#!/usr/bin/env python3
"""
Validate provenance metadata on training pairs.

Usage:
    python validate_provenance.py data/merged_training_data.jsonl
    python validate_provenance.py data/curated_dataset.jsonl --strict
"""

import argparse
import json
import sys
from pathlib import Path

try:
    from training_pair_provenance import validate_provenance, get_provenance_stats, print_provenance_report
except ImportError:
    sys.path.insert(0, str(Path(__file__).parent))
    from training_pair_provenance import validate_provenance, get_provenance_stats, print_provenance_report


def load_jsonl(path: Path) -> list[dict]:
    """Load a JSONL file."""
    entries = []
    with open(path) as f:
        for line in f:
            line = line.strip()
            if line:
                entries.append(json.loads(line))
    return entries


def main():
    parser = argparse.ArgumentParser(description="Validate provenance metadata")
    parser.add_argument("input", type=str, help="Path to JSONL training data")
    parser.add_argument("--strict", action="store_true", help="Fail on any missing provenance")
    parser.add_argument("--report", action="store_true", help="Print detailed report")
    args = parser.parse_args()

    input_path = Path(args.input)
    if not input_path.exists():
        print(f"ERROR: {input_path} not found")
        sys.exit(1)

    pairs = load_jsonl(input_path)
    print(f"Loaded {len(pairs)} pairs from {input_path}")

    # Validate each pair
    errors = []
    for i, pair in enumerate(pairs):
        valid, pair_errors = validate_provenance(pair)
        if not valid:
            errors.append((i, pair_errors))

    # Print results
    if errors:
        print(f"\nFAILED: {len(errors)} pairs with provenance issues")
        for idx, pair_errors in errors[:10]:  # Show first 10
            print(f"  Pair {idx}: {', '.join(pair_errors)}")
        if len(errors) > 10:
            print(f"  ... and {len(errors) - 10} more")
    else:
        print("\nPASSED: All pairs have valid provenance")

    # Stats
    stats = get_provenance_stats(pairs)
    if args.report:
        print()
        print_provenance_report(stats)

    # CI gate
    if args.strict and errors:
        print("\nStrict mode: failing due to provenance errors")
        sys.exit(1)

    sys.exit(0 if not errors else 1)


if __name__ == "__main__":
    main()