# -*- coding: utf-8 -*-
"""
回填脚本：dws_coach_area_hours

对已有月份批量从 DWD 服务记录聚合助教区域课时，写入 dws_coach_area_hours。

用法：
    cd C:\\Project\\NeoZQYY
    uv run python scripts/ops/backfill_coach_area_hours.py \\
        --site-id 2790685415443269 --start-month 2025-07-01 --end-month 2026-03-01
"""
from __future__ import annotations

import argparse
import logging
import os
import sys
from datetime import date, timedelta
from decimal import Decimal

# ── 环境初始化 ──
_ROOT = os.path.dirname(os.path.dirname(os.path.dirname(os.path.abspath(__file__))))
sys.path.insert(0, _ROOT)

from dotenv import load_dotenv
load_dotenv(os.path.join(_ROOT, ".env"))

import psycopg2
import psycopg2.extras

from neozqyy_shared.area_mapping import resolve_area_code

logging.basicConfig(level=logging.INFO, format="%(asctime)s [%(levelname)s] %(message)s")
logger = logging.getLogger("backfill_coach_area_hours")

# ── 导入 ETL 纯函数（stub 模式） ──
import importlib.util as _ilu
import types as _types

_ETL_ROOT = os.path.join(_ROOT, "apps", "etl", "connectors", "feiqiu")

_tasks_pkg = _types.ModuleType("tasks")
_tasks_pkg.__path__ = [os.path.join(_ETL_ROOT, "tasks")]
_dws_pkg = _types.ModuleType("tasks.dws")
_dws_pkg.__path__ = [os.path.join(_ETL_ROOT, "tasks", "dws")]
sys.modules.setdefault("tasks", _tasks_pkg)
sys.modules.setdefault("tasks.dws", _dws_pkg)
_base_stub = _types.ModuleType("tasks.dws.base_dws_task")
_base_stub.TaskContext = type("TaskContext", (), {})
_base_stub.BaseDwsTask = type("BaseDwsTask", (), {})
sys.modules["tasks.dws.base_dws_task"] = _base_stub

_mod_path = os.path.join(_ETL_ROOT, "tasks", "dws", "coach_area_hours_task.py")
_spec = _ilu.spec_from_file_location("tasks.dws.coach_area_hours_task", _mod_path)
_mod = _ilu.module_from_spec(_spec)
_mod.__package__ = "tasks.dws"
sys.modules["tasks.dws.coach_area_hours_task"] = _mod
_spec.loader.exec_module(_mod)
transform_coach_area_hours = _mod.transform_coach_area_hours


# ── 数据提取 ──

def extract_service_records(conn, site_id: int, stat_month: date) -> list[dict]:
    """从 DWD 提取指定月份的服务记录"""
    if stat_month.month == 12:
        next_month = stat_month.replace(year=stat_month.year + 1, month=1)
    else:
        next_month = stat_month.replace(month=stat_month.month + 1)

    sql = """
        SELECT
            s.site_assistant_id AS assistant_id,
            dt.site_table_area_name AS area_name,
            s.skill_name,
            s.income_seconds,
            COALESCE(ex.is_trash, 0) AS is_trash
        FROM dwd.dwd_assistant_service_log s
        LEFT JOIN dwd.dwd_assistant_service_log_ex ex
            ON s.assistant_service_id = ex.assistant_service_id
        LEFT JOIN dwd.dim_table dt
            ON s.site_table_id = dt.table_id
            AND dt.scd2_is_current = 1
        WHERE s.site_id = %s
          AND s.is_delete = 0
          AND DATE(s.start_use_time) >= %s
          AND DATE(s.start_use_time) < %s
    """
    with conn.cursor(cursor_factory=psycopg2.extras.RealDictCursor) as cur:
        cur.execute(sql, (site_id, stat_month, next_month))
        return cur.fetchall()


def main():
    parser = argparse.ArgumentParser(description="回填 dws_coach_area_hours")
    parser.add_argument("--site-id", type=int, required=True)
    parser.add_argument("--start-month", type=str, required=True, help="起始月份 YYYY-MM-01")
    parser.add_argument("--end-month", type=str, required=True, help="结束月份 YYYY-MM-01")
    args = parser.parse_args()

    dsn = os.environ.get("PG_DSN")
    if not dsn:
        raise RuntimeError("PG_DSN 未设置")

    os.environ.setdefault("PGCLIENTENCODING", "UTF8")
    conn = psycopg2.connect(dsn)
    conn.autocommit = False

    site_id = args.site_id
    start = date.fromisoformat(args.start_month)
    end = date.fromisoformat(args.end_month)

    total_inserted = 0
    month = start
    month_idx = 0
    while month <= end:
        month_idx += 1
        records = extract_service_records(conn, site_id, month)

        rows = transform_coach_area_hours(
            records=records,
            stat_month=month,
            site_id=site_id,
            tenant_id=site_id,
        )

        # delete-before-insert
        with conn.cursor() as cur:
            cur.execute(
                "DELETE FROM dws.dws_coach_area_hours WHERE site_id = %s AND stat_month = %s",
                (site_id, month),
            )
            if rows:
                cols = [
                    "site_id", "tenant_id", "stat_month", "assistant_id", "area_code",
                    "base_hours", "bonus_hours", "room_hours",
                    "effective_hours", "trashed_hours",
                    "base_service_count", "bonus_service_count", "room_service_count",
                ]
                placeholders = ", ".join(["%s"] * len(cols))
                insert_sql = f"INSERT INTO dws.dws_coach_area_hours ({', '.join(cols)}) VALUES ({placeholders})"
                for row in rows:
                    cur.execute(insert_sql, tuple(row[c] for c in cols))

        conn.commit()
        total_inserted += len(rows)
        logger.info("[%d] %s → %d 行（%d 条服务记录）", month_idx, month, len(rows), len(records))

        # 下一个月
        if month.month == 12:
            month = month.replace(year=month.year + 1, month=1)
        else:
            month = month.replace(month=month.month + 1)

    logger.info("=== 回填完成：共 %d 行 ===", total_inserted)
    conn.close()


if __name__ == "__main__":
    main()