package bitcoin

import (
	"fmt"
	"net/http"
)

// example: https://api.coinconvert.net/convert/btc/cad?amount=1
const fiatConvertURL = "https://api.coinconvert.net/convert/btc/cad"

type FiatConversion struct {
	Status string  `json:"status"`
	BTC    int     `json:"BTC"`
	CAD    float64 `json:"CAD"`
}

// BTC to CAD FIAT conversion - accepts an
// amount in satoshi's and returns a CAD amount * 1000
func (c *Client) ConvertBTCToCAD(amount int) (int, error) {

	fiatConversion := &FiatConversion{}

	req, err := http.NewRequest("GET", fiatConvertURL+"?amount=1", nil)
	if err != nil {
		return 0, fmt.Errorf("failed to create new GET request: %v", err)
	}

	res, err := c.httpClient.Do(req)
	if err != nil {
		return 0, fmt.Errorf("http GET request failed: %v", err)
	}

	err = c.processResponse(res, fiatConversion)
	if err != nil {
		return 0, fmt.Errorf("failed to process response: %v", err)
	}

	if fiatConversion.Status != "success" {
		return 0, fmt.Errorf("fiat conversion status was '%s' but expected 'success'", fiatConversion.Status)
	}

	return (amount * int(fiatConversion.CAD*1000)) / 100000000, nil // one BTC = one hundred million satoshi's
}