package aoc

import (
	"fmt"
	"math"
	"strings"
)

type Coordinate struct {
	X, Y int
}

func CoordinateFromString(str string) *Coordinate {
	c := Coordinate{}
	r := strings.NewReader(str)
	_, err := fmt.Fscanf(r, "[%d, %d]", c.X, c.Y)
	if err != nil {
		panic(err)
	}
	return &c
}

func (c Coordinate) Angle(t Coordinate) float64 {
	ret := math.Atan2(float64(t.X-c.X), float64(c.Y-t.Y)) * 180 / math.Pi
	if ret < 0 {
		ret = ret + 360
	}
	return ret
}

func (c Coordinate) String() string {
	return fmt.Sprintf("[%d, %d]", c.X, c.Y)
}

func (c Coordinate) Distance(t Coordinate) int {
	return AbsInt(c.X-t.X) + AbsInt(c.Y-t.Y)
}