package report

import (
	"errors"
	"testing"
	"time"

	"github.com/shopspring/decimal"
	"github.com/thrasher-corp/gocryptotrader/backtester/config"
	"github.com/thrasher-corp/gocryptotrader/backtester/eventhandlers/portfolio/compliance"
	"github.com/thrasher-corp/gocryptotrader/backtester/eventhandlers/statistics"
	"github.com/thrasher-corp/gocryptotrader/backtester/funding"
	"github.com/thrasher-corp/gocryptotrader/currency"
	"github.com/thrasher-corp/gocryptotrader/exchanges/asset"
	gctkline "github.com/thrasher-corp/gocryptotrader/exchanges/kline"
	gctorder "github.com/thrasher-corp/gocryptotrader/exchanges/order"
)

const testExchange = "binance"

func TestGenerateReport(t *testing.T) {
	t.Parallel()
	e := testExchange
	a := asset.Spot
	p := currency.NewPair(currency.BTC, currency.USDT)
	d := Data{
		Config: &config.Config{
			StrategySettings: config.StrategySettings{
				DisableUSDTracking: true,
			},
		},
		OutputPath:   t.TempDir(),
		TemplatePath: "tpl.gohtml",
		OriginalCandles: []*gctkline.Item{
			{
				Candles: []gctkline.Candle{
					{
						Time:             time.Now(),
						Open:             1337,
						High:             1337,
						Low:              1337,
						Close:            1337,
						Volume:           1337,
						ValidationIssues: "hello world!",
					},
				},
			},
		},
		EnhancedCandles: []EnhancedKline{
			{
				Exchange:  e,
				Asset:     a,
				Pair:      p,
				Interval:  gctkline.OneHour,
				Watermark: "Binance - SPOT - BTC-USDT",
				Candles: []DetailedCandle{
					{
						UnixMilli:      time.Date(2020, 12, 12, 0, 0, 0, 0, time.UTC).UnixMilli(),
						Open:           1337,
						High:           1339,
						Low:            1336,
						Close:          1338,
						Volume:         3,
						VolumeColour:   "rgba(47, 194, 27, 0.8)",
						MadeOrder:      true,
						OrderDirection: gctorder.Buy,
						OrderAmount:    decimal.NewFromInt(1337),
						Shape:          "arrowUp",
						Text:           "hi",
						Position:       "aboveBar",
						Colour:         "green",
						PurchasePrice:  50,
					},
					{
						UnixMilli:      time.Date(2020, 12, 12, 1, 0, 0, 0, time.UTC).UnixMilli(),
						Open:           1332,
						High:           1332,
						Low:            1330,
						Close:          1331,
						Volume:         2,
						MadeOrder:      true,
						OrderDirection: gctorder.Buy,
						OrderAmount:    decimal.NewFromInt(1337),
						Shape:          "arrowUp",
						Text:           "hi",
						Position:       "aboveBar",
						Colour:         "green",
						PurchasePrice:  50,
						VolumeColour:   "rgba(252, 3, 3, 0.8)",
					},
					{
						UnixMilli:      time.Date(2020, 12, 12, 2, 0, 0, 0, time.UTC).UnixMilli(),
						Open:           1337,
						High:           1339,
						Low:            1336,
						Close:          1338,
						Volume:         3,
						MadeOrder:      true,
						OrderDirection: gctorder.Buy,
						OrderAmount:    decimal.NewFromInt(1337),
						Shape:          "arrowUp",
						Text:           "hi",
						Position:       "aboveBar",
						Colour:         "green",
						PurchasePrice:  50,
						VolumeColour:   "rgba(47, 194, 27, 0.8)",
					},
					{
						UnixMilli:      time.Date(2020, 12, 12, 3, 0, 0, 0, time.UTC).UnixMilli(),
						Open:           1337,
						High:           1339,
						Low:            1336,
						Close:          1338,
						Volume:         3,
						MadeOrder:      true,
						OrderDirection: gctorder.Buy,
						OrderAmount:    decimal.NewFromInt(1337),
						Shape:          "arrowUp",
						Text:           "hi",
						Position:       "aboveBar",
						Colour:         "green",
						PurchasePrice:  50,
						VolumeColour:   "rgba(252, 3, 3, 0.8)",
					},
					{
						UnixMilli:    time.Date(2020, 12, 12, 4, 0, 0, 0, time.UTC).UnixMilli(),
						Open:         1337,
						High:         1339,
						Low:          1336,
						Close:        1338,
						Volume:       3,
						VolumeColour: "rgba(47, 194, 27, 0.8)",
					},
				},
			},
			{
				Exchange:  "Bittrex",
				Asset:     a,
				Pair:      currency.NewPair(currency.BTC, currency.USD),
				Interval:  gctkline.OneDay,
				Watermark: "BITTREX - SPOT - BTC-USD - 1d",
				Candles: []DetailedCandle{
					{
						UnixMilli:      time.Date(2020, 12, 12, 0, 0, 0, 0, time.UTC).UnixMilli(),
						Open:           1337,
						High:           1339,
						Low:            1336,
						Close:          1338,
						Volume:         3,
						MadeOrder:      true,
						OrderDirection: gctorder.Buy,
						OrderAmount:    decimal.NewFromInt(1337),
						Shape:          "arrowUp",
						Text:           "hi",
						Position:       "aboveBar",
						Colour:         "green",
						PurchasePrice:  50,
						VolumeColour:   "rgba(47, 194, 27, 0.8)",
					},
					{
						UnixMilli:      time.Date(2020, 12, 12, 1, 0, 0, 0, time.UTC).UnixMilli(),
						Open:           1332,
						High:           1332,
						Low:            1330,
						Close:          1331,
						Volume:         2,
						MadeOrder:      true,
						OrderDirection: gctorder.Buy,
						OrderAmount:    decimal.NewFromInt(1337),
						Shape:          "arrowUp",
						Text:           "hi",
						Position:       "aboveBar",
						Colour:         "green",
						PurchasePrice:  50,
						VolumeColour:   "rgba(252, 3, 3, 0.8)",
					},
					{
						UnixMilli:      time.Date(2020, 12, 12, 2, 0, 0, 0, time.UTC).UnixMilli(),
						Open:           1337,
						High:           1339,
						Low:            1336,
						Close:          1338,
						Volume:         3,
						MadeOrder:      true,
						OrderDirection: gctorder.Buy,
						OrderAmount:    decimal.NewFromInt(1337),
						Shape:          "arrowUp",
						Text:           "hi",
						Position:       "aboveBar",
						Colour:         "green",
						PurchasePrice:  50,
						VolumeColour:   "rgba(47, 194, 27, 0.8)",
					},
					{
						UnixMilli:      time.Date(2020, 12, 12, 3, 0, 0, 0, time.UTC).UnixMilli(),
						Open:           1337,
						High:           1339,
						Low:            1336,
						Close:          1338,
						Volume:         3,
						MadeOrder:      true,
						OrderDirection: gctorder.Buy,
						OrderAmount:    decimal.NewFromInt(1337),
						Shape:          "arrowUp",
						Text:           "hi",
						Position:       "aboveBar",
						Colour:         "green",
						PurchasePrice:  50,
						VolumeColour:   "rgba(252, 3, 3, 0.8)",
					},
					{
						UnixMilli:    time.Date(2020, 12, 12, 4, 0, 0, 0, time.UTC).UnixMilli(),
						Open:         1337,
						High:         1339,
						Low:          1336,
						Close:        1338,
						Volume:       3,
						VolumeColour: "rgba(47, 194, 27, 0.8)",
					},
				},
			},
		},
		Statistics: &statistics.Statistic{
			FundingStatistics: &statistics.FundingStatistics{
				Report: &funding.Report{
					DisableUSDTracking: true,
				},
				Items: []statistics.FundingItemStatistics{
					{
						ReportItem: &funding.ReportItem{Snapshots: []funding.ItemSnapshot{{Time: time.Now()}}},
					},
				},
				TotalUSDStatistics: &statistics.TotalFundingStatistics{},
			},
			StrategyName: "testStrat",
			RiskFreeRate: decimal.NewFromFloat(0.03),
			ExchangeAssetPairStatistics: map[string]map[asset.Item]map[*currency.Item]map[*currency.Item]*statistics.CurrencyPairStatistic{
				e: {
					a: {
						p.Base.Item: {
							p.Quote.Item: &statistics.CurrencyPairStatistic{
								LowestClosePrice:         statistics.ValueAtTime{Value: decimal.NewFromInt(100)},
								HighestClosePrice:        statistics.ValueAtTime{Value: decimal.NewFromInt(200)},
								MarketMovement:           decimal.NewFromInt(100),
								StrategyMovement:         decimal.NewFromInt(100),
								CompoundAnnualGrowthRate: decimal.NewFromInt(1),
								BuyOrders:                1,
								SellOrders:               1,
								ArithmeticRatios:         &statistics.Ratios{},
								GeometricRatios:          &statistics.Ratios{},
							},
						},
					},
				},
			},
			TotalBuyOrders:  1337,
			TotalSellOrders: 1330,
			TotalOrders:     200,
			BiggestDrawdown: &statistics.FinalResultsHolder{
				Exchange: e,
				Asset:    a,
				Pair:     p,
				MaxDrawdown: statistics.Swing{
					Highest: statistics.ValueAtTime{
						Time:  time.Now(),
						Value: decimal.NewFromInt(1337),
					},
					Lowest: statistics.ValueAtTime{
						Time:  time.Now(),
						Value: decimal.NewFromInt(137),
					},
					DrawdownPercent: decimal.NewFromInt(100),
				},
				MarketMovement:   decimal.NewFromInt(1377),
				StrategyMovement: decimal.NewFromInt(1377),
			},
			BestStrategyResults: &statistics.FinalResultsHolder{
				Exchange: e,
				Asset:    a,
				Pair:     p,
				MaxDrawdown: statistics.Swing{
					Highest: statistics.ValueAtTime{
						Time:  time.Now(),
						Value: decimal.NewFromInt(1337),
					},
					Lowest: statistics.ValueAtTime{
						Time:  time.Now(),
						Value: decimal.NewFromInt(137),
					},
					DrawdownPercent: decimal.NewFromInt(100),
				},
				MarketMovement:   decimal.NewFromInt(1337),
				StrategyMovement: decimal.NewFromInt(1337),
			},
			BestMarketMovement: &statistics.FinalResultsHolder{
				Exchange: e,
				Asset:    a,
				Pair:     p,
				MaxDrawdown: statistics.Swing{
					Highest: statistics.ValueAtTime{
						Time:  time.Now(),
						Value: decimal.NewFromInt(1337),
					},
					Lowest: statistics.ValueAtTime{
						Time:  time.Now(),
						Value: decimal.NewFromInt(137),
					},
					DrawdownPercent: decimal.NewFromInt(100),
				},
				MarketMovement:   decimal.NewFromInt(1337),
				StrategyMovement: decimal.NewFromInt(1337),
			},
		},
	}
	if err := d.GenerateReport(); err != nil {
		t.Error(err)
	}
}

func TestEnhanceCandles(t *testing.T) {
	t.Parallel()
	tt := time.Now()
	var d Data
	err := d.enhanceCandles()
	if !errors.Is(err, errNoCandles) {
		t.Errorf("received: %v, expected: %v", err, errNoCandles)
	}
	err = d.SetKlineData(&gctkline.Item{})
	if !errors.Is(err, nil) {
		t.Errorf("received: %v, expected: %v", err, nil)
	}
	err = d.enhanceCandles()
	if !errors.Is(err, errStatisticsUnset) {
		t.Errorf("received: %v, expected: %v", err, errStatisticsUnset)
	}
	d.Statistics = &statistics.Statistic{}
	err = d.enhanceCandles()
	if !errors.Is(err, nil) {
		t.Errorf("received: %v, expected: %v", err, nil)
	}

	d.Statistics.ExchangeAssetPairStatistics = make(map[string]map[asset.Item]map[*currency.Item]map[*currency.Item]*statistics.CurrencyPairStatistic)
	d.Statistics.ExchangeAssetPairStatistics[testExchange] = make(map[asset.Item]map[*currency.Item]map[*currency.Item]*statistics.CurrencyPairStatistic)
	d.Statistics.ExchangeAssetPairStatistics[testExchange][asset.Spot] = make(map[*currency.Item]map[*currency.Item]*statistics.CurrencyPairStatistic)
	d.Statistics.ExchangeAssetPairStatistics[testExchange][asset.Spot][currency.BTC.Item] = make(map[*currency.Item]*statistics.CurrencyPairStatistic)
	d.Statistics.ExchangeAssetPairStatistics[testExchange][asset.Spot][currency.BTC.Item][currency.USDT.Item] = &statistics.CurrencyPairStatistic{}

	err = d.SetKlineData(&gctkline.Item{
		Exchange: testExchange,
		Pair:     currency.NewPair(currency.BTC, currency.USDT),
		Asset:    asset.Spot,
		Interval: gctkline.OneDay,
		Candles: []gctkline.Candle{
			{
				Time:   tt,
				Open:   1336,
				High:   1338,
				Low:    1336,
				Close:  1337,
				Volume: 1337,
			},
		},
	})
	if !errors.Is(err, nil) {
		t.Errorf("received: %v, expected: %v", err, nil)
	}
	err = d.enhanceCandles()
	if !errors.Is(err, nil) {
		t.Errorf("received: %v, expected: %v", err, nil)
	}

	err = d.SetKlineData(&gctkline.Item{
		Exchange: testExchange,
		Pair:     currency.NewPair(currency.BTC, currency.USDT),
		Asset:    asset.Spot,
		Interval: gctkline.OneDay,
		Candles: []gctkline.Candle{
			{
				Time:   tt,
				Open:   1336,
				High:   1338,
				Low:    1336,
				Close:  1336,
				Volume: 1337,
			},
			{
				Time:   tt,
				Open:   1336,
				High:   1338,
				Low:    1336,
				Close:  1335,
				Volume: 1337,
			},
		},
	})
	if !errors.Is(err, nil) {
		t.Errorf("received: %v, expected: %v", err, nil)
	}

	err = d.enhanceCandles()
	if !errors.Is(err, nil) {
		t.Errorf("received: %v, expected: %v", err, nil)
	}

	d.Statistics.ExchangeAssetPairStatistics[testExchange][asset.Spot][currency.BTC.Item][currency.USDT.Item].FinalOrders = compliance.Snapshot{
		Orders: []compliance.SnapshotOrder{
			{
				ClosePrice:          decimal.NewFromInt(1335),
				VolumeAdjustedPrice: decimal.NewFromInt(1337),
				SlippageRate:        decimal.NewFromInt(1),
				CostBasis:           decimal.NewFromInt(1337),
				Order:               nil,
			},
		},
		Timestamp: tt,
	}
	err = d.enhanceCandles()
	if !errors.Is(err, nil) {
		t.Errorf("received: %v, expected: %v", err, nil)
	}

	d.Statistics.ExchangeAssetPairStatistics[testExchange][asset.Spot][currency.BTC.Item][currency.USDT.Item].FinalOrders = compliance.Snapshot{
		Orders: []compliance.SnapshotOrder{
			{
				ClosePrice:          decimal.NewFromInt(1335),
				VolumeAdjustedPrice: decimal.NewFromInt(1337),
				SlippageRate:        decimal.NewFromInt(1),
				CostBasis:           decimal.NewFromInt(1337),
				Order: &gctorder.Detail{
					Date: tt,
					Side: gctorder.Buy,
				},
			},
		},
		Timestamp: tt,
	}
	err = d.enhanceCandles()
	if !errors.Is(err, nil) {
		t.Errorf("received: %v, expected: %v", err, nil)
	}

	d.Statistics.ExchangeAssetPairStatistics[testExchange][asset.Spot][currency.BTC.Item][currency.USDT.Item].FinalOrders = compliance.Snapshot{
		Orders: []compliance.SnapshotOrder{
			{
				ClosePrice:          decimal.NewFromInt(1335),
				VolumeAdjustedPrice: decimal.NewFromInt(1337),
				SlippageRate:        decimal.NewFromInt(1),
				CostBasis:           decimal.NewFromInt(1337),
				Order: &gctorder.Detail{
					Date: tt,
					Side: gctorder.Sell,
				},
			},
		},
		Timestamp: tt,
	}
	err = d.enhanceCandles()
	if !errors.Is(err, nil) {
		t.Errorf("received: %v, expected: %v", err, nil)
	}

	if len(d.EnhancedCandles) == 0 {
		t.Error("expected enhanced candles")
	}
}

func TestUpdateItem(t *testing.T) {
	t.Parallel()
	d := Data{}
	tt := time.Now()
	err := d.SetKlineData(&gctkline.Item{
		Candles: []gctkline.Candle{
			{
				Time: tt,
			},
		},
	})
	if !errors.Is(err, nil) {
		t.Errorf("received: %v, expected: %v", err, nil)
	}
	if len(d.OriginalCandles) != 1 {
		t.Fatal("expected Original Candles len of 1")
	}
	if len(d.OriginalCandles[0].Candles) != 1 {
		t.Error("expected one candle")
	}
	err = d.SetKlineData(&gctkline.Item{
		Candles: []gctkline.Candle{
			{
				Time: tt,
			},
		},
	})
	if !errors.Is(err, nil) {
		t.Errorf("received: %v, expected: %v", err, nil)
	}
	if len(d.OriginalCandles[0].Candles) != 1 {
		t.Error("expected one candle")
	}

	err = d.SetKlineData(&gctkline.Item{
		Candles: []gctkline.Candle{
			{
				Time: tt.Add(gctkline.OneMin.Duration()),
			},
		},
	})
	if !errors.Is(err, nil) {
		t.Errorf("received: %v, expected: %v", err, nil)
	}
	if len(d.OriginalCandles[0].Candles) != 2 {
		t.Error("expected two candles")
	}
}

func TestCopyCloseFromPreviousEvent(t *testing.T) {
	t.Parallel()
	d := DetailedCandle{}
	d.copyCloseFromPreviousEvent(&EnhancedKline{
		Candles: []DetailedCandle{
			{
				Close: 1337,
			},
		},
	})
	if d.Close != 1337 {
		t.Error("expected 1337")
	}
}

func TestUseDarkMode(t *testing.T) {
	t.Parallel()
	d := Data{}
	d.UseDarkMode(true)
	if !d.UseDarkTheme {
		t.Error("expected true")
	}
}