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from __future__ import annotations

import argparse
import json
import logging
import sys
from pathlib import Path
from typing import Any

from .feedback import Critique, FeedbackLoopManager
from .inference_cloud import predict_cloud
from .optimizer import OptimizerConfig, FormulationOptimizer, CompositionTarget

logger = logging.getLogger("pino.cli")


def _load_formula(path: str) -> dict[str, Any]:
    with Path(path).open("r", encoding="utf-8") as f:
        return json.load(f)


def _predict(args: argparse.Namespace) -> int:
    try:
        formula = _load_formula(args.file)
    except Exception as e:
        logger.error("Failed to load formula file: %s", e)
        return 2

    try:
        result = predict_cloud(formula, token=args.token)
    except Exception as e:
        logger.error("Prediction failed: %s", e)
        return 2

    if args.json_mode:
        print(json.dumps(result, separators=(",", ":"), ensure_ascii=False))
    else:
        print("Predicted note pyramid and psychometrics:")
        print(json.dumps(result, indent=2, ensure_ascii=False))
    return 0


def _feedback(args: argparse.Namespace) -> int:
    try:
        critique = Critique(
            formula_id=args.formula_id,
            correct_gender=args.correct_gender,
            correct_notes=json.loads(args.correct_notes) if args.correct_notes else {},
            notes=args.notes or "",
        )
        manager = FeedbackLoopManager()
        manager.append(critique)
    except Exception as e:
        logger.error("Failed to log feedback: %s", e)
        return 2

    if args.json_mode:
        print(json.dumps({"status": "logged", "formula_id": args.formula_id}, separators=(",", ":")))
    else:
        print(f"Feedback logged for {args.formula_id}")
    return 0


def _sync_flywheel(args: argparse.Namespace) -> int:
    try:
        manager = FeedbackLoopManager()
        result = manager.sync_flywheel(job_config_path=args.job_config)
    except Exception as e:
        logger.error("Sync flywheel failed: %s", e)
        return 2

    if args.json_mode:
        print(json.dumps(result, separators=(",", ":"), ensure_ascii=False))
    else:
        print(json.dumps(result, indent=2, ensure_ascii=False))
    return 0 if result.get("action") != "none" or args.allow_empty else 0


def _compose(args: argparse.Namespace) -> int:
    """Run the generative composer (CMA-ES) to evolve a formula against a target."""
    try:
        target = CompositionTarget.from_json(args.target_json)
    except Exception as e:
        logger.error("Failed to load target brief: %s", e)
        return 2

    config = OptimizerConfig(
        max_iterations=args.max_iterations,
        allow_synthetic=args.allow_synthetic,
        seed=args.seed,
        token=args.token,
        verbose=1 if args.json_mode else 1,
    )

    def progress(iteration: int, fitness: float, best: Any) -> None:
        # Real-time progress to stderr, never to stdout when --json is set.
        msg = f"[{iteration}/{args.max_iterations}] best fitness (MSE) = {fitness:.6f}"
        if args.json_mode:
            print(msg, file=sys.stderr)
        else:
            print(msg, file=sys.stderr)

    seed_recipe = None
    if args.seed_id:
        from .ingest_formulas import load_literature_manifest, normalize_and_unpack_recipe_from_dict
        try:
            recipes = load_literature_manifest(args.literature_formulas)
            recipe = next((r for r in recipes if r.get("formula_id") == args.seed_id), None)
            if recipe is None:
                logger.error("Seed recipe %s not found in %s", args.seed_id, args.literature_formulas)
                return 2
            seed_recipe = normalize_and_unpack_recipe_from_dict(recipe)
            logger.info("Loaded literature seed recipe %s with %d components", args.seed_id, len(seed_recipe["components"]))
        except Exception as e:
            logger.error("Failed to load seed recipe: %s", e)
            return 2

    try:
        optimizer = FormulationOptimizer(config)
        best = optimizer.optimize(
            target,
            palette_size=args.palette_size,
            progress_callback=progress,
            seed_recipe=seed_recipe,
        )
    except Exception as e:
        logger.error("Composition failed: %s", e)
        return 2

    output = {
        "target": target.name,
        "formula": best.to_formula_dict(),
        "status": best.status,
        "fitness": best.fitness,
        "ifra_passed": best.ifra_report.get("passed", False),
        "message": best.message,
    }

    if args.json_mode:
        print(json.dumps(output, separators=(",", ":"), ensure_ascii=False))
    else:
        print(json.dumps(output, indent=2, ensure_ascii=False))
    return 0


def main(argv: list[str] | None = None) -> int:
    parser = argparse.ArgumentParser(prog="pino-critic")
    parser.add_argument("--token", default=None, help="Hugging Face access token")
    subparsers = parser.add_subparsers(dest="command", required=True)

    predict_parser = subparsers.add_parser("predict", help="Run cloud inference on a formula")
    predict_parser.add_argument("--file", required=True, help="Path to formula JSON file")
    predict_parser.add_argument("--json", action="store_true", dest="json_mode", help="Emit raw parseable JSON only")
    predict_parser.set_defaults(func=_predict)

    feedback_parser = subparsers.add_parser("feedback", help="Log a correction for a recipe")
    feedback_parser.add_argument("--formula_id", required=True)
    feedback_parser.add_argument("--correct_gender", type=float, default=None, help="-1.0 to +1.0")
    feedback_parser.add_argument("--correct_notes", default="{}", help="JSON dict of index -> value")
    feedback_parser.add_argument("--notes", default="", help="Free-form correction notes")
    feedback_parser.add_argument("--json", action="store_true", dest="json_mode", help="Emit raw parseable JSON only")
    feedback_parser.set_defaults(func=_feedback)

    sync_parser = subparsers.add_parser("sync-flywheel", help="Merge feedback, push dataset, retrain")
    sync_parser.add_argument("--job-config", default="hf_job.yaml")
    sync_parser.add_argument("--allow-empty", action="store_true", help="Return 0 even if no feedback")
    sync_parser.add_argument("--json", action="store_true", dest="json_mode", help="Emit raw parseable JSON only")
    sync_parser.set_defaults(func=_sync_flywheel)

    compose_parser = subparsers.add_parser("compose", help="Evolve a formula against a sensory target")
    compose_parser.add_argument("--target-json", required=True, help="Path to JSON brief defining desired sensory characteristics")
    compose_parser.add_argument("--max-iterations", type=int, default=500, help="Maximum generation cycles")
    compose_parser.add_argument("--palette-size", type=int, default=20, help="Number of palette ingredients")
    compose_parser.add_argument("--allow-synthetic", action="store_true", default=True, help="Allow non-renewable ingredients")
    compose_parser.add_argument("--no-synthetic", action="store_false", dest="allow_synthetic", help="Restrict to renewable ingredients")
    compose_parser.add_argument("--seed", type=int, default=None, help="Random seed")
    compose_parser.add_argument("--seed-id", default=None, help="Literature recipe ID to seed the first generation")
    compose_parser.add_argument("--literature-formulas", default="data/literature_formulas.json", help="Path to literature formula manifest")
    compose_parser.add_argument("--json", action="store_true", dest="json_mode", help="Emit raw parseable JSON only")
    compose_parser.set_defaults(func=_compose)

    args = parser.parse_args(argv)
    logging.basicConfig(
        level=logging.INFO,
        format="%(asctime)s %(levelname)s %(name)s: %(message)s",
    )

    try:
        return args.func(args)
    except Exception as e:
        logger.exception("Unhandled runtime exception")
        return 2


if __name__ == "__main__":
    sys.exit(main())