#!/bin/env /bin/python
#  mCaptcha - A proof of work based DoS protection system
#  Copyright © 2023 Aravinth Manivannan <realravinth@batsense.net>
#
#  This program is free software: you can redistribute it and/or modify
#  it under the terms of the GNU Affero General Public License as
#  published by the Free Software Foundation, either version 3 of the
#  License, or (at your option) any later version.
#
#  This program is distributed in the hope that it will be useful,
#  but WITHOUT ANY WARRANTY; without even the implied warranty of
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#  GNU Affero General Public License for more details.
#
#  You should have received a copy of the GNU Affero General Public License
#  along with this program.  If not, see <http://www.gnu.org/licenses/>.

from pprint import pprint
import requests
import grpc
import json

from dcache_py.dcache_pb2 import RaftRequest 
from dcache_py.dcache_pb2_grpc import DcacheServiceStub
#import dcache_py.dcache_resources


def init(host: str):
    resp = requests.post(f"http://{host}/init")
    print(f"Initialization status: {resp.status_code}")


def add_host(host: str, id: int, peer: str):
    params = [id, peer]
    resp = requests.post(f"http://{host}/add-learner", json=params)
    print(f"Adding host {peer}. Status: {resp.status_code}")


def switch_to_cluster(host: str, nodes: [int]):
    resp = requests.post(f"http://{host}/change-membership", json=nodes)
    print(f"Switching to cluster. Status: {resp.status_code}")


def metrics(host: str):
    resp = requests.get(f"http://{host}/metrics")
    data = resp.json()
    pprint(data)


def write(host, data):
    resp = requests.post(f"http://{host}/write", json=data)
    print(f"RPC Status: {resp.status_code}")
    resp = resp.json()
    if "Err" in resp:
        leader = resp["Err"]["APIError"]["ForwardToLeader"]["leader_node"]["addr"]
        print(f"Forwarding write to leader {leader}")
        return write(leader, data)
    return resp["Ok"]["data"]


def add_vote(host: str, captcha_id: str):
    resp = write(host, data={"AddVisitor": captcha_id})
    pprint(resp)


def add_captcha(host: str, captcha_id: str):
    params = {
        "AddCaptcha": {
            "id": captcha_id,
            "mcaptcha": {
                "visitor_threshold": 0,
                "defense": {
                    "levels": [
                        {"visitor_threshold": 50, "difficulty_factor": 500},
                        {"visitor_threshold": 5000, "difficulty_factor": 50000},
                    ],
                    "current_visitor_threshold": 0,
                },
                "duration": 30,
            },
        }
    }
    resp = write(host, data=params)
    pprint(f"Captcha added {captcha_id}: {resp}")


host = "localhost:9001"
peers = [(2, "localhost:9002"), (3, "localhost:9003"), (4, "localhost:9004")]
captcha_id = "test_1"

def initialize_cluster():
    init(host)
    for peer_id, peer in peers:
        add_host(host=host, id=peer_id, peer=peer)

    switch_to_cluster(host, nodes=[1, 2,3,4])

    add_captcha(host, captcha_id)
    add_vote(host, captcha_id)
    for _ in range(0, 600):
        add_vote(host, captcha_id)




def grpc_add_vote(stub: DcacheServiceStub, captcha_id: str):
    msg = RaftRequest(data=json.dumps({"AddVisitor": captcha_id}))
    resp = stub.Write(msg)
    pprint(resp)

def grpc_add_captcha(stub: DcacheServiceStub, captcha_id: str):
    params = {
        "AddCaptcha": {
            "id": captcha_id,
            "mcaptcha": {
                "visitor_threshold": 0,
                "defense": {
                    "levels": [
                        {"visitor_threshold": 50, "difficulty_factor": 500},
                        {"visitor_threshold": 5000, "difficulty_factor": 50000},
                    ],
                    "current_visitor_threshold": 0,
                },
                "duration": 30,
            },
        }
    }
    msg = RaftRequest(data = json.dumps(params)) 
    resp = stub.Write(msg)
    pprint(f"Captcha added {captcha_id}: {resp}")




def grpc_run():
    with grpc.insecure_channel(host) as channel:
        stub = DcacheServiceStub(channel)
#        grpc_add_captcha(stub, captcha_id)
        grpc_add_vote(stub, captcha_id)

if __name__ == "__main__":
    grpc_run()
    #add_vote("localhost:9002", captcha_id)