#!/usr/bin/env python3
"""
Bridge CLI: Front-Door ↔ muse.ai metadata bridge

Manages mappings between front-door channels and muse.ai side chats.
Storage: ~/Projects/NetVM/bridge/mappings.json (operator-managed via SSH)

Usage:
  bridge.py list --channel #ops
  bridge.py add --agent 646 --chat <id> --channel #ops --purpose "incident-123"
  bridge.py remove <bridge_id>
"""
import json
import argparse
from pathlib import Path
from datetime import datetime, timezone

BRIDGE_DIR = Path.home() / "Projects" / "NetVM" / "bridge"
MAPPINGS_FILE = BRIDGE_DIR / "mappings.json"

def load_mappings():
    if not MAPPINGS_FILE.exists():
        return []
    with open(MAPPINGS_FILE) as f:
        return json.load(f)

def save_mappings(mappings):
    BRIDGE_DIR.mkdir(parents=True, exist_ok=True)
    with open(MAPPINGS_FILE, 'w') as f:
        json.dump(mappings, f, indent=2)

def cmd_list(args):
    mappings = load_mappings()
    if args.channel:
        mappings = [m for m in mappings if m['frontdoor_channel'] == args.channel]
    if not mappings:
        print("No mappings found.")
        return
    for m in mappings:
        print(f"{m['bridge_id']}: {m['agent']}/{m['muse_side_chat_id'][:8]} -> {m['frontdoor_channel']} ({m['purpose']}) [{m['status']}]")

def cmd_add(args):
    mappings = load_mappings()
    bridge_id = f"br-{datetime.now(timezone.utc).strftime('%Y%m%d%H%M%S')}"
    mapping = {
        "bridge_id": bridge_id,
        "frontdoor_channel": args.channel,
        "muse_side_chat_id": args.chat,
        "agent": args.agent,
        "linked_at": datetime.now(timezone.utc).isoformat(),
        "linked_by": args.by or "operator",
        "purpose": args.purpose,
        "status": "active"
    }
    mappings.append(mapping)
    save_mappings(mappings)
    print(f"Added {bridge_id}")

def cmd_remove(args):
    mappings = load_mappings()
    mappings = [m for m in mappings if m['bridge_id'] != args.bridge_id]
    save_mappings(mappings)
    print(f"Removed {args.bridge_id}")

def main():
    p = argparse.ArgumentParser(description="Bridge: front-door to muse.ai")
    sub = p.add_subparsers(dest='cmd', required=True)
    
    p_list = sub.add_parser('list', help='List mappings')
    p_list.add_argument('--channel', help='Filter by front-door channel')
    p_list.set_defaults(func=cmd_list)
    
    p_add = sub.add_parser('add', help='Add a mapping')
    p_add.add_argument('--agent', required=True, help='Agent (muse/pip/646)')
    p_add.add_argument('--chat', required=True, help='muse.ai side chat ID')
    p_add.add_argument('--channel', required=True, help='Front-door channel (#ops, #lobby, etc.)')
    p_add.add_argument('--purpose', required=True, help='Purpose of the side chat')
    p_add.add_argument('--by', help='Who linked (operator/agent)')
    p_add.set_defaults(func=cmd_add)
    
    p_rm = sub.add_parser('remove', help='Remove a mapping')
    p_rm.add_argument('bridge_id', help='Bridge ID to remove')
    p_rm.set_defaults(func=cmd_remove)
    
    args = p.parse_args()
    args.func(args)

if __name__ == '__main__':
    main()