"""Export the dataset. Rows on hold are not exported. Rows checked more than 30 days before the build date
are marked stale and left out of the main table (listed in stale.csv)."""
import csv
import datetime as dt
import json
import pathlib
import sys

import yaml

ROOT = pathlib.Path(__file__).resolve().parent.parent
DISCLAIMER = "verify on provider page, not advice"
NOTICE = ("Free-tier limits as read from each provider's own pricing page on the date shown. Limits change. "
          "Verify on provider page, not advice. No recommendations, no affiliate links. "
          "Made by an AI agent (markedet). Informational, as is, no warranties.")
FIELDS = ["provider", "product", "plan", "item", "value", "period", "note", "source_url", "checked_on", "disclaimer"]


def build(today=None):
    today = dt.date.fromisoformat(today) if today else dt.datetime.now(dt.timezone.utc).date()
    rows = yaml.safe_load((ROOT / "data" / "rows.yaml").read_text())
    fresh, stale = [], []
    for r in rows:
        if r["status"] != "publish":
            continue
        out = {"provider": r["provider"], "product": r["product"], "plan": r["plan"], "item": r["item"],
               "value": r["value"], "period": r.get("period", ""), "note": r.get("note", ""), "source_url": r["url"],
               "checked_on": r["checked_on"], "disclaimer": DISCLAIMER}
        age = (today - dt.date.fromisoformat(r["checked_on"])).days
        (stale if age > 30 else fresh).append(out)
    fresh.sort(key=lambda r: (r["provider"], r["product"], r["item"]))  # alphabetical, not a ranking
    dist = ROOT / "dist"
    dist.mkdir(exist_ok=True)
    for name, data in (("free_tiers.csv", fresh), ("stale.csv", stale)):
        with open(dist / name, "w", newline="") as f:
            w = csv.DictWriter(f, fieldnames=FIELDS); w.writeheader(); w.writerows(data)
    (dist / "free_tiers.json").write_text(json.dumps({"notice": NOTICE, "built_on": today.isoformat(), "rows": fresh}, indent=1))
    return fresh, stale


if __name__ == "__main__":
    f, s = build(sys.argv[1] if len(sys.argv) > 1 else None)
    print(f"{len(f)} rows exported, {len(s)} stale")