package bidtheatre

import (
	"fmt"
	"strconv"
	"strings"

	"github.com/prebid/openrtb/v20/openrtb2"
	"github.com/prebid/prebid-server/v4/adapters"
	"github.com/prebid/prebid-server/v4/config"
	"github.com/prebid/prebid-server/v4/errortypes"
	"github.com/prebid/prebid-server/v4/openrtb_ext"
	"github.com/prebid/prebid-server/v4/util/jsonutil"
)

type adapter struct {
	endpoint string
}

// Builder builds a new instance of the Bidtheatre adapter for the given bidder with the given config.
func Builder(bidderName openrtb_ext.BidderName, config config.Adapter, server config.Server) (adapters.Bidder, error) {
	bidder := &adapter{
		endpoint: config.Endpoint,
	}

	return bidder, nil
}

func (a *adapter) MakeRequests(request *openrtb2.BidRequest, requestInfo *adapters.ExtraRequestInfo) ([]*adapters.RequestData, []error) {
	requestJSON, err := jsonutil.Marshal(request)
	if err != nil {
		return nil, []error{err}
	}

	requestData := &adapters.RequestData{
		Method: "POST",
		Uri:    a.endpoint,
		Body:   requestJSON,
		ImpIDs: openrtb_ext.GetImpIDs(request.Imp),
	}

	return []*adapters.RequestData{requestData}, nil
}

func getMediaTypeForBid(bid openrtb2.Bid) (openrtb_ext.BidType, error) {
	var bidExt openrtb_ext.ExtBid
	if err := jsonutil.Unmarshal(bid.Ext, &bidExt); err == nil && bidExt.Prebid != nil {
		return openrtb_ext.ParseBidType(string(bidExt.Prebid.Type))
	}

	return "", &errortypes.BadServerResponse{
		Message: fmt.Sprintf("Failed to parse impression \"%s\" mediatype", bid.ImpID),
	}
}

func (a *adapter) MakeBids(request *openrtb2.BidRequest, requestData *adapters.RequestData, responseData *adapters.ResponseData) (*adapters.BidderResponse, []error) {
	if adapters.IsResponseStatusCodeNoContent(responseData) {
		return nil, nil
	}

	if err := adapters.CheckResponseStatusCodeForErrors(responseData); err != nil {
		return nil, []error{err}
	}

	var response openrtb2.BidResponse
	if err := jsonutil.Unmarshal(responseData.Body, &response); err != nil {
		return nil, []error{err}
	}

	bidResponse := adapters.NewBidderResponseWithBidsCapacity(len(request.Imp))
	bidResponse.Currency = response.Cur
	var errors []error
	for _, seatBid := range response.SeatBid {
		for i := range seatBid.Bid {
			resolveMacros(&seatBid.Bid[i])
			bidType, err := getMediaTypeForBid(seatBid.Bid[i])
			if err != nil {
				errors = append(errors, err)
				continue
			}
			bidResponse.Bids = append(bidResponse.Bids, &adapters.TypedBid{
				Bid:     &seatBid.Bid[i],
				BidType: bidType,
			})
		}
	}
	return bidResponse, errors
}

func resolveMacros(bid *openrtb2.Bid) {
	if bid == nil {
		return
	}
	price := strconv.FormatFloat(bid.Price, 'f', -1, 64)
	bid.NURL = strings.Replace(bid.NURL, "${AUCTION_PRICE}", price, -1)
	bid.AdM = strings.Replace(bid.AdM, "${AUCTION_PRICE}", price, -1)
}