from datetime import datetime
import json
import time
import random

global MOCK_LIC_USE_INFO
MOCK_LIC_USE_INFO = {
  "27003@szmaslic03": {
    "name": "27003@szmaslic03",
    "total": 2,
    "used": 1,
    "used_info": [
      {
        "user": "haoxiang.ran",
        "host": "szl3bc12808",
        "lic": "szmaslic03",
        "login": "0.41h"
      }
    ]
  },
  "27003@szmaslic04": {
    "name": "27003@szmaslic04",
    "total": 2,
    "used": 1,
    "used_info": [
      {
        "user": "macro.yang",
        "host": "szl3bc12804",
        "lic": "szmaslic04",
        "login": "52.28h"
      }
    ]
  },
  "27003@szmaslic06": {
    "name": "27003@szmaslic06",
    "total": 2,
    "used": 2,
    "used_info": [
      {
        "user": "zhenhao.he",
        "host": "szl3bc12804",
        "lic": "szmaslic06",
        "login": "0.20h"
      },
      {
        "user": "phillip.chan",
        "host": "szl3bc12810",
        "lic": "szmaslic06",
        "login": "0.16h"
      }
    ]
  },
  "27003@szmaslic07": {
    "name": "27003@szmaslic07",
    "total": 2,
    "used": 1,
    "used_info": [
      {
        "user": "zhiyi.li",
        "host": "szl3bc12806",
        "lic": "szmaslic07",
        "login": "2.96h"
      }
    ]
  },
  "27003@szmaslic08": {
    "name": "27003@szmaslic08",
    "total": 2,
    "used": 2,
    "used_info": [
      {
        "user": "soo.liu",
        "host": "szl3bc12809",
        "lic": "szmaslic08",
        "login": "6.55h"
      },
      {
        "user": "haichao.ou",
        "host": "szl3bc12806",
        "lic": "szmaslic08",
        "login": "5.93h"
      }
    ]
  },
  "27003@szmaslic09": {
    "name": "27003@szmaslic09",
    "total": 2,
    "used": 2,
    "used_info": [
      {
        "user": "louie.liang",
        "host": "szl3bc12810",
        "lic": "szmaslic09",
        "login": "8.31h"
      },
      {
        "user": "zabbix",
        "host": "szl3bc06409",
        "lic": "szmaslic09",
        "login": "0.90h"
      }
    ]
  },
  "27003@szmaslic10": {
    "name": "27003@szmaslic10",
    "total": 2,
    "used": 2,
    "used_info": [
      {
        "user": "harvey.li",
        "host": "szl3bc12810",
        "lic": "szmaslic10",
        "login": "57.38h"
      },
      {
        "user": "kw.hu",
        "host": "szl3bc12809",
        "lic": "szmaslic10",
        "login": "1.41h"
      }
    ]
  }
}

def _read_sample_file(file_name:str='lic_info.json'):
    with open(file_name, 'r') as f:
        return json.load(f)

def _write_sample_file(lic_use_info, file_name:str='lic_info.json'):
    with open(file_name, 'w') as f:
        json.dump(lic_use_info, f, indent=4)

def mock_ipaddress(domain):
    id = int(domain[-2:])
    if id > 10:
        return None
    return f"192.168.1.{id}"

def mock_lmutil(cmd):
    lic_name = cmd.split(" ")[-1]
    lic_use_info = _read_sample_file()
    info = lic_use_info.get(lic_name, None)
    if info is None:
        return ''
    used_template = "    {user} {host} /dev/tty (v23) ({lic}/27003 337), start {start_time}\n"
    template = """
Users of VCAST_C_ENT_0800:  (Total of {total} licenses issued;  Total of {used} licenses in use)

"VCAST_C_ENT_0800" v23, vendor: vector, expiry: permanent(no expiration date)
vendor_string: CUST:64925:
floating license

{used_info}

Users of CCAST_0801:  (Total of 2 licenses issued;  Total of 0 licenses in use)
"""
    used_info = ''
    for item in info.get("used_info", []):
        start_time = time.time() - float(item.get("login")[:-1]) * 3600
        start_time = datetime.fromtimestamp(start_time)
        start_time = start_time.strftime("%a %m/%d %H:%M")
        used_info += used_template.format(user=item.get("user"), host=item.get("host"), lic=item.get("lic"), start_time=start_time)
    ret = template.format(total=info.get("total"), used=info.get("used"), used_info=used_info)
    return ret


def mock_license_add_user(lic, user, host):
    key = lic
    lic_use_info = _read_sample_file()
    temp = lic_use_info.get(key, None)
    used_info = {
        "user": user,
        "host": host,
        "lic": lic,
        "login": f"{random.randint(1, 1000)/ 100.0:.2f}h"
    }
    if temp is None:
        lic_use_info[key] = {
            "name": key,
            "total": 2,
            "used": 0,
            "used_info": [used_info]
        }
    else:
        lic_use_info[key]["used"] += 1
        lic_use_info[key]["used_info"].append(used_info)
    _write_sample_file(lic_use_info)

def mock_license_remove_user(user, host):
    lic_use_info = _read_sample_file()
    for _, info in lic_use_info.items():
        for item in info.get("used_info", []):
            if item.get("user") == user and item.get("host") == host:
                info["used"] -= 1
                info["used_info"].remove(item)
    _write_sample_file(lic_use_info)


if __name__ == "__main__":
    _write_sample_file(MOCK_LIC_USE_INFO)