package api

import (
	"context"
	"encoding/json"
	"fmt"
	"io"

	"resty.dev/v3"
)

func NewKasaInstance(token string) *Kasa {
	return &Kasa{
		token: token,
		resty: resty.New(),
	}
}

type Kasa struct {
	token string
	resty *resty.Client
}

func createReceiptRow(name string, cnt int, price float64, comment string, disc float64, taxgrp string) ReceiptRow {
	return ReceiptRow{
		Name:    name,
		Cnt:     cnt,
		Price:   price,
		Disc:    disc,
		Taxgrp:  taxgrp,
		Comment: comment,
	}
}

func createReceiptPayCash(PayType int, sum float64, comment string) ReceiptPay {
	return ReceiptPay{
		Type:    PayType,
		Sum:     sum,
		Comment: comment,
	}
}

func createReceiptPayCard(PayType int, sum float64, comment string, cardmask string, bankID string) ReceiptPay {
	return ReceiptPay{
		Type:     PayType,
		Sum:      sum,
		Comment:  comment,
		Paysys:   "parking_pos",
		Cardmask: cardmask,
		BankID:   bankID,
	}
}

func getReceiptSum(rows []ReceiptRow, taxgrp string) float64 {
	sum := 0.0
	for _, row := range rows {
		sum += (row.Price - row.Disc) * float64(row.Cnt)
	}
	return sum
}

func createReceipt(PayType int, sum float64, comment string, cardmask string, bankID string, name string, cnt int, price float64, disc float64, taxgrp string) Receipt {
	rows := []ReceiptRow{createReceiptRow(name, cnt, price, comment, disc, taxgrp)}
	sum = getReceiptSum(rows, taxgrp)

	r := Receipt{
		Sum:      sum,
		Round:    0.00,
		Disc:     0,
		DiscType: 0,
		Rows:     rows,
		Pays:     []ReceiptPay{createReceiptPayCard(PayType, sum, comment, cardmask, bankID)},
	}

	fmt.Println("Receipt sum:", r.Sum)
	return r
}

// "fiscal": {
//     "task": 1,
//     "cashier": "Парковка",
//     "receipt": {
//       "sum": 40.00,
//       "round": 0.00,
//       "comment_up": "Квитанція за паркування",
//       "comment_down": "Дякуємо за користування паркінгом!",
//       "disc": 0.00,
//       "disc_type": 0,
//       "rows": [
//         {
//           "code": "PARK-3H",
//           "pop": "Оплата за послуги паркування",
//           "name": "Парковка, 3 години",
//           "cnt": 1,
//           "price": 40.00,
//           "disc": 0.00,
//           "taxgrp": "4",
//           "comment": "Тариф: 3 години"
//         }
//       ],
//       "pays": [
//         {
//           "type": 0,
//           "sum": 40.00,
//           "change": 0.00,
//           "comment": "Оплата готівкою"
//         }
//       ]
//     }
//   }

func createFiscal(source string, cashier string, PayType int, sum float64, comment string, cardmask string, bankID string, name string, cnt int, price float64, disc float64, taxgrp string) FiskalCheck {
	return FiskalCheck{
		Source: source,
		Fiscal: Fiscal{
			Task:    1,
			Cashier: cashier,
			Receipt: createReceipt(PayType, sum, comment, cardmask, bankID, name, cnt, price, disc, taxgrp),
		},
	}
}

func (k *Kasa) NewSell(ctx context.Context, PayType int, sum float64, comment string, cardmask string, bankID string, name string, cnt int, price float64, disc float64, taxgrp string) (*KasaResponse, error) {
	fiscal := createFiscal("kasa", "test", PayType, sum, comment, cardmask, bankID, name, cnt, price, disc, taxgrp)

	// create a POST request to the kasa api https://kasa.vchasno.ua/api/v3/fiscal/execute with resty
	request, err := k.resty.R().SetBody(fiscal).SetHeader("Authorization", k.token).Post("https://kasa.vchasno.ua/api/v3/fiscal/execute")
	if err != nil {
		return nil, fmt.Errorf("failed to create a POST request to the kasa api: %w", err)
	}
	if request.IsError() {
		return nil, fmt.Errorf("failed to create a POST request to the kasa api: %v", request.Error())
	}
	if request.StatusCode() != 200 {
		return nil, fmt.Errorf("failed to create a POST request to the kasa api: %v", request.Error())
	}

	body, err := io.ReadAll(request.Body)
	if err != nil {
		return nil, fmt.Errorf("failed to read response body: %w", err)
	}

	fmt.Println(string(body))
	var response KasaResponse
	if err := json.Unmarshal(body, &response); err != nil {
		return nil, fmt.Errorf("failed to unmarshal response: %w", err)
	}

	return &response, nil
}