import argparse
import json
import sys

from .runtime import NZFCGramLongMemoryChat


def main():
    parser = argparse.ArgumentParser(description="NZFC-GRAM v1.2 local long-memory chat CLI")
    parser.add_argument("--repo-dir", default=".", help="Path to cloned Hugging Face repo root")
    parser.add_argument("--model-id", default="google/gemma-4-E2B-it")
    parser.add_argument("--memory-db", default=None, help="Optional SQLite memory DB path")
    parser.add_argument("--user-id", default="default_user")
    parser.add_argument("--project-id", default="default")
    parser.add_argument("--session-id", default="main")
    parser.add_argument("--language", default="ko", choices=["ko", "en", "auto"])
    parser.add_argument("--save-scope", default="project", choices=["session", "project", "user"])
    parser.add_argument("--debug", action="store_true")
    parser.add_argument("--no-model", action="store_true", help="Load retrieval stack only; generation will fail unless model is loaded")
    args = parser.parse_args()

    print("=" * 100)
    print("NZFC-GRAM v1.2 Local Long-Memory Chat")
    print("=" * 100)
    print("repo_dir:", args.repo_dir)
    print("model_id:", args.model_id)
    print("user_id:", args.user_id)
    print("project_id:", args.project_id)
    print("session_id:", args.session_id)
    print("save_scope:", args.save_scope)
    print("=" * 100)
    print("Commands:")
    print("  /exit")
    print("  /stats")
    print("  /remember <text>")
    print("  /forget_tag <tag>")
    print("  /reset_session")
    print("=" * 100)

    bot = NZFCGramLongMemoryChat(
        repo_dir=args.repo_dir,
        model_id=args.model_id,
        memory_db_path=args.memory_db,
        load_model=not args.no_model,
        require_model=not args.no_model,
    )

    while True:
        try:
            msg = input("\nUser> ").strip()
        except EOFError:
            break
        except KeyboardInterrupt:
            print("\n[EXIT]")
            break

        if not msg:
            continue

        if msg in ["/exit", "exit", "quit", "/quit"]:
            break

        if msg == "/stats":
            print(json.dumps(bot.stats(), ensure_ascii=False, indent=2))
            continue

        if msg.startswith("/remember "):
            text = msg[len("/remember "):].strip()
            rec = bot.remember(
                text,
                user_id=args.user_id,
                project_id=args.project_id,
                session_id=args.session_id,
                scope=args.save_scope,
            )
            print("[REMEMBERED]", rec["rid"])
            continue

        if msg.startswith("/forget_tag "):
            tag = msg[len("/forget_tag "):].strip()
            out = bot.forget_tag(
                tag,
                user_id=args.user_id,
                project_id=args.project_id,
                session_id=args.session_id,
                scope=args.save_scope,
            )
            print(json.dumps(out, ensure_ascii=False, indent=2))
            continue

        if msg == "/reset_session":
            out = bot.reset_session(
                user_id=args.user_id,
                project_id=args.project_id,
                session_id=args.session_id,
            )
            print(json.dumps(out, ensure_ascii=False, indent=2))
            continue

        out = bot.chat(
            msg,
            user_id=args.user_id,
            project_id=args.project_id,
            session_id=args.session_id,
            save_turn=True,
            save_scope=args.save_scope,
            return_debug=args.debug,
            response_language=args.language,
        )

        print("\nAssistant>")
        print(out["answer"])

        if args.debug:
            print("\n[DEBUG]")
            debug_copy = dict(out)
            if "debug" in debug_copy:
                debug_copy["debug"] = {
                    "memory_pack_chars": len(debug_copy["debug"].get("memory_pack", "")),
                    "system_prompt_chars": len(debug_copy["debug"].get("system_prompt", "")),
                    "user_prompt_chars": len(debug_copy["debug"].get("user_prompt", "")),
                }
            print(json.dumps(debug_copy, ensure_ascii=False, indent=2))


if __name__ == "__main__":
    main()