package main

import (
	"bufio"
	"flag"
	"fmt"
	"os"
)

func main() {
	filename := flag.String("f", "", "Candump filename")
	flag.Parse()

	var frames <-chan *CanFrame

	switch {
	case len(*filename) > 0:
		fmt.Printf("Open %v\n", *filename)
		frames = readfile(filename)
	default:
		flag.Usage()
	}

	if frames == nil {
		fmt.Println("Get no data")
		os.Exit(0)
	}

	events := FromCanFrames(frames)

	fmt.Printf("Value %v", PARKING)

	for event := range events {

		switch msg := event.(type) {
		default:
			fmt.Println(msg)
		}

		fmt.Println(event.GetValue())

		//if msg, isType := event.(MaximumBatteryVoltage); isType {
		//	fmt.Printf("MaximumBatteryVoltage: %v\n", msg.GetMaxBattVoltage())
		//}
	}
}

func readfile(filename *string) <-chan *CanFrame {
	c := make(chan *CanFrame)

	go func() {
		defer close(c)

		file, err := os.Open(*filename)
		if err != nil {
			fmt.Println(err)
			return
		}
		defer file.Close()

		scanner := bufio.NewScanner(file)
		for scanner.Scan() {
			text := scanner.Text()
			c <- FromString(&text)
		}

		if err := scanner.Err(); err != nil {
			fmt.Println(err)
		}
	}()

	return c
}