import { TradeOrder, OrderType, MarketType, AutoTradeConfig, WatchlistGroup, ReservedOrder, StockTick } from '../types';
import { API_BASE_URL, getHeaders } from './config';

export interface HoldingItem {
  code: string;
  name: string;
  avgPrice: number;
  quantity: number;
  market: MarketType;
  currentPrice: number; // Added
  profit: number; // Added
  profitRate: number; // Added
}

export class DbService {
  constructor() {}

  // --- Holdings ---
  async getHoldings(): Promise<HoldingItem[]> {
    try {
      const res = await fetch(`${API_BASE_URL}/account/holdings`);
      if (!res.ok) return [];
      const data = await res.json();
      // Map API response to HoldingItem
      // API returns: { stockCode, stockName, quantity, avgPrice, currentPrice, profit, profitRate }
      return data.map((h: any) => ({
        code: h.stockCode,
        name: h.stockName,
        avgPrice: h.avgPrice,
        quantity: h.quantity,
        market: h.stockCode.length > 6 ? MarketType.OVERSEAS : MarketType.DOMESTIC,
        currentPrice: h.currentPrice,
        profit: h.profit,
        profitRate: h.profitRate
      }));
    } catch (e) {
      console.error("Failed to fetch holdings", e);
      return [];
    }
  }

  async getAccountSummary() {
      try {
          const res = await fetch(`${API_BASE_URL}/account/balance?market=Domestic`); // Default
          if (!res.ok) return { totalAssets: 0, buyingPower: 0 };
          const data = await res.json();
          // API returns complex object. We might need to simplify or use /account/summary if exists.
          // Or calculate from holdings + cash?
          // Using a simplified assumption or endpoints.
          // Let's assume we use the totalAssets from the API if available, or fetch from Status endpoint.
          // Actually, we verified /account/balance returns KIS raw data.
          // We should implemented a summary endpoint or parse raw data.
          // For now, let's return a basic structure.
          return {
             totalAssets: parseFloat(data.output2?.tot_evlu_amt || "0"),
             buyingPower: parseFloat(data.output2?.dnca_tot_amt || "0")
          };
      } catch (e) {
          return { totalAssets: 0, buyingPower: 0 };
      }
  }

  // --- Reserved Orders ---
  async getReservedOrders(): Promise<ReservedOrder[]> {
    const res = await fetch(`${API_BASE_URL}/reserved-orders`);
    if (!res.ok) return [];
    return await res.json();
  }

  async saveReservedOrder(order: ReservedOrder) {
      // POST
      // Map Frontend Order to Backend Request
      const payload = {
          stockCode: order.stockCode,
          stockName: order.stockName,
          monitoringType: order.monitoringType,
          triggerPrice: order.triggerPrice,
          orderType: order.type,
          quantity: order.quantity,
          price: order.price || 0,
          trailingType: order.trailingType,
          trailingValue: order.trailingValue,
          stopLossValue: order.stopLossValue
      };
      
      const res = await fetch(`${API_BASE_URL}/reserved-orders`, {
          method: 'POST',
          headers: getHeaders(),
          body: JSON.stringify(payload)
      });
      return await res.json();
  }

  async deleteReservedOrder(id: string) {
      await fetch(`${API_BASE_URL}/reserved-orders/${id}`, {
          method: 'DELETE'
      });
  }
  
  // --- Auto Trade Configs ---
  async getAutoConfigs(): Promise<AutoTradeConfig[]> {
      const res = await fetch(`${API_BASE_URL}/auto-trade/configs`);
      if (!res.ok) return [];
      return await res.json();
  }
  
  async saveAutoConfig(config: AutoTradeConfig) {
      await fetch(`${API_BASE_URL}/auto-trade/configs`, {
          method: 'POST',
          headers: getHeaders(),
          body: JSON.stringify(config)
      });
  }
  
  async deleteAutoConfig(id: string) {
      await fetch(`${API_BASE_URL}/auto-trade/configs/${id}`, {
          method: 'DELETE'
      });
  }

  // --- Watchlist Groups ---
  async getWatchlistGroups(): Promise<WatchlistGroup[]> {
      const res = await fetch(`${API_BASE_URL}/watchlists/groups`);
      if (!res.ok) return [];
      return await res.json();
  }

  // --- Ticks (Optional, might be local only or via API) ---
  // If backend doesn't support generic tick history per session, keep local or ignore.
  async saveStockTick(tick: StockTick) {
      // No-op or keep local? 
      // Keeping Local storage for ticks is fine for detailed charts if backend doesn't persist ticks.
      // Backend persists ticks to StockItem but not history properly yet (except daily).
  }
  
  async getStockTicks(code: string): Promise<StockTick[]> {
      return []; 
  }
  
  // Helpers not needed with real API usually
  async syncOrderToHolding(order: TradeOrder) {
      // Refresh holdings from server instead of calculating
      return await this.getHoldings();
  }
  
  // Write-only wrappers
  async updateWatchlistGroup(group: WatchlistGroup) {
      // Use PUT if available or POST
  }
  
  async saveWatchlistGroup(group: WatchlistGroup) {
       // POST
  }
  
  async deleteWatchlistGroup(id: string) {
      // DELETE
  }
}