package pancakeswapnft

import (
	"context"
	"fmt"
	"github.com/dustin/go-humanize"
	"sort"
	"strconv"
	"time"

	"github.com/machinebox/graphql"
	"github.com/pkg/errors"
	"github.com/rs/zerolog/log"
)

type Transaction struct {
	Id              string     `json:"id"`
	Block           string     `json:"block"`
	Timestamp       int64      `json:"timestamp,string"`
	Collection      Collection `json:"collection"`
	Nft             Nft        `json:"nft"`
	AskPrice        float64    `json:"askPrice,string"`
	NetPrice        float64    `json:"netPrice,string"`
	Buyer           User       `json:"buyer"`
	BuyerUsername   string
	Seller          User `json:"seller"`
	SellerUsername  string
	WithBNB         bool `json:"withBNB"`
	Time            time.Time
	Squad           Squad
	Score           float64
	Url             string
	TimeDescription string
	IsMine          bool
}

type TransactionService struct {
	graphClient    *graphql.Client
	squadservice   *SquadService
	floorService   *FloorService
	profileService *ProfileService

	bscaddress string
}

func NewTransactionService(graphClient *graphql.Client, squadservice *SquadService, floorService *FloorService, profileService *ProfileService, bscaddress string) *TransactionService {
	return &TransactionService{
		graphClient:    graphClient,
		squadservice:   squadservice,
		floorService:   floorService,
		profileService: profileService,
		bscaddress:     bscaddress,
	}
}

type WhereOptions struct {
	Collection   string `json:"collection,omitempty"`
	TimestampLte string `json:"timestamp_lte,omitempty"`
}

func (s *TransactionService) GetLightPageByLimit(ctx context.Context, pagenumber int, limit int, opts WhereOptions) ([]Transaction, error) {
	req := graphql.NewRequest(`
		query getNftsMarketData($first: Int, $skip: Int!, $where: Transaction_filter, $orderBy: Transaction_orderBy, $orderDirection: OrderDirection) {
			transactions(where: $where, first: $first, orderBy: $orderBy, orderDirection: $orderDirection, skip: $skip) {
				timestamp
				askPrice
				netPrice
				nft {
					tokenId
					transactionHistory {
						timestamp
						askPrice
					}
				}
				buyer {
					id
				}
				seller {
					id
				}
			}
		}`)
	req.Var("first", limit)
	req.Var("orderBy", "timestamp")
	req.Var("orderDirection", "desc")
	req.Var("skip", (pagenumber-1)*1000)
	req.Var("where", opts)

	var respData struct {
		Transactions []*Transaction `json:"transactions"`
	}
	if err := s.graphClient.Run(ctx, req, &respData); err != nil {
		return nil, errors.Wrap(err, "requesting graphql")
	}

	for _, transaction := range respData.Transactions {
		squad, err := s.squadservice.GetSquad(transaction.Nft.TokenID)
		if err != nil {
			log.Error().Err(err).Msgf("getting squad for tokenid %d", transaction.Nft.TokenID)
			continue
		}
		transaction.Squad = squad

		transaction.Score = transaction.Squad.GetScoreByPrice(s.floorService, transaction.AskPrice)
		transaction.Url = fmt.Sprintf("https://pancakeswap.finance/nfts/collections/%s/%d", opts.Collection, transaction.Nft.TokenID)

		transaction.Time = time.Unix(transaction.Timestamp, 0)
		transaction.TimeDescription = humanize.Time(transaction.Time)
		sort.Slice(transaction.Nft.TransactionHistory, func(i, j int) bool {
			return transaction.Nft.TransactionHistory[i].Timestamp > transaction.Nft.TransactionHistory[j].Timestamp
		})
		transaction.IsMine = transaction.Buyer.Address == s.bscaddress || transaction.Seller.Address == s.bscaddress
		transaction.SellerUsername = s.profileService.GetUsername(transaction.Seller.Address)
		transaction.BuyerUsername = s.profileService.GetUsername(transaction.Buyer.Address)
	}

	var res []Transaction
	for _, transaction := range respData.Transactions {
		res = append(res, *transaction)
	}
	return res, nil
}

func (s *TransactionService) GetPageByLimit(ctx context.Context, pagenumber int, limit int, opts WhereOptions) ([]Transaction, error) {
	req := graphql.NewRequest(`
		query getNftsMarketData($first: Int, $skip: Int!, $where: Transaction_filter, $orderBy: Transaction_orderBy, $orderDirection: OrderDirection) {
			transactions(where: $where, first: $first, orderBy: $orderBy, orderDirection: $orderDirection, skip: $skip) {
				id
				block
				timestamp
				askPrice
				netPrice
				nft {
					tokenId
				}
				collection {
					id
				}
				buyer {
					id
				}
				seller {
					id
				}
				withBNB
			}
		}`)
	req.Var("first", limit)
	req.Var("orderBy", "timestamp")
	req.Var("orderDirection", "desc")
	req.Var("skip", (pagenumber-1)*1000)
	req.Var("where", opts)

	var respData struct {
		Transactions []*Transaction `json:"transactions"`
	}
	if err := s.graphClient.Run(ctx, req, &respData); err != nil {
		return nil, errors.Wrap(err, "requesting graphql")
	}

	for _, transaction := range respData.Transactions {
		squad, err := s.squadservice.GetSquad(transaction.Nft.TokenID)
		if err != nil {
			log.Error().Err(err).Msgf("getting squad for tokenid %d", transaction.Nft.TokenID)
			continue
		}
		transaction.Squad = squad

		transaction.Score = 10 / ((float64(squad.Rank) / float64(10000)) * transaction.AskPrice)
		transaction.Url = fmt.Sprintf("https://pancakeswap.finance/nfts/collections/%s/%d", opts.Collection, transaction.Nft.TokenID)

		transaction.Time = time.Unix(transaction.Timestamp, 0)
		transaction.TimeDescription = humanize.Time(transaction.Time)
		transaction.SellerUsername = s.profileService.GetUsername(transaction.Seller.Address)
		transaction.BuyerUsername = s.profileService.GetUsername(transaction.Buyer.Address)
	}

	var res []Transaction
	for _, transaction := range respData.Transactions {
		res = append(res, *transaction)
	}
	return res, nil
}
func (s *TransactionService) GetAll(ctx context.Context, collection string) ([]Transaction, error) {
	var res []Transaction
	currentpage := 1
	whereoptions := WhereOptions{
		Collection:   collection,
		TimestampLte: "",
	}
	now := time.Now()
	tmpmap := make(map[string]Transaction)
loop:
	for {
		log.Debug().Msgf("timestamp : %s", whereoptions.TimestampLte)
		page, err := s.GetPageByLimit(ctx, currentpage, 1000, whereoptions)
		if err != nil {
			return nil, errors.Wrapf(err, "getting page %d", currentpage)
		}
		if len(page) == 0 {
			break
		}
		for _, transaction := range page {
			if transaction.Time.Before(now.Add(-7 * 24 * time.Hour)) {
				break loop
			}
			tmpmap[transaction.Id] = transaction
		}

		currentpage++
		whereoptions.TimestampLte = strconv.Itoa(int(page[len(page)-1].Timestamp))
	}
	for _, transaction := range tmpmap {
		res = append(res, transaction)
	}
	sort.Slice(res, func(i, j int) bool {
		return res[i].Timestamp > res[j].Timestamp
	})
	return res, nil
}