package httpapiv1

import (
	lucifer3 "git.aiterp.net/lucifer3/server"
	"git.aiterp.net/lucifer3/server/commands"
	"git.aiterp.net/lucifer3/server/effects"
	"git.aiterp.net/lucifer3/server/events"
	"git.aiterp.net/lucifer3/server/services/uistate"
	"github.com/labstack/echo/v4"
	"github.com/labstack/echo/v4/middleware"
	"log"
	"net"
	"sync"
)

func New(addr string) (lucifer3.Service, error) {
	svc := &service{}

	e := echo.New()
	e.HideBanner = true
	e.HidePort = true
	e.Use(middleware.CORS())

	e.GET("/state", func(c echo.Context) error {
		svc.mu.Lock()
		data := svc.data
		svc.mu.Unlock()

		return c.JSON(200, data)
	})

	e.POST("/command", func(c echo.Context) error {
		var input commandInput
		err := c.Bind(&input)
		if err != nil {
			return err
		}

		svc.mu.Lock()
		bus := svc.bus
		svc.mu.Unlock()
		if bus == nil {
			return c.String(413, "Waiting for bus")
		}

		switch {
		case input.Assign != nil:
			bus.RunCommand(commands.Assign{
				ID:     nil,
				Match:  input.Assign.Match,
				Effect: input.Assign.Effect.Effect,
			})
		case input.PairDevice != nil:
			bus.RunCommand(*input.PairDevice)
		case input.ForgetDevice != nil:
			bus.RunCommand(*input.ForgetDevice)
		case input.SearchDevices != nil:
			bus.RunCommand(*input.SearchDevices)
		case input.AddAlias != nil:
			bus.RunCommand(*input.AddAlias)
		case input.RemoveAlias != nil:
			bus.RunCommand(*input.RemoveAlias)
		default:
			return c.String(400, "No supported command found in input")
		}

		return c.JSON(200, input)
	})

	listener, err := net.Listen("tcp", addr)
	if err != nil {
		return nil, err
	}
	e.Listener = listener

	go func() {
		err := e.Start(addr)
		if err != nil {
			log.Fatalln("Failed to listen to webserver")
		}
	}()

	return svc, nil
}

type service struct {
	mu   sync.Mutex
	data uistate.Data
	bus  *lucifer3.EventBus
}

func (s *service) Active() bool {
	return true
}

func (s *service) HandleEvent(bus *lucifer3.EventBus, event lucifer3.Event) {
	switch event := event.(type) {
	case events.Started:
		s.mu.Lock()
		s.bus = bus
		s.mu.Unlock()
	case uistate.Patch:
		s.mu.Lock()
		s.data = s.data.WithPatch(event)
		s.mu.Unlock()

		// TODO: Broadcast websockets
	}
}

type commandInput struct {
	Assign        *assignInput            `json:"assign,omitempty"`
	AddAlias      *commands.AddAlias      `json:"addAlias,omitempty"`
	RemoveAlias   *commands.RemoveAlias   `json:"removeAlias,omitempty"`
	PairDevice    *commands.PairDevice    `json:"pairDevice,omitempty"`
	SearchDevices *commands.SearchDevices `json:"searchDevices,omitempty"`
	ForgetDevice  *commands.ForgetDevice  `json:"forgetDevice,omitempty"`
}

type assignInput struct {
	Match  string               `json:"match"`
	Effect effects.Serializable `json:"effect"`
}