#!/usr/bin/env python3

"""
Uses the GraphRAG service to answer a query
"""

import argparse
import os
import textwrap

from trustgraph.clients.agent_client import AgentClient

default_pulsar_host = os.getenv("PULSAR_HOST", 'pulsar://localhost:6650')
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)

def query(
        pulsar_host, query, user, collection,
        plan=None, state=None, verbose=False
):

    am = AgentClient(pulsar_host=pulsar_host)

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

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

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

    resp = am.request(
        question=query, think=think, observe=observe,
    )

    print(resp)

def main():

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

    parser.add_argument(
        '-p', '--pulsar-host',
        default=default_pulsar_host,
        help=f'Pulsar host (default: {default_pulsar_host})',
    )

    parser.add_argument(
        '-q', '--query',
        required=True,
        help=f'Query to execute',
    )

    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:

        query(
            pulsar_host=args.pulsar_host,
            query=args.query,
            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()