"""把 data_provider 的资金面转给 Web，浏览器不直连交易所。"""
from __future__ import annotations

import logging

import requests
from flask import Blueprint, jsonify, request

from services.runtime.market_data import (
	fetch_derivatives,
	fetch_sentiment_latest,
	fetch_sentiment_metrics,
)

logger = logging.getLogger(__name__)

bp = Blueprint("provider", __name__)


def _http_error(exc: requests.HTTPError):
	status = 502
	detail = str(exc)
	if exc.response is not None:
		status = exc.response.status_code or 502
		try:
			body = exc.response.json()
			detail = body.get("detail") or body.get("error") or detail
		except Exception:
			detail = exc.response.text or detail
	return jsonify({"error": detail}), status


@bp.route("/api/derivatives")
def api_derivatives():
	symbol = (request.args.get("symbol") or "BTC/USDT:USDT").strip()
	exchange = (request.args.get("exchange") or "").strip() or None
	try:
		return jsonify(fetch_derivatives(symbol, exchange))
	except requests.HTTPError as exc:
		return _http_error(exc)
	except Exception as exc:
		logger.warning("derivatives 中转失败: %s", exc)
		return jsonify({"error": str(exc)}), 503


@bp.route("/api/sentiment/latest")
def api_sentiment_latest():
	symbol = (request.args.get("symbol") or "BTC/USDT:USDT").strip()
	try:
		return jsonify(fetch_sentiment_latest(symbol))
	except requests.HTTPError as exc:
		return _http_error(exc)
	except Exception as exc:
		logger.warning("sentiment latest 中转失败: %s", exc)
		return jsonify({"error": str(exc)}), 503


@bp.route("/api/sentiment/metrics")
def api_sentiment_metrics():
	metric = (request.args.get("metric") or "").strip()
	if not metric:
		return jsonify({"error": "metric required"}), 400
	symbol = (request.args.get("symbol") or "BTC/USDT:USDT").strip()
	start = request.args.get("start", type=int)
	end = request.args.get("end", type=int)
	limit = request.args.get("limit", type=int)
	try:
		return jsonify(fetch_sentiment_metrics(metric, symbol, start=start, end=end, limit=limit))
	except requests.HTTPError as exc:
		return _http_error(exc)
	except Exception as exc:
		logger.warning("sentiment 中转失败: %s", exc)
		return jsonify({"error": str(exc)}), 503