package hamster_tycoon

import (
	"errors"
	"fmt"
	"math/rand"
)

const (
	Full = iota
	AlmostFull
	Middle
	AlmostEmpty
	Empty
)

const (
	TotalGestationPeriod =  15
	MinChild = 5
	MaxCild = 9
	GestationCooldown = (3*7) + 2
	GestationMinAge = 10*6
	MaxAge = 365*2
	GestationLuck = 70
	FEMALE = "F"
	MALE = "M"

)

var GlobalHamsterNumber = 1

type Hamster struct {
	Name string
	Number int
	Sexe string
	Age int
	Father *Hamster
	Mother *Hamster
	HungerLevel int8
	ThirstLevel int8
	Weight float64
	Height float64
	Alive bool
	Selled bool
	Gestation bool
	GestationPeriod int8
	GestationCooldown int8
	Child []*Hamster
}

func(h *Hamster) Die(){
	h.Alive = false
}

func (h *Hamster) Fuck(another *Hamster) (bool,error){
	if h.Sexe == another.Sexe {
		return false, errors.New("can't fuck together")
	}

	if h.Age <= GestationMinAge || another.Age <= GestationMinAge {
		return false, errors.New("one of the hamster is too young")
	}

	rand := randNumber(1,100)

	if rand <= GestationLuck {
		female := func() *Hamster{if h.Sexe == FEMALE {return h } else {return another}}()
		female.Gestation = true
		female.GestationPeriod = 0
		female.GestationCooldown = TotalGestationPeriod + GestationCooldown
	}
	return rand <= GestationLuck, nil
}

func Born(father *Hamster, mother *Hamster)([]*Hamster,error){
	if !mother.Alive || mother.Selled {
		return nil, errors.New("the mother is not here")
	}
	if mother.GestationPeriod != TotalGestationPeriod {
		return nil, errors.New("not the time to make child")
	}

	mother.GestationCooldown = 0
	mother.Gestation = false
	mother.GestationPeriod = 0

	numberOfChild := randNumberChild()
	child := make([]*Hamster,numberOfChild)
	for i := 1; i <= numberOfChild; i++{
		child[i] = &Hamster{
			Name: fmt.Sprintf("Hamster %d",GlobalHamsterNumber),
			Number: GlobalHamsterNumber,
			Age : 1,
			Sexe: randSexe(),
			Father: father,
			Mother: mother,
			HungerLevel: Full,
			ThirstLevel: Full,
			Alive: true,
			Selled: false,
			Gestation: false,
			GestationPeriod: 0,
			GestationCooldown: 30,
		}
	}
	mother.Child = append(mother.Child, child...)
	father.Child = append(father.Child, child...)
	return child,nil
}

func randNumberChild() int {
	return randNumber(MinChild,MaxCild)
}

func randSexe() string {
	return func () string{
		if randNumber(1,2) == 2 {
			return MALE
		} else {
		return FEMALE
		}
	}()
}

func randNumber(min int ,max int) int {
	return min + rand.Intn(max-min)
}