package seeder

import (
	"bytes"
	"encoding/json"
	"fmt"
	"io"
	"math/rand"
	"net/http"
	es "simrs-vx/internal/domain/main-entities/user"
	cfg "simrs-vx/internal/infra/sync-cfg"
	"time"
)

type Dto struct {
	LoginNip       []string `json:"loginNip"`
	Instalasi_Code string   `json:"instalasi_code"`
	SeedTableName  string   `json:"seedTableName"`
}

func Send(method string, endpoint string, body *bytes.Buffer, username string) ([]byte, error) {
	var url string = cfg.O.NewHost + "v1/" + endpoint
	var reader io.Reader = nil
	if body != nil {
		reader = body
	}
	req, err := http.NewRequest(method, url, reader)
	if err != nil {
		return nil, err
	}
	req.Header.Set("Content-Type", "application/json")
	req.Header.Set("X-Sync-Source", cfg.O.OldSource)
	req.Header.Set("X-Sync-SecretKey", cfg.O.NewSecretKey)
	req.Header.Set("X-Sync-UserName", username)
	resp, err := http.DefaultClient.Do(req)
	if err != nil {
		return nil, err
	}
	defer resp.Body.Close()

	if resp.StatusCode != http.StatusOK {
		return nil, fmt.Errorf("http status code %d", resp.StatusCode)
	}
	respBody, _ := io.ReadAll(resp.Body)
	return respBody, nil
}

func CreateUser(user es.CreateDto) (*es.User, error) {
	var path = "user"

	// create request body
	jsonUser, err := json.Marshal(user)
	if err != nil {
		return nil, err
	}

	reqBody := bytes.NewBuffer(jsonUser)
	// send data to main-api
	resp, err := Send(http.MethodPost, path, reqBody, "von")
	if err != nil {
		return nil, err
	}

	type MetaData struct {
		Source    string `json:"source"`
		Status    string `json:"status"`
		Structure string `json:"structure"`
	}

	type MainApiResp struct {
		Meta MetaData `json:"meta"`
		Data es.User  `json:"data"`
	}

	// getting response
	var data MainApiResp
	err = json.Unmarshal(resp, &data)
	if err != nil {
		return nil, err
	}

	return &data.Data, nil
}

func GenerateDummyNIK(gender string) string {
	rand.Seed(time.Now().UnixNano())

	// 1️⃣ Kode wilayah (6 digit)
	// Bisa di-random, atau gunakan kode tetap seperti Jakarta: 317301
	region := rand.Intn(999999) // 000000 - 999999
	regionCode := fmt.Sprintf("%06d", region)

	// 2️⃣ Tanggal lahir (DDMMYY)
	year := rand.Intn(30) + 70 // antara tahun 1970-1999 (bisa diganti range lain)
	month := rand.Intn(12) + 1
	day := rand.Intn(28) + 1 // selalu valid

	if gender == "F" {
		day += 40 // aturan NIK perempuan: tanggal lahir + 40
	}

	birth := fmt.Sprintf("%02d%02d%02d", day, month, year)

	// 3️⃣ Nomor urut (4 digit)
	sequence := fmt.Sprintf("%04d", rand.Intn(9999))

	// 4️⃣ Susun NIK akhir
	nik := regionCode + birth + sequence

	return nik
}