"""
Project entrypoint.
"""

from __future__ import annotations

import sys
from pathlib import Path

project_root = Path(__file__).parent
sys.path.insert(0, str(project_root))


def _sqlite_supports_trigram(sqlite_module) -> bool:
    conn = None
    try:
        conn = sqlite_module.connect(":memory:")
        conn.execute("create virtual table t using fts5(content, tokenize='trigram')")
        return True
    except Exception:
        return False
    finally:
        if conn is not None:
            conn.close()


def _ensure_sqlite_for_chroma():
    try:
        import sqlite3
    except Exception:
        return

    if _sqlite_supports_trigram(sqlite3):
        return

    try:
        import pysqlite3
    except Exception as exc:
        print(
            "[WARN] sqlite3 does not support trigram tokenizer and pysqlite3 is unavailable: "
            f"{exc}"
        )
        print("[WARN] Chroma may fail and fallback to JSON storage.")
        return

    if _sqlite_supports_trigram(pysqlite3):
        sys.modules["sqlite3"] = pysqlite3
        print("[INFO] sqlite3 switched to pysqlite3 for Chroma trigram support.")
    else:
        print("[WARN] pysqlite3 is installed but still lacks trigram tokenizer support.")
        print("[WARN] Chroma may fail and fallback to JSON storage.")


_ensure_sqlite_for_chroma()

from src.core.bot import main as run_bot_main


if __name__ == "__main__":
    run_bot_main()