package exchange

import (
	"time"

	"github.com/thrasher-corp/gocryptotrader/config"
	"github.com/thrasher-corp/gocryptotrader/currency"
	"github.com/thrasher-corp/gocryptotrader/exchanges/protocol"
	"github.com/thrasher-corp/gocryptotrader/exchanges/request"
	"github.com/thrasher-corp/gocryptotrader/exchanges/websocket/wshandler"
)

// Endpoint authentication types
const (
	RestAuthentication      uint8 = 0
	WebsocketAuthentication uint8 = 1
	// Repeated exchange strings
	// FeeType custom type for calculating fees based on method
	WireTransfer InternationalBankTransactionType = iota
	PerfectMoney
	Neteller
	AdvCash
	Payeer
	Skrill
	Simplex
	SEPA
	Swift
	RapidTransfer
	MisterTangoSEPA
	Qiwi
	VisaMastercard
	WebMoney
	Capitalist
	WesternUnion
	MoneyGram
	Contact
	// Const declarations for fee types
	BankFee FeeType = iota
	InternationalBankDepositFee
	InternationalBankWithdrawalFee
	CryptocurrencyTradeFee
	CyptocurrencyDepositFee
	CryptocurrencyWithdrawalFee
	OfflineTradeFee
	// Definitions for each type of withdrawal method for a given exchange
	NoAPIWithdrawalMethods                  uint32 = 0
	NoAPIWithdrawalMethodsText              string = "NONE, WEBSITE ONLY"
	AutoWithdrawCrypto                      uint32 = (1 << 0)
	AutoWithdrawCryptoWithAPIPermission     uint32 = (1 << 1)
	AutoWithdrawCryptoWithSetup             uint32 = (1 << 2)
	AutoWithdrawCryptoText                  string = "AUTO WITHDRAW CRYPTO"
	AutoWithdrawCryptoWithAPIPermissionText string = "AUTO WITHDRAW CRYPTO WITH API PERMISSION"
	AutoWithdrawCryptoWithSetupText         string = "AUTO WITHDRAW CRYPTO WITH SETUP"
	WithdrawCryptoWith2FA                   uint32 = (1 << 3)
	WithdrawCryptoWithSMS                   uint32 = (1 << 4)
	WithdrawCryptoWithEmail                 uint32 = (1 << 5)
	WithdrawCryptoWithWebsiteApproval       uint32 = (1 << 6)
	WithdrawCryptoWithAPIPermission         uint32 = (1 << 7)
	WithdrawCryptoWith2FAText               string = "WITHDRAW CRYPTO WITH 2FA"
	WithdrawCryptoWithSMSText               string = "WITHDRAW CRYPTO WITH SMS"
	WithdrawCryptoWithEmailText             string = "WITHDRAW CRYPTO WITH EMAIL"
	WithdrawCryptoWithWebsiteApprovalText   string = "WITHDRAW CRYPTO WITH WEBSITE APPROVAL"
	WithdrawCryptoWithAPIPermissionText     string = "WITHDRAW CRYPTO WITH API PERMISSION"
	AutoWithdrawFiat                        uint32 = (1 << 8)
	AutoWithdrawFiatWithAPIPermission       uint32 = (1 << 9)
	AutoWithdrawFiatWithSetup               uint32 = (1 << 10)
	AutoWithdrawFiatText                    string = "AUTO WITHDRAW FIAT"
	AutoWithdrawFiatWithAPIPermissionText   string = "AUTO WITHDRAW FIAT WITH API PERMISSION"
	AutoWithdrawFiatWithSetupText           string = "AUTO WITHDRAW FIAT WITH SETUP"
	WithdrawFiatWith2FA                     uint32 = (1 << 11)
	WithdrawFiatWithSMS                     uint32 = (1 << 12)
	WithdrawFiatWithEmail                   uint32 = (1 << 13)
	WithdrawFiatWithWebsiteApproval         uint32 = (1 << 14)
	WithdrawFiatWithAPIPermission           uint32 = (1 << 15)
	WithdrawFiatWith2FAText                 string = "WITHDRAW FIAT WITH 2FA"
	WithdrawFiatWithSMSText                 string = "WITHDRAW FIAT WITH SMS"
	WithdrawFiatWithEmailText               string = "WITHDRAW FIAT WITH EMAIL"
	WithdrawFiatWithWebsiteApprovalText     string = "WITHDRAW FIAT WITH WEBSITE APPROVAL"
	WithdrawFiatWithAPIPermissionText       string = "WITHDRAW FIAT WITH API PERMISSION"
	WithdrawCryptoViaWebsiteOnly            uint32 = (1 << 16)
	WithdrawFiatViaWebsiteOnly              uint32 = (1 << 17)
	WithdrawCryptoViaWebsiteOnlyText        string = "WITHDRAW CRYPTO VIA WEBSITE ONLY"
	WithdrawFiatViaWebsiteOnlyText          string = "WITHDRAW FIAT VIA WEBSITE ONLY"
	NoFiatWithdrawals                       uint32 = (1 << 18)
	NoFiatWithdrawalsText                   string = "NO FIAT WITHDRAWAL"
	UnknownWithdrawalTypeText               string = "UNKNOWN"
)

// FeeType is the type for holding a custom fee type (International withdrawal fee)
type FeeType uint8

// InternationalBankTransactionType custom type for calculating fees based on fiat transaction types
type InternationalBankTransactionType uint8

// FeeBuilder is the type which holds all parameters required to calculate a fee
// for an exchange
type FeeBuilder struct {
	FeeType FeeType
	// Used for calculating crypto trading fees, deposits & withdrawals
	Pair    currency.Pair
	IsMaker bool
	// Fiat currency used for bank deposits & withdrawals
	FiatCurrency        currency.Code
	BankTransactionType InternationalBankTransactionType
	// Used to multiply for fee calculations
	PurchasePrice float64
	Amount        float64
}

// AccountInfo is a Generic type to hold each exchange's holdings in
// all enabled currencies
type AccountInfo struct {
	Exchange string
	Accounts []Account
}

// Account defines a singular account type with asocciated currencies
type Account struct {
	ID         string
	Currencies []AccountCurrencyInfo
}

// AccountCurrencyInfo is a sub type to store currency name and value
type AccountCurrencyInfo struct {
	CurrencyName currency.Code
	TotalValue   float64
	Hold         float64
}

// TradeHistory holds exchange history data
type TradeHistory struct {
	Timestamp   time.Time
	TID         int64
	Price       float64
	Amount      float64
	Exchange    string
	Type        string
	Fee         float64
	Description string
}

// FundHistory holds exchange funding history data
type FundHistory struct {
	ExchangeName      string
	Status            string
	TransferID        string
	Description       string
	Timestamp         time.Time
	Currency          string
	Amount            float64
	Fee               float64
	TransferType      string
	CryptoToAddress   string
	CryptoFromAddress string
	CryptoTxID        string
	BankTo            string
	BankFrom          string
}

// Features stores the supported and enabled features
// for the exchange
type Features struct {
	Supports FeaturesSupported
	Enabled  FeaturesEnabled
}

// FeaturesEnabled stores the exchange enabled features
type FeaturesEnabled struct {
	AutoPairUpdates bool
}

// FeaturesSupported stores the exchanges supported features
type FeaturesSupported struct {
	REST                  bool
	RESTCapabilities      protocol.Features
	Websocket             bool
	WebsocketCapabilities protocol.Features
	WithdrawPermissions   uint32
}

// API stores the exchange API settings
type API struct {
	AuthenticatedSupport          bool
	AuthenticatedWebsocketSupport bool
	PEMKeySupport                 bool

	Endpoints struct {
		URL                 string
		URLDefault          string
		URLSecondary        string
		URLSecondaryDefault string
		WebsocketURL        string
	}

	Credentials struct {
		Key      string
		Secret   string
		ClientID string
		PEMKey   string
	}

	CredentialsValidator struct {
		// For Huobi (optional)
		RequiresPEM bool

		RequiresKey                bool
		RequiresSecret             bool
		RequiresClientID           bool
		RequiresBase64DecodeSecret bool
	}
}

// Base stores the individual exchange information
type Base struct {
	Name                          string
	Enabled                       bool
	Verbose                       bool
	LoadedByConfig                bool
	SkipAuthCheck                 bool
	API                           API
	BaseCurrencies                currency.Currencies
	CurrencyPairs                 currency.PairsManager
	Features                      Features
	HTTPTimeout                   time.Duration
	HTTPUserAgent                 string
	HTTPRecording                 bool
	HTTPDebugging                 bool
	WebsocketResponseCheckTimeout time.Duration
	WebsocketResponseMaxLimit     time.Duration
	WebsocketOrderbookBufferLimit int64
	Websocket                     *wshandler.Websocket
	*request.Requester
	Config *config.ExchangeConfig
}