package blockchainservicelogic

import (
	"blockchain/internal/domain/usecase"
	"context"
	"fmt"
	"time"

	"blockchain/gen_result/pb/code.30cm.net/digimon/app-cloudep-blockchain"
	"blockchain/internal/svc"

	"github.com/zeromicro/go-zero/core/logx"
)

type ListCandleDataLogic struct {
	ctx    context.Context
	svcCtx *svc.ServiceContext
	logx.Logger
}

func NewListCandleDataLogic(ctx context.Context, svcCtx *svc.ServiceContext) *ListCandleDataLogic {
	return &ListCandleDataLogic{
		ctx:    ctx,
		svcCtx: svcCtx,
		Logger: logx.WithContext(ctx),
	}
}

func (l *ListCandleDataLogic) ListCandleData(in *app_cloudep_blockchain.HistoryReq) (*app_cloudep_blockchain.ListCandleDataResp, error) {
	// 1) 先驗證輸入（避免把錯誤時間丟進背景 goroutine）
	st, err := time.Parse(time.RFC3339, in.GetStartTime())
	if err != nil {
		return nil, fmt.Errorf("invalid startTime (RFC3339): %w", err)
	}
	et, err := time.Parse(time.RFC3339, in.GetEndTime())
	if err != nil {
		return nil, fmt.Errorf("invalid endTime (RFC3339): %w", err)
	}

	kline, err := l.svcCtx.BinanceDataSource.ListKline(l.ctx, usecase.QueryKline{
		Symbol:    in.GetSymbol(),
		Interval:  in.GetInterval(),
		StartTime: st.UnixMilli(),
		EndTime:   et.UnixMilli(),
	})
	if err != nil {
		return nil, err
	}
	res := make([]*app_cloudep_blockchain.Kline, 0, len(kline))

	for _, item := range kline {
		res = append(res, &app_cloudep_blockchain.Kline{
			OpenTime:                 item.OpenTime,
			Open:                     item.Open,
			High:                     item.High,
			Low:                      item.Low,
			Close:                    item.Close,
			Volume:                   item.Volume,
			CloseTime:                item.OpenTime,
			QuoteAssetVolume:         item.QuoteAssetVolume,
			NumberOfTrades:           int32(item.NumberOfTrades),
			TakerBuyBaseAssetVolume:  item.TakerBuyBaseAssetVolume,
			TakerBuyQuoteAssetVolume: item.TakerBuyQuoteAssetVolume,
			Symbol:                   item.Symbol,
			Interval:                 item.Interval,
		})
	}

	return &app_cloudep_blockchain.ListCandleDataResp{
		Data: res,
	}, nil
}