package generator

import (
	"fmt"
	"math/rand"

	"galaxy/calc"
	"galaxy/game/internal/generator/plotter"
)

type Map struct {
	Width       uint32
	Height      uint32
	HomePlanets []PlanetarySystem
	FreePlanets []Planet
	plotter     plotter.Plotter
}

type Coordinate struct {
	X, Y float64
}

func NewMap(width, height, players uint32) (*Map, error) {
	p, err := plotter.NewPlotter(width, height, defaultFactor)
	if err != nil {
		return nil, fmt.Errorf("NewPlotter: %s", err)
	}
	return &Map{
		Width:       width,
		Height:      height,
		HomePlanets: make([]PlanetarySystem, players),
		plotter:     p,
	}, nil
}

func (m *Map) CreatePlanets(pc PlanetClass, num int, deadZoneRadius float64, size, resources func() float64) error {
	for range num {
		coord, err := m.NewCoordinate(deadZoneRadius)
		if err != nil {
			return err
		}
		planet := NewPlanet(pc, coord, size(), resources())
		m.AddPlanet(planet)
	}
	return nil
}

func (m *Map) AddPlanet(planet Planet) {
	m.FreePlanets = append(m.FreePlanets, planet)
}

func (m Map) NewCoordinate(deadZoneRaduis float64) (Coordinate, error) {
	if x, y, err := m.plotter.RandomFreePoint(deadZoneRaduis); err != nil {
		return Coordinate{}, fmt.Errorf("NewCoordinate: RandomFreePoint: %s", err)
	} else {
		return Coordinate{X: x, Y: y}, nil
	}
}

func (m Map) ShortDistance(from, to Coordinate) float64 {
	return calc.ShortDistance(m.Width, m.Height, from.X, from.Y, to.X, to.Y)
}

// RandI returns a random float64 value between min and max
func RandI(min, max float64) float64 {
	return min + rand.Float64()*(max-min)
}

// RandIFn is a wrapper for the [RandI] func
func RandIFn(min, max float64) func() float64 {
	return func() float64 {
		return RandI(min, max)
	}
}
