#!/usr/bin/env python3
import argparse
import subprocess
import sys


def _sql_escape(value: str) -> str:
    return value.replace("'", "''")


def build_sql(
    product_no: str,
    province: str,
    city: str,
    district: str,
    days: int,
    warehouse_transfer_fee: float,
    depreciation_rate: float,
    limit: int,
) -> str:
    pno = _sql_escape(product_no.strip())
    prov = _sql_escape(province.strip())
    city_v = _sql_escape((city or "").strip())
    dist_v = _sql_escape((district or "").strip())
    wh_fee = f"{warehouse_transfer_fee:.2f}"
    dep_rate = f"{depreciation_rate:.4f}"
    return f"""
USE [JSDataMiddlePlatform];
SET NOCOUNT ON;

DECLARE @product_no nvarchar(120) = N'{pno}';
DECLARE @province nvarchar(50) = N'{prov}';
DECLARE @city nvarchar(50) = N'{city_v}';
DECLARE @district nvarchar(50) = N'{dist_v}';
DECLARE @days int = {days};
DECLARE @limit int = {limit};
DECLARE @warehouse_transfer_fee decimal(18,2) = {wh_fee};
DECLARE @depreciation_rate decimal(10,4) = {dep_rate};
DECLARE @start_time datetime2 = DATEADD(day, -@days, GETDATE());
DECLARE @end_time datetime2 = GETDATE();

DECLARE @province_norm nvarchar(50) =
    REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(ISNULL(@province, ''), '省', ''), '市', ''), '壮族自治区', ''), '回族自治区', ''), '维吾尔自治区', ''), '自治区', ''), '特别行政区', ''), '地区', ''), ' ', '');
DECLARE @city_norm nvarchar(50) =
    REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(ISNULL(@city, ''), '省', ''), '市', ''), '壮族自治区', ''), '回族自治区', ''), '维吾尔自治区', ''), '自治区', ''), '特别行政区', ''), '地区', ''), ' ', '');
DECLARE @district_norm nvarchar(50) =
    REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(ISNULL(@district, ''), '省', ''), '市', ''), '壮族自治区', ''), '回族自治区', ''), '维吾尔自治区', ''), '自治区', ''), '特别行政区', ''), '地区', ''), ' ', '');

IF OBJECT_ID('tempdb..#sku_pool') IS NOT NULL
    DROP TABLE #sku_pool;

SELECT DISTINCT
    s.sku_id,
    s.name AS sku_name,
    s.other_7 AS product_no,
    s.i_id AS style_code,
    s.other_1 AS spu
INTO #sku_pool
FROM dbo.jst_sku AS s WITH (NOLOCK)
WHERE ISNULL(NULLIF(s.sku_id, ''), '') <> ''
  AND (
      NULLIF(s.other_7, '') = @product_no
      OR NULLIF(s.i_id, '') = @product_no
      OR NULLIF(s.other_1, '') = @product_no
      OR NULLIF(s.sku_id, '') = @product_no
      OR NULLIF(s.other_7, '') LIKE @product_no + '%'
  );

INSERT INTO #sku_pool (sku_id, sku_name, product_no, style_code, spu)
SELECT DISTINCT
    NULLIF(a.undefined10, '') AS sku_id,
    NULLIF(a.undefined36, '') AS sku_name,
    NULLIF(a.undefined96, '') AS product_no,
    NULL,
    NULL
FROM dbo.jst_goods_profit_kpi_items_afs AS a WITH (NOLOCK)
LEFT JOIN #sku_pool AS p
    ON p.sku_id = NULLIF(a.undefined10, '')
WHERE p.sku_id IS NULL
  AND ISNULL(NULLIF(a.undefined10, ''), '') <> ''
  AND (
      NULLIF(a.undefined96, '') = @product_no
      OR NULLIF(a.undefined96, '') LIKE @product_no + '%'
  );

IF OBJECT_ID('tempdb..#order_base') IS NOT NULL
    DROP TABLE #order_base;

SELECT
    NULLIF(a.undefined2, '') AS order_id,
    NULLIF(a.undefined10, '') AS sku_id,
    COALESCE(NULLIF(s.other_7, ''), NULLIF(a.undefined96, ''), @product_no) AS product_no,
    ISNULL(NULLIF(a.undefined8, ''), 'unknown') AS shop_name,
    ISNULL(NULLIF(a.undefined73, ''), ISNULL(NULLIF(e.logistic_company_name, ''), '未标注')) AS express_company,
    COALESCE(NULLIF(a.undefined66, ''), NULLIF(s.other_3, ''), '未标注') AS ship_warehouse_name,
    ISNULL(NULLIF(a.undefined74, ''), '') AS province_raw,
    ISNULL(NULLIF(a.undefined75, ''), '') AS city_raw,
    ISNULL(NULLIF(e.receiver_address, ''), '') AS receiver_address,
    REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(ISNULL(NULLIF(a.undefined74, ''), ''), '省', ''), '市', ''), '壮族自治区', ''), '回族自治区', ''), '维吾尔自治区', ''), '自治区', ''), '特别行政区', ''), '地区', ''), ' ', '') AS province_norm,
    REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(ISNULL(NULLIF(a.undefined75, ''), ''), '省', ''), '市', ''), '壮族自治区', ''), '回族自治区', ''), '维吾尔自治区', ''), '自治区', ''), '特别行政区', ''), '地区', ''), ' ', '') AS city_norm,
    REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(ISNULL(NULLIF(e.receiver_address, ''), ''), '省', ''), '市', ''), '壮族自治区', ''), '回族自治区', ''), '维吾尔自治区', ''), '自治区', ''), '特别行政区', ''), '地区', ''), ' ', '') AS receiver_address_norm,
    COALESCE(
        TRY_CONVERT(datetime2, NULLIF(a.undefined6, ''), 120),
        TRY_CONVERT(datetime2, REPLACE(NULLIF(a.undefined6, ''), '/', '-'), 120),
        TRY_CONVERT(datetime2, NULLIF(a.undefined6, ''), 111),
        TRY_CONVERT(datetime2, NULLIF(e.send_time, ''), 120),
        TRY_CONVERT(datetime2, a.createdAt)
    ) AS ship_dt,
    COALESCE(
        TRY_CONVERT(decimal(18, 2), NULLIF(a.undefined29, '')),
        TRY_CONVERT(decimal(18, 2), NULLIF(a.undefined26, '')),
        TRY_CONVERT(decimal(18, 2), NULLIF(a.undefined21, '')),
        CAST(0 AS decimal(18, 2))
    ) AS sale_amount,
    COALESCE(
        TRY_CONVERT(decimal(18, 2), NULLIF(a.undefined31, '')),
        TRY_CONVERT(decimal(18, 2), NULLIF(a.undefined22, '')),
        CAST(0 AS decimal(18, 2))
    ) AS cost_amount,
    COALESCE(
        TRY_CONVERT(decimal(18, 2), NULLIF(a.undefined30, '')),
        TRY_CONVERT(decimal(18, 2), NULLIF(a.undefined20, '')),
        CAST(0 AS decimal(18, 2))
    ) AS shipped_qty,
    COALESCE(
        TRY_CONVERT(decimal(18, 2), NULLIF(a.undefined40, '')),
        CAST(0 AS decimal(18, 2))
    )
    + COALESCE(
        TRY_CONVERT(decimal(18, 2), NULLIF(a.undefined49, '')),
        CAST(0 AS decimal(18, 2))
    ) AS return_qty,
    COALESCE(
        TRY_CONVERT(decimal(18, 2), NULLIF(a.undefined90, '')),
        CAST(0 AS decimal(18, 2))
    ) AS return_freight_fee,
    COALESCE(
        TRY_CONVERT(decimal(18, 2), NULLIF(a.undefined79, '')),
        CAST(0 AS decimal(18, 2))
    ) AS warehouse_transfer_fee_obs
INTO #order_base
FROM dbo.jst_goods_profit_kpi_items_afs AS a WITH (NOLOCK)
INNER JOIN #sku_pool AS p
    ON p.sku_id = NULLIF(a.undefined10, '')
LEFT JOIN dbo.jst_sku AS s WITH (NOLOCK)
    ON s.sku_id = NULLIF(a.undefined10, '')
LEFT JOIN dbo.jst_order_express_details AS e WITH (NOLOCK)
    ON NULLIF(e.so_id, '') = NULLIF(a.undefined2, '')
WHERE ISNULL(NULLIF(a.undefined2, ''), '') <> ''
  AND ISNULL(NULLIF(a.undefined62, ''), '') NOT LIKE '%配件%'
  AND ISNULL(NULLIF(a.undefined62, ''), '') NOT LIKE '%特殊单%'
  AND a.createdAt >= DATEADD(day, -(@days + 7), GETDATE());

IF OBJECT_ID('tempdb..#region_line') IS NOT NULL
    DROP TABLE #region_line;

SELECT
    ob.*
INTO #region_line
FROM #order_base AS ob
WHERE ob.ship_dt >= @start_time
  AND ob.ship_dt < @end_time
  AND (
      (@province_norm = '' AND ISNULL(NULLIF(ob.province_norm, ''), '') <> '')
      OR ob.province_norm LIKE '%' + @province_norm + '%'
      OR @province_norm LIKE '%' + ob.province_norm + '%'
      OR ob.receiver_address_norm LIKE '%' + @province_norm + '%'
  )
  AND (
      @city_norm = ''
      OR ob.city_norm LIKE '%' + @city_norm + '%'
      OR @city_norm LIKE '%' + ob.city_norm + '%'
      OR ob.receiver_address_norm LIKE '%' + @city_norm + '%'
  )
  AND (
      @district_norm = ''
      OR ob.receiver_address LIKE '%' + @district + '%'
      OR ob.receiver_address_norm LIKE '%' + @district_norm + '%'
  );

IF OBJECT_ID('tempdb..#order_agg') IS NOT NULL
    DROP TABLE #order_agg;

SELECT
    rl.order_id,
    MAX(rl.shop_name) AS shop_name,
    MAX(rl.product_no) AS product_no,
    MAX(rl.ship_dt) AS ship_dt,
    SUM(ISNULL(rl.sale_amount, 0)) AS sale_amount_order,
    SUM(ISNULL(rl.cost_amount, 0)) AS cost_amount_order,
    SUM(ISNULL(rl.shipped_qty, 0)) AS shipped_qty_order,
    SUM(ISNULL(rl.return_qty, 0)) AS return_qty_order,
    SUM(ISNULL(rl.return_freight_fee, 0)) AS return_freight_fee_order,
    SUM(ISNULL(rl.warehouse_transfer_fee_obs, 0)) AS warehouse_transfer_fee_order
INTO #order_agg
FROM #region_line AS rl
GROUP BY rl.order_id;

IF OBJECT_ID('tempdb..#freight_order') IS NOT NULL
    DROP TABLE #freight_order;

SELECT
    NULLIF(f.so_id, '') AS order_id,
    SUM(COALESCE(TRY_CONVERT(decimal(18, 2), f.freightCost), 0)) AS outbound_freight_order
INTO #freight_order
FROM dbo.fys_jstFreightCostDetail AS f WITH (NOLOCK)
INNER JOIN #region_line AS rl
    ON rl.order_id = NULLIF(f.so_id, '')
   AND rl.sku_id = NULLIF(f.sku_id, '')
WHERE f.send_date >= @start_time
  AND f.send_date < @end_time
GROUP BY NULLIF(f.so_id, '');

IF OBJECT_ID('tempdb..#order_fact') IS NOT NULL
    DROP TABLE #order_fact;

SELECT
    oa.order_id,
    oa.shop_name,
    oa.product_no,
    oa.ship_dt,
    oa.sale_amount_order,
    oa.cost_amount_order,
    oa.shipped_qty_order,
    oa.return_qty_order,
    oa.return_freight_fee_order,
    oa.warehouse_transfer_fee_order,
    COALESCE(fo.outbound_freight_order, 0) AS outbound_freight_order
INTO #order_fact
FROM #order_agg AS oa
LEFT JOIN #freight_order AS fo
    ON fo.order_id = oa.order_id;

IF OBJECT_ID('tempdb..#kpi') IS NOT NULL
    DROP TABLE #kpi;

SELECT
    COUNT(*) AS sample_order_count,
    SUM(ISNULL(ofa.shipped_qty_order, 0)) AS shipped_qty_sum,
    SUM(ISNULL(ofa.return_qty_order, 0)) AS return_qty_sum,
    SUM(ISNULL(ofa.sale_amount_order, 0)) AS sale_amount_sum,
    SUM(ISNULL(ofa.cost_amount_order, 0)) AS cost_amount_sum,
    AVG(NULLIF(ISNULL(ofa.outbound_freight_order, 0), 0)) AS avg_outbound_freight_nonzero,
    AVG(ISNULL(ofa.outbound_freight_order, 0)) AS avg_outbound_freight_per_order,
    AVG(NULLIF(ISNULL(ofa.return_freight_fee_order, 0), 0)) AS avg_return_freight_observed,
    AVG(NULLIF(ISNULL(ofa.warehouse_transfer_fee_order, 0), 0)) AS avg_warehouse_transfer_observed,
    MIN(ofa.ship_dt) AS first_ship_time,
    MAX(ofa.ship_dt) AS last_ship_time
INTO #kpi
FROM #order_fact AS ofa;

-- 1) 样本概览
SELECT
    @product_no AS input_product_no,
    @province AS input_province,
    @city AS input_city,
    @district AS input_district,
    @days AS lookback_days,
    (SELECT COUNT(*) FROM #sku_pool) AS matched_sku_count,
    k.sample_order_count,
    k.shipped_qty_sum,
    k.return_qty_sum,
    CASE WHEN ISNULL(k.shipped_qty_sum, 0) = 0 THEN NULL ELSE CAST(k.return_qty_sum / NULLIF(k.shipped_qty_sum, 0) AS decimal(10,4)) END AS return_rate,
    k.first_ship_time,
    k.last_ship_time
FROM #kpi AS k;

-- 2) 利润估算因子（按订单均值）
SELECT
    CAST(CASE WHEN k.sample_order_count = 0 THEN NULL ELSE k.sale_amount_sum / NULLIF(k.sample_order_count, 0) END AS decimal(18,2)) AS avg_sale_amount_per_order,
    CAST(CASE WHEN k.sample_order_count = 0 THEN NULL ELSE k.cost_amount_sum / NULLIF(k.sample_order_count, 0) END AS decimal(18,2)) AS avg_cost_amount_per_order,
    CAST(ISNULL(k.avg_outbound_freight_per_order, 0) AS decimal(18,2)) AS est_outbound_freight_per_order_15d,
    CAST(
        COALESCE(
            k.avg_return_freight_observed,
            ISNULL(k.avg_outbound_freight_per_order, 0)
            * CASE WHEN ISNULL(k.shipped_qty_sum, 0) = 0 THEN 0 ELSE k.return_qty_sum / NULLIF(k.shipped_qty_sum, 0) END,
            0
        ) AS decimal(18,2)
    ) AS est_return_freight_per_order_15d,
    CAST(COALESCE(k.avg_warehouse_transfer_observed, @warehouse_transfer_fee, 0) AS decimal(18,2)) AS warehouse_transfer_fee_used,
    CAST(
        CASE WHEN k.sample_order_count = 0 THEN NULL ELSE
            (k.sale_amount_sum / NULLIF(k.sample_order_count, 0))
            - (k.cost_amount_sum / NULLIF(k.sample_order_count, 0))
            - ISNULL(k.avg_outbound_freight_per_order, 0)
            - COALESCE(
                k.avg_return_freight_observed,
                ISNULL(k.avg_outbound_freight_per_order, 0)
                * CASE WHEN ISNULL(k.shipped_qty_sum, 0) = 0 THEN 0 ELSE k.return_qty_sum / NULLIF(k.shipped_qty_sum, 0) END,
                0
            )
            - COALESCE(k.avg_warehouse_transfer_observed, @warehouse_transfer_fee, 0)
        END AS decimal(18,2)
    ) AS est_profit_per_order,
    CAST(
        CASE WHEN k.sample_order_count = 0 THEN NULL
             WHEN (k.sale_amount_sum / NULLIF(k.sample_order_count, 0)) = 0 THEN NULL
             ELSE (
                (
                    (k.sale_amount_sum / NULLIF(k.sample_order_count, 0))
                    - (k.cost_amount_sum / NULLIF(k.sample_order_count, 0))
                    - ISNULL(k.avg_outbound_freight_per_order, 0)
                    - COALESCE(
                        k.avg_return_freight_observed,
                        ISNULL(k.avg_outbound_freight_per_order, 0)
                        * CASE WHEN ISNULL(k.shipped_qty_sum, 0) = 0 THEN 0 ELSE k.return_qty_sum / NULLIF(k.shipped_qty_sum, 0) END,
                        0
                    )
                    - COALESCE(k.avg_warehouse_transfer_observed, @warehouse_transfer_fee, 0)
                )
                / NULLIF((k.sale_amount_sum / NULLIF(k.sample_order_count, 0)), 0)
             )
        END AS decimal(10,4)
    ) AS est_profit_margin
FROM #kpi AS k;

-- 3) 处置建议（退货/补偿/放货，含退回折旧损失）
WITH decision_base AS (
    SELECT
        k.sample_order_count,
        CAST(CASE WHEN k.sample_order_count = 0 THEN NULL ELSE k.sale_amount_sum / NULLIF(k.sample_order_count, 0) END AS decimal(18,2)) AS avg_sale,
        CAST(CASE WHEN k.sample_order_count = 0 THEN NULL ELSE k.cost_amount_sum / NULLIF(k.sample_order_count, 0) END AS decimal(18,2)) AS avg_cost,
        CAST(ISNULL(k.avg_outbound_freight_per_order, 0) AS decimal(18,2)) AS avg_outbound,
        CAST(COALESCE(
            k.avg_return_freight_observed,
            ISNULL(k.avg_outbound_freight_per_order, 0) * CASE WHEN ISNULL(k.shipped_qty_sum, 0) = 0 THEN 0 ELSE k.return_qty_sum / NULLIF(k.shipped_qty_sum, 0) END,
            0
        ) AS decimal(18,2)) AS est_return_freight,
        CAST(COALESCE(k.avg_warehouse_transfer_observed, @warehouse_transfer_fee, 0) AS decimal(18,2)) AS warehouse_transfer
    FROM #kpi AS k
),
calc AS (
    SELECT
        db.*,
        CAST(ISNULL(db.avg_cost, 0) * @depreciation_rate AS decimal(18,2)) AS depreciation_loss_if_return,
        CAST((ISNULL(db.avg_outbound, 0) + ISNULL(db.est_return_freight, 0) + ISNULL(db.warehouse_transfer, 0) + (ISNULL(db.avg_cost, 0) * @depreciation_rate)) AS decimal(18,2)) AS expected_loss_if_return,
        CAST((ISNULL(db.avg_sale, 0) - ISNULL(db.avg_cost, 0) - ISNULL(db.avg_outbound, 0)) AS decimal(18,2)) AS keep_order_net_before_comp,
        CAST((0 - ISNULL(db.avg_outbound, 0) - ISNULL(db.est_return_freight, 0) - ISNULL(db.warehouse_transfer, 0) - (ISNULL(db.avg_cost, 0) * @depreciation_rate)) AS decimal(18,2)) AS option_return_net_profit,
        CAST((0 - ISNULL(db.avg_cost, 0) - ISNULL(db.avg_outbound, 0)) AS decimal(18,2)) AS option_release_net_profit
    FROM decision_base AS db
),
range_calc AS (
    SELECT
        c.*,
        CAST(
            CASE
                WHEN c.sample_order_count = 0 THEN 0
                WHEN c.keep_order_net_before_comp <= 0 THEN 0
                ELSE
                    CASE
                        WHEN (c.keep_order_net_before_comp * 0.70) < (c.expected_loss_if_return * 0.90) THEN (c.keep_order_net_before_comp * 0.70)
                        ELSE (c.expected_loss_if_return * 0.90)
                    END
            END
            AS decimal(18,2)
        ) AS comp_high_raw
    FROM calc AS c
)
SELECT
    rc.sample_order_count,
    rc.keep_order_net_before_comp AS est_profit_per_order,
    CAST(@depreciation_rate AS decimal(10,4)) AS depreciation_rate_used,
    rc.depreciation_loss_if_return,
    rc.expected_loss_if_return,
    CAST(
        CASE
            WHEN rc.sample_order_count = 0 THEN 0
            WHEN rc.comp_high_raw <= 0 THEN 0
            ELSE rc.comp_high_raw * 0.50
        END AS decimal(18,2)
    ) AS compensation_low,
    CAST(
        CASE
            WHEN rc.sample_order_count = 0 THEN 0
            WHEN rc.comp_high_raw <= 0 THEN 0
            ELSE rc.comp_high_raw
        END AS decimal(18,2)
    ) AS compensation_high,
    rc.option_return_net_profit,
    rc.option_release_net_profit,
    CAST(
        rc.keep_order_net_before_comp
        - (CASE WHEN rc.comp_high_raw <= 0 THEN 0 ELSE rc.comp_high_raw * 0.50 END)
        AS decimal(18,2)
    ) AS option_discount_net_profit_low,
    CAST(
        rc.keep_order_net_before_comp
        - (CASE WHEN rc.comp_high_raw <= 0 THEN 0 ELSE rc.comp_high_raw END)
        AS decimal(18,2)
    ) AS option_discount_net_profit_high,
    CASE
        WHEN rc.sample_order_count = 0 THEN N'样本不足'
        WHEN (
            rc.keep_order_net_before_comp
            - (CASE WHEN rc.comp_high_raw <= 0 THEN 0 ELSE rc.comp_high_raw END)
        ) >= rc.option_return_net_profit
         AND (
            rc.keep_order_net_before_comp
            - (CASE WHEN rc.comp_high_raw <= 0 THEN 0 ELSE rc.comp_high_raw END)
        ) >= rc.option_release_net_profit
            THEN N'优惠留客'
        WHEN rc.option_return_net_profit >= rc.option_release_net_profit THEN N'退回'
        ELSE N'放货'
    END AS recommended_option,
    CASE
        WHEN rc.sample_order_count = 0 THEN N'样本不足，暂不做退补决策（建议放宽省市区或延长到30天）。'
        WHEN (
            rc.keep_order_net_before_comp
            - (CASE WHEN rc.comp_high_raw <= 0 THEN 0 ELSE rc.comp_high_raw END)
        ) >= rc.option_return_net_profit
         AND (
            rc.keep_order_net_before_comp
            - (CASE WHEN rc.comp_high_raw <= 0 THEN 0 ELSE rc.comp_high_raw END)
        ) >= rc.option_release_net_profit
            THEN N'建议优先优惠留客：在建议补偿区间内，净收益优于退回和放货。'
        WHEN rc.option_return_net_profit >= rc.option_release_net_profit
            THEN N'建议优先退回：按当前折旧率和运费估算，退回净损失低于放货。'
        ELSE N'建议优先放货：退回综合损失（含20%折旧）高于放货损失。'
    END AS recommended_action,
    CASE
        WHEN rc.sample_order_count >= 30 THEN 'high'
        WHEN rc.sample_order_count >= 10 THEN 'medium'
        WHEN rc.sample_order_count > 0 THEN 'low'
        ELSE 'none'
    END AS confidence_level,
    CAST(
        CASE
            WHEN rc.sample_order_count = 0 THEN NULL
            ELSE rc.expected_loss_if_return
                 - (CASE WHEN rc.comp_high_raw <= 0 THEN 0 ELSE rc.comp_high_raw * 0.75 END)
        END AS decimal(18,2)
    ) AS est_saving_vs_return
FROM range_calc AS rc;

-- 4) 快递/仓库策略（近15天样本）
SELECT TOP (@limit)
    rl.express_company,
    COUNT(DISTINCT rl.order_id) AS order_count,
    SUM(ISNULL(rl.shipped_qty, 0)) AS shipped_qty_sum,
    CAST(
        SUM(ISNULL(rl.shipped_qty, 0))
        / NULLIF((SELECT SUM(ISNULL(shipped_qty, 0)) FROM #region_line), 0)
        AS decimal(10,4)
    ) AS shipped_qty_ratio
FROM #region_line AS rl
GROUP BY rl.express_company
ORDER BY shipped_qty_sum DESC, order_count DESC;

SELECT TOP (@limit)
    rl.ship_warehouse_name,
    COUNT(DISTINCT rl.order_id) AS order_count,
    SUM(ISNULL(rl.shipped_qty, 0)) AS shipped_qty_sum,
    CAST(
        SUM(ISNULL(rl.shipped_qty, 0))
        / NULLIF((SELECT SUM(ISNULL(shipped_qty, 0)) FROM #region_line), 0)
        AS decimal(10,4)
    ) AS shipped_qty_ratio
FROM #region_line AS rl
GROUP BY rl.ship_warehouse_name
ORDER BY shipped_qty_sum DESC, order_count DESC;
"""


def main() -> int:
    parser = argparse.ArgumentParser(
        description="Estimate profit-based aftersale decision (退回/优惠/放货) by product_no + region, including return depreciation loss"
    )
    parser.add_argument("--product-no", required=True, help="商品货号（product_no/style_code/spu/SKU）")
    parser.add_argument("--province", required=True, help="省份")
    parser.add_argument("--city", default="", help="城市（可选）")
    parser.add_argument("--district", default="", help="区县（可选）")
    parser.add_argument("--days", type=int, default=15, help="lookback window, default 15")
    parser.add_argument("--warehouse-transfer-fee", type=float, default=0.0, help="仓储转运费兜底值（当样本无观测值时使用）")
    parser.add_argument("--depreciation-rate", type=float, default=0.20, help="退回折旧损失率，默认0.20（20%%）")
    parser.add_argument("--limit", type=int, default=10, help="max rows for strategy result sets")
    args = parser.parse_args()

    product_no = args.product_no.strip()
    province = args.province.strip()
    if not product_no:
        print("--product-no is required", file=sys.stderr)
        return 2
    if not province:
        print("--province is required", file=sys.stderr)
        return 2

    days = max(7, min(args.days, 90))
    limit = max(1, min(args.limit, 100))
    depreciation_rate = max(0.0, min(args.depreciation_rate, 1.0))

    sql = build_sql(
        product_no=product_no,
        province=province,
        city=args.city,
        district=args.district,
        days=days,
        warehouse_transfer_fee=args.warehouse_transfer_fee,
        depreciation_rate=depreciation_rate,
        limit=limit,
    )
    cmd = ["company-db", "query", "--sql", sql]
    proc = subprocess.run(cmd, capture_output=True, text=True)
    if proc.returncode != 0:
        err = (proc.stderr or proc.stdout or "company-db failed").strip()
        print(err, file=sys.stderr)
        return proc.returncode

    print(proc.stdout.rstrip())
    return 0


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