"""
End-to-end experiment runner across all tokenizer × domain × model × mode.

Usage:
    uv run python -m code.experiments.run_all [--tokenizers wl simhash random] [--domains blocks]

This script orchestrates:
  1. Embedding generation (if not already done) via generate_multi_embeddings
  2. Model training via train_lstm / train_xgb
  3. Inference via inference_lstm / inference_xgb
  4. Results collection and table generation
"""

import argparse
import glob
import json
import os
import subprocess
import sys

from tqdm import tqdm

from code.experiments.config import (
    DOMAINS,
    MODEL_CONFIGS,
    SEED,
    SPLITS_EVAL,
    TOKENIZATION_CONFIGS,
)
from code.experiments.results import ExperimentTracker

TOKENIZER_ALIASES = {
    "graphs": "wl",
}


def canonical_tokenizer_name(name: str) -> str:
    """Normalize tokenizer aliases to canonical experiment config keys."""
    return TOKENIZER_ALIASES.get(name, name)


def get_tokenizer_config(tokenizer: str) -> tuple[str, dict]:
    """Resolve tokenizer alias and return canonical name + config."""
    canonical = canonical_tokenizer_name(tokenizer)
    if canonical not in TOKENIZATION_CONFIGS:
        valid = sorted(set(TOKENIZATION_CONFIGS.keys()) | set(TOKENIZER_ALIASES.keys()))
        raise ValueError(
            f"Unknown tokenizer '{tokenizer}'. "
            f"Valid tokenizers: {', '.join(valid)}"
        )
    return canonical, TOKENIZATION_CONFIGS[canonical]


def run_command(cmd: list[str], desc: str = "") -> int:
    """Run a subprocess and return exit code."""
    print(f"\n>>> {desc}")
    print(f"    {' '.join(cmd)}")
    result = subprocess.run(cmd, capture_output=False)
    if result.returncode != 0:
        print(f"    [WARN] Command returned non-zero exit code: {result.returncode}")
    return result.returncode


def build_wandb_cli_args(
    enabled: bool,
    project: str,
    entity: str | None,
    group: str | None,
    mode: str,
    run_name: str,
    tags: list[str],
) -> list[str]:
    """Build reusable W&B CLI arguments."""
    if not enabled:
        return []

    args = [
        "--wandb",
        "--wandb_project",
        project,
        "--wandb_mode",
        mode,
        "--wandb_run_name",
        run_name,
    ]
    if entity:
        args.extend(["--wandb_entity", entity])
    if group:
        args.extend(["--wandb_group", group])
    if tags:
        args.extend(["--wandb_tags", ",".join(tags)])
    return args


def generate_embeddings(tokenizer: str, domain: str, data_dir: str = "data") -> None:
    """Generate embeddings for a tokenizer-domain pair if not already done."""
    canonical_tokenizer, tok_config = get_tokenizer_config(tokenizer)
    enc_dir = tok_config["encoding_dir"]
    output_dir = os.path.join(data_dir, "encodings", enc_dir)
    check_dir = os.path.join(output_dir, domain, "train")

    # Skip if already generated
    if os.path.exists(check_dir) and len(os.listdir(check_dir)) > 0:
        print(f"  [Skip] Embeddings already exist: {check_dir}")
        return

    cmd = [
        sys.executable,
        "-m",
        "code.encoding_generation.generate_multi_embeddings",
        "--tokenizer",
        canonical_tokenizer,
        "--domain",
        domain,
        "--data_dir",
        data_dir,
        "--output_dir",
        output_dir,
        "--model_dir",
        os.path.join(data_dir, "encodings", "models"),
    ]

    # Add tokenizer-specific params
    params = tok_config["params"]
    for key, value in params.items():
        cmd.extend([f"--{key}", str(value)])

    run_command(cmd, f"Generating {tokenizer} embeddings for {domain}")


def train_model(
    model_type: str,
    mode: str,
    tokenizer: str,
    domain: str,
    device: str = "auto",
    num_workers: int = 8,
    lstm_amp: bool = True,
    fast: bool = False,
    xgb_n_jobs: int = 8,
    wandb: bool = False,
    wandb_project: str = "state-centric-plan",
    wandb_entity: str | None = None,
    wandb_group: str | None = None,
    wandb_mode: str = "online",
    wandb_tags: str = "",
    data_dir: str = "data",
    checkpoint_dir: str = "checkpoints",
) -> str:
    """Train a model and return the save directory."""
    _, tok_config = get_tokenizer_config(tokenizer)
    enc_dir = tok_config["encoding_dir"]
    data_path = os.path.join(data_dir, "encodings", enc_dir)
    save_dir = os.path.join(checkpoint_dir, enc_dir, f"{model_type}_{mode}")

    model_config = MODEL_CONFIGS[model_type][f"{mode}_mode"]
    run_tags = [tokenizer, domain, model_type, mode, "train"]
    extra_tags = [t.strip() for t in wandb_tags.split(",") if t.strip()]
    run_tags.extend(extra_tags)
    run_name = f"{tokenizer}-{domain}-{model_type}-{mode}-train"

    if model_type == "lstm":
        cmd = [
            sys.executable,
            "-m",
            "code.modeling.train_lstm",
            "--domain", domain,
            "--data_dir", data_path,
            "--save_dir", save_dir,
            "--epochs", str(model_config["epochs"]),
            "--batch_size", str(model_config["batch_size"]),
            "--hidden_dim", str(model_config["hidden_dim"]),
            "--lr", str(model_config["lr"]),
            "--device", device,
            "--num_workers", str(num_workers),
            "--seed", str(SEED),
        ]
        if mode == "delta":
            cmd.append("--delta")
        if model_config.get("no_projection"):
            cmd.append("--no_projection")
        if lstm_amp:
            cmd.append("--amp")
        else:
            cmd.append("--no_amp")
        if fast:
            cmd.append("--fast")
        cmd.extend(
            build_wandb_cli_args(
                enabled=wandb,
                project=wandb_project,
                entity=wandb_entity,
                group=wandb_group,
                mode=wandb_mode,
                run_name=run_name,
                tags=run_tags,
            )
        )

    elif model_type == "xgboost":
        xgb_device = device if device in {"auto", "cuda", "cpu"} else "auto"
        cmd = [
            sys.executable,
            "-m",
            "code.modeling.train_xgb",
            "--domain", domain,
            "--data_dir", data_path,
            "--save_dir", save_dir,
            "--encoding", enc_dir,
            "--n_estimators", str(model_config["n_estimators"]),
            "--max_depth", str(model_config["max_depth"]),
            "--lr", str(model_config["lr"]),
            "--early_stopping", str(model_config["early_stopping"]),
            "--device", xgb_device,
            "--n_jobs", str(xgb_n_jobs),
            "--seed", str(SEED),
        ]
        if mode == "delta":
            cmd.append("--delta")
        cmd.extend(
            build_wandb_cli_args(
                enabled=wandb,
                project=wandb_project,
                entity=wandb_entity,
                group=wandb_group,
                mode=wandb_mode,
                run_name=run_name,
                tags=run_tags,
            )
        )

    run_command(cmd, f"Training {model_type}/{mode} on {tokenizer}/{domain}")
    return save_dir


def run_inference(
    model_type: str,
    mode: str,
    tokenizer: str,
    domain: str,
    device: str = "auto",
    lstm_amp: bool = True,
    fast: bool = False,
    xgb_n_jobs: int = 8,
    wandb: bool = False,
    wandb_project: str = "state-centric-plan",
    wandb_entity: str | None = None,
    wandb_group: str | None = None,
    wandb_mode: str = "online",
    wandb_tags: str = "",
    data_dir: str = "data",
    checkpoint_dir: str = "checkpoints",
    results_dir: str = "results",
    val_path: str | None = None,
    execute: bool = True,
) -> dict:
    """Run inference for a trained model and return split metrics."""
    _, tok_config = get_tokenizer_config(tokenizer)
    enc_dir = tok_config["encoding_dir"]
    model_dir = os.path.join(checkpoint_dir, enc_dir, f"{model_type}_{mode}")
    output_dir = os.path.join(results_dir, enc_dir, f"{model_type}_{mode}")
    os.makedirs(output_dir, exist_ok=True)
    model_config = MODEL_CONFIGS[model_type][f"{mode}_mode"]
    run_tags = [tokenizer, domain, model_type, mode, "inference"]
    extra_tags = [t.strip() for t in wandb_tags.split(",") if t.strip()]
    run_tags.extend(extra_tags)
    run_name = f"{tokenizer}-{domain}-{model_type}-{mode}-inference"

    if model_type == "lstm":
        checkpoint_path = os.path.join(model_dir, f"{domain}_lstm_best.pt")
        cmd = [
            sys.executable,
            "-m",
            "code.modeling.inference_lstm",
            "--domain", domain,
            "--checkpoint", checkpoint_path,
            "--data_dir", data_dir,
            "--results_dir", output_dir,
            "--encoding", enc_dir,
            "--pddl_dir", os.path.join(data_dir, "pddl"),
            "--device", device,
            "--hidden_dim", str(model_config["hidden_dim"]),
            "--tag", mode,
            "--seed", str(SEED),
        ]
        if mode == "delta":
            cmd.append("--delta")
        if model_config.get("no_projection"):
            cmd.append("--no_projection")
        if lstm_amp:
            cmd.append("--amp")
        else:
            cmd.append("--no_amp")
        if fast:
            cmd.append("--fast")
        if val_path:
            cmd.extend(["--val_path", val_path])
        cmd.extend(
            build_wandb_cli_args(
                enabled=wandb,
                project=wandb_project,
                entity=wandb_entity,
                group=wandb_group,
                mode=wandb_mode,
                run_name=run_name,
                tags=run_tags,
            )
        )

    elif model_type == "xgboost":
        xgb_device = device if device in {"auto", "cuda", "cpu"} else "auto"
        cmd = [
            sys.executable,
            "-m",
            "code.modeling.inference_xgb",
            "--domain", domain,
            "--checkpoint_dir", model_dir,
            "--data_dir", data_dir,
            "--results_dir", output_dir,
            "--pddl_dir", os.path.join(data_dir, "pddl"),
            "--device", xgb_device,
            "--n_jobs", str(xgb_n_jobs),
            "--tag", mode,
            "--seed", str(SEED),
        ]
        if mode == "delta":
            cmd.append("--delta")
        if val_path:
            cmd.extend(["--val_path", val_path])
        cmd.extend(
            build_wandb_cli_args(
                enabled=wandb,
                project=wandb_project,
                entity=wandb_entity,
                group=wandb_group,
                mode=wandb_mode,
                run_name=run_name,
                tags=run_tags,
            )
        )

    if execute:
        run_command(cmd, f"Inference {model_type}/{mode} on {tokenizer}/{domain}")

    metrics = {}
    for split in SPLITS_EVAL:
        pattern = os.path.join(output_dir, f"{domain}_*_{split}_{mode}_results.json")
        matches = glob.glob(pattern)
        if not matches:
            # Fallback for legacy filenames without tag suffix.
            legacy_pattern = os.path.join(output_dir, f"{domain}_*_{split}_results.json")
            matches = glob.glob(legacy_pattern)
        if not matches:
            continue

        result_file = max(matches, key=os.path.getmtime)
        with open(result_file, "r") as f:
            rows = json.load(f)

        total = len(rows)
        solved = sum(1 for row in rows if row.get("solved"))
        executable = sum(1 for row in rows if row.get("val_executable"))
        metrics[split] = {
            "solved_rate": (solved / total) if total else 0.0,
            "exec_rate": (executable / total) if total else 0.0,
        }

    return metrics


def main():
    parser = argparse.ArgumentParser(description="Run full experiment suite.")
    parser.add_argument(
        "--tokenizers",
        nargs="+",
        default=list(TOKENIZATION_CONFIGS.keys()),
        help="Tokenizers to evaluate",
    )
    parser.add_argument("--domains", nargs="+", default=DOMAINS)
    parser.add_argument(
        "--models",
        nargs="+",
        default=["lstm", "xgboost"],
        help="Model types",
    )
    parser.add_argument("--modes", nargs="+", default=["state", "delta"])
    parser.add_argument("--data_dir", default="data")
    parser.add_argument("--checkpoint_dir", default="checkpoints")
    parser.add_argument("--results_dir", default="results")
    parser.add_argument(
        "--device",
        choices=["auto", "cuda", "mps", "cpu"],
        default="auto",
        help="Preferred compute device policy",
    )
    parser.add_argument("--num_workers", type=int, default=8)
    parser.add_argument("--xgb_n_jobs", type=int, default=8)
    parser.add_argument(
        "--lstm_amp",
        dest="lstm_amp",
        action="store_true",
        help="Enable CUDA mixed precision for LSTM train/inference",
    )
    parser.add_argument(
        "--no_lstm_amp",
        dest="lstm_amp",
        action="store_false",
        help="Disable CUDA mixed precision for LSTM train/inference",
    )
    parser.add_argument(
        "--fast",
        action="store_true",
        help="Enable fast CUDA settings in LSTM components",
    )
    parser.add_argument(
        "--lstm_epochs",
        type=int,
        default=None,
        help="Optional override for LSTM epochs in both state and delta modes.",
    )
    parser.add_argument(
        "--val_path",
        default=os.environ.get("VAL_PATH"),
        help="Optional path to VAL binary. If unset, local defaults are auto-detected.",
    )
    parser.add_argument(
        "--skip_embedding",
        action="store_true",
        help="Skip embedding generation (assume existing)",
    )
    parser.add_argument(
        "--skip_training",
        action="store_true",
        help="Skip training (assume existing models)",
    )
    parser.add_argument(
        "--skip_inference",
        action="store_true",
        help="Skip inference (just collect results)",
    )
    parser.add_argument(
        "--wandb",
        action="store_true",
        help="Enable W&B logging for train/inference subprocesses",
    )
    parser.add_argument(
        "--wandb_project",
        default="state-centric-plan",
        help="W&B project name",
    )
    parser.add_argument(
        "--wandb_entity",
        default=None,
        help="Optional W&B entity/team",
    )
    parser.add_argument(
        "--wandb_group",
        default=None,
        help="Optional W&B run group for the full sweep",
    )
    parser.add_argument(
        "--wandb_mode",
        choices=["online", "offline", "disabled"],
        default="online",
        help="W&B mode",
    )
    parser.add_argument(
        "--wandb_tags",
        default="",
        help="Optional comma-separated additional W&B tags for all runs",
    )
    parser.set_defaults(lstm_amp=True)
    args = parser.parse_args()

    alias_notes = []
    for tok in args.tokenizers:
        canonical, _ = get_tokenizer_config(tok)
        if tok != canonical:
            alias_notes.append(f"{tok}->{canonical}")

    if not args.val_path:
        local_val_candidates = [
            os.path.join("VAL", "build", "bin", "Validate.exe"),
            os.path.join("VAL", "build", "bin", "Validate"),
            os.path.join("VAL", "bin", "Validate.exe"),
            os.path.join("VAL", "bin", "Validate"),
        ]
        for candidate in local_val_candidates:
            if os.path.exists(candidate):
                args.val_path = candidate
                break

    if not args.skip_inference:
        if args.val_path:
            print(f"Using VAL: {args.val_path}")
        else:
            print(
                "[WARN] VAL path not provided/found. Inference will run, but solved/executable "
                "validation may fail depending on environment defaults."
            )

    if args.lstm_epochs is not None:
        MODEL_CONFIGS["lstm"]["state_mode"]["epochs"] = args.lstm_epochs
        MODEL_CONFIGS["lstm"]["delta_mode"]["epochs"] = args.lstm_epochs
        print(
            f"Overriding LSTM epochs to {args.lstm_epochs} "
            f"for both state and delta modes."
        )

    tracker = ExperimentTracker(output_dir=args.results_dir)

    total = (
        len(args.tokenizers)
        * len(args.domains)
        * len(args.models)
        * len(args.modes)
    )
    print(f"Total configurations: {total}")
    print(f"Tokenizers: {args.tokenizers}")
    if alias_notes:
        print(f"Tokenizer aliases resolved: {', '.join(alias_notes)}")
    print(f"Domains: {args.domains}")
    print(f"Models: {args.models}")
    print(f"Modes: {args.modes}")
    print(
        f"Device policy: {args.device} | LSTM AMP: {args.lstm_amp} | "
        f"LSTM workers: {args.num_workers} | XGB n_jobs: {args.xgb_n_jobs}"
    )
    print(f"W&B enabled: {args.wandb} | mode: {args.wandb_mode}")
    print(f"Progress view: one bar per configuration ({total} total for this sweep).")

    done = 0
    overall_bar = tqdm(
        total=total,
        desc="Overall Configurations",
        unit="cfg",
        dynamic_ncols=True,
    )
    for tokenizer in args.tokenizers:
        for domain in args.domains:
            # Step 1: Generate embeddings
            if not args.skip_embedding:
                generate_embeddings(tokenizer, domain, args.data_dir)

            for model in args.models:
                for mode in args.modes:
                    done += 1
                    print(f"\n{'='*60}")
                    print(
                        f"[{done}/{total}] "
                        f"{tokenizer}/{domain}/{model}/{mode}"
                    )
                    print(f"{'='*60}")
                    config_bar = tqdm(
                        total=3,
                        desc=f"{done:02d}/{total} {tokenizer}/{domain}/{model}/{mode}",
                        unit="step",
                        dynamic_ncols=True,
                        leave=True,
                    )

                    # Step 2: Train
                    config_bar.set_postfix_str("training")
                    if not args.skip_training:
                        train_model(
                            model_type=model,
                            mode=mode,
                            tokenizer=tokenizer,
                            domain=domain,
                            device=args.device,
                            num_workers=args.num_workers,
                            lstm_amp=args.lstm_amp,
                            fast=args.fast,
                            xgb_n_jobs=args.xgb_n_jobs,
                            wandb=args.wandb,
                            wandb_project=args.wandb_project,
                            wandb_entity=args.wandb_entity,
                            wandb_group=args.wandb_group,
                            wandb_mode=args.wandb_mode,
                            wandb_tags=args.wandb_tags,
                            data_dir=args.data_dir,
                            checkpoint_dir=args.checkpoint_dir,
                        )
                    config_bar.update(1)

                    # Step 3: Inference / Result Collection
                    config_bar.set_postfix_str("inference")
                    metrics_by_split = run_inference(
                        model,
                        mode,
                        tokenizer,
                        domain,
                        args.device,
                        args.lstm_amp,
                        args.fast,
                        args.xgb_n_jobs,
                        args.wandb,
                        args.wandb_project,
                        args.wandb_entity,
                        args.wandb_group,
                        args.wandb_mode,
                        args.wandb_tags,
                        args.data_dir,
                        args.checkpoint_dir,
                        args.results_dir,
                        args.val_path,
                        execute=not args.skip_inference,
                    )
                    config_bar.update(1)

                    config_bar.set_postfix_str("logging")
                    for split, metrics in metrics_by_split.items():
                        tracker.log_result(
                            domain=domain,
                            tokenizer=tokenizer,
                            model=model,
                            mode=mode,
                            split=split,
                            metrics=metrics,
                        )
                    config_bar.update(1)
                    config_bar.set_postfix_str("done")
                    config_bar.close()
                    overall_bar.update(1)

    overall_bar.close()

    # Step 4: Generate comparison tables
    print(f"\n{'='*60}")
    print("Generating comparison tables...")
    print(f"{'='*60}")
    tracker.generate_comparison_table()
    tracker.save_results()

    print("\nDone!")


if __name__ == "__main__":
    main()