package agi

import (
	"encoding/json"
	"log"

	"github.com/robertkrimen/otto"
	user "imuslab.com/arozos/mod/user"
)

/*
	AGI IoT Control Protocols

	This is a library for allowing AGI script to control / send commands to IoT devices
	Use with caution and prepare to handle errors. IoT devices are not always online / connectabe.

	Author: tobychui
*/

func (g *Gateway) IoTLibRegister() {
	err := g.RegisterLib("iot", g.injectIoTFunctions)
	if err != nil {
		log.Fatal(err)
	}
}

func (g *Gateway) injectIoTFunctions(vm *otto.Otto, u *user.User) {
	vm.Set("_iot_scan", func(call otto.FunctionCall) otto.Value {
		scannedDevices := g.Option.IotManager.ScanDevices()
		js, _ := json.Marshal(scannedDevices)
		devList, err := vm.ToValue(string(js))
		if err != nil {
			return otto.FalseValue()
		}
		return devList
	})

	vm.Set("_iot_list", func(call otto.FunctionCall) otto.Value {
		devices := g.Option.IotManager.GetCachedDeviceList()
		js, _ := json.Marshal(devices)
		devList, err := vm.ToValue(string(js))
		if err != nil {
			return otto.FalseValue()
		}
		return devList
	})

	vm.Set("_iot_connect", func(call otto.FunctionCall) otto.Value {
		return otto.NullValue()
	})

	vm.Set("_iot_status", func(call otto.FunctionCall) otto.Value {
		return otto.NullValue()
	})

	vm.Set("_iot_exec", func(call otto.FunctionCall) otto.Value {
		return otto.NullValue()
	})

	vm.Set("_iot_disconnect", func(call otto.FunctionCall) otto.Value {
		return otto.NullValue()
	})

	vm.Set("_iot_iconTag", func(call otto.FunctionCall) otto.Value {
		return otto.NullValue()
	})

	vm.Set("_iot_ready", func(call otto.FunctionCall) otto.Value {
		if g.Option.IotManager == nil {
			return otto.FalseValue()
		} else {
			return otto.TrueValue()
		}
	})

	//Wrap all the native code function into an imagelib class
	_, err := vm.Run(`
		var iot = {
			"scan": function(){
				var devList = _iot_scan();
				return JSON.parse(devList);
			},
			"list": function(){
				var devList = _iot_list();
				return JSON.parse(devList);
			}
		};

		iot.ready = _iot_ready;
		iot.connect = _iot_connect;
		iot.status = _iot_status;
		iot.exec = _iot_exec;
		iot.disconnect = _iot_disconnect;
		iot.iconTag = _iot_iconTag;
		
	`)

	if err != nil {
		log.Println("*AGI* IoT Functions Injection Error", err.Error())
	}
}