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#!/usr/bin/env python3
"""
admin panel for faggot-chan. runs on the box that has the files, so there's nothing on discord to reach
(not even with admin perms). the bot re-reads all of these on every message, no restart needed.

    admin.py list
    admin.py edit <blocked|prompt|settings|reactions|params>   opens it in $EDITOR (vim if unset)
    admin.py block <user id> [note]
    admin.py unblock <user id>
"""
import json
import os
import shlex
import subprocess
import sys
from pathlib import Path

SCRIPT_DIR = Path(__file__).resolve().parent
BOT_CONFIG = SCRIPT_DIR / "files" / "config"

TARGETS = {
    "blocked":   BOT_CONFIG / "blocked.txt",
    "prompt":    BOT_CONFIG / "system_prompt.txt",
    "settings":  BOT_CONFIG / "settings.json",
    "reactions": BOT_CONFIG / "reactions.json",
    "params":    SCRIPT_DIR / "config" / "params.json",  # main.py side, ollama options
}


def edit(name: str):
    path = TARGETS[name]
    path.parent.mkdir(parents=True, exist_ok=True)
    original = path.read_bytes() if path.exists() else None  # to put back if the json ends up broken and they give up
    if original is None:
        path.write_text("{}\n" if path.suffix == ".json" else "", encoding="utf-8")
    editor = shlex.split(os.environ.get("EDITOR", "vim"))
    while True:
        subprocess.call([*editor, str(path)])
        if path.suffix != ".json":
            return
        try:
            json.loads(path.read_text(encoding="utf-8"))
            return
        except json.JSONDecodeError as e:
            print(f"that's not valid json: {e}")
            if input("open it again? (y/n): ").strip().lower() in ("y", "yes"):
                continue
            if original is None:
                path.unlink()
            else:
                path.write_bytes(original)
            print("reverted")
            return


def blocked_ids(lines: list[str]) -> set[str]:
    return {l.split("#")[0].strip() for l in lines if l.split("#")[0].strip()}


def block(user_id: str, note: str = ""):
    path = TARGETS["blocked"]
    lines = path.read_text(encoding="utf-8").splitlines() if path.exists() else []
    if user_id in blocked_ids(lines):
        print(f"{user_id} is already blocked")
        return
    lines.append(f"{user_id}  # {note}" if note else user_id)
    path.parent.mkdir(parents=True, exist_ok=True)
    path.write_text("\n".join(lines) + "\n", encoding="utf-8")
    print(f"blocked {user_id}")


def unblock(user_id: str):
    path = TARGETS["blocked"]
    lines = path.read_text(encoding="utf-8").splitlines() if path.exists() else []
    kept = [l for l in lines if l.split("#")[0].strip() != user_id]
    if len(kept) == len(lines):
        print(f"{user_id} wasn't blocked")
        return
    path.write_text("\n".join(kept) + "\n", encoding="utf-8")
    print(f"unblocked {user_id}")


def usage():
    print(__doc__.strip())
    sys.exit(1)


def main():
    args = sys.argv[1:]
    if not args:
        usage()
    cmd = args[0]
    if cmd == "list":
        for name, path in TARGETS.items():
            print(f"{name:10} {path}{'' if path.exists() else '  (not made yet)'}")
    elif cmd == "edit" and len(args) == 2 and args[1] in TARGETS:
        edit(args[1])
    elif cmd == "block" and len(args) >= 2 and args[1].isdigit():
        block(args[1], " ".join(args[2:]))
    elif cmd == "unblock" and len(args) == 2 and args[1].isdigit():
        unblock(args[1])
    else:
        usage()


if __name__ == "__main__":
    main()