/**
 * 입고관리 컨트롤러
 *
 * 입고유형별 소스 테이블:
 *  - 구매입고 → purchase_order_mng (발주)
 *  - 반품입고 → shipment_instruction + shipment_instruction_detail (출하)
 *  - 기타입고 → item_info (품목)
 */

import { Response } from "express";
import { AuthenticatedRequest } from "../types/auth";
import { getPool } from "../database/db";
import { logger } from "../utils/logger";

// 입고 목록 조회
export async function getList(req: AuthenticatedRequest, res: Response) {
  try {
    const companyCode = req.user!.companyCode;
    const {
      inbound_type,
      inbound_status,
      search_keyword,
      date_from,
      date_to,
    } = req.query;

    const conditions: string[] = [];
    const params: any[] = [];
    let paramIdx = 1;

    if (companyCode === "*") {
      // 최고 관리자: 전체 조회
    } else {
      conditions.push(`im.company_code = $${paramIdx}`);
      params.push(companyCode);
      paramIdx++;
    }

    if (inbound_type && inbound_type !== "all") {
      conditions.push(`im.inbound_type = $${paramIdx}`);
      params.push(inbound_type);
      paramIdx++;
    }

    if (inbound_status && inbound_status !== "all") {
      conditions.push(`im.inbound_status = $${paramIdx}`);
      params.push(inbound_status);
      paramIdx++;
    }

    if (search_keyword) {
      conditions.push(
        `(im.inbound_number ILIKE $${paramIdx} OR im.item_name ILIKE $${paramIdx} OR im.item_number ILIKE $${paramIdx} OR im.supplier_name ILIKE $${paramIdx} OR im.reference_number ILIKE $${paramIdx})`
      );
      params.push(`%${search_keyword}%`);
      paramIdx++;
    }

    if (date_from) {
      conditions.push(`im.inbound_date >= $${paramIdx}::date`);
      params.push(date_from);
      paramIdx++;
    }
    if (date_to) {
      conditions.push(`im.inbound_date <= $${paramIdx}::date`);
      params.push(date_to);
      paramIdx++;
    }

    const whereClause =
      conditions.length > 0 ? `WHERE ${conditions.join(" AND ")}` : "";

    const query = `
      SELECT
        im.*,
        wh.warehouse_name
      FROM inbound_mng im
      LEFT JOIN warehouse_info wh
        ON im.warehouse_code = wh.warehouse_code
        AND im.company_code = wh.company_code
      ${whereClause}
      ORDER BY im.created_date DESC
    `;

    const pool = getPool();
    const result = await pool.query(query, params);

    logger.info("입고 목록 조회", {
      companyCode,
      rowCount: result.rowCount,
    });

    return res.json({ success: true, data: result.rows });
  } catch (error: any) {
    logger.error("입고 목록 조회 실패", { error: error.message });
    return res.status(500).json({ success: false, message: error.message });
  }
}

// 입고 등록 (다건)
export async function create(req: AuthenticatedRequest, res: Response) {
  const pool = getPool();
  const client = await pool.connect();

  try {
    const companyCode = req.user!.companyCode;
    const userId = req.user!.userId;
    const { items, inbound_number, inbound_date, warehouse_code, location_code, inspector, manager, memo } = req.body;

    if (!items || !Array.isArray(items) || items.length === 0) {
      return res.status(400).json({ success: false, message: "입고 품목이 없습니다." });
    }

    await client.query("BEGIN");

    const insertedRows: any[] = [];

    for (const item of items) {
      const result = await client.query(
        `INSERT INTO inbound_mng (
          company_code, inbound_number, inbound_type, inbound_date,
          reference_number, supplier_code, supplier_name,
          item_number, item_name, spec, material, unit,
          inbound_qty, unit_price, total_amount,
          lot_number, warehouse_code, location_code,
          inbound_status, inspection_status,
          inspector, manager, memo,
          source_table, source_id,
          created_date, created_by, writer, status
        ) VALUES (
          $1, $2, $3, $4::date,
          $5, $6, $7,
          $8, $9, $10, $11, $12,
          $13, $14, $15,
          $16, $17, $18,
          $19, $20,
          $21, $22, $23,
          $24, $25,
          NOW(), $26, $26, '입고'
        ) RETURNING *`,
        [
          companyCode,
          inbound_number || item.inbound_number,
          item.inbound_type,
          inbound_date || item.inbound_date,
          item.reference_number || null,
          item.supplier_code || null,
          item.supplier_name || null,
          item.item_number || null,
          item.item_name || null,
          item.spec || null,
          item.material || null,
          item.unit || "EA",
          item.inbound_qty || 0,
          item.unit_price || 0,
          item.total_amount || 0,
          item.lot_number || null,
          warehouse_code || item.warehouse_code || null,
          location_code || item.location_code || null,
          item.inbound_status || "대기",
          item.inspection_status || "대기",
          inspector || item.inspector || null,
          manager || item.manager || null,
          memo || item.memo || null,
          item.source_table || null,
          item.source_id || null,
          userId,
        ]
      );

      insertedRows.push(result.rows[0]);

      // 구매입고인 경우 발주의 received_qty 업데이트
      if (item.inbound_type === "구매입고" && item.source_id && item.source_table === "purchase_order_mng") {
        await client.query(
          `UPDATE purchase_order_mng
           SET received_qty = CAST(
             COALESCE(CAST(NULLIF(received_qty, '') AS numeric), 0) + $1 AS text
           ),
           remain_qty = CAST(
             GREATEST(COALESCE(CAST(NULLIF(order_qty, '') AS numeric), 0)
               - COALESCE(CAST(NULLIF(received_qty, '') AS numeric), 0) - $1, 0) AS text
           ),
           status = CASE
             WHEN COALESCE(CAST(NULLIF(received_qty, '') AS numeric), 0) + $1
               >= COALESCE(CAST(NULLIF(order_qty, '') AS numeric), 0)
             THEN '입고완료'
             ELSE '부분입고'
           END,
           updated_date = NOW()
           WHERE id = $2 AND company_code = $3`,
          [item.inbound_qty || 0, item.source_id, companyCode]
        );
      }
    }

    await client.query("COMMIT");

    logger.info("입고 등록 완료", {
      companyCode,
      userId,
      count: insertedRows.length,
      inbound_number,
    });

    return res.json({
      success: true,
      data: insertedRows,
      message: `${insertedRows.length}건 입고 등록 완료`,
    });
  } catch (error: any) {
    await client.query("ROLLBACK");
    logger.error("입고 등록 실패", { error: error.message });
    return res.status(500).json({ success: false, message: error.message });
  } finally {
    client.release();
  }
}

// 입고 수정
export async function update(req: AuthenticatedRequest, res: Response) {
  try {
    const companyCode = req.user!.companyCode;
    const userId = req.user!.userId;
    const { id } = req.params;
    const {
      inbound_date, inbound_qty, unit_price, total_amount,
      lot_number, warehouse_code, location_code,
      inbound_status, inspection_status,
      inspector, manager: mgr, memo,
    } = req.body;

    const pool = getPool();
    const result = await pool.query(
      `UPDATE inbound_mng SET
        inbound_date = COALESCE($1::date, inbound_date),
        inbound_qty = COALESCE($2, inbound_qty),
        unit_price = COALESCE($3, unit_price),
        total_amount = COALESCE($4, total_amount),
        lot_number = COALESCE($5, lot_number),
        warehouse_code = COALESCE($6, warehouse_code),
        location_code = COALESCE($7, location_code),
        inbound_status = COALESCE($8, inbound_status),
        inspection_status = COALESCE($9, inspection_status),
        inspector = COALESCE($10, inspector),
        manager = COALESCE($11, manager),
        memo = COALESCE($12, memo),
        updated_date = NOW(),
        updated_by = $13
      WHERE id = $14 AND company_code = $15
      RETURNING *`,
      [
        inbound_date, inbound_qty, unit_price, total_amount,
        lot_number, warehouse_code, location_code,
        inbound_status, inspection_status,
        inspector, mgr, memo,
        userId, id, companyCode,
      ]
    );

    if (result.rowCount === 0) {
      return res.status(404).json({ success: false, message: "입고 데이터를 찾을 수 없습니다." });
    }

    logger.info("입고 수정", { companyCode, userId, id });

    return res.json({ success: true, data: result.rows[0] });
  } catch (error: any) {
    logger.error("입고 수정 실패", { error: error.message });
    return res.status(500).json({ success: false, message: error.message });
  }
}

// 입고 삭제
export async function deleteReceiving(req: AuthenticatedRequest, res: Response) {
  try {
    const companyCode = req.user!.companyCode;
    const { id } = req.params;
    const pool = getPool();

    const result = await pool.query(
      `DELETE FROM inbound_mng WHERE id = $1 AND company_code = $2 RETURNING id`,
      [id, companyCode]
    );

    if (result.rowCount === 0) {
      return res.status(404).json({ success: false, message: "데이터를 찾을 수 없습니다." });
    }

    logger.info("입고 삭제", { companyCode, id });

    return res.json({ success: true, message: "삭제 완료" });
  } catch (error: any) {
    logger.error("입고 삭제 실패", { error: error.message });
    return res.status(500).json({ success: false, message: error.message });
  }
}

// 구매입고용: 발주 데이터 조회 (미입고분)
export async function getPurchaseOrders(req: AuthenticatedRequest, res: Response) {
  try {
    const companyCode = req.user!.companyCode;
    const { keyword } = req.query;

    const conditions: string[] = ["company_code = $1"];
    const params: any[] = [companyCode];
    let paramIdx = 2;

    // 잔량이 있는 것만 조회
    conditions.push(
      `COALESCE(CAST(NULLIF(remain_qty, '') AS numeric), COALESCE(CAST(NULLIF(order_qty, '') AS numeric), 0) - COALESCE(CAST(NULLIF(received_qty, '') AS numeric), 0)) > 0`
    );
    conditions.push(`status NOT IN ('입고완료', '취소')`);

    if (keyword) {
      conditions.push(
        `(purchase_no ILIKE $${paramIdx} OR item_name ILIKE $${paramIdx} OR item_code ILIKE $${paramIdx} OR supplier_name ILIKE $${paramIdx})`
      );
      params.push(`%${keyword}%`);
      paramIdx++;
    }

    const pool = getPool();
    const result = await pool.query(
      `SELECT
        id, purchase_no, order_date, supplier_code, supplier_name,
        item_code, item_name, spec, material,
        COALESCE(CAST(NULLIF(order_qty, '') AS numeric), 0) AS order_qty,
        COALESCE(CAST(NULLIF(received_qty, '') AS numeric), 0) AS received_qty,
        COALESCE(CAST(NULLIF(remain_qty, '') AS numeric),
          COALESCE(CAST(NULLIF(order_qty, '') AS numeric), 0)
          - COALESCE(CAST(NULLIF(received_qty, '') AS numeric), 0)
        ) AS remain_qty,
        COALESCE(CAST(NULLIF(unit_price, '') AS numeric), 0) AS unit_price,
        status, due_date
      FROM purchase_order_mng
      WHERE ${conditions.join(" AND ")}
      ORDER BY order_date DESC, purchase_no`,
      params
    );

    return res.json({ success: true, data: result.rows });
  } catch (error: any) {
    logger.error("발주 데이터 조회 실패", { error: error.message });
    return res.status(500).json({ success: false, message: error.message });
  }
}

// 반품입고용: 출하 데이터 조회
export async function getShipments(req: AuthenticatedRequest, res: Response) {
  try {
    const companyCode = req.user!.companyCode;
    const { keyword } = req.query;

    const conditions: string[] = ["si.company_code = $1"];
    const params: any[] = [companyCode];
    let paramIdx = 2;

    if (keyword) {
      conditions.push(
        `(si.instruction_no ILIKE $${paramIdx} OR sid.item_name ILIKE $${paramIdx} OR sid.item_code ILIKE $${paramIdx})`
      );
      params.push(`%${keyword}%`);
      paramIdx++;
    }

    const pool = getPool();
    const result = await pool.query(
      `SELECT
        sid.id AS detail_id,
        si.id AS instruction_id,
        si.instruction_no,
        si.instruction_date,
        si.partner_id,
        si.status AS instruction_status,
        sid.item_code,
        sid.item_name,
        sid.spec,
        sid.material,
        COALESCE(sid.ship_qty, 0) AS ship_qty,
        COALESCE(sid.order_qty, 0) AS order_qty,
        sid.source_type
      FROM shipment_instruction si
      JOIN shipment_instruction_detail sid
        ON si.id = sid.instruction_id
        AND si.company_code = sid.company_code
      WHERE ${conditions.join(" AND ")}
      ORDER BY si.instruction_date DESC, si.instruction_no`,
      params
    );

    return res.json({ success: true, data: result.rows });
  } catch (error: any) {
    logger.error("출하 데이터 조회 실패", { error: error.message });
    return res.status(500).json({ success: false, message: error.message });
  }
}

// 기타입고용: 품목 데이터 조회
export async function getItems(req: AuthenticatedRequest, res: Response) {
  try {
    const companyCode = req.user!.companyCode;
    const { keyword } = req.query;

    const conditions: string[] = ["company_code = $1"];
    const params: any[] = [companyCode];
    let paramIdx = 2;

    if (keyword) {
      conditions.push(
        `(item_number ILIKE $${paramIdx} OR item_name ILIKE $${paramIdx})`
      );
      params.push(`%${keyword}%`);
      paramIdx++;
    }

    const pool = getPool();
    const result = await pool.query(
      `SELECT
        id, item_number, item_name, size AS spec, material, unit,
        COALESCE(CAST(NULLIF(standard_price, '') AS numeric), 0) AS standard_price
      FROM item_info
      WHERE ${conditions.join(" AND ")}
      ORDER BY item_name`,
      params
    );

    return res.json({ success: true, data: result.rows });
  } catch (error: any) {
    logger.error("품목 데이터 조회 실패", { error: error.message });
    return res.status(500).json({ success: false, message: error.message });
  }
}

// 입고번호 자동생성
export async function generateNumber(req: AuthenticatedRequest, res: Response) {
  try {
    const companyCode = req.user!.companyCode;
    const pool = getPool();

    const today = new Date();
    const yyyy = today.getFullYear();
    const prefix = `RCV-${yyyy}-`;

    const result = await pool.query(
      `SELECT inbound_number FROM inbound_mng
       WHERE company_code = $1 AND inbound_number LIKE $2
       ORDER BY inbound_number DESC LIMIT 1`,
      [companyCode, `${prefix}%`]
    );

    let seq = 1;
    if (result.rows.length > 0) {
      const lastNo = result.rows[0].inbound_number;
      const lastSeq = parseInt(lastNo.replace(prefix, ""), 10);
      if (!isNaN(lastSeq)) seq = lastSeq + 1;
    }

    const newNumber = `${prefix}${String(seq).padStart(4, "0")}`;

    return res.json({ success: true, data: newNumber });
  } catch (error: any) {
    logger.error("입고번호 생성 실패", { error: error.message });
    return res.status(500).json({ success: false, message: error.message });
  }
}

// 창고 목록 조회
export async function getWarehouses(req: AuthenticatedRequest, res: Response) {
  try {
    const companyCode = req.user!.companyCode;
    const pool = getPool();

    const result = await pool.query(
      `SELECT warehouse_code, warehouse_name, warehouse_type
       FROM warehouse_info
       WHERE company_code = $1 AND status != '삭제'
       ORDER BY warehouse_name`,
      [companyCode]
    );

    return res.json({ success: true, data: result.rows });
  } catch (error: any) {
    logger.error("창고 목록 조회 실패", { error: error.message });
    return res.status(500).json({ success: false, message: error.message });
  }
}
