ai-g3sb-backman2.0/backend/main.py

#!/usr/bin/env python3
"""
Text2SQL 多智能体系统 - CLI 入口

用法：在项目根目录执行 python backend/main.py
"""

import os
import sys
import argparse
import logging
from pathlib import Path
from typing import Optional

from dotenv import load_dotenv

# 从仓库根目录运行 python backend/main.py 时，将 backend 加入模块搜索路径
_backend_dir = Path(__file__).resolve().parent
if str(_backend_dir) not in sys.path:
    sys.path.insert(0, str(_backend_dir))

# 配置日志
logging.basicConfig(
    level=logging.INFO,
    format='%(asctime)s [%(levelname)s] %(name)s: %(message)s',
    datefmt='%Y-%m-%d %H:%M:%S'
)
logger = logging.getLogger(__name__)

def _repo_root() -> Path:
    """仓库根目录（含 data/、.env、api_server.py 的目录）。"""
    return Path(__file__).resolve().parent.parent


def _load_project_env():
    """加载项目根目录 .env，供后续 os.getenv 使用。"""
    load_dotenv(_repo_root() / ".env")


def resolve_sql_dialect(name: str) -> str:
    """CLI / 配置中的方言别名统一为 sqlglot 方言名（SQL Server -> tsql）。"""
    n = (name or "sqlserver").lower().strip()
    if n in ("sqlserver", "mssql"):
        return "tsql"
    return n


def setup_environment():
    """环境检查"""
    _load_project_env()
    ms_key = os.getenv("MODELSCOPE_API_KEY", "").strip()
    oa_key = os.getenv("OPENAI_API_KEY", "").strip()
    oa_key_ok = oa_key and not (
        oa_key.startswith("http://") or oa_key.startswith("https://")
    )
    if ms_key:
        pass  # ModelScope：BASE_URL / MODEL 有默认值，仅需 KEY
    elif oa_key_ok:
        if not os.getenv("OPENAI_EMBEDDING_MODEL", "").strip():
            logger.warning("未设置 OPENAI_EMBEDDING_MODEL（远程 Embedding 模型名）")
            return False
    else:
        if not os.getenv("DASHSCOPE_API_KEY", "").strip():
            logger.warning(
                "未设置 MODELSCOPE_API_KEY、"
                "OPENAI_API_KEY+OPENAI_EMBEDDING_MODEL 或 DASHSCOPE_API_KEY"
            )
            return False
        base = (
            os.getenv("DASHSCOPE_BASE_URL") or os.getenv("DASHSCOPE_base_url", "")
        ).strip()
        if not base:
            logger.warning("未设置 DASHSCOPE_BASE_URL（或 DASHSCOPE_base_url）")
            return False
        if not os.getenv("DASHSCOPE_MODEL", "").strip():
            logger.warning("未设置 DASHSCOPE_MODEL")
            return False

    # 检查Schema文件（支持相对路径和绝对路径）
    schema_path_str = os.getenv("SCHEMA_PATH", "./data/schemas/G3SB_MCDataDictionary_table_structure.json")
    schema_path = Path(schema_path_str)
    
    # 如果是相对路径，尝试从多个位置查找
    if not schema_path.is_absolute():
        # 尝试1: PyInstaller 临时目录（单文件模式）
        import sys
        if getattr(sys, 'frozen', False) and hasattr(sys, '_MEIPASS'):
            meipass_schema = Path(sys._MEIPASS) / schema_path_str
            if meipass_schema.exists():
                schema_path = meipass_schema
        
        # 尝试2: 当前工作目录
        if not schema_path.exists():
            schema_path = Path.cwd() / schema_path_str
        
        # 尝试3: 脚本所在目录
        if not schema_path.exists():
            script_dir = Path(__file__).resolve().parent.parent
            schema_path = script_dir / schema_path_str
        
        # 尝试4: 可执行文件所在目录
        if not schema_path.exists() and getattr(sys, 'frozen', False):
            exe_dir = Path(sys.executable).parent
            schema_path = exe_dir / schema_path_str
    
    if not schema_path.exists():
        logger.warning(f"Schema文件不存在: {schema_path}")
        logger.info("请将G3SB Schema文件放置在 ./data/schemas/ 目录")
        return False

    # 检查API Key
    api_key = os.getenv("DEEPSEEK_API_KEY", "").strip()
    if not api_key:
        logger.warning("环境变量 DEEPSEEK_API_KEY 未设置")
        logger.info("请在 .env 文件中配置，或 export DEEPSEEK_API_KEY=your_key")
        return False

    logger.info(f"[OK] 环境检查通过")
    logger.info(f"  - Schema: {schema_path}")
    logger.info(f"  - API Key: {'已配置' if api_key else '未配置'}")
    
    return True


def _default_g3sb_meta_path(structure_path: str) -> Optional[str]:
    """若存在与 table_structure 同名的 table_meta 文件则返回其路径。"""
    p = Path(structure_path)
    if "table_structure" not in p.name:
        return None
    cand = p.parent / p.name.replace("table_structure", "table_meta")
    return str(cand) if cand.is_file() else None


def load_schema(schema_path: str, schema_meta_path: Optional[str] = None):
    """加载 Schema；G3SB structure JSON 会自动尝试配对 table_meta（可用 --schema-meta 指定）。"""
    from schema.manager import SchemaManager

    meta = (
        schema_meta_path
        if schema_meta_path is not None
        else _default_g3sb_meta_path(schema_path)
    )
    logger.info(f"加载Schema: {schema_path}")
    if meta:
        logger.info(f"  表注释(meta): {meta}")

    schema_mgr = SchemaManager.load_from_json(
        schema_path, g3sb_meta_path=meta
    )

    stats = schema_mgr.get_statistics()
    logger.info(
        f"[OK] Schema加载完成: {stats['database']}, "
        f"共{stats['total_tables']}张表, {stats['total_columns']}个字段"
    )

    return schema_mgr


def create_orchestrator(schema_mgr, args):
    """创建编排器"""
    from agents.orchestrator import Text2SQLOrchestrator
    from llm.deepseek_client import DeepSeekConfig

    translate_en = os.getenv("TRANSLATE_EN_TO_ZH", "true").strip().lower() not in (
        "0",
        "false",
        "no",
        "off",
    )
    if getattr(args, "no_translate_en", False):
        translate_en = False

    api_key = (args.api_key or os.getenv("DEEPSEEK_API_KEY") or "").strip()
    if not api_key:
        raise ValueError(
            "未配置 DeepSeek API Key：请在 .env 中设置 DEEPSEEK_API_KEY，"
            "或使用命令行参数 --api-key"
        )
    base_url = (os.getenv("DEEPSEEK_BASE_URL") or "https://api.deepseek.com").strip()

    config = DeepSeekConfig(
        api_key=api_key,
        base_url=base_url,
        model_name=args.model or "deepseek-chat",
        temperature=args.temperature,
        max_tokens=args.max_tokens,
    )

    orchestrator = Text2SQLOrchestrator(
        schema_manager=schema_mgr,
        deepseek_config=config,
        vector_db_path=args.vector_db,
        max_retry=args.max_retry,
        use_vector_search=not args.no_vector_search,
        # Few-shot配置
        fewshot_enabled=not args.no_fewshot,
        fewshot_top_k=args.fewshot_top_k,
        fewshot_min_rating=args.fewshot_min_rating,
        translate_english_to_zh=translate_en,
    )

    return orchestrator


def single_query(orchestrator, question: str, dialect: str = "tsql"):
    """单次查询"""
    import time

    from agents.orchestrator import GenerationResult
    from utils.dialog_classifier import DialogIntent, classify_dialog

    logger.info(f"[Q] 问题: {question}")

    classified = classify_dialog(question, llm_client=orchestrator.deepseek)
    if classified.intent == DialogIntent.CONVERSATION:
        reply = classified.reply_suggestion or ""
        logger.info("[Q] 意图: conversation（跳过 SQL 生成）")
        print("\n" + "=" * 60)
        print("对话 / 非查询输入（未触发 SQL 生成）")
        print("=" * 60)
        print(reply)
        print(f"\n使用表: []")
        return GenerationResult(
            sql="",
            valid=False,
            errors=[],
            warnings=[],
            tables_used=[],
            attempts=0,
            metadata={"dialog_intent": DialogIntent.CONVERSATION.value},
        )

    start = time.time()
    result = orchestrator.generate(
        question=question,
        dialect=dialect,
        top_k_candidates=20
    )
    elapsed = time.time() - start

    print("\n" + "=" * 60)
    print("生成结果:")
    print("=" * 60)

    if result.valid:
        print(f"[OK] SQL (耗时 {elapsed:.2f}s, 尝试 {result.attempts} 次):\n")
        print(result.sql)
    else:
        print(f"[FAIL] 生成失败 (尝试 {result.attempts} 次)")
        for err in result.errors:
            print(f"  - {err}")

    if result.warnings:
        print("\n[WARN] 警告:")
        for w in result.warnings:
            print(f"  - {w}")

    dbe = result.metadata.get("db_empty_feedback")
    if result.valid and dbe:
        print("\n[DB 探针 0 — 无数据行] 说明:")
        print(dbe)

    print(f"\n使用表: {result.tables_used}")

    return result


def interactive_mode(orchestrator, dialect: str = "tsql"):
    """交互式模式"""
    print("\n" + "=" * 60)
    print("Text2SQL 交互模式（输入 'quit' 或 'exit' 退出）")
    print("提示：请描述业务数据查询需求；寒暄或「你是谁」等会由对话分类处理，不生成 SQL。")
    print("=" * 60 + "\n")

    while True:
        try:
            question = input("❓ 请输入业务查询问题: ").strip()
            if question.lower() in ('quit', 'exit', 'q'):
                print("再见！")
                break

            if not question:
                continue

            result = single_query(orchestrator, question, dialect)
            print()

        except KeyboardInterrupt:
            print("\n再见！")
            break
        except Exception as e:
            logger.error(f"查询失败: {e}")


def main():
    parser = argparse.ArgumentParser(
        description="Text2SQL：运行后进入交互式自然语言生成 SQL（python backend/main.py）"
    )
    parser.add_argument(
        "--schema", "-s",
        default="./data/schemas/G3SB_MCDataDictionary_table_structure.json",
        help="Schema文件路径（默认: ./data/schemas/G3SB_MCDataDictionary_table_structure.json）"
    )
    parser.add_argument(
        "--schema-meta",
        default=None,
        help="G3SB table_meta.json；默认自动使用同目录下文件名含 table_meta 的配对文件",
    )
    parser.add_argument(
        "--dialect", "-d",
        default=os.getenv("TEXT2SQL_DIALECT", "sqlserver").strip(),
        choices=["mysql", "postgresql", "sqlite", "tsql", "sqlserver", "mssql"],
        help="SQL方言（默认: sqlserver / T-SQL；可用环境变量 TEXT2SQL_DIALECT 覆盖）",
    )
    parser.add_argument(
        "--api-key",
        help="DeepSeek API Key（默认从DEEPSEEK_API_KEY环境变量读取）"
    )
    parser.add_argument(
        "--model", "-m",
        default="deepseek-chat",
        help="DeepSeek模型名称（默认: deepseek-chat）"
    )
    parser.add_argument(
        "--temperature", "-t",
        type=float,
        default=0.3,
        help="生成温度（默认: 0.3）"
    )
    parser.add_argument(
        "--max-tokens",
        type=int,
        default=4096,
        help="最大token数（默认: 4096）"
    )
    parser.add_argument(
        "--max-retry",
        type=int,
        default=2,
        help="最大重试次数（默认: 2）"
    )
    _load_project_env()
    parser.add_argument(
        "--vector-db",
        default=os.getenv("VECTOR_DB_PATH", "./data/embeddings/chroma").strip(),
        help="向量数据库路径（默认来自环境变量 VECTOR_DB_PATH）"
    )
    parser.add_argument(
        "--no-vector-search",
        action="store_true",
        help="禁用向量检索（使用所有表）"
    )
    # Few-shot 配置
    parser.add_argument(
        "--no-fewshot",
        action="store_true",
        help="禁用few-shot示例增强"
    )
    parser.add_argument(
        "--fewshot-top-k",
        type=int,
        default=int(os.getenv("FEWSHOT_TOP_K", "3")),
        help="每次使用的few-shot示例数量（默认: 3）"
    )
    parser.add_argument(
        "--fewshot-min-rating",
        type=int,
        default=int(os.getenv("FEWSHOT_MIN_RATING", "7")),
        help="few-shot示例最低评分（默认: 7）"
    )
    parser.add_argument(
        "--verbose", "-v",
        action="store_true",
        help="详细日志"
    )
    parser.add_argument(
        "--no-translate-en",
        action="store_true",
        help="关闭英文问句自动译为中文（默认开启；也可用 TRANSLATE_EN_TO_ZH=false）",
    )

    args = parser.parse_args()
    args.dialect = resolve_sql_dialect(args.dialect)

    # 日志级别
    if args.verbose:
        logging.getLogger().setLevel(logging.DEBUG)

    # 环境检查
    if not setup_environment():
        sys.exit(1)

    # 加载Schema
    try:
        schema_mgr = load_schema(args.schema, args.schema_meta)
    except Exception as e:
        logger.error(f"Schema加载失败: {e}")
        sys.exit(1)

    # 创建Orchestrator
    try:
        orchestrator = create_orchestrator(schema_mgr, args)
    except Exception as e:
        logger.error(f"Orchestrator创建失败: {e}")
        sys.exit(1)

    interactive_mode(orchestrator, args.dialect)


if __name__ == "__main__":
    main()