"""交易对 / A股 / MACD 配置 API。"""
from flask import Blueprint, jsonify, request
from services.runtime import *  # noqa: F403

bp = Blueprint("symbols", __name__)

@bp.route('/api/symbols')
def get_symbols():
	"""获取可用交易对"""
	refresh_data_service_metadata()
	if SYMBOLS:
		return jsonify(SYMBOLS)
	try:
		markets = exchange.load_markets()
		# 合约交易对通常是以USDT结尾的永续合约
		symbols = [symbol for symbol in markets.keys() if '/USDT' in symbol and ':USDT' in symbol]
		return jsonify(symbols)
	except Exception as e:
		return jsonify(DEFAULT_SYMBOLS)

@bp.route('/api/a_stocks')
def get_a_stocks():
	"""获取A股股票列表"""
	try:
		stock_list = china_stock.get_stock_list()
		return jsonify(stock_list)
	except Exception as e:
		return jsonify({'error': str(e)})

@bp.route('/api/popular_a_stocks')  
def get_popular_a_stocks():
	"""获取热门A股股票"""
	try:
		return jsonify(china_stock.get_popular_stocks())
	except Exception as e:
		return jsonify({'error': str(e)})

@bp.route('/api/sectors')
def get_sectors():
	"""获取所有行业分类"""
	try:
		sectors = china_stock.get_all_sectors()
		return jsonify(sectors)
	except Exception as e:
		return jsonify({'error': str(e)})

@bp.route('/api/stocks_by_sector')
def get_stocks_by_sector():
	"""根据行业获取股票"""
	try:
		sector = request.args.get('sector')
		if sector:
			stocks = china_stock.get_stock_by_sector(sector)
			return jsonify(stocks)
		else:
			# 返回所有行业的股票分组
			all_sectors = china_stock.get_stock_by_sector()
			return jsonify(all_sectors)
	except Exception as e:
		return jsonify({'error': str(e)})

@bp.route('/api/search_stock')
def search_stock():
	"""搜索股票 - 增强版"""
	try:
		keyword = request.args.get('keyword', '')
		if not keyword:
			return jsonify({'error': '搜索关键词不能为空'})
		
		results = china_stock.search_stock(keyword)
		return jsonify(results)
	except Exception as e:
		return jsonify({'error': str(e)})


@bp.route('/api/macd_config', methods=['GET', 'POST'])
def macd_config():
	"""获取或设置MACD参数"""
	global macd_fast_period, macd_slow_period, macd_signal_period
	if request.method == 'GET':
		return jsonify({
			'fast': macd_fast_period,
			'slow': macd_slow_period,
			'signal': macd_signal_period
		})
	else:
		data = request.get_json(silent=True) or {}
		fast = data.get('fast')
		slow = data.get('slow')
		signal = data.get('signal')
		if fast is not None:
			macd_fast_period = int(fast)
		if slow is not None:
			macd_slow_period = int(slow)
		if signal is not None:
			macd_signal_period = int(signal)
		return jsonify({
			'fast': macd_fast_period,
			'slow': macd_slow_period,
			'signal': macd_signal_period
		})