from __future__ import annotations

import aiosqlite


async def seed_users_from_legacy_persons(conn: aiosqlite.Connection):
    """Seed User and HouseholdMember from legacy test persons if present.

    This is a no-op if the Person table is empty or missing.
    """
    # Ensure required tables exist
    try:
        await conn.execute("SELECT 1 FROM User LIMIT 1")
        await conn.execute("SELECT 1 FROM Household LIMIT 1")
        await conn.execute("SELECT 1 FROM HouseholdMember LIMIT 1")
    except Exception:
        return

    # If any users exist already, do nothing
    async with conn.execute("SELECT COUNT(1) FROM User") as c:
        row = await c.fetchone()
        if row and int(row[0]) > 0:
            return

    # Default household id (if present)
    hid: int | None = None
    try:
        async with conn.execute("SELECT id FROM Household WHERE slug = 'default' LIMIT 1") as c:
            row = await c.fetchone()
            if row:
                hid = int(row[0])
    except Exception:
        hid = None

    # Copy over Person rows into User and create membership
    try:
        async with conn.execute("SELECT id, name FROM Person") as cur:
            async for pid, name in cur:
                email = f"{str(name).lower()}@example.com"
                await conn.execute(
                    "INSERT OR IGNORE INTO User (id, email, display_name) VALUES (?, ?, ?)",
                    (int(pid), email, str(name)),
                )
                if hid is not None:
                    await conn.execute(
                        "INSERT OR IGNORE INTO HouseholdMember (user_id, household_id, role) VALUES (?, ?, 'admin')",
                        (int(pid), hid),
                    )
    except Exception:
        # Person table may not exist in some contexts; ignore
        return