#!/usr/bin/env python3
"""Run shards of the calibrated-BCI-v2-gated standard-depth panel."""
import argparse
import hashlib
import json
import os
import subprocess

from oral_a_dynamic_scaling import (
    DEPTHS,
    METHODS,
    SEEDS,
    existing_matches,
    jobs,
)


ROOT = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
PROTOCOL_PATH = os.path.join(ROOT, "ORAL_A_RECOVERY_V2.md")
LEGACY_RUNNER_PATH = os.path.join(
    ROOT, "experiments", "oral_a_dynamic_scaling.py")


def sha256(path):
    digest = hashlib.sha256()
    with open(path, "rb") as handle:
        for chunk in iter(lambda: handle.read(1024 * 1024), b""):
            digest.update(chunk)
    return digest.hexdigest()


def git_output(*args):
    return subprocess.run(
        ["git", *args], cwd=ROOT, check=True, capture_output=True,
        text=True).stdout.strip()


def require_prerequisites(d4_path, bci_v2_path):
    with open(d4_path) as handle:
        d4 = json.load(handle)
    with open(bci_v2_path) as handle:
        bci_v2 = json.load(handle)
    if not (
        d4.get("protocol") == "kp_dynamic_neutral_projection_confirmation_v1"
        and d4.get("status") == "passed"
        and d4.get("review_score_after") == 7
    ):
        raise ValueError("oral-A recovery v2 requires the complete D4 pass")
    if not (
        bci_v2.get("protocol")
        == "oral_b_v2_calibrated_recovery_confirmation_v1"
        and bci_v2.get("status") == "passed"
        and bci_v2.get("complete_grid") is True
        and bci_v2.get("oral_b_v2_outcome_surprise_established") is True
        and bci_v2.get("review_score_after") == 8
        and bci_v2.get("new_oral_a_v2_protocol_may_be_frozen") is True
        and bci_v2.get("old_oral_a_gate_remains_closed") is True
        and bci_v2.get("all_prior_failures_preserved") is True
    ):
        raise ValueError(
            "oral-A recovery v2 requires the complete calibrated BCI-v2 pass")

    paths = [
        os.path.abspath(__file__),
        PROTOCOL_PATH,
        LEGACY_RUNNER_PATH,
        os.path.abspath(d4_path),
        os.path.abspath(bci_v2_path),
        os.path.join(ROOT, "experiments", "conv_run.py"),
    ]
    relative = [os.path.relpath(path, ROOT) for path in paths]
    tracked = all(
        subprocess.run(
            ["git", "ls-files", "--error-unmatch", path],
            cwd=ROOT,
            capture_output=True,
        ).returncode == 0
        for path in relative
    )
    dirty = bool(git_output(
        "status", "--porcelain", "--untracked-files=no"))
    if dirty or not tracked:
        raise RuntimeError(
            "oral-A recovery v2 requires a clean tracked source")
    return {
        "git_commit": git_output("rev-parse", "HEAD"),
        "protocol_sha256": sha256(PROTOCOL_PATH),
        "d4_gate_sha256": sha256(d4_path),
        "bci_v2_gate_sha256": sha256(bci_v2_path),
        "legacy_runner_sha256": sha256(LEGACY_RUNNER_PATH),
    }


def main():
    parser = argparse.ArgumentParser()
    parser.add_argument(
        "--d4_gate",
        default="results/kp_dynamic_projection_confirmation_gate.json",
    )
    parser.add_argument(
        "--bci_v2_gate",
        default="results/bci_v2_calibrated_confirmation_gate.json",
    )
    parser.add_argument("--device", default="cuda")
    parser.add_argument("--method", choices=("all",) + METHODS, default="all")
    parser.add_argument("--depth", type=int, choices=DEPTHS)
    parser.add_argument("--seed", type=int, choices=SEEDS)
    parser.add_argument("--shard-index", type=int, default=0)
    parser.add_argument("--num-shards", type=int, default=1)
    parser.add_argument(
        "--outdir", default="results/oral_a_dynamic_scaling_v2")
    parser.add_argument("--dry-run", action="store_true")
    args = parser.parse_args()
    if not 0 <= args.shard_index < args.num_shards:
        raise ValueError("invalid shard index")
    source = require_prerequisites(args.d4_gate, args.bci_v2_gate)
    selected = jobs(args.device, args.outdir)
    if args.method != "all":
        selected = [job for job in selected if job[0] == args.method]
    if args.depth is not None:
        selected = [job for job in selected if job[1] == args.depth]
    if args.seed is not None:
        selected = [job for job in selected if job[2] == args.seed]
    selected = [
        job
        for index, job in enumerate(selected)
        if index % args.num_shards == args.shard_index
    ]
    if not selected:
        raise ValueError("no oral-A recovery-v2 jobs match the requested shard")

    os.makedirs(args.outdir, exist_ok=True)
    for method, depth, seed, path, command in selected:
        tag = f"{method}_d{depth}_s{seed}"
        if os.path.exists(path):
            if not existing_matches(
                path, method, depth, seed, source["git_commit"]
            ):
                raise RuntimeError(
                    f"refusing mismatched existing record: {path}")
            print(f"preserving {tag}", flush=True)
            continue
        print(tag, " ".join(command), flush=True)
        if not args.dry_run:
            subprocess.run(command, cwd=ROOT, check=True)


if __name__ == "__main__":
    main()