package main

import (
	"bufio"
	"fmt"
	"os"
	"strings"
	"time"

	intcode "git.bullercodeworks.com/brian/adventofcode/2019/intcode-processor"
)

var auto bool

func main() {
	progFileName := "input"

	if len(os.Args) > 1 && os.Args[1] == "-auto" {
		auto = true
	}
	prog := intcode.ReadIntCodeFile(progFileName)
	play(prog)
}

func play(prog []int) {
	p := intcode.NewProgram(prog)
	go func() {
		for {
			for !p.NeedsInput() {
				time.Sleep(1)
			}
			if auto {
			} else {
				var gotInput bool
				for !gotInput {
					fmt.Print("Input (vimlike): ")
					reader := bufio.NewReader(os.Stdin)
					inp, err := reader.ReadString('\n')
					if err != nil {
						panic(err)
					}
					inp = strings.TrimSpace(inp)
					switch inp {
					case "h":
						p.Input(3)
						gotInput = true
					case "j":
						p.Input(2)
						gotInput = true
					case "k":
						p.Input(1)
						gotInput = true
					case "l":
						p.Input(4)
						gotInput = true
					}
				}
			}
			for !p.NeedsOutput() {
				time.Sleep(1)
			}
			moveRes := p.Output()
			switch moveRes {
			case 0: // Hit a wall
				fmt.Println("WALL")
			case 1: // Moved
				fmt.Println("OK")
			case 2: // Moved and done
				fmt.Println("DONE")
			}
		}
	}()
	ret := p.Run()
	if ret == intcode.RET_DONE {

	} else if ret == intcode.RET_ERR {
		fmt.Println("ERROR")
		fmt.Println(p.Error())
	}
}