import psycopg2
import os
import json
from flask import Flask, request, jsonify, render_template
import uuid
import string
import random
import hashlib

config_dir_path = "./config/"
server_config_path = config_dir_path + "server.json"
onetime_config_path = config_dir_path + "onetime.json"
if not os.path.isfile(server_config_path):
    if not os.path.isdir(config_dir_path):
        os.mkdir(config_dir_path)

    server_config = {
        "db": {
            "host": "localhost",
            "port": "5432",
            "db_name": "dislocker",
            "username": "user",
            "password": "password"
        },
        "bot": {
            "token": "TYPE HERE BOTS TOKEN KEY",
            "activity": {
                "name": "Dislocker",
                "details": "ロック中...",
                "type": "playing",
                "state": "ロック中..."
            },
            "log_channel_id" : "TYPE HERE CHANNEL ID (YOU MUST USE INT !!!!)",
            "config_channel_id": "TYPE HERE CHANNEL ID (YOU MUST USE INT !!!!)",
            "config_public_channel_id": "TYPE HERE CHANNEL ID (YOU MUST USE INT !!!!)"
        }
    }
    with open(server_config_path, "w") as w:
        json.dump(server_config, w, indent=4)
elif os.path.isfile(server_config_path):
    with open(server_config_path, "r") as r:
        server_config = json.load(r)

class Auth():
    def __init__(self, host, db, port, user, password):
        self.db = psycopg2.connect(f"host={host} dbname={db} port={port} user={user} password={password}")
    
    def token_generate(self, length):
        letters = string.ascii_letters + string.digits
        token = ''.join(random.choice(letters) for _ in range(length))
        return token

    def master_password_generate(self, length):
        characters = string.ascii_letters + string.digits + string.punctuation
        master_password = ''.join(random.choice(characters) for _ in range(length))
        return master_password
    
    def hash_genarate(self, source):
        hashed = hashlib.sha256(source.encode())
        return hashed.hexdigest()

    def check(self, **kwargs):
        try:
            cursor = self.db.cursor()
            pc_number = int(kwargs["pc_number"])
            pc_uuid = str(kwargs["pc_uuid"])
            pc_token = str(kwargs["pc_token"])
            device_list = kwargs["device_list"]
            keyboard_number = "own"
            mouse_number = "own"

            if "password_hash" in kwargs:
                password_hash = str(kwargs["password_hash"])
                cursor.execute("SELECT * FROM pc_list WHERE pc_number = %s AND password_hash = %s AND pc_uuid = %s AND pc_token = %s", (pc_number, password_hash, pc_uuid, pc_token))
                pc_info = cursor.fetchall()
                if pc_info:
                    for device in device_list:
                        cursor.execute("SELECT * FROM keyboard_list WHERE device_instance_path = %s", (device["device_instance_path"],))
                        keyboard_record = cursor.fetchall()
                        if keyboard_record:
                            keyboard_number = int(keyboard_record[0][0])
                            break
                        else:
                            pass
                    
                    for device in device_list:
                        cursor.execute("SELECT * FROM mouse_list WHERE device_instance_path = %s", (device["device_instance_path"],))
                        mouse_record = cursor.fetchall()
                        if mouse_record:
                            mouse_number = int(mouse_record[0][0])
                            break
                        else:
                            pass

                    return {"result": 0, "about": "ok", "output_dict": {"keyboard_number": keyboard_number, "mouse_number": mouse_number}}
                else:
                    return {"result": 1, "about": "incorrect_password"}
            else:
                cursor.execute("SELECT * FROM pc_list WHERE pc_number = %s AND pc_uuid = %s AND pc_token = %s", (pc_number, pc_uuid, pc_token))
                pc_info = cursor.fetchall()
                if pc_info:
                    return {"result": 0, "about": "ok"}
                else:
                    return {"result": 1, "about": "unregistered_pc"}

        except Exception as error:
            print("PCの登録状況を調査中にエラーが発生しました。\nエラー内容")
            print(str(error.__class__.__name__))
            print(str(error.args))
            print(str(error))
            return {"result": 1, "about": "error"}

        finally:
            cursor.close()
    
    def device_use_register(self, **kwargs):
        try:
            pc_number = int(kwargs["pc_number"])
            if kwargs["keyboard_number"] == "own":
                keyboard_number = 0
            else:
                keyboard_number = int(kwargs["keyboard_number"])

            if kwargs["mouse_number"] == "own":
                mouse_number = 0
            else:
                mouse_number = int(kwargs["mouse_number"])
                

            cursor = self.db.cursor()
            cursor.execute("SELECT * FROM pc_list WHERE pc_number = %s", (pc_number,))
            pc_list_record = cursor.fetchall()
            pc_using_member_id = pc_list_record[0][1]
            if pc_using_member_id == None:
                return {"result": 1, "about": "not_used"}
            else:
                cursor.execute("SELECT * FROM pc_usage_history WHERE member_id = %s AND pc_number = %s ORDER BY id DESC LIMIT 1", (pc_using_member_id, pc_number))
                pc_usage_history_record = cursor.fetchall()
                pc_usage_history_record_id = pc_usage_history_record[0][0]
                
                cursor.execute("UPDATE pc_usage_history SET keyboard_number = %s, mouse_number = %s WHERE id = %s", (keyboard_number, mouse_number, pc_usage_history_record_id))

                if keyboard_number == 0:
                    pass
                else:
                    cursor.execute("UPDATE keyboard_list SET using_member_id = %s WHERE keyboard_number = %s", (pc_using_member_id, keyboard_number))
                
                if mouse_number == 0:
                    pass
                else:
                    cursor.execute("UPDATE mouse_list SET using_member_id = %s WHERE mouse_number = %s", (pc_using_member_id, mouse_number))

                self.db.commit()
                return {"result": 0, "about": "ok"}
            
        except Exception as error:
            print("デバイスの使用登録中にエラーが発生しました。\nエラー内容")
            print(str(error.__class__.__name__))
            print(str(error.args))
            print(str(error))
            return {"result": 1, "about": "error"}
    
    def device_register(self, **kwargs):
        try:
            cursor = self.db.cursor()
            mode = kwargs["mode"]
            number = kwargs["number"]
            device_instance_path = kwargs["device_instance_path"]
            device_name = kwargs["device_name"]

            if mode == "keyboard":
                keyboard_number = int(kwargs["number"])
                cursor.execute("SELECT * FROM keyboard_list WHERE keyboard_number = %s", (keyboard_number,))
                keyboard_record = cursor.fetchall()
                if keyboard_record:
                    cursor.execute("UPDATE keyboard_list SET device_instance_path = %s, device_name = %s WHERE keyboard_number = %s", (device_instance_path, device_name, keyboard_number))
                    self.db.commit()
                    return {"result": 0, "about": "ok"}
                else:
                    cursor.execute("INSERT INTO keyboard_list (keyboard_number, device_instance_path, device_name) VALUES (%s, %s, %s)", (keyboard_number, device_instance_path, device_name))
                    return {"result": 0, "about": "ok"}
            elif mode == "mouse":
                mouse_number = int(kwargs["number"])
                cursor.execute("SELECT * FROM mouse_list WHERE mouse_number = %s", (mouse_number,))
                mouse_record = cursor.fetchall()
                if mouse_record:
                    cursor.execute("UPDATE mouse_list SET device_instance_path = %s, device_name = %s WHERE mouse_number = %s", (device_instance_path, device_name, mouse_number))
                    self.db.commit()
                    return {"result": 0, "about": "ok"}
                else:
                    cursor.execute("INSERT INTO mouse_list (mouse_number, device_instance_path, device_name) VALUES (%s, %s, %s)", (mouse_number, device_instance_path, device_name))
                    return {"result": 0, "about": "ok"}
            
        except Exception as error:
            print("停止処理中にエラーが発生しました。\nエラー内容")
            print(str(error.__class__.__name__))
            print(str(error.args))
            print(str(error))
            return {"result": 1, "about": "error"}

    def delete(self, pc_number):
        try:
            cursor = self.db.cursor()
            cursor.execute("UPDATE pc_list SET password_hash = NULL WHERE pc_number = %s", (pc_number,))
            self.db.commit()
            return {"result": 0, "about": "ok"}

        except Exception as error:
            print("パスワードの削除中にエラーが発生しました。\nエラー内容")
            print(str(error.__class__.__name__))
            print(str(error.args))
            print(str(error))
            return {"result": 1, "about": "error"}
        
        finally:
            cursor.close()

    def user_register_check(self, **kwargs):
        try:
            discord_user_id = str(kwargs["discord_user_id"])
            
            cursor = self.db.cursor()

            cursor.execute("SELECT * FROM club_member WHERE discord_user_id = %s", (discord_user_id,))
            user_record = cursor.fetchall()
            #ユーザーデータが見つかった場合(登録済みの場合)
            if user_record:
                member_id = user_record[0][0]
                name = user_record[0][1]
                discord_user_name = user_record[0][2]
                return {"result": 0, "about": "exist", "user_info": {"member_id": member_id, "name": name, "discord_user_name": discord_user_name}}
            #ユーザーデータがなかったら(未登録の場合)
            else:
                return {"result": 1, "about": "user_data_not_found"}

        except Exception as error:
            print("ユーザーの登録状況を調査中にエラーが発生しました。\nエラー内容")
            print(str(error.__class__.__name__))
            print(str(error.args))
            print(str(error))
            return {"result": 1, "about": "error"}
        
        finally:
            cursor.close()

    def stop(self, **kwargs):
        # bot側のfstopを基に
        try:
            pc_number = kwargs["pc_number"]
            cursor = self.db.cursor()
            cursor.execute("SELECT * FROM pc_list WHERE pc_number = %s", (pc_number,))
            pc_list_record = cursor.fetchall()
            pc_using_member_id = pc_list_record[0][1]
            pc_password_hash = pc_list_record[0][2]
            if pc_using_member_id == None:
                return {"result": 1, "about": "not_used"}
            else:
                cursor.execute("UPDATE pc_list SET using_member_id = NULL WHERE pc_number = %s", (pc_number,))
                if pc_password_hash == None:
                    pass
                else:
                    cursor.execute("UPDATE pc_list SET password_hash = NULL WHERE pc_number = %s", (pc_number,))
                cursor.execute("SELECT * FROM pc_usage_history WHERE member_id = %s AND pc_number = %s ORDER BY id DESC LIMIT 1", (pc_using_member_id, pc_number))
                pc_usage_history_record = cursor.fetchall()
                pc_usage_history_record_id = pc_usage_history_record[0][0]
                keyboard_number = pc_usage_history_record[0][3]
                mouse_number = pc_usage_history_record[0][4]
                if keyboard_number == None:
                    pass
                else:
                    # keyboard_listの使用中ユーザーを消す
                    cursor.execute("UPDATE keyboard_list SET using_member_id = NULL WHERE keyboard_number = %s", (keyboard_number,))
                if mouse_number == None:
                    pass
                else:
                    # mouse_listの使用中ユーザーを消す
                    cursor.execute("UPDATE mouse_list SET using_member_id = NULL WHERE mouse_number = %s", (mouse_number,))
                cursor.execute("UPDATE pc_usage_history SET end_use_time = clock_timestamp() WHERE id = %s", (pc_usage_history_record_id,))
                self.db.commit()
                return {"result": 0, "about": "ok"}
                
        except Exception as error:
            print("停止処理中にエラーが発生しました。\nエラー内容")
            print(str(error.__class__.__name__))
            print(str(error.args))
            print(str(error))
            return {"result": 1, "about": "error"}

        finally:
            cursor.close()

    def register(self, **kwargs):
        try:
            cursor = self.db.cursor()
            pc_number = int(kwargs["pc_number"])
            pc_uuid = str(kwargs["pc_uuid"])
            cursor.execute("SELECT pc_uuid FROM pc_list WHERE pc_number = %s", (pc_number,))
            pc_record = cursor.fetchall()
            pc_record_uuid = pc_record[0][0]
            if pc_record_uuid == None:
                pc_token = self.token_generate(36)
                master_password = self.master_password_generate(16)
                master_password_hash = self.hash_genarate(master_password)
                cursor.execute("UPDATE pc_list SET pc_uuid = %s, pc_token = %s, master_password = %s WHERE pc_number = %s", (pc_uuid, pc_token, master_password, pc_number))
                self.db.commit()
                return {"result": 0, "about": "ok", "output_dict": {"pc_token": pc_token, "master_password": master_password, "master_password_hash": master_password_hash}}
            else:
                return {"result": 1, "about": "exist"}
            
        except Exception as error:
            print("停止処理中にエラーが発生しました。\nエラー内容")
            print(str(error.__class__.__name__))
            print(str(error.args))
            print(str(error))
            return {"result": 1, "about": "error"}

        finally:
            cursor.close()


app = Flask(__name__, static_folder="./resource/")
auth = Auth(server_config["db"]["host"], server_config["db"]["db_name"], server_config["db"]["port"], server_config["db"]["username"], server_config["db"]["password"])

@app.route('/register', methods=['POST'])
def register():
    pc_number = int(request.json.get('pc_number'))
    pc_uuid = str(request.json.get('pc_uuid'))
    onetime_password = str(request.json.get('onetime'))

    if os.path.isfile(onetime_config_path):
        with open(onetime_config_path, "r") as r:
            onetime_config = json.load(r)
        
        if onetime_password == onetime_config["onetime"]["pc_register"]:
            register_result = auth.register(pc_number=pc_number, pc_uuid=pc_uuid)
            pc_token = register_result["output_dict"]["pc_token"]
            master_password = register_result["output_dict"]["master_password"]
            master_password_hash = register_result["output_dict"]["master_password_hash"]
            onetime_config["onetime"]["pc_register"] = None
            with open(onetime_config_path, "w") as w:
                json.dump(onetime_config, w, indent=4)
            return jsonify({'message': 'ok', 'pc_token': pc_token, 'master_password': master_password, 'master_password_hash': master_password_hash}), 200
        else:
            return jsonify({'message': 'damedesu'}), 401
    else:
        return jsonify({'message': 'damedesu'}), 401

@app.route('/verify', methods=['POST'])
def verify():
    pc_number = int(request.json.get('pc_number'))
    password_hash = request.json.get('password')
    pc_uuid = request.json.get('pc_uuid')
    pc_token = request.json.get('pc_token')
    devices = request.json.get('devices')

    print(str(pc_number) + "の認証処理を開始...")
    pc_auth = auth.check(pc_number=pc_number, password_hash=password_hash, pc_uuid=pc_uuid, pc_token=pc_token, device_list=devices)

    if pc_auth["result"] == 0:
        auth.delete(pc_number)
        auth.device_use_register(pc_number=pc_number, keyboard_number=pc_auth["output_dict"]["keyboard_number"], mouse_number=pc_auth["output_dict"]["mouse_number"])
        print(str(pc_number) + "の認証処理は成功しました.")
        return jsonify({'message': 'ok'}), 200
    elif pc_auth["result"] == 1:
        if pc_auth["about"] == "incorrect_password":
            print(str(pc_number) + "の認証処理はパスワードが正しくないため失敗しました.")
            return jsonify({'message': 'incorrect_password'}), 401
        else:
            print(str(pc_number) + "の認証処理は失敗しました.")
            return jsonify({'message': 'damedesu'}), 500
    
@app.route('/stop', methods=['POST'])
def stop():
    pc_number = int(request.json.get('pc_number'))
    pc_uuid = str(request.json.get('pc_uuid'))
    pc_token = str(request.json.get('pc_token'))
    print(str(pc_number) + "の使用停止処理を開始...")

    pc_auth = auth.check(pc_number=pc_number, pc_uuid=pc_uuid, pc_token=pc_token)

    if pc_auth["result"] == 0:
        pc_stop = auth.stop(pc_number=pc_number)
        if pc_stop["result"] == 0:
            print(str(pc_number) + "の使用停止処理は成功しました.")
            return jsonify({'message': 'ok'}), 200
        else:
            print(str(pc_number) + "の使用停止処理は失敗しました.")
            return jsonify({'message': 'error'}), 500
    else:
        return jsonify({'message': 'damedesu'}), 401

@app.route('/device_register', methods=['POST'])
def device_register():
    onetime_password = str(request.json.get('onetime'))
    mode = str(request.json.get('mode'))
    number = int(request.json.get('number'))
    device_instance_path = str(request.json.get('device_instance_path'))
    device_name = str(request.json.get('device_name'))

    if os.path.isfile(onetime_config_path):
        with open(onetime_config_path, "r") as r:
            onetime_config = json.load(r)
        
        if onetime_password == onetime_config["onetime"]["device_register"]:
            if mode == "keyboard":
                print("キーボードの登録処理を開始...")
                device_register = auth.device_register(mode="keyboard", number=number, device_instance_path=device_instance_path, device_name=device_name)
                if device_register["result"] == 0:
                    print(f"キーボード {number} 番の登録処理は成功しました.")
                    onetime_config["onetime"]["device_register"] = None
                    with open(onetime_config_path, "w") as w:
                        json.dump(onetime_config, w, indent=4)
                    return jsonify({'message': 'ok'}), 200
                else:
                    print(f"キーボード {number} 番の登録処理は失敗しました.")
                    return jsonify({'message': 'error'}), 500
            elif mode == "mouse":
                print("マウスの登録処理を開始...")
                device_register = auth.device_register(mode="mouse", number=number, device_instance_path=device_instance_path, device_name=device_name)
                if device_register["result"] == 0:
                    print(f"マウス {number} 番の登録処理は成功しました.")
                    onetime_config["onetime"]["device_register"] = None
                    with open(onetime_config_path, "w") as w:
                        json.dump(onetime_config, w, indent=4)
                    return jsonify({'message': 'ok'}), 200
                else:
                    print(f"マウス {number} 番の登録処理は失敗しました.")
                    return jsonify({'message': 'error'}), 500
        else:
            return jsonify({'message': 'damedesu'}), 401


if __name__ == '__main__':
    app.run(host="0.0.0.0", port=5000, debug=False)