/**
 * Centralized sync and rebuild logic for the materialized `deliverysummary` table.
 *
 * Keeps `deliverysummary` in sync with manifest (delivery), manifestarticle,
 * article (track_stock), and ledger (DELIVERY transactions).
 */

const SQL_GET_DELIVERY_BY_ID_SQLITE = `
  SELECT m.id, m.company_id, m."number", m.external_number, m."date", m.created_at, m.entity_id
  FROM manifest m
  WHERE m.id = @manifestId AND m.company_id = @companyId AND m."type" = 'delivery'
`;

const SQL_GET_DELIVERY_BY_ID_MSSQL = `
  SELECT m.id, m.company_id, m.[number], m.external_number, m.[date], m.created_at, m.entity_id
  FROM manifest m
  WHERE m.id = @manifestId AND m.company_id = @companyId AND m.[type] = 'delivery'
`;

const SQL_GET_DELIVERY_BY_NUMBER_SQLITE = `
  SELECT m.id, m.company_id, m."number", m.external_number, m."date", m.created_at, m.entity_id
  FROM manifest m
  WHERE m."number" = @number AND m.company_id = @companyId AND m."type" = 'delivery'
`;

const SQL_GET_DELIVERY_BY_NUMBER_MSSQL = `
  SELECT m.id, m.company_id, m.[number], m.external_number, m.[date], m.created_at, m.entity_id
  FROM manifest m
  WHERE m.[number] = @number AND m.company_id = @companyId AND m.[type] = 'delivery'
`;

const SQL_SUPPLIER_NAME_SQLITE = `
  SELECT TRIM(COALESCE(first_name || ' ', '') || COALESCE(name, '')) AS supplier_name
  FROM entity
  WHERE id = @entityId
`;

const SQL_SUPPLIER_NAME_MSSQL = `
  SELECT LTRIM(RTRIM(ISNULL(first_name + ' ', '') + ISNULL(name, ''))) AS supplier_name
  FROM entity
  WHERE id = @entityId
`;

const SQL_DELIVERY_TOTALS_SQLITE = `
  WITH line_ledger AS (
    SELECT
      manifestarticle_id,
      SUM(amount) AS booked_amount
    FROM ledger
    WHERE warehouse_id IS NULL
      AND UPPER(transaction_type) IN ('ACCEPTANCE', 'DELIVERY', 'GOODS_RECEIPT')
    GROUP BY manifestarticle_id
  ),
  line_data AS (
    SELECT
      ma.id,
      ma.amount,
      ma.amount * (ma.net * (1.0 - ma.rebate / 100.0)) * (1.0 + ma.taxrate / 100.0) AS line_gross,
      ma.amount * (ma.net * (1.0 - ma.rebate / 100.0)) AS line_net,
      CASE WHEN COALESCE(a.track_stock, 1) = 0 THEN 0 ELSE 1 END AS track_stock,
      COALESCE(ll.booked_amount, 0) AS booked_amount
    FROM manifestarticle ma
    LEFT JOIN article a ON a.company_id = @companyId AND (a.sku = ma.sku OR EXISTS (SELECT 1 FROM articlesupplier asup WHERE asup.article_id = a.id AND asup.sku = ma.sku))
    LEFT JOIN line_ledger ll ON ll.manifestarticle_id = ma.id
    WHERE ma.manifest_id = @manifestId
  )
  SELECT
    COUNT(*) AS positions,
    COALESCE(SUM(line_gross), 0) AS gross_total,
    COALESCE(SUM(line_net), 0) AS net_total,
    COALESCE(SUM(amount), 0) AS total_quantity,
    COALESCE(SUM(CASE WHEN track_stock = 1 THEN 1 ELSE 0 END), 0) AS stock_positions,
    COALESCE(SUM(CASE WHEN track_stock = 1 AND (CASE WHEN amount > 0 THEN booked_amount >= amount ELSE booked_amount > 0 END) THEN 1 ELSE 0 END), 0) AS booked_positions,
    COALESCE(SUM(CASE WHEN track_stock = 1 THEN amount ELSE 0 END), 0) AS stock_quantity,
    COALESCE(SUM(CASE WHEN track_stock = 1 THEN booked_amount ELSE 0 END), 0) AS booked_quantity
  FROM line_data
`;

const SQL_DELIVERY_TOTALS_MSSQL = `
  WITH line_ledger AS (
    SELECT
      manifestarticle_id,
      SUM(amount) AS booked_amount
    FROM ledger
    WHERE warehouse_id IS NULL
      AND UPPER(transaction_type) IN ('ACCEPTANCE', 'DELIVERY', 'GOODS_RECEIPT')
    GROUP BY manifestarticle_id
  ),
  line_data AS (
    SELECT
      ma.id,
      ma.amount,
      ma.amount * (ma.net * (1.0 - ma.rebate / 100.0)) * (1.0 + ma.taxrate / 100.0) AS line_gross,
      ma.amount * (ma.net * (1.0 - ma.rebate / 100.0)) AS line_net,
      CASE WHEN COALESCE(a.track_stock, 1) = 0 THEN 0 ELSE 1 END AS track_stock,
      COALESCE(ll.booked_amount, 0) AS booked_amount
    FROM manifestarticle ma
    LEFT JOIN article a ON a.company_id = @companyId AND (a.sku = ma.sku OR EXISTS (SELECT 1 FROM articlesupplier asup WHERE asup.article_id = a.id AND asup.sku = ma.sku))
    LEFT JOIN line_ledger ll ON ll.manifestarticle_id = ma.id
    WHERE ma.manifest_id = @manifestId
  )
  SELECT
    COUNT(*) AS positions,
    COALESCE(SUM(line_gross), 0) AS gross_total,
    COALESCE(SUM(line_net), 0) AS net_total,
    COALESCE(SUM(amount), 0) AS total_quantity,
    COALESCE(SUM(CASE WHEN track_stock = 1 THEN 1 ELSE 0 END), 0) AS stock_positions,
    COALESCE(SUM(CASE WHEN track_stock = 1 AND (CASE WHEN amount > 0 THEN booked_amount >= amount ELSE booked_amount > 0 END) THEN 1 ELSE 0 END), 0) AS booked_positions,
    COALESCE(SUM(CASE WHEN track_stock = 1 THEN amount ELSE 0 END), 0) AS stock_quantity,
    COALESCE(SUM(CASE WHEN track_stock = 1 THEN booked_amount ELSE 0 END), 0) AS booked_quantity
  FROM line_data
`;

const SQL_UPSERT_SUMMARY_SQLITE = `
  INSERT INTO deliverysummary (
    company_id, manifest_id, delivery_number, external_number, delivery_date, created_at,
    supplier_id, supplier_name, positions, gross_total, net_total, total_quantity,
    stock_positions, booked_positions, unbooked_positions,
    stock_quantity, booked_quantity, unbooked_quantity, is_booked
  ) VALUES (
    @companyId, @manifestId, @deliveryNumber, @externalNumber, @deliveryDate, @createdAt,
    @supplierId, @supplierName, @positions, @grossTotal, @netTotal, @totalQuantity,
    @stockPositions, @bookedPositions, @unbookedPositions,
    @stockQuantity, @bookedQuantity, @unbookedQuantity, @isBooked
  )
  ON CONFLICT(manifest_id) DO UPDATE SET
    delivery_number = excluded.delivery_number,
    external_number = excluded.external_number,
    delivery_date = excluded.delivery_date,
    created_at = excluded.created_at,
    supplier_id = excluded.supplier_id,
    supplier_name = excluded.supplier_name,
    positions = excluded.positions,
    gross_total = excluded.gross_total,
    net_total = excluded.net_total,
    total_quantity = excluded.total_quantity,
    stock_positions = excluded.stock_positions,
    booked_positions = excluded.booked_positions,
    unbooked_positions = excluded.unbooked_positions,
    stock_quantity = excluded.stock_quantity,
    booked_quantity = excluded.booked_quantity,
    unbooked_quantity = excluded.unbooked_quantity,
    is_booked = excluded.is_booked
`;

const SQL_UPSERT_SUMMARY_MSSQL = `
  MERGE INTO deliverysummary AS target
  USING (SELECT @manifestId AS manifest_id) AS source
  ON (target.manifest_id = source.manifest_id)
  WHEN MATCHED THEN
    UPDATE SET
      delivery_number = @deliveryNumber,
      external_number = @externalNumber,
      delivery_date = @deliveryDate,
      created_at = @createdAt,
      supplier_id = @supplierId,
      supplier_name = @supplierName,
      positions = @positions,
      gross_total = @grossTotal,
      net_total = @netTotal,
      total_quantity = @totalQuantity,
      stock_positions = @stockPositions,
      booked_positions = @bookedPositions,
      unbooked_positions = @unbookedPositions,
      stock_quantity = @stockQuantity,
      booked_quantity = @bookedQuantity,
      unbooked_quantity = @unbookedQuantity,
      is_booked = @isBooked
  WHEN NOT MATCHED THEN
    INSERT (
      company_id, manifest_id, delivery_number, external_number, delivery_date, created_at,
      supplier_id, supplier_name, positions, gross_total, net_total, total_quantity,
      stock_positions, booked_positions, unbooked_positions,
      stock_quantity, booked_quantity, unbooked_quantity, is_booked
    ) VALUES (
      @companyId, @manifestId, @deliveryNumber, @externalNumber, @deliveryDate, @createdAt,
      @supplierId, @supplierName, @positions, @grossTotal, @netTotal, @totalQuantity,
      @stockPositions, @bookedPositions, @unbookedPositions,
      @stockQuantity, @bookedQuantity, @unbookedQuantity, @isBooked
    );
`;

/**
 * Recalculates and upserts a single delivery summary into `deliverysummary`.
 *
 * @param {object} runner - Database runner.
 * @param {object} opts
 * @param {number} opts.companyId
 * @param {number} [opts.manifestId] - Delivery manifest id.
 * @param {string} [opts.deliveryNumber] - Delivery number (if manifestId not given).
 */
export async function syncDeliverySummary(runner, { companyId, manifestId, deliveryNumber }) {
  const isSqlite = runner.dialect === 'sqlite3';

  let deliveryRow;
  if (manifestId) {
    const res = await runner.query(
      isSqlite ? SQL_GET_DELIVERY_BY_ID_SQLITE : SQL_GET_DELIVERY_BY_ID_MSSQL,
      { manifestId, companyId },
    );
    deliveryRow = res.rows[0];
  } else if (deliveryNumber) {
    const res = await runner.query(
      isSqlite ? SQL_GET_DELIVERY_BY_NUMBER_SQLITE : SQL_GET_DELIVERY_BY_NUMBER_MSSQL,
      { number: deliveryNumber, companyId },
    );
    deliveryRow = res.rows[0];
  }

  if (!deliveryRow) {
    if (manifestId) {
      await runner.query('DELETE FROM deliverysummary WHERE manifest_id = @manifestId', { manifestId });
    }
    return;
  }

  const deliveryId = deliveryRow.id;
  const num = deliveryRow.number;

  const totalsRes = await runner.query(
    isSqlite ? SQL_DELIVERY_TOTALS_SQLITE : SQL_DELIVERY_TOTALS_MSSQL,
    { manifestId: deliveryId, companyId },
  );
  const totals = totalsRes.rows[0] || {};

  let supplierName = null;
  if (deliveryRow.entity_id) {
    const supRes = await runner.query(
      isSqlite ? SQL_SUPPLIER_NAME_SQLITE : SQL_SUPPLIER_NAME_MSSQL,
      { entityId: deliveryRow.entity_id },
    );
    supplierName = supRes.rows[0]?.supplier_name || null;
  }

  const positions = Number(totals.positions || 0);
  const grossTotal = Math.round(Number(totals.gross_total || 0) * 100) / 100;
  const netTotal = Math.round(Number(totals.net_total || 0) * 100) / 100;
  const totalQuantity = Math.round(Number(totals.total_quantity || 0) * 1000) / 1000;
  const stockPositions = Number(totals.stock_positions || 0);
  const bookedPositions = Number(totals.booked_positions || 0);
  const unbookedPositions = Math.max(0, stockPositions - bookedPositions);
  const stockQuantity = Math.round(Number(totals.stock_quantity || 0) * 1000) / 1000;
  const bookedQuantity = Math.round(Number(totals.booked_quantity || 0) * 1000) / 1000;
  const unbookedQuantity = Math.round(Math.max(0, stockQuantity - bookedQuantity) * 1000) / 1000;
  const isBooked = stockPositions > 0 && bookedPositions >= stockPositions ? 1 : 0;

  await runner.query(isSqlite ? SQL_UPSERT_SUMMARY_SQLITE : SQL_UPSERT_SUMMARY_MSSQL, {
    companyId,
    manifestId: deliveryId,
    deliveryNumber: num,
    externalNumber: deliveryRow.external_number ?? null,
    deliveryDate: deliveryRow.date,
    createdAt: deliveryRow.created_at,
    supplierId: deliveryRow.entity_id ?? null,
    supplierName,
    positions,
    grossTotal,
    netTotal,
    totalQuantity,
    stockPositions,
    bookedPositions,
    unbookedPositions,
    stockQuantity,
    bookedQuantity,
    unbookedQuantity,
    isBooked,
  });
}

/**
 * Full rebuild of all deliveries in `deliverysummary` for a given company.
 *
 * @param {object} runner
 * @param {number} companyId
 */
export async function rebuildDeliverySummaries(runner, companyId) {
  const isSqlite = runner.dialect === 'sqlite3';

  if (isSqlite) {
    const sqlRebuildSqlite = `
      WITH
      line_ledger AS (
        SELECT
          manifestarticle_id,
          SUM(amount) AS booked_amount
        FROM ledger
        WHERE warehouse_id IS NULL
          AND UPPER(transaction_type) IN ('ACCEPTANCE', 'DELIVERY', 'GOODS_RECEIPT')
        GROUP BY manifestarticle_id
      ),
      line_data AS (
        SELECT
          ma.manifest_id,
          ma.id AS line_id,
          ma.amount,
          ma.amount * (ma.net * (1.0 - ma.rebate / 100.0)) * (1.0 + ma.taxrate / 100.0) AS line_gross,
          ma.amount * (ma.net * (1.0 - ma.rebate / 100.0)) AS line_net,
          CASE WHEN COALESCE(a.track_stock, 1) = 0 THEN 0 ELSE 1 END AS track_stock,
          COALESCE(ll.booked_amount, 0) AS booked_amount
        FROM manifestarticle ma
        JOIN manifest m ON m.id = ma.manifest_id
        LEFT JOIN article a ON a.company_id = m.company_id AND (a.sku = ma.sku OR EXISTS (SELECT 1 FROM articlesupplier asup WHERE asup.article_id = a.id AND asup.sku = ma.sku))
        LEFT JOIN line_ledger ll ON ll.manifestarticle_id = ma.id
        WHERE m.company_id = @companyId AND m."type" = 'delivery'
      ),
      delivery_agg AS (
        SELECT
          manifest_id,
          COUNT(*) AS positions,
          SUM(line_gross) AS gross_total,
          SUM(line_net) AS net_total,
          SUM(amount) AS total_quantity,
          SUM(CASE WHEN track_stock = 1 THEN 1 ELSE 0 END) AS stock_positions,
          SUM(CASE WHEN track_stock = 1 AND (CASE WHEN amount > 0 THEN booked_amount >= amount ELSE booked_amount > 0 END) THEN 1 ELSE 0 END) AS booked_positions,
          SUM(CASE WHEN track_stock = 1 THEN amount ELSE 0 END) AS stock_quantity,
          SUM(CASE WHEN track_stock = 1 THEN booked_amount ELSE 0 END) AS booked_quantity
        FROM line_data
        GROUP BY manifest_id
      )
      INSERT INTO deliverysummary (
        company_id, manifest_id, delivery_number, external_number, delivery_date, created_at,
        supplier_id, supplier_name, positions, gross_total, net_total, total_quantity,
        stock_positions, booked_positions, unbooked_positions,
        stock_quantity, booked_quantity, unbooked_quantity, is_booked
      )
      SELECT
        m.company_id,
        m.id AS manifest_id,
        m."number" AS delivery_number,
        m.external_number,
        m."date" AS delivery_date,
        m.created_at,
        m.entity_id AS supplier_id,
        TRIM(COALESCE(e.first_name || ' ', '') || COALESCE(e.name, '')) AS supplier_name,
        COALESCE(da.positions, 0) AS positions,
        ROUND(COALESCE(da.gross_total, 0), 2) AS gross_total,
        ROUND(COALESCE(da.net_total, 0), 2) AS net_total,
        ROUND(COALESCE(da.total_quantity, 0), 3) AS total_quantity,
        COALESCE(da.stock_positions, 0) AS stock_positions,
        COALESCE(da.booked_positions, 0) AS booked_positions,
        MAX(0, COALESCE(da.stock_positions, 0) - COALESCE(da.booked_positions, 0)) AS unbooked_positions,
        ROUND(COALESCE(da.stock_quantity, 0), 3) AS stock_quantity,
        ROUND(COALESCE(da.booked_quantity, 0), 3) AS booked_quantity,
        ROUND(MAX(0, COALESCE(da.stock_quantity, 0) - COALESCE(da.booked_quantity, 0)), 3) AS unbooked_quantity,
        CASE WHEN COALESCE(da.stock_positions, 0) > 0 AND COALESCE(da.booked_positions, 0) >= COALESCE(da.stock_positions, 0) THEN 1 ELSE 0 END AS is_booked
      FROM manifest m
      LEFT JOIN entity e ON e.id = m.entity_id
      LEFT JOIN delivery_agg da ON da.manifest_id = m.id
      WHERE m.company_id = @companyId AND m."type" = 'delivery'
      ON CONFLICT(manifest_id) DO UPDATE SET
        delivery_number = excluded.delivery_number,
        external_number = excluded.external_number,
        delivery_date = excluded.delivery_date,
        created_at = excluded.created_at,
        supplier_id = excluded.supplier_id,
        supplier_name = excluded.supplier_name,
        positions = excluded.positions,
        gross_total = excluded.gross_total,
        net_total = excluded.net_total,
        total_quantity = excluded.total_quantity,
        stock_positions = excluded.stock_positions,
        booked_positions = excluded.booked_positions,
        unbooked_positions = excluded.unbooked_positions,
        stock_quantity = excluded.stock_quantity,
        booked_quantity = excluded.booked_quantity,
        unbooked_quantity = excluded.unbooked_quantity,
        is_booked = excluded.is_booked;
    `;
    await runner.query(sqlRebuildSqlite, { companyId });
  } else {
    await runner.query('DELETE FROM deliverysummary WHERE company_id = @companyId', { companyId });
    const sqlRebuildMssql = `
      WITH
      line_ledger AS (
        SELECT
          manifestarticle_id,
          SUM(amount) AS booked_amount
        FROM ledger
        WHERE warehouse_id IS NULL
          AND UPPER(transaction_type) IN ('ACCEPTANCE', 'DELIVERY', 'GOODS_RECEIPT')
        GROUP BY manifestarticle_id
      ),
      line_data AS (
        SELECT
          ma.manifest_id,
          ma.id AS line_id,
          ma.amount,
          ma.amount * (ma.net * (1.0 - ma.rebate / 100.0)) * (1.0 + ma.taxrate / 100.0) AS line_gross,
          ma.amount * (ma.net * (1.0 - ma.rebate / 100.0)) AS line_net,
          CASE WHEN COALESCE(a.track_stock, 1) = 0 THEN 0 ELSE 1 END AS track_stock,
          COALESCE(ll.booked_amount, 0) AS booked_amount
        FROM manifestarticle ma
        JOIN manifest m ON m.id = ma.manifest_id
        LEFT JOIN article a ON a.company_id = m.company_id AND (a.sku = ma.sku OR EXISTS (SELECT 1 FROM articlesupplier asup WHERE asup.article_id = a.id AND asup.sku = ma.sku))
        LEFT JOIN line_ledger ll ON ll.manifestarticle_id = ma.id
        WHERE m.company_id = @companyId AND m.[type] = 'delivery'
      ),
      delivery_agg AS (
        SELECT
          manifest_id,
          COUNT(*) AS positions,
          SUM(line_gross) AS gross_total,
          SUM(line_net) AS net_total,
          SUM(amount) AS total_quantity,
          SUM(CASE WHEN track_stock = 1 THEN 1 ELSE 0 END) AS stock_positions,
          SUM(CASE WHEN track_stock = 1 AND (CASE WHEN amount > 0 THEN booked_amount >= amount ELSE booked_amount > 0 END) THEN 1 ELSE 0 END) AS booked_positions,
          SUM(CASE WHEN track_stock = 1 THEN amount ELSE 0 END) AS stock_quantity,
          SUM(CASE WHEN track_stock = 1 THEN booked_amount ELSE 0 END) AS booked_quantity
        FROM line_data
        GROUP BY manifest_id
      )
      INSERT INTO deliverysummary (
        company_id, manifest_id, delivery_number, external_number, delivery_date, created_at,
        supplier_id, supplier_name, positions, gross_total, net_total, total_quantity,
        stock_positions, booked_positions, unbooked_positions,
        stock_quantity, booked_quantity, unbooked_quantity, is_booked
      )
      SELECT
        m.company_id,
        m.id AS manifest_id,
        m.[number] AS delivery_number,
        m.external_number,
        m.[date] AS delivery_date,
        m.created_at,
        m.entity_id AS supplier_id,
        LTRIM(RTRIM(ISNULL(e.first_name + ' ', '') + ISNULL(e.name, ''))) AS supplier_name,
        COALESCE(da.positions, 0) AS positions,
        ROUND(COALESCE(da.gross_total, 0), 2) AS gross_total,
        ROUND(COALESCE(da.net_total, 0), 2) AS net_total,
        ROUND(COALESCE(da.total_quantity, 0), 3) AS total_quantity,
        COALESCE(da.stock_positions, 0) AS stock_positions,
        COALESCE(da.booked_positions, 0) AS booked_positions,
        CASE WHEN COALESCE(da.stock_positions, 0) > COALESCE(da.booked_positions, 0) THEN COALESCE(da.stock_positions, 0) - COALESCE(da.booked_positions, 0) ELSE 0 END AS unbooked_positions,
        ROUND(COALESCE(da.stock_quantity, 0), 3) AS stock_quantity,
        ROUND(COALESCE(da.booked_quantity, 0), 3) AS booked_quantity,
        ROUND(CASE WHEN COALESCE(da.stock_quantity, 0) > COALESCE(da.booked_quantity, 0) THEN COALESCE(da.stock_quantity, 0) - COALESCE(da.booked_quantity, 0) ELSE 0 END, 3) AS unbooked_quantity,
        CASE WHEN COALESCE(da.stock_positions, 0) > 0 AND COALESCE(da.booked_positions, 0) >= COALESCE(da.stock_positions, 0) THEN 1 ELSE 0 END AS is_booked
      FROM manifest m
      LEFT JOIN entity e ON e.id = m.entity_id
      LEFT JOIN delivery_agg da ON da.manifest_id = m.id
      WHERE m.company_id = @companyId AND m.[type] = 'delivery';
    `;
    await runner.query(sqlRebuildMssql, { companyId });
  }
}