package api

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

func (c *Client) executeRequest(ctx context.Context, request FiscalRequest, response interface{}) error {
	request.Device = c.device

	reqJson, err := json.Marshal(request)
	if err != nil {
		return fmt.Errorf("failed to marshal request: %w", err)
	}

	resp, err := c.resty.R().
		SetContext(ctx).
		SetHeader("Authorization", c.token).
		SetHeader("Content-Type", "application/json").
		SetBody(reqJson).
		Post(c.apiBaseURL + c.fiscalEndpoint)

	if err != nil {
		return fmt.Errorf("request failed: %w", err)
	}

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

	if resp.StatusCode() != 200 {
		return fmt.Errorf("api error (status %d): %s", resp.StatusCode(), string(body))
	}

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

	return nil
}

func (c *Client) OpenShift(ctx context.Context, cashier string) (*SellResponse, error) {
	request := FiscalRequest{
		Fiscal: Fiscal{
			Task:    TaskOpenShift,
			Cashier: cashier,
		},
	}

	var response SellResponse
	if err := c.executeRequest(ctx, request, &response); err != nil {
		return nil, err
	}

	return &response, nil
}

func (c *Client) CloseShift(ctx context.Context, cashier string) (*ZReportResponse, error) {
	request := FiscalRequest{
		Fiscal: Fiscal{
			Task:    TaskZReport,
			Cashier: cashier,
		},
	}

	var response ZReportResponse
	if err := c.executeRequest(ctx, request, &response); err != nil {
		return nil, err
	}

	return &response, nil
}

type SellParams struct {
	Cashier   string
	Source    string
	Rows      []ReceiptRow
	Pays      []ReceiptPay
	Userinfo  *Userinfo
	CommentUP string
}

func (c *Client) Sell(ctx context.Context, params SellParams) (*SellResponse, error) {
	receipt := NewReceipt(params.Rows, params.Pays, params.CommentUP)

	request := FiscalRequest{
		Source: params.Source,
		Fiscal: Fiscal{
			Task:    TaskSell,
			Cashier: params.Cashier,
			Receipt: &receipt,
		},
	}

	if params.Userinfo != nil {
		request.Userinfo = *params.Userinfo
	}

	var response SellResponse
	if err := c.executeRequest(ctx, request, &response); err != nil {
		return nil, err
	}

	return &response, nil
}