import psycopg2
import os
import json
from flask import Flask, request, jsonify, render_template

config_dir_path = "./config/"
server_config_path = config_dir_path + "server.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",
            "log_channel_id" : "TYPE HERE CHANNEL ID (YOU MUST USE INT !!!!)",
            "config_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 check(self, pc_number, password):
        try:
            cursor = self.db.cursor()
            cursor.execute("SELECT * FROM pc_list WHERE pc_number = %s AND password_hash = %s", (pc_number, password))
            pc_info = cursor.fetchall()
            if not pc_info:
                return 1
            else:
                return 0
        finally:
            cursor.close()
        
    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()
        finally:
            cursor.close()

    def stop(self, **kwargs):
        try:
            pc_number = int(kwargs["pc_number"])
            cursor = self.db.cursor()
            cursor.execute("SELECT * FROM pc_list WHERE pc_number = %s", (pc_number,))
            pc_list_record = cursor.fetchall()
            if not pc_list_record[0][1] == None:
                cursor.execute("UPDATE pc_list SET using_user_id = NULL WHERE pc_number = %s", (pc_number,))
            
                if not pc_list_record[0][2] == None:
                    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_list_record[0][1], pc_number))
                pc_usage_history_record = cursor.fetchall()
                cursor.execute("UPDATE pc_usage_history SET end_use_time = current_timestamp WHERE id = %s", (pc_usage_history_record[0][0],))
                self.db.commit()
                result = {"result": "ok"}

            else:
                result = {"result": "not_used"}

        except:
            result = {"result": "error"}
        
        finally:
            cursor.close()
            return result



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('/verify', methods=['POST'])
def verify():
    pc_number = int(request.json.get('pc_number'))
    password = request.json.get('password')
    print(str(pc_number) + "の認証処理を開始...")

    if auth.check(pc_number, password) == 0:
        auth.delete(pc_number)
        print(str(pc_number) + "の認証処理は成功しました.")
        return jsonify({'message': 'ok'}), 200
    else:
        print(str(pc_number) + "の認証処理は失敗しました.")
        return jsonify({'message': 'damedesu'}), 401
    
@app.route('/stop', methods=['POST'])
def stop():
    pc_number = int(request.json.get('pc_number'))
    print(str(pc_number) + "の使用停止処理を開始...")
    pc_stop = auth.stop(pc_number=pc_number)
    if pc_stop["result"] == "ok":
        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


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