package storage

import (
	"bytes"
	"context"
	"encoding/json"
	"github.com/uptrace/bun"
	"os/exec"
	"relynolli-server/external/bitrix"
	"relynolli-server/internal"
	"relynolli-server/models/cart"
	"relynolli-server/models/discount"
	"relynolli-server/models/order"
)

type StorageOrder interface {
	GetTotal(ctx context.Context, fuserId int64, coupon *string) (*TotalQuery, error)
	UpdatePayment(ctx context.Context, payment *order.DBPayment) error
	GetPayments(ctx context.Context) (*[]order.DBPayment, error)
}

func NewStorageOrder() StorageOrder {
	if instance == nil {
		instance = &storage{
			db:  internal.InitDatabase().GetInstance(),
			rdb: internal.InitRedis(),
		}
	}
	return instance
}

type DiscountQuery struct {
	Name  string
	Value int64
}

type QueryItem struct {
	Cart     *cart.DBCart   `json:"cart"`
	Discount *DiscountQuery `json:"discount"`
}

type TotalQuery struct {
	Total     float64      `bun:"total" json:"total"`
	BasePrice float64      `bun:"-" json:"basePrice"`
	Items     *[]QueryItem `bun:"-" json:"items"`
}

func (s *storage) fetchDiscounts(ctx context.Context) (*[]discount.DBDiscount, error) {
	model := new([]discount.DBDiscount)
	err := s.db.NewSelect().Model(model).Scan(ctx)
	if err != nil {
		return nil, err
	}
	return model, nil
}

type DiscountType struct {
	CLASSID string `json:"CLASS_ID"`
	DATA    struct {
		All string `json:"All"`
	} `json:"DATA"`
	CHILDREN []struct {
		CLASSID string `json:"CLASS_ID"`
		DATA    struct {
			Type  string `json:"Type"`
			Value int    `json:"Value"`
			Unit  string `json:"Unit"`
			Max   int    `json:"Max"`
			All   string `json:"All"`
			True  string `json:"True"`
		} `json:"DATA"`
		CHILDREN []interface{} `json:"CHILDREN"`
	} `json:"CHILDREN"`
}

func (s *storage) getDiscountForCoupon(ctx context.Context, coupon string) (*DiscountType, error) {
	var couponDiscountPhpQuery string
	stmt := "select disc.ACTIONS from b_sale_discount_coupon coupon join b_sale_discount disc on coupon.DISCOUNT_ID = disc.ID where coupon.COUPON = ? and coupon.ACTIVE = 'Y'"
	err := s.db.NewRaw(stmt, coupon).Scan(ctx, &couponDiscountPhpQuery)
	if err != nil {
		return nil, err
	}
	var out bytes.Buffer
	var result DiscountType

	cmd := exec.Command("php", "test.php", couponDiscountPhpQuery)
	cmd.Stdout = &out
	err = cmd.Run()

	if err != nil {
		return nil, err
	}

	err = json.Unmarshal(out.Bytes(), &result)
	if err != nil {
		return nil, err
	}

	return &result, nil
}

func (s *storage) GetTotal(ctx context.Context, fuserId int64, coupon *string) (*TotalQuery, error) {
	model := new(TotalQuery)

	api := bitrix.Initialize()
	data, err := api.GetTotalForProduct(int(fuserId), coupon)

	if err != nil {
		return nil, err
	}
	model.Total = data.Price
	model.BasePrice = data.BasePrice
	return model, nil
}

func (s *storage) GetPayments(ctx context.Context) (*[]order.DBPayment, error) {
	var model []order.DBPayment

	err := s.db.NewSelect().Model(&model).Where("status not in (?)", bun.In([]string{"succeeded", "canceled"})).Order("order_id DESC").Scan(ctx)
	if err != nil {
		return nil, err
	}

	for idx, item := range model {
		bitrixPayment := new(order.DBOrderPayment)
		s.db.NewSelect().Model(bitrixPayment).Where("ORDER_ID = ?", item.OrderId).Scan(ctx)
		model[idx].BitrixPayment = bitrixPayment
	}

	return &model, nil
}

func (s *storage) UpdatePayment(ctx context.Context, payment *order.DBPayment) error {
	_, err := s.db.NewUpdate().Model(payment).WherePK().Exec(ctx)
	return err
}