package main

import (
	"os"
	"path/filepath"
	"time"

	"github.com/davecgh/go-spew/spew"
	"github.com/stianeikeland/go-rpio/v4"

	"git.tcp.direct/kayos/door5/pkg/assets"
	"git.tcp.direct/kayos/door5/pkg/config"
	"git.tcp.direct/kayos/door5/pkg/logger"
)

var conf *config.Config

func OpenDoor() {
	pin := rpio.Pin(conf.Pins[config.Door])
	pin.Output()
	pin.High()
}

func CloseDoor() {
	pin := rpio.Pin(conf.Pins[config.Door])
	pin.Output()
	pin.Low()
}

func watchButton() {
	logger.Get().Logger.Trace().Uint8("pin", uint8(conf.Pins[config.Button])).Msg("exit button daemon started")
	defer logger.Get().Logger.Trace().Msg("exit button daemon stopped")
	pin := rpio.Pin(conf.Pins[config.Button])
	pin.Input()
	pin.PullUp()
	count := 0
	for {
		if pin.Read() != rpio.Low {
			time.Sleep(5 * time.Millisecond)
			if count > 0 {
				count--
			}
			continue
		}
		count++
		if count >= 100 {
			logger.Get().Logger.Info().Int("count", count).Msg("door unlocked")
			OpenDoor()
			time.Sleep(5 * time.Second)
			CloseDoor()
			count = 0
		}
		time.Sleep(5 * time.Millisecond)
	}
}

var DoorOpen bool

func watchReed() {
	logger.Get().Logger.Trace().Uint8("pin", uint8(conf.Pins[config.Reed])).Msg("reed switch daemon started")
	defer logger.Get().Logger.Trace().Msg("reed switch daemon stopped")
	pin := rpio.Pin(conf.Pins[config.Reed])
	pin.Input()
	pin.PullUp()
	for {
		switch {
		case pin.Read() == rpio.Low && !DoorOpen:
			logger.Get().Logger.Info().Msg("door opened")
			DoorOpen = true
			go assets.PlayChime()
		case pin.Read() == rpio.High && DoorOpen:
			logger.Get().Logger.Info().Msg("door closed")
			DoorOpen = false
		}
		time.Sleep(100 * time.Millisecond)
	}
}

func loadConfig() {
	var err error
	path, _ := os.UserConfigDir()
	path = filepath.Join(path, "door5", "config.toml")
	if conf, err = config.ReadConfig(path); err != nil {
		logger.Get().Logger.Warn().Err(err).Msg("error reading config")
		logger.Get().Logger.Warn().Msg("writing default config")
		c := &config.Config{
			Pins: config.Pins{
				config.Door:   22,
				config.Button: 5,
				config.Reed:   26,
			},
		}
		if err = c.WriteConfig(path); err != nil {
			println(err.Error())
		}
		conf = c
	}
}

func main() {
	logger.Get().Logger.Info().Msg("starting door5")
	logger.Get().Logger.Trace().Msg("loading config")
	loadConfig()
	logger.Get().Logger.Debug().Msg(spew.Sdump(conf))
	logger.Get().Logger.Info().Msg("initializing gpio")
	if err := rpio.Open(); err != nil {
		logger.Get().Logger.Fatal().Msg(err.Error())
	}

	go watchButton()
	go watchReed()

	select {}
}