package service

import (
	"encoding/json"
	"errors"
	"sync"
	"x-ui/logger"
	"x-ui/xray"

	"go.uber.org/atomic"
)

var p *xray.Process
var lock sync.Mutex
var isNeedXrayRestart atomic.Bool
var result string

type XrayService struct {
	inboundService InboundService
	settingService SettingService
}

func (s *XrayService) IsXrayRunning() bool {
	return p != nil && p.IsRunning()
}

func (s *XrayService) GetXrayErr() error {
	if p == nil {
		return nil
	}
	return p.GetErr()
}

func (s *XrayService) GetXrayResult() string {
	if result != "" {
		return result
	}
	if s.IsXrayRunning() {
		return ""
	}
	if p == nil {
		return ""
	}
	result = p.GetResult()
	return result
}

func (s *XrayService) GetXrayVersion() string {
	if p == nil {
		return "Unknown"
	}
	return p.GetVersion()
}

func RemoveIndex(s []interface{}, index int) []interface{} {
	return append(s[:index], s[index+1:]...)
}

func (s *XrayService) GetXrayConfig() (*xray.Config, error) {
	templateConfig, err := s.settingService.GetXrayConfigTemplate()
	if err != nil {
		return nil, err
	}

	xrayConfig := &xray.Config{}
	err = json.Unmarshal([]byte(templateConfig), xrayConfig)
	if err != nil {
		return nil, err
	}

	s.inboundService.DisableInvalidClients()

	inbounds, err := s.inboundService.GetAllInbounds()
	if err != nil {
		return nil, err
	}
	for _, inbound := range inbounds {
		if !inbound.Enable {
			continue
		}
		// get settings clients
		settings := map[string]interface{}{}
		json.Unmarshal([]byte(inbound.Settings), &settings)
		clients, ok := settings["clients"].([]interface{})
		if ok {
			// check users active or not
			clientStats := inbound.ClientStats
			for _, clientTraffic := range clientStats {

				indexDecrease := 0
				for index, client := range clients {
					c := client.(map[string]interface{})
					if c["email"] == clientTraffic.Email {
						if !clientTraffic.Enable {
							clients = RemoveIndex(clients, index-indexDecrease)
							indexDecrease++
							logger.Info("Remove Inbound User", c["email"], "due the expire or traffic limit")

						}

					}
				}

			}

			// clear client config for additional parameters
			var final_clients []interface{}
			for _, client := range clients {

				c := client.(map[string]interface{})

				if c["enable"] != nil {
					if enable, ok := c["enable"].(bool); ok && !enable {
						continue
					}
				}
				for key := range c {
					if key != "email" && key != "id" && key != "password" && key != "flow" && key != "alterId" {
						delete(c, key)
					}
				}
				final_clients = append(final_clients, interface{}(c))
			}

			settings["clients"] = final_clients
			modifiedSettings, err := json.Marshal(settings)
			if err != nil {
				return nil, err
			}

			inbound.Settings = string(modifiedSettings)
		}
		inboundConfig := inbound.GenXrayInboundConfig()
		xrayConfig.InboundConfigs = append(xrayConfig.InboundConfigs, *inboundConfig)
	}
	return xrayConfig, nil
}

func (s *XrayService) GetXrayTraffic() ([]*xray.Traffic, []*xray.ClientTraffic, error) {
	if !s.IsXrayRunning() {
		return nil, nil, errors.New("xray is not running")
	}
	return p.GetTraffic(true)
}

func (s *XrayService) RestartXray(isForce bool) error {
	lock.Lock()
	defer lock.Unlock()
	logger.Debug("restart xray, force:", isForce)

	xrayConfig, err := s.GetXrayConfig()
	if err != nil {
		return err
	}

	if p != nil && p.IsRunning() {
		if !isForce && p.GetConfig().Equals(xrayConfig) {
			logger.Debug("not need to restart xray")
			return nil
		}
		p.Stop()
	}

	p = xray.NewProcess(xrayConfig)
	result = ""
	return p.Start()
}

func (s *XrayService) StopXray() error {
	lock.Lock()
	defer lock.Unlock()
	logger.Debug("stop xray")
	if s.IsXrayRunning() {
		return p.Stop()
	}
	return errors.New("xray is not running")
}

func (s *XrayService) SetToNeedRestart() {
	isNeedXrayRestart.Store(true)
}

func (s *XrayService) IsNeedRestartAndSetFalse() bool {
	return isNeedXrayRestart.CompareAndSwap(true, false)
}
