from __future__ import annotations

import json
import os
import subprocess
from typing import Any, Dict, List

import requests

from .registry import ToolRegistry


def t_cql_exec(args: Dict[str, Any]) -> str:
    """Execute CQL via cqlsh.
    Args: hosts(list or csv), query(str), keyspace(optional), username/password from env if not provided.
    Requires: cqlsh installed and reachable.
    """
    hosts = args.get("hosts")
    if isinstance(hosts, str):
        hosts = [h.strip() for h in hosts.split(",") if h.strip()]
    if not hosts:
        return json.dumps({"error": "hosts required"})
    query = args.get("query")
    if not query:
        return json.dumps({"error": "query required"})
    keyspace = args.get("keyspace")
    user = args.get("username") or os.getenv("SCYLLA_USER")
    pw = args.get("password") or os.getenv("SCYLLA_PASS")
    host = hosts[0]
    cmd: List[str] = ["cqlsh", host, "9042"]
    if user and pw:
        cmd += ["-u", user, "-p", pw]
    if keyspace:
        cmd += ["-k", keyspace]
    try:
        proc = subprocess.run(cmd, input=query, text=True, capture_output=True, timeout=60)
        return json.dumps({"returncode": proc.returncode, "stdout": proc.stdout[-4000:], "stderr": proc.stderr[-4000:]})
    except Exception as e:
        return json.dumps({"error": str(e)})


def t_gremlin_exec(args: Dict[str, Any]) -> str:
    """Execute a Gremlin query against Gremlin Server (ws/json HTTP endpoint).
    Args: url (ws:// or http://), Gremlin groovy string 'query'.
    """
    url = args.get("url") or os.getenv("GREMLIN_URL", "http://localhost:17002")
    query = args.get("query")
    if not query:
        return json.dumps({"error": "query required"})
    # Try HTTP first (JanusGraph can enable REST). If fails, return error; clients can adapt.
    try:
        r = requests.post(f"{url}/gremlin", json={"gremlin": query}, timeout=15)
        return json.dumps({"status": r.status_code, "body": r.text[:50000]})
    except Exception as e:
        return json.dumps({"error": str(e)})


def t_qdrant_upsert(args: Dict[str, Any]) -> str:
    url = args.get("url") or os.getenv("QDRANT_URL", "http://localhost:17000")
    collection = args.get("collection") or os.getenv("QDRANT_COLLECTION", "elizabeth_embeddings")
    points = args.get("points") or []
    if not points:
        return json.dumps({"error": "points required"})
    payload = {"points": points}
    try:
        r = requests.put(f"{url}/collections/{collection}/points", json=payload, timeout=30)
        return json.dumps({"status": r.status_code, "body": r.text[:50000]})
    except Exception as e:
        return json.dumps({"error": str(e)})


def t_qdrant_query(args: Dict[str, Any]) -> str:
    url = args.get("url") or os.getenv("QDRANT_URL", "http://localhost:17000")
    collection = args.get("collection") or os.getenv("QDRANT_COLLECTION", "elizabeth_embeddings")
    vector = args.get("vector")
    top = int(args.get("top", 5))
    filter_ = args.get("filter")
    if not isinstance(vector, list):
        return json.dumps({"error": "vector required (list[float])"})
    payload = {"vector": vector, "top": top}
    if filter_:
        payload["filter"] = filter_
    try:
        r = requests.post(f"{url}/collections/{collection}/points/search", json=payload, timeout=30)
        return json.dumps({"status": r.status_code, "body": r.text[:50000]})
    except Exception as e:
        return json.dumps({"error": str(e)})


def t_clickhouse_query(args: Dict[str, Any]) -> str:
    url = args.get("url") or os.getenv("CLICKHOUSE_URL", "http://localhost:8123")
    query = args.get("query")
    if not query:
        return json.dumps({"error": "query required"})
    try:
        r = requests.post(url, data=query, timeout=30)
        return json.dumps({"status": r.status_code, "body": r.text[:50000]})
    except Exception as e:
        return json.dumps({"error": str(e)})


def register_tools(reg: ToolRegistry) -> None:
    reg.register(
        name="cql_exec",
        description="Execute Scylla/Cassandra CQL via cqlsh.",
        parameters={"type": "object", "properties": {"hosts": {"oneOf": [{"type": "array", "items": {"type": "string"}}, {"type": "string"}]}, "query": {"type": "string"}, "keyspace": {"type": "string"}, "username": {"type": "string"}, "password": {"type": "string"}}, "required": ["hosts", "query"]},
        handler=t_cql_exec,
    )
    reg.register(
        name="gremlin_exec",
        description="Execute a Gremlin query against Gremlin Server (HTTP endpoint).",
        parameters={"type": "object", "properties": {"url": {"type": "string"}, "query": {"type": "string"}}, "required": ["query"]},
        handler=t_gremlin_exec,
    )
    reg.register(
        name="qdrant_upsert",
        description="Upsert points into a Qdrant collection.",
        parameters={"type": "object", "properties": {"url": {"type": "string"}, "collection": {"type": "string"}, "points": {"type": "array"}}, "required": ["points"]},
        handler=t_qdrant_upsert,
    )
    reg.register(
        name="qdrant_query",
        description="Query nearest vectors from a Qdrant collection.",
        parameters={"type": "object", "properties": {"url": {"type": "string"}, "collection": {"type": "string"}, "vector": {"type": "array"}, "top": {"type": "integer"}, "filter": {"type": "object"}}, "required": ["vector"]},
        handler=t_qdrant_query,
    )
    reg.register(
        name="clickhouse_query",
        description="Query ClickHouse over HTTP (port 8123).",
        parameters={"type": "object", "properties": {"url": {"type": "string"}, "query": {"type": "string"}}, "required": ["query"]},
        handler=t_clickhouse_query,
    )