# db_users_search.py
import sqlite3
from contextlib import contextmanager

DB_PATH = "app.db"

@contextmanager
def get_conn():
    conn = sqlite3.connect(DB_PATH, check_same_thread=False)
    conn.row_factory = sqlite3.Row
    try:
        yield conn
        conn.commit()
    finally:
        conn.close()

def search_users(q: str, limit: int, offset: int):
    q = (q or "").strip()
    like = f"%{q}%"
    with get_conn() as conn:
        rows = conn.execute("""
            SELECT id, username, display_name, email, role, is_active, created_at
            FROM users
            WHERE (? = '')
               OR (username LIKE ? COLLATE NOCASE
                OR display_name LIKE ? COLLATE NOCASE
                OR email LIKE ? COLLATE NOCASE)
            ORDER BY username
            LIMIT ? OFFSET ?
        """, (q, like, like, like, limit, offset)).fetchall()

        total = conn.execute("""
            SELECT COUNT(*)
            FROM users
            WHERE (? = '')
               OR (username LIKE ? COLLATE NOCASE
                OR display_name LIKE ? COLLATE NOCASE
                OR email LIKE ? COLLATE NOCASE)
        """, (q, like, like, like)).fetchone()[0]

    return [dict(r) for r in rows], int(total)