import json
import requests
from dotenv import dotenv_values
from datetime import datetime

config = dotenv_values(".env")

WEBHOOK_URL = config["url"]
HOSTNAME = config["hostname"]

STATUS_FILE = "previous_status.json" # could get it from the .env, but it's not secret information so :shrug:

with open(STATUS_FILE, "r") as file:
    previous_status = json.load(file)

try:
    response = requests.get(
        f"https://api.mcsrvstat.us/3/{HOSTNAME}",
        timeout=10
    )
    response.raise_for_status()
    server_status = response.json()
except requests.RequestException as e:
    print(f"Failed to get server status: {e}")
    exit(1)

previous_players_data = previous_status.get("players", {})
current_players_data = server_status.get("players", {})

previous_online = previous_players_data.get("online", 0)
current_online = current_players_data.get("online", 0)

previous_max = previous_players_data.get("max", 0)
current_max = current_players_data.get("max", 0)

previous_player_list = {
    player["name"]
    for player in previous_players_data.get("list", [])
}

current_player_list = {
    player["name"]
    for player in current_players_data.get("list", [])
}

if (
    previous_online == current_online
    and previous_player_list == current_player_list
):
    print("nothing changed.")
    exit()


if current_online > previous_online:
    pc_diff_sign = "+"
elif current_online < previous_online:
    pc_diff_sign = "-"
else:
    pc_diff_sign = " "


if previous_online != current_online:
    pc_diff_previously = f"(previously {previous_online})"
else:
    pc_diff_previously = ""


playercount_diff_formatted = (
    f"{pc_diff_sign} {current_online}/{current_max} "
    f"{pc_diff_previously}"
)


joined_players = current_player_list - previous_player_list
left_players = previous_player_list - current_player_list

player_diff = []

for player in sorted(current_player_list):
    if player in joined_players:
        player_diff.append(f"+ {player}")
    else:
        player_diff.append(f"  {player}")

for player in sorted(left_players):
    player_diff.append(f"- {player}")

player_diff_formatted = "\n".join(player_diff) or "  no one is here."


payload = {
    "content": f"""
# status changed on {HOSTNAME}

```diff
{playercount_diff_formatted}
```
```diff
{player_diff_formatted}
```
-# *at {datetime.now()}*
"""
}


try:
    response = requests.post(
        WEBHOOK_URL,
        json=payload,
        timeout=10
    )
    response.raise_for_status()
except requests.RequestException as e:
    print(f"failed to send webhook: {e}")
    exit(1)


print("success")


with open(STATUS_FILE, "w") as file:
    json.dump(server_status, file, indent=2)