"""
Check NAP consistency: compare each row to reference NAP and set match flags.
"""
import argparse
from pathlib import Path

import pandas as pd

from config import DATA_PATH, REFERENCE_NAP_PATH, OUTPUT_DIR, NAP_COLUMNS, SOURCE_COLUMN
from normalize import normalize_nap


def load_reference(path: str) -> dict:
    df = pd.read_csv(path)
    row = df.iloc[0]
    return normalize_nap(
        row.get("name"),
        row.get("address"),
        row.get("phone"),
    )


def main():
    parser = argparse.ArgumentParser()
    parser.add_argument("--input", default=DATA_PATH)
    parser.add_argument("--reference", default=REFERENCE_NAP_PATH)
    parser.add_argument("--output", default=None)
    args = parser.parse_args()
    args.output = args.output or str(OUTPUT_DIR / "consistency_report.csv")

    if not Path(args.reference).exists():
        raise FileNotFoundError(f"Reference NAP not found: {args.reference}. Create data/reference_nap.csv with name, address, phone.")
    if not Path(args.input).exists():
        raise FileNotFoundError(f"Input not found: {args.input}. Create data/citations.csv with name, address, phone, source.")

    ref = load_reference(args.reference)
    df = pd.read_csv(args.input)
    for c in NAP_COLUMNS:
        if c not in df.columns:
            raise ValueError(f"CSV must have columns: {NAP_COLUMNS}")

    rows = []
    for _, row in df.iterrows():
        nap = normalize_nap(row.get("name"), row.get("address"), row.get("phone"))
        name_ok = nap["name"] == ref["name"]
        address_ok = nap["address"] == ref["address"]
        phone_ok = nap["phone"] == ref["phone"]
        rows.append({
            SOURCE_COLUMN: row.get(SOURCE_COLUMN, ""),
            "name_match": name_ok,
            "address_match": address_ok,
            "phone_match": phone_ok,
            "nap_consistent": name_ok and address_ok and phone_ok,
        })

    out = pd.DataFrame(rows)
    Path(args.output).parent.mkdir(parents=True, exist_ok=True)
    out.to_csv(args.output, index=False)
    print(f"Saved to {args.output}")


if __name__ == "__main__":
    main()