#!/usr/bin/env python
# -*- coding: utf-8 -*-
"""
Self-evolution MVP cycle runner.
"""
from __future__ import annotations

import argparse
import json
import os
import sys
from pathlib import Path

from dotenv import load_dotenv

PROJECT_ROOT = Path(__file__).resolve().parent.parent
sys.path.insert(0, str(PROJECT_ROOT))
load_dotenv(dotenv_path=PROJECT_ROOT / ".env")

from evolution.mvp import ChatSourceConfig, DEFAULT_CANDIDATE_PATH, DEFAULT_POLICY_PATH, run_cycle


def parse_args() -> argparse.Namespace:
    parser = argparse.ArgumentParser(description="Run self-evolution MVP cycle")
    parser.add_argument(
        "--source",
        type=str,
        default="mysql",
        choices=["auto", "sqlite", "mysql"],
        help="Chat data source, default mysql (online)",
    )
    parser.add_argument("--hours", type=int, default=24, help="Lookback window for chat samples")
    parser.add_argument("--max-customers", type=int, default=200, help="Max customers sampled")
    parser.add_argument(
        "--max-messages-per-customer",
        type=int,
        default=80,
        help="Max messages loaded per customer",
    )
    parser.add_argument("--runtime-hours", type=int, default=24, help="Runtime metric window")
    parser.add_argument(
        "--publish",
        action="store_true",
        help="Write config/evolution_candidate.json when gate passes",
    )
    parser.add_argument(
        "--policy-path",
        type=str,
        default=str(DEFAULT_POLICY_PATH),
        help="Path to evolution gate policy file",
    )
    parser.add_argument(
        "--candidate-path",
        type=str,
        default=str(DEFAULT_CANDIDATE_PATH),
        help="Path to candidate output file",
    )
    parser.add_argument("--db-path", type=str, default="", help="SQLite path when --source sqlite")
    parser.add_argument("--mysql-host", type=str, default=os.getenv("MYSQL_HOST", "127.0.0.1"))
    parser.add_argument("--mysql-port", type=int, default=int(os.getenv("MYSQL_PORT", "3306")))
    parser.add_argument("--mysql-user", type=str, default=os.getenv("MYSQL_USER", "root"))
    parser.add_argument("--mysql-password", type=str, default=os.getenv("MYSQL_PASSWORD", ""))
    parser.add_argument("--mysql-database", type=str, default=os.getenv("MYSQL_DATABASE", "ai_cs"))
    return parser.parse_args()


def main() -> int:
    args = parse_args()
    os.environ.setdefault("PYTHONUTF8", "1")
    chat_source = ChatSourceConfig(
        source=args.source,
        sqlite_path=args.db_path or str(PROJECT_ROOT / "db" / "chat_log_db" / "chats.db"),
        mysql_host=args.mysql_host,
        mysql_port=args.mysql_port,
        mysql_user=args.mysql_user,
        mysql_password=args.mysql_password,
        mysql_database=args.mysql_database,
    )

    result = run_cycle(
        hours=args.hours,
        max_customers=args.max_customers,
        max_messages_per_customer=args.max_messages_per_customer,
        runtime_hours=args.runtime_hours,
        publish=args.publish,
        chat_source=chat_source,
        policy_path=Path(args.policy_path),
        candidate_path=Path(args.candidate_path),
    )
    print(json.dumps(result, ensure_ascii=False, indent=2))
    return 0


if __name__ == "__main__":
    raise SystemExit(main())