#!/usr/bin/env python3
"""Run the one-call direct protocol MVP from compact Whisper JSON."""

from __future__ import annotations

import argparse
import json
import re
import shutil
import sys
import time
from datetime import datetime
from pathlib import Path
from typing import Any, Callable

REPO_ROOT = Path(__file__).resolve().parents[1]
if str(REPO_ROOT) not in sys.path:
    sys.path.insert(0, str(REPO_ROOT))

from src.meeting_lab.llm.ollama import DEFAULT_ENDPOINT  # noqa: E402
from src.meeting_lab.protocol.generate_direct_protocol import (  # noqa: E402
    DEFAULT_MODEL,
    DirectProtocolResult,
    generate_direct_protocol,
)


DEFAULT_OUTPUT_ROOT = Path("meeting_data/runs")


def parse_args(argv: list[str] | None = None) -> argparse.Namespace:
    parser = argparse.ArgumentParser(description="Generate one direct protocol from compact Whisper JSON.")
    parser.add_argument("transcript", type=Path)
    parser.add_argument("--context", type=Path)
    parser.add_argument("--output-root", type=Path, default=DEFAULT_OUTPUT_ROOT)
    parser.add_argument("--model", default=DEFAULT_MODEL)
    parser.add_argument("--ollama-endpoint", default=DEFAULT_ENDPOINT)
    return parser.parse_args(argv)


def create_unique_run_dir(
    output_root: Path,
    transcript_stem: str,
    now: Callable[[], datetime] = datetime.now,
) -> Path:
    safe_stem = re.sub(r"[^A-Za-z0-9_.-]+", "_", transcript_stem).strip("._-") or "meeting"
    base = output_root / f"{safe_stem}_{now().strftime('%Y%m%d_%H%M%S')}"
    candidate = base
    suffix = 1
    while candidate.exists():
        candidate = output_root / f"{base.name}_{suffix:02d}"
        suffix += 1
    candidate.mkdir(parents=True)
    return candidate


def write_json(path: Path, data: Any) -> None:
    path.write_text(json.dumps(data, ensure_ascii=False, indent=2) + "\n", encoding="utf-8")


def persist_result(run_dir: Path, result: DirectProtocolResult) -> Path:
    protocol_dir = run_dir / "protocol"
    protocol_dir.mkdir()
    (protocol_dir / "exact_prompt.txt").write_text(result.exact_prompt, encoding="utf-8")
    write_json(protocol_dir / "raw_response.json", result.raw_response)
    write_json(protocol_dir / "runtime_metadata.json", result.runtime_metadata)
    protocol_path = run_dir / "protocol.md"
    protocol_path.write_text(result.protocol_text, encoding="utf-8")
    return protocol_path


def run(args: argparse.Namespace) -> tuple[int, Path, Path | None]:
    run_dir = create_unique_run_dir(args.output_root, args.transcript.stem)
    timestamp = datetime.now().astimezone().isoformat(timespec="seconds")
    started = time.perf_counter()
    protocol_path: Path | None = None
    metadata: dict[str, Any] = {
        "run_id": run_dir.name,
        "timestamp": timestamp,
        "transcript_path": str(args.transcript.resolve()),
        "context_path": str(args.context.resolve()) if args.context else None,
        "model": args.model,
        "ollama_endpoint": args.ollama_endpoint,
        "status": "running",
        "total_runtime_seconds": None,
        "final_protocol_path": None,
    }
    try:
        transcript_dir = run_dir / "transcript"
        transcript_dir.mkdir()
        if not args.transcript.is_file():
            raise FileNotFoundError(f"Transcript file does not exist: {args.transcript}")
        preserved_transcript = transcript_dir / "transcript.json"
        shutil.copy2(args.transcript, preserved_transcript)

        preserved_context: Path | None = None
        if args.context is not None:
            if not args.context.is_file():
                raise FileNotFoundError(f"Meeting Context file does not exist: {args.context}")
            context_dir = run_dir / "context"
            context_dir.mkdir()
            preserved_context = context_dir / "meeting_context.yaml"
            shutil.copy2(args.context, preserved_context)

        write_json(
            run_dir / "input_manifest.json",
            {
                "transcript_source": str(args.transcript.resolve()),
                "transcript_copy": str(preserved_transcript.resolve()),
                "context_source": str(args.context.resolve()) if args.context else None,
                "context_copy": str(preserved_context.resolve()) if preserved_context else None,
            },
        )
        result = generate_direct_protocol(
            preserved_transcript,
            preserved_context,
            model=args.model,
            endpoint=args.ollama_endpoint,
        )
        protocol_path = persist_result(run_dir, result)
        metadata["status"] = "completed"
        metadata["final_protocol_path"] = str(protocol_path.resolve())
    except Exception as exc:
        metadata["status"] = "failed"
        metadata["failure"] = f"{type(exc).__name__}: {exc}"
        print(f"Error: {metadata['failure']}", file=sys.stderr)
    finally:
        metadata["total_runtime_seconds"] = round(time.perf_counter() - started, 3)
        write_json(run_dir / "run_metadata.json", metadata)
    return (0 if metadata["status"] == "completed" else 2), run_dir, protocol_path


def main(argv: list[str] | None = None) -> int:
    code, _run_dir, protocol_path = run(parse_args(argv))
    if protocol_path is not None:
        print(protocol_path)
    return code


if __name__ == "__main__":
    raise SystemExit(main())