nil)
		return
	}

	settings, ok := settingsAny.(map[string]any)
	if !ok {
		jsonObj(c, gin.H{"subClashEnable": false}, nil)
		return
	}

	subEnable := false
	if v, ok := settings["subEnable"]; ok {
		if b, ok2 := v.(bool); ok2 {
			subEnable = b
		}
	}

	subUrl := ""
	if subEnable {
		if uri, ok := settings["subURI"]; ok {
			if s, ok2 := uri.(string); ok2 && s != "" {
				subUrl = s + subId
			}
		}
	}

	subClashEnable := false
	if v, ok := settings["subClashEnable"]; ok {
		if b, ok2 := v.(bool); ok2 {
			subClashEnable = b
		}
	}

	subClashUrl := ""
	if subClashEnable {
		if uri, ok := settings["subClashURI"]; ok {
			if s, ok2 := uri.(string); ok2 && s != "" {
				subClashUrl = s + subId
			}
		}
	}

	jsonObj(c, gin.H{
		"subId":          subId,
		"subEnable":      subEnable,
		"subUrl":         subUrl,
		"subClashEnable": subClashEnable,
		"subClashUrl":    subClashUrl,
	}, nil)
}