package generators

import (
	"encoding/json"
	"math/rand"
	"os"
)

type KenkuArrays struct {
	Nm1 []string `json:"nm1"`
	Nm2 []string `json:"nm2"`
	Nm3 []string `json:"nm3"`
}

func LoadKenkuArrays(path string) (KenkuArrays, error) {
	var arrays KenkuArrays
	file, err := os.Open(path)
	if err != nil {
		return arrays, err
	}
	defer file.Close()
	decoder := json.NewDecoder(file)
	err = decoder.Decode(&arrays)
	return arrays, err
}

func GenerateKenkuNames(arr *KenkuArrays) []string {
	names := make([]string, 0, 10)
	nm1 := make([]string, len(arr.Nm1))
	nm2 := make([]string, len(arr.Nm2))
	nm3 := make([]string, len(arr.Nm3))
	copy(nm1, arr.Nm1)
	copy(nm2, arr.Nm2)
	copy(nm3, arr.Nm3)
	for i := 0; i < 10; i++ {
		var name string
		if i < 4 {
			rnd := rand.Intn(len(nm1))
			name = nm1[rnd]
			nm1 = append(nm1[:rnd], nm1[rnd+1:]...)
		} else if i < 7 {
			rnd := rand.Intn(len(nm2))
			name = nm2[rnd]
			nm2 = append(nm2[:rnd], nm2[rnd+1:]...)
		} else {
			rnd := rand.Intn(len(nm3))
			name = nm3[rnd]
			nm3 = append(nm3[:rnd], nm3[rnd+1:]...)
		}
		names = append(names, name)
	}
	return names
}