#!/usr/bin/env python
# -*- coding: utf-8 -*-
"""DWS 层扩展验证脚本 — 影子跑数验证。

对照 Requirements 9.1–9.4 验证三个 DWS 表的结构完整性和数据合理性：
  1. dws_assistant_order_contribution — 四项统计一致性
  2. dws_member_consumption_summary   — 充值窗口字段
  3. dws_assistant_daily_detail       — 定档折算惩罚字段
  4. RLS 视图 + FDW 外部表存在性

用法:
    cd apps/etl/connectors/feiqiu
    python scripts/verify_dws_extensions.py
"""

from __future__ import annotations

import os
import sys
from pathlib import Path

from dotenv import load_dotenv

# ---------------------------------------------------------------------------
# 1. 加载根 .env（遵循 testing-env.md 规范）
# ---------------------------------------------------------------------------
_ROOT = Path(__file__).resolve().parents[5]  # scripts/ → feiqiu/ → connectors/ → etl/ → apps/ → 根目录
load_dotenv(_ROOT / ".env")

PG_DSN = os.environ.get("PG_DSN")
if not PG_DSN:
    raise RuntimeError("PG_DSN 未设置，请检查 .env 配置")

APP_DB_DSN = os.environ.get("APP_DB_DSN")
if not APP_DB_DSN:
    raise RuntimeError("APP_DB_DSN 未设置，请检查 .env 配置")

# ---------------------------------------------------------------------------
# 2. 数据库连接
# ---------------------------------------------------------------------------
try:
    import psycopg2
except ImportError:
    print("ERROR: psycopg2 未安装，请执行 uv pip install psycopg2-binary")
    sys.exit(1)


# ---------------------------------------------------------------------------
# 辅助函数
# ---------------------------------------------------------------------------

class _Result:
    """单条验证结果。"""

    def __init__(self, name: str):
        self.name = name
        self.passed = True
        self.details: list[str] = []

    def fail(self, msg: str) -> None:
        self.passed = False
        self.details.append(f"  FAIL: {msg}")

    def ok(self, msg: str) -> None:
        self.details.append(f"  OK:   {msg}")

    def __str__(self) -> str:
        status = "PASS" if self.passed else "FAIL"
        header = f"[{status}] {self.name}"
        if self.details:
            return header + "\n" + "\n".join(self.details)
        return header


def _query(conn, sql: str, params=None) -> list[tuple]:
    with conn.cursor() as cur:
        cur.execute(sql, params)
        return cur.fetchall()


def _query_one(conn, sql: str, params=None):
    rows = _query(conn, sql, params)
    return rows[0] if rows else None


def _column_exists(conn, schema: str, table: str, column: str) -> bool:
    row = _query_one(
        conn,
        """
        SELECT 1 FROM information_schema.columns
        WHERE table_schema = %s AND table_name = %s AND column_name = %s
        """,
        (schema, table, column),
    )
    return row is not None


def _table_exists(conn, schema: str, table: str) -> bool:
    row = _query_one(
        conn,
        """
        SELECT 1 FROM information_schema.tables
        WHERE table_schema = %s AND table_name = %s
        """,
        (schema, table),
    )
    return row is not None


# ---------------------------------------------------------------------------
# 验证 1：dws_assistant_order_contribution 四项统计（Req 9.1, 9.2）
# ---------------------------------------------------------------------------

def verify_contribution_table(conn) -> _Result:
    r = _Result("验证 1：dws_assistant_order_contribution 表结构与数据")

    # 1a. 表存在
    if not _table_exists(conn, "dws", "dws_assistant_order_contribution"):
        r.fail("表 dws.dws_assistant_order_contribution 不存在")
        return r
    r.ok("表存在")

    # 1b. 关键字段存在
    required_cols = [
        "contribution_id", "site_id", "tenant_id", "assistant_id",
        "assistant_nickname", "stat_date",
        "order_gross_revenue", "order_net_revenue",
        "time_weighted_revenue", "time_weighted_net_revenue",
        "order_count", "total_service_seconds",
        "created_at", "updated_at",
    ]
    missing = [c for c in required_cols
               if not _column_exists(conn, "dws", "dws_assistant_order_contribution", c)]
    if missing:
        r.fail(f"缺少字段: {', '.join(missing)}")
    else:
        r.ok(f"全部 {len(required_cols)} 个字段存在")

    # 1c. 唯一索引存在
    idx_row = _query_one(
        conn,
        """
        SELECT indexname FROM pg_indexes
        WHERE schemaname = 'dws'
          AND tablename = 'dws_assistant_order_contribution'
          AND indexname = 'idx_aoc_site_assistant_date'
        """,
    )
    if idx_row:
        r.ok("唯一索引 idx_aoc_site_assistant_date 存在")
    else:
        r.fail("唯一索引 idx_aoc_site_assistant_date 不存在")

    # 1d. 数据行数（信息性，不判 FAIL）
    row = _query_one(conn, "SELECT COUNT(*) FROM dws.dws_assistant_order_contribution")
    count = row[0] if row else 0
    r.ok(f"当前数据行数: {count}")

    # 1e. 如果有数据，检查四项统计非负
    if count > 0:
        neg_row = _query_one(
            conn,
            """
            SELECT COUNT(*) FROM dws.dws_assistant_order_contribution
            WHERE order_gross_revenue < 0
               OR order_net_revenue < 0
               OR time_weighted_revenue < 0
               OR time_weighted_net_revenue < 0
            """,
        )
        neg_count = neg_row[0] if neg_row else 0
        if neg_count > 0:
            r.fail(f"存在 {neg_count} 条四项统计为负值的记录")
        else:
            r.ok("四项统计数值均非负")

    return r


# ---------------------------------------------------------------------------
# 验证 2：dws_member_consumption_summary 充值窗口字段（Req 9.3）
# ---------------------------------------------------------------------------

def verify_consumption_fields(conn) -> _Result:
    r = _Result("验证 2：dws_member_consumption_summary 充值窗口字段")

    if not _table_exists(conn, "dws", "dws_member_consumption_summary"):
        r.fail("表 dws.dws_member_consumption_summary 不存在")
        return r
    r.ok("表存在")

    new_cols = [
        "recharge_count_30d", "recharge_count_60d", "recharge_count_90d",
        "recharge_amount_30d", "recharge_amount_60d", "recharge_amount_90d",
        "avg_ticket_amount",
    ]
    missing = [c for c in new_cols
               if not _column_exists(conn, "dws", "dws_member_consumption_summary", c)]
    if missing:
        r.fail(f"缺少新增字段: {', '.join(missing)}")
    else:
        r.ok(f"全部 {len(new_cols)} 个新增字段存在")

    # 如果有数据，检查充值金额和次均消费非负
    row = _query_one(conn, "SELECT COUNT(*) FROM dws.dws_member_consumption_summary")
    count = row[0] if row else 0
    r.ok(f"当前数据行数: {count}")

    if count > 0:
        neg_row = _query_one(
            conn,
            """
            SELECT COUNT(*) FROM dws.dws_member_consumption_summary
            WHERE recharge_amount_30d < 0
               OR recharge_amount_60d < 0
               OR recharge_amount_90d < 0
               OR avg_ticket_amount < 0
            """,
        )
        neg_count = neg_row[0] if neg_row else 0
        if neg_count > 0:
            r.fail(f"存在 {neg_count} 条充值金额或次均消费为负值的记录")
        else:
            r.ok("充值金额和次均消费均非负")

    return r


# ---------------------------------------------------------------------------
# 验证 3：dws_assistant_daily_detail 惩罚字段（Req 9.4）
# ---------------------------------------------------------------------------

def verify_penalty_fields(conn) -> _Result:
    r = _Result("验证 3：dws_assistant_daily_detail 惩罚字段")

    if not _table_exists(conn, "dws", "dws_assistant_daily_detail"):
        r.fail("表 dws.dws_assistant_daily_detail 不存在")
        return r
    r.ok("表存在")

    new_cols = ["penalty_minutes", "penalty_reason", "is_exempt", "per_hour_contribution"]
    missing = [c for c in new_cols
               if not _column_exists(conn, "dws", "dws_assistant_daily_detail", c)]
    if missing:
        r.fail(f"缺少新增字段: {', '.join(missing)}")
    else:
        r.ok(f"全部 {len(new_cols)} 个惩罚字段存在")

    # 检查 is_exempt 字段类型为 boolean
    type_row = _query_one(
        conn,
        """
        SELECT data_type FROM information_schema.columns
        WHERE table_schema = 'dws'
          AND table_name = 'dws_assistant_daily_detail'
          AND column_name = 'is_exempt'
        """,
    )
    if type_row and type_row[0] == "boolean":
        r.ok("is_exempt 字段类型为 boolean")
    elif type_row:
        r.fail(f"is_exempt 字段类型为 {type_row[0]}，预期 boolean")

    # 如果有数据，检查 penalty_minutes >= 0
    row = _query_one(conn, "SELECT COUNT(*) FROM dws.dws_assistant_daily_detail")
    count = row[0] if row else 0
    r.ok(f"当前数据行数: {count}")

    if count > 0:
        neg_row = _query_one(
            conn,
            """
            SELECT COUNT(*) FROM dws.dws_assistant_daily_detail
            WHERE penalty_minutes < 0
            """,
        )
        neg_count = neg_row[0] if neg_row else 0
        if neg_count > 0:
            r.fail(f"存在 {neg_count} 条 penalty_minutes 为负值的记录")
        else:
            r.ok("penalty_minutes 均非负")

    return r


# ---------------------------------------------------------------------------
# 验证 4：RLS 视图和 FDW 映射（Req 7, 8）
# ---------------------------------------------------------------------------

def verify_rls_views(conn_etl) -> _Result:
    r = _Result("验证 4a：RLS 视图存在性（ETL 库 app schema）")

    views = [
        "v_dws_assistant_order_contribution",
        "v_dws_member_consumption_summary",
        "v_dws_assistant_daily_detail",
    ]
    for v in views:
        if _table_exists(conn_etl, "app", v):
            r.ok(f"视图 app.{v} 存在")
        else:
            r.fail(f"视图 app.{v} 不存在")

    return r


def verify_fdw_tables(conn_app) -> _Result:
    r = _Result("验证 4b：FDW 外部表存在性（业务库 fdw_etl schema）")

    # FDW 外部表名与 RLS 视图名一致，带 v_ 前缀
    tables = [
        "v_dws_assistant_order_contribution",
        "v_dws_member_consumption_summary",
        "v_dws_assistant_daily_detail",
    ]
    for t in tables:
        row = _query_one(
            conn_app,
            """
            SELECT 1 FROM information_schema.tables
            WHERE table_schema = 'fdw_etl' AND table_name = %s
            """,
            (t,),
        )
        if row:
            r.ok(f"外部表 fdw_etl.{t} 存在")
        else:
            r.fail(f"外部表 fdw_etl.{t} 不存在")

    return r


# ---------------------------------------------------------------------------
# 主函数
# ---------------------------------------------------------------------------

def main() -> int:
    results: list[_Result] = []

    # 连接 ETL 测试库
    try:
        conn_etl = psycopg2.connect(PG_DSN)
        conn_etl.autocommit = True
    except Exception as e:
        print(f"ERROR: 无法连接 ETL 库 ({PG_DSN[:40]}...): {e}")
        return 1

    # 连接业务测试库
    try:
        conn_app = psycopg2.connect(APP_DB_DSN)
        conn_app.autocommit = True
    except Exception as e:
        print(f"ERROR: 无法连接业务库 ({APP_DB_DSN[:40]}...): {e}")
        conn_etl.close()
        return 1

    try:
        print("=" * 60)
        print("DWS 层扩展验证 — 影子跑数验证")
        print("=" * 60)
        print()

        # ETL 库验证
        results.append(verify_contribution_table(conn_etl))
        results.append(verify_consumption_fields(conn_etl))
        results.append(verify_penalty_fields(conn_etl))
        results.append(verify_rls_views(conn_etl))

        # 业务库验证
        results.append(verify_fdw_tables(conn_app))

        # 输出结果
        for r in results:
            print(r)
            print()

        # 汇总
        total = len(results)
        passed = sum(1 for r in results if r.passed)
        failed = total - passed
        print("=" * 60)
        print(f"汇总: {passed}/{total} 通过, {failed} 失败")
        print("=" * 60)

        return 0 if failed == 0 else 1

    finally:
        conn_etl.close()
        conn_app.close()


if __name__ == "__main__":
    sys.exit(main())