package generators

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

type GithzeraiArrays struct {
	Nm1 []string `json:"nm1"`
	Nm2 []string `json:"nm2"`
	Nm3 []string `json:"nm3"`
	Nm4 []string `json:"nm4"`
}

func LoadGithzeraiArrays(path string) (GithzeraiArrays, error) {
	var arrays GithzeraiArrays
	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 GithzeraiNameFem(arr *GithzeraiArrays, swearFilter func(string) bool) string {
	for {
		rnd := rand.Intn(len(arr.Nm3))
		rnd2 := rand.Intn(len(arr.Nm4))
		charL := arr.Nm3[rnd][len(arr.Nm3[rnd])-1]
		charF := arr.Nm4[rnd2][0]
		for charL == charF {
			rnd2 = rand.Intn(len(arr.Nm4))
			charF = arr.Nm4[rnd2][0]
		}
		nMs := arr.Nm3[rnd] + arr.Nm4[rnd2]
		if swearFilter == nil || !swearFilter(nMs) {
			return nMs
		}
	}
}

func GithzeraiNameMas(arr *GithzeraiArrays, swearFilter func(string) bool) string {
	for {
		rnd := rand.Intn(len(arr.Nm1))
		rnd2 := rand.Intn(len(arr.Nm2))
		charL := arr.Nm1[rnd][len(arr.Nm1[rnd])-1]
		charF := arr.Nm2[rnd2][0]
		for charL == charF {
			rnd2 = rand.Intn(len(arr.Nm2))
			charF = arr.Nm2[rnd2][0]
		}
		nMs := arr.Nm1[rnd] + arr.Nm2[rnd2]
		if swearFilter == nil || !swearFilter(nMs) {
			return nMs
		}
	}
}

func GenerateGithzeraiNames(arr *GithzeraiArrays, gender string, swearFilter func(string) bool) []string {
	names := make([]string, 0, 10)
	for i := 0; i < 10; i++ {
		var n string
		if gender == "female" {
			n = GithzeraiNameFem(arr, swearFilter)
		} else {
			n = GithzeraiNameMas(arr, swearFilter)
		}
		names = append(names, n)
	}
	return names
}