import simplejson as json
import traceback
from functools import wraps
from typing import Union

import flask
import requests
from flask import Request, make_response
from flask import jsonify, request

from llm_server import opts
from llm_server.database.database import is_valid_api_key
from llm_server.routes.auth import parse_token


def cache_control(seconds):
    def decorator(f):
        @wraps(f)
        def decorated_function(*args, **kwargs):
            resp = make_response(f(*args, **kwargs))
            if seconds > 0:
                resp.headers['Cache-Control'] = f'public, max-age={seconds}'
            else:
                resp.headers['Cache-Control'] = f'no-store'
            return resp

        return decorated_function

    return decorator


# TODO:
#   File "/srv/server/local-llm-server/llm_server/routes/request_handler.py", line 240, in before_request
#     response = require_api_key()
#                ^^^^^^^^^^^^^^^^^
#   File "/srv/server/local-llm-server/llm_server/routes/helpers/http.py", line 50, in require_api_key
#     if token.startswith('SYSTEM__') or opts.auth_required:
#        ^^^^^^^^^^^^^^^^
# AttributeError: 'NoneType' object has no attribute 'startswith'


def require_api_key(json_body: dict = None):
    if json_body:
        request_json = json_body
    elif request.headers.get('Content-Type') == 'application/json':
        valid_json, request_json = validate_json(request.data)
        if not valid_json:
            request_json = None
    else:
        request_json = None
    if 'X-Api-Key' in request.headers:
        api_key = request.headers['X-Api-Key']
        if api_key.startswith('SYSTEM__') or opts.auth_required:
            if is_valid_api_key(api_key):
                return
            else:
                return jsonify({'code': 403, 'message': 'Invalid API key'}), 403
    elif 'Authorization' in request.headers:
        token = parse_token(request.headers['Authorization'])
        if (token and token.startswith('SYSTEM__')) or opts.auth_required:
            if is_valid_api_key(token):
                return
            else:
                return jsonify({'code': 403, 'message': 'Invalid API key'}), 403
    else:
        try:
            # Handle websockets
            if opts.auth_required and not request_json:
                # If we didn't get any valid JSON, deny.
                return jsonify({'code': 403, 'message': 'Invalid API key'}), 403

            if request_json and request_json.get('X-API-KEY'):
                api_key = request_json.get('X-API-KEY')
                if api_key.startswith('SYSTEM__') or opts.auth_required:
                    if is_valid_api_key(api_key):
                        return
                    else:
                        return jsonify({'code': 403, 'message': 'Invalid API key'}), 403
        except:
            # TODO: remove this one we're sure this works as expected
            traceback.print_exc()


def validate_json(data: Union[str, flask.Request, requests.models.Response, flask.Response, dict, bytes]):
    if isinstance(data, dict):
        return True, data
    try:
        if isinstance(data, (Request, flask.Response)):
            data = data.json
            return True, data
        elif isinstance(data, requests.models.Response):
            data = data.json()
            return True, data
        elif isinstance(data, bytes):
            s = data.decode('utf-8')
            return False, json.loads(s)
    except Exception as e:
        return False, e
    try:
        j = json.loads(str(data))
        return True, j
    except Exception as e:
        return False, e