#!/usr/bin/env python3
"""One-off helper to add a reminder directly to the SQLite DB."""
import sqlite3
import sys
from datetime import datetime, timezone
from pathlib import Path

WORKSPACE = Path(__file__).resolve().parent.parent
DB_PATH = WORKSPACE / "db" / "reminders.sqlite"


def main() -> int:
    if len(sys.argv) < 3:
        print("usage: remind_add.py <at_iso> <text>", file=sys.stderr)
        return 1
    at_str = sys.argv[1]
    text = sys.argv[2]

    try:
        datetime.fromisoformat(at_str)
    except ValueError as exc:
        print(f"invalid --at datetime: {exc}", file=sys.stderr)
        return 1

    DB_PATH.parent.mkdir(parents=True, exist_ok=True)
    conn = sqlite3.connect(DB_PATH)
    conn.row_factory = sqlite3.Row
    conn.executescript(
        """
        PRAGMA journal_mode = WAL;
        PRAGMA foreign_keys = ON;

        CREATE TABLE IF NOT EXISTS reminders (
            id INTEGER PRIMARY KEY AUTOINCREMENT,
            text TEXT NOT NULL CHECK(text <> ''),
            enabled INTEGER NOT NULL DEFAULT 1 CHECK(enabled IN (0, 1)),
            timezone TEXT NOT NULL DEFAULT 'Europe/Prague',
            created_at TEXT NOT NULL,
            updated_at TEXT NOT NULL,
            deleted_at TEXT
        );

        CREATE TABLE IF NOT EXISTS schedule_at (
            id INTEGER PRIMARY KEY AUTOINCREMENT,
            reminder_id INTEGER NOT NULL REFERENCES reminders(id) ON DELETE CASCADE,
            at_datetime TEXT NOT NULL
        );

        CREATE INDEX IF NOT EXISTS idx_reminders_text ON reminders(text);
        CREATE INDEX IF NOT EXISTS idx_at_datetime ON schedule_at(reminder_id, at_datetime);
        """
    )

    now = datetime.now(timezone.utc).isoformat(timespec="seconds")
    cur = conn.execute(
        "INSERT INTO reminders (text, enabled, timezone, created_at, updated_at) VALUES (?, 1, 'Europe/Prague', ?, ?)",
        (text, now, now),
    )
    reminder_id = cur.lastrowid
    conn.execute(
        "INSERT INTO schedule_at (reminder_id, at_datetime) VALUES (?, ?)",
        (reminder_id, at_str),
    )
    conn.commit()
    conn.close()
    print(f"added reminder #{reminder_id} at {at_str}: {text}")
    return 0


if __name__ == "__main__":
    sys.exit(main())