package nanoleaf

import (
	"context"
	"fmt"
	lucifer3 "git.aiterp.net/lucifer3/server"
	"git.aiterp.net/lucifer3/server/commands"
	"git.aiterp.net/lucifer3/server/events"
	"strings"
	"time"
)

func NewService() lucifer3.ActiveService {
	return &service{
		bridges: make(map[string]*bridge),
		cancels: make(map[string]context.CancelFunc),
	}
}

type service struct {
	bridges map[string]*bridge
	cancels map[string]context.CancelFunc
}

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

func (s *service) HandleEvent(*lucifer3.EventBus, lucifer3.Event) {}

func (s *service) HandleCommand(bus *lucifer3.EventBus, command lucifer3.Command) {
	switch command := command.(type) {
	case commands.SetState:
		if sub, ok := command.Matches("nanoleaf"); ok && s.bridges[sub] != nil {
			s.bridges[sub].Update(command.ID, command.State)
		}

	case commands.SetStateBatch:
		for _, b := range s.bridges {
			b.UpdateBatch(command)
		}

	case commands.SearchDevices:
		if sub, ok := command.Matches("nanoleaf"); ok {
			if s.bridges[sub] != nil {
				go func(bridge *bridge) {
					changed, err := bridge.Refresh(context.Background())
					if err != nil {
						bus.RunEvent(events.DeviceFailed{
							ID:    command.ID,
							Error: fmt.Sprintf("Search failed: %s", err),
						})
						return
					}
					if changed {
						for _, event := range bridge.HardwareEvents() {
							bus.RunEvent(event)
						}
					}
				}(s.bridges[sub])
			}
		}

	case commands.PairDevice:
		if address, ok := command.Matches("nanoleaf"); ok {
			go func() {
				timeout, cancel := context.WithTimeout(context.Background(), time.Second*5)
				defer cancel()

				apiKey, info, err := Discover(timeout, address, true)
				if err != nil {
					bus.RunEvent(events.DeviceFailed{
						ID:    command.ID,
						Error: fmt.Sprintf("Pairing failed: %s", err),
					})
					return
				}

				bus.RunEvent(events.DeviceAccepted{
					ID:     command.ID,
					APIKey: apiKey,
					Extras: nil,
				})
				bus.RunEvent(events.HardwareMetadata{
					ID:           command.ID,
					Icon:         "bridge",
					SerialNumber: info.SerialNumber,
					FirmwareVersion: strings.Join([]string{
						info.FirmwareVersion, info.BootloaderVersion, info.HardwareVersion,
					}, "; "),
				})
			}()
		}

	case commands.ConnectDevice:
		if sub, ok := command.Matches("nanoleaf"); ok {
			if s.bridges[sub] != nil {
				s.cancels[sub]()
			}

			ctx, cancel := context.WithCancel(context.Background())

			s.bridges[sub] = &bridge{
				host:       sub,
				apiKey:     command.APIKey,
				panels:     make([]*panel, 0, 64),
				panelIDMap: make(map[uint16]string),
			}
			s.cancels[sub] = cancel

			go func() {
				for ctx.Err() == nil {
					ctx2, cancel2 := context.WithCancel(ctx)

					err := s.bridges[sub].Run(ctx2, bus)
					cancel2()
					if err != nil {
						bus.RunEvent(events.DeviceFailed{
							ID:    command.ID,
							Error: fmt.Sprintf("Run failed: %s", err),
						})
					}

					select {
					case <-time.After(time.Second * 5):
					case <-ctx.Done():
						return
					}
				}
			}()
		}
	}
}