#!/usr/bin/env python3
# args_json: {"type":"object","properties":{"role":{"type":"string","description":"Who this agent is and what it does"},"name":{"type":"string","description":"Config name (default: jit-<hex>)"},"roster":{"type":"string","description":"Name/task mapping of peers"},"shared_task":{"type":"string","description":"Tracking entry or issue ID"},"protocol":{"type":"string","description":"Coordination mechanics"},"constraints":{"type":"array","items":{"type":"string"},"description":"Array of constraint strings"},"prompt":{"type":"string","description":"Legacy: complete identity as single string"}}}
# ollie:prompt
# ## subagent_generate
#
# Generate a JIT subagent config. No args prints the JSON template.
# With JSON input, creates the config and prints the agent name.
#
# ```
# subagent_generate(role="backend dev")
# subagent_generate()
# ```
# ollie:end

import json
import os
import secrets
import sys

sys.path.insert(0, os.path.dirname(os.path.abspath(__file__)))
from _lib.args import parse_args

AGENTS_DIR = os.path.expanduser("~/.config/ollie/agents")
BASE_CONFIG = os.path.join(AGENTS_DIR, "default.json")

TEMPLATE = {
    "name": "",
    "role": "",
    "roster": "",
    "shared_task": "",
    "protocol": "",
    "constraints": [],
    "prompt": "",
}


def die(msg):
    print(f"error: {msg}", file=sys.stderr)
    sys.exit(1)


def main():
    args = parse_args()
    data = args.raw()

    # No meaningful input: print template.
    if not any(v for v in data.values() if v):
        json.dump(TEMPLATE, sys.stdout, indent=2)
        print()
        return

    name = args.get("name") or f"jit-{secrets.token_hex(8)}"
    role = args.get("role", "")
    roster = args.get("roster", "")
    shared_task = args.get("shared_task", "")
    protocol = args.get("protocol", "")
    constraints = args.get_list("constraints")
    legacy = args.get("prompt", "")

    if not role and not legacy:
        die("role or prompt required")

    # Build identity text.
    if role:
        parts = ["## Role", role]
        if roster:
            parts += ["## Roster", roster]
        if shared_task:
            parts += ["## Shared Task", shared_task]
        if protocol:
            parts += ["## Coordination Protocol", protocol]
        if constraints:
            parts += ["## Constraints", "\n".join(f"- {c}" for c in constraints)]
        identity = "\n\n".join(parts)
    else:
        identity = legacy

    # Load base config.
    try:
        with open(BASE_CONFIG) as f:
            cfg = json.load(f)
    except (OSError, json.JSONDecodeError) as e:
        die(f"failed to read base config: {e}")

    cfg["prompt"] = [f"echo {json.dumps(identity)}"]

    # Write JIT config.
    out_path = os.path.join(AGENTS_DIR, f"{name}.json")
    try:
        with open(out_path, "w") as f:
            json.dump(cfg, f, indent=2)
    except OSError as e:
        die(f"failed to write config: {e}")

    print(name)


if __name__ == "__main__":
    main()