package adapter

import (
	"time"
)

// DataSourceAdapter 数据源适配器接口
type DataSourceAdapter interface {
	// Connect 建立连接
	Connect(config map[string]string) error
	
	// SubscribeTicks 订阅实时Tick
	SubscribeTicks(symbols []string, callback TickCallback) error
	
	// FetchKLines 拉取历史K线
	FetchKLines(symbol, start, end, freq string) ([]KLineData, error)
	
	// FetchSymbols 获取标的列表
	FetchSymbols(assetType string) ([]SymbolInfo, error)
	
	// FetchTradingCalendar 获取交易日历
	FetchTradingCalendar(exchange, start, end string) ([]TradeCalData, error)
	
	// HealthCheck 健康检查
	HealthCheck() error
	
	// Close 关闭连接
	Close() error
}

// TickCallback Tick数据回调
type TickCallback func(symbol string, tick TickData)

// TickData Tick数据
type TickData struct {
	Symbol string
	Price  float64
	Volume int64
	Time   int64
}

// KLineData K线数据
type KLineData struct {
	Symbol       string
	Time         int64
	Open         float64
	High         float64
	Low          float64
	Close        float64
	Volume       int64
	Amount       float64
	OpenInterest int64
}

// SymbolInfo 标的信息
type SymbolInfo struct {
	SymbolID      string
	Name          string
	Exchange      string
	Underlying    string
	ContractMonth string
	ListDate      string
	DelistDate    string
}

// TradeCalData 交易日历数据
type TradeCalData struct {
	Date            time.Time
	IsTradingDay    bool
	HasNightSession bool
}

// AdapterFactory 适配器工厂
type AdapterFactory interface {
	Create(name string) (DataSourceAdapter, error)
}