USE [JSDataMiddlePlatform];
SET NOCOUNT ON;

DECLARE @sku nvarchar(100) = N'CJ019317N1097V01';
DECLARE @lookback_days int = 30;
DECLARE @lead_days int = 10;
DECLARE @has_exact bit = 0;
DECLARE @start_time datetime2 = DATEADD(day, -@lookback_days, GETDATE());
DECLARE @end_time datetime2 = GETDATE();

IF EXISTS (SELECT 1 FROM dbo.jst_sku WITH (NOLOCK) WHERE sku_id = @sku)
    SET @has_exact = 1;

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

SELECT TOP (50)
    s.sku_id,
    s.name AS sku_name,
    s.i_id AS style_code,
    s.other_1 AS spu,
    s.other_7 AS product_no,
    s.cost_price,
    s.other_10 AS board_material,
    s.pic AS preview_pic_url,
    s.modified
INTO #matched_sku
FROM dbo.jst_sku AS s WITH (NOLOCK)
WHERE
    (@has_exact = 1 AND s.sku_id = @sku)
    OR (
        @has_exact = 0
        AND (
            s.sku_id = @sku
            OR s.i_id = @sku
            OR s.other_1 = @sku
            OR s.other_7 = @sku
            OR s.sku_id LIKE '%' + @sku + '%'
        )
    )
ORDER BY CASE WHEN s.sku_id = @sku THEN 0 ELSE 1 END, s.modified DESC;

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

WITH inv_rank AS (
    SELECT
        NULLIF(i.sku_id, '') AS sku_id,
        TRY_CONVERT(decimal(18, 2), i.qty) AS stock_qty,
        TRY_CONVERT(decimal(18, 2), i.order_lock) AS order_lock_qty,
        TRY_CONVERT(decimal(18, 2), i.pick_lock) AS pick_lock_qty,
        TRY_CONVERT(decimal(18, 2), i.lock_qty) AS lock_qty,
        TRY_CONVERT(decimal(18, 2), i.virtual_qty) AS virtual_qty,
        TRY_CONVERT(decimal(18, 2), i.defective_qty) AS defective_qty,
        TRY_CONVERT(decimal(18, 2), i.purchase_qty) AS purchase_qty,
        TRY_CONVERT(decimal(18, 2), i.return_qty) AS return_qty,
        TRY_CONVERT(decimal(18, 2), i.in_qty) AS in_qty,
        TRY_CONVERT(decimal(18, 2), i.min_qty) AS min_qty,
        TRY_CONVERT(decimal(18, 2), i.max_qty) AS max_qty,
        i.wms_co_id,
        i.name AS inventory_note,
        COALESCE(i.updateTime, i.modified, i.createTime) AS inventory_snapshot_time,
        ROW_NUMBER() OVER (
            PARTITION BY NULLIF(i.sku_id, '')
            ORDER BY COALESCE(i.updateTime, i.modified, i.createTime) DESC, i.Id DESC
        ) AS rn
    FROM dbo.jst_inventoryInfo AS i WITH (NOLOCK)
    WHERE NULLIF(i.sku_id, '') IN (SELECT sku_id FROM #matched_sku)
)
SELECT
    sku_id,
    stock_qty,
    order_lock_qty,
    pick_lock_qty,
    lock_qty,
    virtual_qty,
    defective_qty,
    purchase_qty,
    return_qty,
    in_qty,
    min_qty,
    max_qty,
    wms_co_id,
    inventory_note,
    inventory_snapshot_time,
    CASE
        WHEN ISNULL(stock_qty, 0) - ISNULL(order_lock_qty, 0) - ISNULL(pick_lock_qty, 0) - ISNULL(lock_qty, 0) < 0
            THEN CAST(0 AS decimal(18, 2))
        ELSE ISNULL(stock_qty, 0) - ISNULL(order_lock_qty, 0) - ISNULL(pick_lock_qty, 0) - ISNULL(lock_qty, 0)
    END AS available_qty
INTO #inv_latest
FROM inv_rank
WHERE rn = 1;

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

SELECT
    NULLIF(a.undefined10, '') AS sku_id,
    NULLIF(a.undefined2, '') AS order_id,
    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, a.createdAt)
    ) AS ship_dt,
    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
INTO #ship_base
FROM dbo.jst_goods_profit_kpi_items_afs AS a WITH (NOLOCK)
WHERE NULLIF(a.undefined10, '') IN (SELECT sku_id FROM #matched_sku)
  AND ISNULL(NULLIF(a.undefined62, ''), '') NOT LIKE '%配件%'
  AND ISNULL(NULLIF(a.undefined62, ''), '') NOT LIKE '%特殊单%';

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

SELECT
    sb.sku_id,
    CAST(sb.ship_dt AS date) AS ship_date,
    COUNT(DISTINCT sb.order_id) AS order_count,
    SUM(ISNULL(sb.shipped_qty, 0)) AS shipped_qty_sum
INTO #ship_daily
FROM #ship_base AS sb
WHERE sb.ship_dt >= @start_time
  AND sb.ship_dt < @end_time
GROUP BY sb.sku_id, CAST(sb.ship_dt AS date);

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

SELECT
    sd.sku_id,
    SUM(CASE WHEN sd.ship_date >= CAST(DATEADD(day, -7, @end_time) AS date) THEN ISNULL(sd.shipped_qty_sum, 0) ELSE 0 END) AS shipped_qty_7d,
    SUM(CASE WHEN sd.ship_date >= CAST(DATEADD(day, -30, @end_time) AS date) THEN ISNULL(sd.shipped_qty_sum, 0) ELSE 0 END) AS shipped_qty_30d,
    MAX(sd.ship_date) AS last_ship_date
INTO #ship_stats
FROM #ship_daily AS sd
GROUP BY sd.sku_id;

-- 1) SKU基础信息 + 库存快照
SELECT
    ms.sku_id,
    ms.sku_name,
    ms.style_code,
    ms.spu,
    ms.product_no,
    ms.cost_price,
    ms.board_material,
    ms.preview_pic_url,
    inv.stock_qty,
    inv.order_lock_qty,
    inv.pick_lock_qty,
    inv.lock_qty,
    inv.available_qty,
    inv.inventory_snapshot_time,
    inv.wms_co_id
FROM #matched_sku AS ms
LEFT JOIN #inv_latest AS inv
    ON inv.sku_id = ms.sku_id
ORDER BY ms.modified DESC;

-- 2) 近N天每日总发货件数
SELECT
    sd.sku_id,
    ms.sku_name,
    sd.ship_date,
    sd.order_count,
    sd.shipped_qty_sum
FROM #ship_daily AS sd
LEFT JOIN #matched_sku AS ms
    ON ms.sku_id = sd.sku_id
ORDER BY sd.ship_date DESC;

-- 3) 缺货预估与补货建议（补货安全线=10天）
SELECT
    ms.sku_id,
    ms.sku_name,
    inv.available_qty,
    ss.last_ship_date,
    CAST(ISNULL(ss.shipped_qty_7d, 0) / 7.0 AS decimal(18, 2)) AS avg_daily_shipped_7d,
    CAST(ISNULL(ss.shipped_qty_30d, 0) / 30.0 AS decimal(18, 2)) AS avg_daily_shipped_30d,
    CAST(
        CASE
            WHEN ISNULL(ss.shipped_qty_30d, 0) <= 0 THEN NULL
            ELSE inv.available_qty / NULLIF(ISNULL(ss.shipped_qty_30d, 0) / 30.0, 0)
        END AS decimal(18, 2)
    ) AS estimated_stockout_days,
    @lead_days AS replenishment_lead_days,
    CAST(
        CASE
            WHEN ISNULL(ss.shipped_qty_30d, 0) <= 0 THEN 0
            WHEN inv.available_qty >= (ISNULL(ss.shipped_qty_30d, 0) / 30.0) * @lead_days THEN 0
            ELSE ((ISNULL(ss.shipped_qty_30d, 0) / 30.0) * @lead_days) - inv.available_qty
        END AS decimal(18, 2)
    ) AS suggest_replenish_qty_to_10d,
    CASE
        WHEN inv.sku_id IS NULL THEN '无库存快照'
        WHEN ISNULL(ss.shipped_qty_30d, 0) <= 0 THEN '近30天无发货'
        WHEN inv.available_qty <= 0 THEN '缺货/可用库存<=0'
        WHEN (inv.available_qty / NULLIF(ISNULL(ss.shipped_qty_30d, 0) / 30.0, 0)) <= @lead_days THEN '补货紧急（<=10天）'
        WHEN (inv.available_qty / NULLIF(ISNULL(ss.shipped_qty_30d, 0) / 30.0, 0)) <= (@lead_days + 5) THEN '补货预警（10-15天）'
        ELSE '库存安全'
    END AS stock_risk_level
FROM #matched_sku AS ms
LEFT JOIN #inv_latest AS inv
    ON inv.sku_id = ms.sku_id
LEFT JOIN #ship_stats AS ss
    ON ss.sku_id = ms.sku_id
ORDER BY
    CASE
        WHEN inv.sku_id IS NULL THEN 9
        WHEN ISNULL(ss.shipped_qty_30d, 0) <= 0 THEN 8
        WHEN inv.available_qty <= 0 THEN 1
        WHEN (inv.available_qty / NULLIF(ISNULL(ss.shipped_qty_30d, 0) / 30.0, 0)) <= @lead_days THEN 2
        WHEN (inv.available_qty / NULLIF(ISNULL(ss.shipped_qty_30d, 0) / 30.0, 0)) <= (@lead_days + 5) THEN 3
        ELSE 4
    END,
    estimated_stockout_days ASC;