package generators

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

type GrungArrays struct {
	Nm1 []string `json:"nm1"`
	Nm2 []string `json:"nm2"`
	Nm3 []string `json:"nm3"`
	Nm4 []string `json:"nm4"`
	Nm5 []string `json:"nm5"`
	Nm6 []string `json:"nm6"`
	Nm7 []string `json:"nm7"`
	Nm8 []string `json:"nm8"`
}

func LoadGrungArrays(path string) (GrungArrays, error) {
	var arrays GrungArrays
	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 GrungName(arr *GrungArrays, swearFilter func(string) bool) string {
	for {
		nTp := rand.Intn(8)
		rnd := rand.Intn(len(arr.Nm1))
		rnd3 := rand.Intn(len(arr.Nm3))
		rnd4 := rand.Intn(len(arr.Nm4))
		var nMs string
		if nTp < 4 {
			rnd2 := rand.Intn(len(arr.Nm2))
			for arr.Nm1[rnd] == arr.Nm2[rnd2] {
				rnd2 = rand.Intn(len(arr.Nm2))
			}
			nTmp := arr.Nm2[rnd2] + arr.Nm3[rnd3] + arr.Nm4[rnd4]
			nTmp = strings.Title(nTmp)
			nMs = arr.Nm1[rnd] + "'" + nTmp
		} else if nTp < 6 {
			rnd2 := rand.Intn(len(arr.Nm1))
			nTmp := arr.Nm3[rnd3]
			nTmp = strings.Title(nTmp)
			nMs = arr.Nm1[rnd] + "'" + nTmp + arr.Nm4[rnd4] + "'" + arr.Nm1[rnd2] + "'" + nTmp + arr.Nm4[rnd4]
		} else {
			rnd2 := rand.Intn(len(arr.Nm2))
			rnd5 := rand.Intn(len(arr.Nm5))
			rnd6 := rand.Intn(len(arr.Nm6))
			rnd7 := rand.Intn(len(arr.Nm7))
			rnd8 := rand.Intn(len(arr.Nm8))
			rnd9 := rand.Intn(len(arr.Nm4))
			if nTp == 6 {
				for rnd7 < 3 && rnd9 < 3 {
					rnd9 = rand.Intn(len(arr.Nm4))
				}
				nTmp := arr.Nm2[rnd2] + arr.Nm3[rnd3] + arr.Nm4[rnd4] + "-" + arr.Nm5[rnd5] + arr.Nm6[rnd6] + arr.Nm7[rnd7] + arr.Nm8[rnd8] + arr.Nm4[rnd9]
				nTmp = strings.Title(nTmp)
				nMs = arr.Nm1[rnd] + "'" + nTmp
			} else {
				for rnd5 < 3 && rnd9 < 3 {
					rnd9 = rand.Intn(len(arr.Nm4))
				}
				for rnd5 < 3 && rnd4 < 3 {
					rnd4 = rand.Intn(len(arr.Nm4))
				}
				nTmp := arr.Nm2[rnd2] + arr.Nm3[rnd3] + arr.Nm7[rnd7] + arr.Nm8[rnd8] + arr.Nm4[rnd9] + "'" + arr.Nm5[rnd5] + arr.Nm6[rnd6] + arr.Nm4[rnd4]
				nTmp = strings.Title(nTmp)
				nMs = arr.Nm1[rnd] + "'" + nTmp
			}
		}
		if swearFilter == nil || !swearFilter(nMs) {
			return nMs
		}
	}
}

func GenerateGrungNames(arr *GrungArrays, swearFilter func(string) bool) []string {
	names := make([]string, 0, 10)
	for range 10 {
		n := GrungName(arr, swearFilter)
		names = append(names, n)
	}
	return names
}