#!/usr/bin/env python3
"""Добавляет или убирает хуки панели в ~/.claude/settings.json, не трогая остальное.

  settings_hooks.py add    <settings.json>
  settings_hooks.py remove <settings.json>
"""
import json
import os
import sys

MARK = "agents_panel_hook"
COMMAND = 'sh "$HOME/.claude/hooks/agents_panel_hook.sh"'
EVENTS = {  # событие -> matcher (None — без фильтра)
    "SessionStart": None, "SessionEnd": None, "UserPromptSubmit": None, "Stop": None,
    "Notification": None, "SubagentStart": None, "SubagentStop": None,
    "PostModelSwitch": None, "PreToolUse": "Agent|Task",
}


def ours(hook):
    return isinstance(hook, dict) and MARK in str(hook.get("command", ""))


def add(cfg):
    hooks = cfg.setdefault("hooks", {})
    added = []
    for event, matcher in EVENTS.items():
        groups = hooks.setdefault(event, [])
        if any(ours(h) for g in groups for h in (g.get("hooks") or [])):
            continue  # уже стоит — повторная установка ничего не дублирует
        group = {"hooks": [{"type": "command", "command": COMMAND}]}
        if matcher:
            group = {"matcher": matcher, **group}
        groups.append(group)
        added.append(event)
    return added


def remove(cfg):
    hooks = cfg.get("hooks") or {}
    removed = []
    for event in list(hooks):
        groups = []
        for g in hooks[event]:
            kept = [h for h in (g.get("hooks") or []) if not ours(h)]
            if len(kept) != len(g.get("hooks") or []):
                removed.append(event)
            if kept:
                groups.append({**g, "hooks": kept})
        if groups:
            hooks[event] = groups
        else:
            del hooks[event]
    if "hooks" in cfg and not cfg["hooks"]:
        del cfg["hooks"]
    return sorted(set(removed))


def main():
    action, path = sys.argv[1], os.path.expanduser(sys.argv[2])
    cfg = {}
    if os.path.exists(path):
        with open(path, encoding="utf-8") as f:
            text = f.read().strip()
        cfg = json.loads(text) if text else {}
    changed = add(cfg) if action == "add" else remove(cfg)
    if changed:
        os.makedirs(os.path.dirname(path), exist_ok=True)
        tmp = path + ".tmp"
        with open(tmp, "w", encoding="utf-8") as f:
            json.dump(cfg, f, ensure_ascii=False, indent=2)
            f.write("\n")
        os.replace(tmp, path)
    print(", ".join(changed) if changed else "—")


if __name__ == "__main__":
    main()