# __main__.py — CLI bridge for lib_py.agents facts and resolution (N4)

import sys, json
from lib_py.agents.registry import get_adapter, own_key, agent_of_row

def main():
    if len(sys.argv) < 2:
        print("Usage: python -m lib_py.agents <facts|resolve> [args...]", file=sys.stderr)
        sys.exit(1)

    cmd = sys.argv[1]
    if cmd == 'facts':
        agent_name = sys.argv[2] if len(sys.argv) > 2 else ''
        adapter = get_adapter(agent_name)
        if not adapter:
            print(f"ERROR: Unknown agent {agent_name!r}", file=sys.stderr)
            sys.exit(1)
        # Emit shell-eval friendly facts
        print(f"AGENT_NAME={adapter.name}")
        print(f"OWN_KEY={adapter.own_key}")
        print(f"INPUT_PROMPT={adapter.input_prompt or ''}")
        print(f"INPUT_PLACEHOLDER={adapter.input_placeholder or ''}")
        print(f"INPUT_RULE_PATTERN={adapter.input_rule_pattern or ''}")

    elif cmd == 'resolve':
        name = sys.argv[2] if len(sys.argv) > 2 else ''
        resolved = agent_of_row({}, session_name=name)
        if resolved:
            print(resolved)
            sys.exit(0)
        sys.exit(1)

    elif cmd == 'input-region':
        agent_name = sys.argv[2] if len(sys.argv) > 2 else ''
        pane_text = sys.stdin.read()
        from lib_py.agents.input_region import extract_input_region
        try:
            region = extract_input_region(pane_text, agent_name)
            print(region)
            sys.exit(0)
        except Exception as ex:
            print(f"ERROR: {ex}", file=sys.stderr)
            sys.exit(5)

    else:
        print(f"ERROR: Unknown CLI command {cmd!r}", file=sys.stderr)
        sys.exit(1)

if __name__ == '__main__':
    main()