"""Konfiguration für Hermes Memory Next Level.

Lädt aus ~/.hermes/profiles/<profile>/memory/config.json
mit Fallback auf DEFAULT_CONFIG.
"""

import json
import os
from pathlib import Path
from typing import Any, Dict

DEFAULT_CONFIG: Dict[str, Any] = {
    "profile": "default",
    "tier2": {
        "enabled": True,
        "db_path": "{HERMES_HOME}/{profile}/memory/tier2.db",
        "wal_mode": True,
        "max_facts": 100_000,
        "max_entities": 10_000,
        "auto_dedupe": True,
    },
    "tier3": {
        "enabled": True,
        "backend": "chroma",
        "path": "{HERMES_HOME}/{profile}/memory/tier3",
        "embedding_model": "local",
        "embedding_dim": 384,
        "chunk_size": 512,
        "chunk_overlap": 64,
        "min_score": 0.7,
    },
    "graph": {
        "enabled": True,
        "path": "{HERMES_HOME}/{profile}/memory/graph",
        "auto_rebuild_interval_hours": 24,
        "max_nodes": 50_000,
        "centrality_algorithm": "betweenness",
    },
    "cron": {
        "consolidate_schedule": "0 3 * * *",
        "embed_schedule": "*/5 * * * *",
        "graph_rebuild_schedule": "0 4 * * 0",
        "prune_schedule": "0 2 1 * *",
    },
    "limits": {
        "fact_ttl_days": 365,
        "session_index_max_age_days": 90,
        "max_embedding_queue": 1000,
    },
}


def _resolve_path(template: str, profile: str) -> Path:
    """Ersetzt {HERMES_HOME} und {profile} im Pfad-Template."""
    hermes_home = Path(os.environ.get("HERMES_HOME", Path.home() / ".hermes"))
    raw = template.replace("{HERMES_HOME}", str(hermes_home)).replace("{profile}", profile)
    return Path(raw)


def load_config(profile: str = "default") -> Dict[str, Any]:
    """Lade Konfiguration mit Profil-Auflösung."""
    config_path = _resolve_path("{HERMES_HOME}/profiles/{profile}/memory/config.json", profile)
    config = DEFAULT_CONFIG.copy()
    if config_path.exists():
        with open(config_path, "r", encoding="utf-8") as f:
            user_config = json.load(f)
        config.update(user_config)
    config["profile"] = profile
    return config