"""页面路由。"""
from flask import Blueprint, jsonify, render_template, request, send_from_directory
from config import DATA_SERVICE_URL, DATA_SERVICE_WS_URL
from services.runtime import *  # noqa: F403
from services import runtime as R

bp = Blueprint("pages", __name__)

@bp.route('/chan_tv')
def chan_tv():
	"""缠论 TradingView 高级图表页面"""
	return render_template(
		'chan_tv.html',
		data_service_url=DATA_SERVICE_URL,
		data_service_ws_url=DATA_SERVICE_WS_URL,
	)

@bp.route('/charting_library/<path:filename>')
def serve_charting_library(filename):
	"""提供 TradingView Charting Library 静态文件"""
	return send_from_directory('charting_library', filename)

@bp.route('/')
def index():
	"""主页"""
	refresh_data_service_metadata()
	tf_map = TIMEFRAMES if TIMEFRAMES else DEFAULT_TIMEFRAME_LABELS.copy()
	default_main, default_element, default_sub_sub, timeframe_keys = compute_timeframe_defaults(OrderedDict(tf_map))
	symbols = SYMBOLS if SYMBOLS else DEFAULT_SYMBOLS

	default_symbol = 'BTC/USDT:USDT' if 'BTC/USDT:USDT' in symbols else (symbols[0] if symbols else '')

	return render_template(
		'index.html',
		timeframes=tf_map,
		symbols=symbols,
		a_stock_symbols=A_STOCK_SYMBOLS,
		default_main_timeframe=default_main,
		default_element_timeframe=default_element,
		default_sub_sub_timeframe=default_sub_sub,
		default_symbol=default_symbol,
		timeframe_keys_json=json.dumps(timeframe_keys),
		data_service_available=DATA_SERVICE_AVAILABLE,
	)


@bp.route('/api/chart_metadata')
def api_chart_metadata():
	"""
	按数据源返回图表用 K 线周期（中文标签）及主/次/次次默认周期。
	crypto：强制刷新 DATA_SERVICE_URL /health 元信息；
	a_stock：读取 ASHARE_DP_URL 的 /api/v1/klines/available-freqs，不修改全局加密货币 TIMEFRAMES。
	"""
	source = (request.args.get('source') or 'crypto').strip().lower()
	if source not in ('crypto', 'a_stock'):
		source = 'crypto'
	try:
		if source == 'a_stock':
			raw = china_stock.get_available_kline_freqs()
			labels_od = build_timeframe_labels(raw)
		else:
			refresh_data_service_metadata(force=True)
			labels_od = OrderedDict(TIMEFRAMES if TIMEFRAMES else DEFAULT_TIMEFRAME_LABELS.copy())

		default_main, default_element, default_sub_sub, keys = compute_timeframe_defaults(labels_od)
		return jsonify({
			'source': source,
			'timeframes': {k: v for k, v in labels_od.items()},
			'timeframe_keys': keys,
			'default_main': default_main,
			'default_element': default_element,
			'default_sub_sub': default_sub_sub,
		})
	except Exception as exc:
		logger.exception('chart_metadata 失败: %s', exc)
		return jsonify({'error': str(exc)}), 500