#!/usr/bin/env python3

"""
Uses the agent service to answer a question
"""

import argparse
import os
import textwrap
import uuid
import asyncio
import json
from websockets.asyncio.client import connect

default_url = os.getenv("TRUSTGRAPH_URL", 'ws://localhost:8088/')
default_user = 'trustgraph'
default_collection = 'default'

def wrap(text, width=75):
    if text is None: text = "n/a"
    out = textwrap.wrap(
        text, width=width
    )
    return "\n".join(out)

def output(text, prefix="> ", width=78):
    out = textwrap.indent(
        text, prefix=prefix
    )
    print(out)

async def question(
        url, question, flow_id, user, collection,
        plan=None, state=None, verbose=False
):

    if not url.endswith("/"):
        url += "/"

    url = url + "api/v1/socket"

    if verbose:
        output(wrap(question), "\U00002753 ")
        print()

    def think(x):
        if verbose:
            output(wrap(x), "\U0001f914 ")
            print()

    def observe(x):
        if verbose:
            output(wrap(x), "\U0001f4a1 ")
            print()

    mid = str(uuid.uuid4())

    async with connect(url) as ws:

        req = json.dumps({
            "id": mid,
            "service": "agent",
            "flow": flow_id,
            "request": {
                "question": question,
            }
            
        })

        await ws.send(req)

        while True:

            msg = await ws.recv()

            obj = json.loads(msg)

            if "error" in obj:
                raise RuntimeError(obj["error"])

            if obj["id"] != mid:
                print("Ignore message")
                continue

            if "thought" in obj["response"]:
                think(obj["response"]["thought"])

            if "observation" in obj["response"]:
                observe(obj["response"]["observation"])

            if "answer" in obj["response"]:
                print(obj["response"]["answer"])

            if obj["complete"]: break

        await ws.close()

def main():

    parser = argparse.ArgumentParser(
        prog='tg-invoke-agent',
        description=__doc__,
    )

    parser.add_argument(
        '-u', '--url',
        default=default_url,
        help=f'API URL (default: {default_url})',
    )

    parser.add_argument(
        '-f', '--flow-id',
        default="0000",
        help=f'Flow ID (default: 0000)'
    )

    parser.add_argument(
        '-q', '--question',
        required=True,
        help=f'Question to answer',
    )

    parser.add_argument(
        '-U', '--user',
        default=default_user,
        help=f'User ID (default: {default_user})'
    )

    parser.add_argument(
        '-C', '--collection',
        default=default_collection,
        help=f'Collection ID (default: {default_collection})'
    )

    parser.add_argument(
        '-l', '--plan',
        help=f'Agent plan (default: unspecified)'
    )

    parser.add_argument(
        '-s', '--state',
        help=f'Agent initial state (default: unspecified)'
    )

    parser.add_argument(
        '-v', '--verbose',
        action="store_true",
        help=f'Output thinking/observations'
    )

    args = parser.parse_args()

    try:

        asyncio.run(
            question(
                url = args.url,
                flow_id = args.flow_id,
                question = args.question,
                user = args.user,
                collection = args.collection,
                plan = args.plan,
                state = args.state,
                verbose = args.verbose,
            )
        )

    except Exception as e:

        print("Exception:", e, flush=True)

main()