/**
 * 공정 작업기준 컨트롤러
 * 품목별 라우팅/공정에 대한 작업 항목 및 상세 관리
 */

import { Request, Response } from "express";
import { getPool } from "../database/db";
import { logger } from "../utils/logger";

// ============================================================
// 품목/라우팅/공정 조회 (좌측 트리 데이터)
// ============================================================

/**
 * 라우팅이 있는 품목 목록 조회
 * 요청 쿼리: tableName(품목테이블), nameColumn, codeColumn
 */
export async function getItemsWithRouting(req: Request, res: Response) {
  try {
    const companyCode = req.user?.companyCode;
    if (!companyCode) {
      return res.status(401).json({ success: false, message: "인증 필요" });
    }

    const {
      tableName = "item_info",
      nameColumn = "item_name",
      codeColumn = "item_number",
      routingTable = "item_routing_version",
      routingFkColumn = "item_code",
      search = "",
    } = req.query as Record<string, string>;

    const searchCondition = search
      ? `AND (i.${nameColumn} ILIKE $2 OR i.${codeColumn} ILIKE $2)`
      : "";
    const params: any[] = [companyCode];
    if (search) params.push(`%${search}%`);

    const query = `
      SELECT DISTINCT
        i.id,
        i.${nameColumn} AS item_name,
        i.${codeColumn} AS item_code
      FROM ${tableName} i
      INNER JOIN ${routingTable} rv ON rv.${routingFkColumn} = i.${codeColumn}
        AND rv.company_code = i.company_code
      WHERE i.company_code = $1
        ${searchCondition}
      ORDER BY i.${codeColumn}
    `;

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

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

/**
 * 품목별 라우팅 버전 + 공정 목록 조회 (트리 하위 데이터)
 */
export async function getRoutingsWithProcesses(req: Request, res: Response) {
  try {
    const companyCode = req.user?.companyCode;
    if (!companyCode) {
      return res.status(401).json({ success: false, message: "인증 필요" });
    }

    const { itemCode } = req.params;
    const {
      routingVersionTable = "item_routing_version",
      routingDetailTable = "item_routing_detail",
      routingFkColumn = "item_code",
      processTable = "process_mng",
      processNameColumn = "process_name",
      processCodeColumn = "process_code",
    } = req.query as Record<string, string>;

    // 라우팅 버전 목록
    const versionsQuery = `
      SELECT id, version_name, description, created_date
      FROM ${routingVersionTable}
      WHERE ${routingFkColumn} = $1 AND company_code = $2
      ORDER BY created_date DESC
    `;
    const versionsResult = await getPool().query(versionsQuery, [
      itemCode,
      companyCode,
    ]);

    // 각 버전별 공정 목록
    const routings = [];
    for (const version of versionsResult.rows) {
      const detailsQuery = `
        SELECT
          rd.id AS routing_detail_id,
          rd.seq_no,
          rd.process_code,
          rd.is_required,
          rd.work_type,
          p.${processNameColumn} AS process_name
        FROM ${routingDetailTable} rd
        LEFT JOIN ${processTable} p ON p.${processCodeColumn} = rd.process_code
          AND p.company_code = rd.company_code
        WHERE rd.routing_version_id = $1 AND rd.company_code = $2
        ORDER BY rd.seq_no::integer
      `;
      const detailsResult = await getPool().query(detailsQuery, [
        version.id,
        companyCode,
      ]);

      routings.push({
        ...version,
        processes: detailsResult.rows,
      });
    }

    return res.json({ success: true, data: routings });
  } catch (error: any) {
    logger.error("라우팅/공정 조회 실패", { error: error.message });
    return res.status(500).json({ success: false, message: error.message });
  }
}

// ============================================================
// 작업 항목 CRUD
// ============================================================

/**
 * 공정별 작업 항목 목록 조회 (phase별 그룹)
 */
export async function getWorkItems(req: Request, res: Response) {
  try {
    const companyCode = req.user?.companyCode;
    if (!companyCode) {
      return res.status(401).json({ success: false, message: "인증 필요" });
    }

    const { routingDetailId } = req.params;

    const query = `
      SELECT
        wi.id,
        wi.routing_detail_id,
        wi.work_phase,
        wi.title,
        wi.is_required,
        wi.sort_order,
        wi.description,
        wi.created_date,
        (SELECT COUNT(*) FROM process_work_item_detail d
         WHERE d.work_item_id = wi.id AND d.company_code = wi.company_code
        )::integer AS detail_count
      FROM process_work_item wi
      WHERE wi.routing_detail_id = $1 AND wi.company_code = $2
      ORDER BY wi.work_phase, wi.sort_order, wi.created_date
    `;

    const result = await getPool().query(query, [routingDetailId, companyCode]);

    // phase별 그룹핑
    const grouped: Record<string, any[]> = {};
    for (const row of result.rows) {
      const phase = row.work_phase;
      if (!grouped[phase]) grouped[phase] = [];
      grouped[phase].push(row);
    }

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

/**
 * 작업 항목 추가
 */
export async function createWorkItem(req: Request, res: Response) {
  try {
    const companyCode = req.user?.companyCode;
    const writer = req.user?.userId;
    if (!companyCode) {
      return res.status(401).json({ success: false, message: "인증 필요" });
    }

    const { routing_detail_id, work_phase, title, is_required, sort_order, description } = req.body;

    if (!routing_detail_id || !work_phase || !title) {
      return res.status(400).json({
        success: false,
        message: "routing_detail_id, work_phase, title은 필수입니다",
      });
    }

    const query = `
      INSERT INTO process_work_item
        (company_code, routing_detail_id, work_phase, title, is_required, sort_order, description, writer)
      VALUES ($1, $2, $3, $4, $5, $6, $7, $8)
      RETURNING *
    `;

    const result = await getPool().query(query, [
      companyCode,
      routing_detail_id,
      work_phase,
      title,
      is_required || "N",
      sort_order || 0,
      description || null,
      writer,
    ]);

    logger.info("작업 항목 생성", { companyCode, id: result.rows[0].id });
    return res.json({ success: true, data: result.rows[0] });
  } catch (error: any) {
    logger.error("작업 항목 생성 실패", { error: error.message });
    return res.status(500).json({ success: false, message: error.message });
  }
}

/**
 * 작업 항목 수정
 */
export async function updateWorkItem(req: Request, res: Response) {
  try {
    const companyCode = req.user?.companyCode;
    if (!companyCode) {
      return res.status(401).json({ success: false, message: "인증 필요" });
    }

    const { id } = req.params;
    const { title, is_required, sort_order, description } = req.body;

    const query = `
      UPDATE process_work_item
      SET title = COALESCE($1, title),
          is_required = COALESCE($2, is_required),
          sort_order = COALESCE($3, sort_order),
          description = COALESCE($4, description),
          updated_date = NOW()
      WHERE id = $5 AND company_code = $6
      RETURNING *
    `;

    const result = await getPool().query(query, [
      title,
      is_required,
      sort_order,
      description,
      id,
      companyCode,
    ]);

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

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

/**
 * 작업 항목 삭제 (상세도 함께 삭제)
 */
export async function deleteWorkItem(req: Request, res: Response) {
  const client = await getPool().connect();
  try {
    const companyCode = req.user?.companyCode;
    if (!companyCode) {
      return res.status(401).json({ success: false, message: "인증 필요" });
    }

    const { id } = req.params;

    await client.query("BEGIN");

    // 상세 먼저 삭제
    await client.query(
      "DELETE FROM process_work_item_detail WHERE work_item_id = $1 AND company_code = $2",
      [id, companyCode]
    );

    // 항목 삭제
    const result = await client.query(
      "DELETE FROM process_work_item WHERE id = $1 AND company_code = $2 RETURNING id",
      [id, companyCode]
    );

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

    await client.query("COMMIT");
    logger.info("작업 항목 삭제", { companyCode, id });
    return res.json({ success: true });
  } catch (error: any) {
    await client.query("ROLLBACK");
    logger.error("작업 항목 삭제 실패", { error: error.message });
    return res.status(500).json({ success: false, message: error.message });
  } finally {
    client.release();
  }
}

// ============================================================
// 작업 항목 상세 CRUD
// ============================================================

/**
 * 작업 항목 상세 목록 조회
 */
export async function getWorkItemDetails(req: Request, res: Response) {
  try {
    const companyCode = req.user?.companyCode;
    if (!companyCode) {
      return res.status(401).json({ success: false, message: "인증 필요" });
    }

    const { workItemId } = req.params;

    const query = `
      SELECT id, work_item_id, detail_type, content, is_required, sort_order, remark, created_date
      FROM process_work_item_detail
      WHERE work_item_id = $1 AND company_code = $2
      ORDER BY sort_order, created_date
    `;

    const result = await getPool().query(query, [workItemId, companyCode]);
    return res.json({ success: true, data: result.rows });
  } catch (error: any) {
    logger.error("작업 항목 상세 조회 실패", { error: error.message });
    return res.status(500).json({ success: false, message: error.message });
  }
}

/**
 * 작업 항목 상세 추가
 */
export async function createWorkItemDetail(req: Request, res: Response) {
  try {
    const companyCode = req.user?.companyCode;
    const writer = req.user?.userId;
    if (!companyCode) {
      return res.status(401).json({ success: false, message: "인증 필요" });
    }

    const { work_item_id, detail_type, content, is_required, sort_order, remark } = req.body;

    if (!work_item_id || !content) {
      return res.status(400).json({
        success: false,
        message: "work_item_id, content는 필수입니다",
      });
    }

    // work_item이 같은 company_code인지 검증
    const ownerCheck = await getPool().query(
      "SELECT id FROM process_work_item WHERE id = $1 AND company_code = $2",
      [work_item_id, companyCode]
    );
    if (ownerCheck.rowCount === 0) {
      return res.status(403).json({ success: false, message: "권한이 없습니다" });
    }

    const query = `
      INSERT INTO process_work_item_detail
        (company_code, work_item_id, detail_type, content, is_required, sort_order, remark, writer)
      VALUES ($1, $2, $3, $4, $5, $6, $7, $8)
      RETURNING *
    `;

    const result = await getPool().query(query, [
      companyCode,
      work_item_id,
      detail_type || null,
      content,
      is_required || "N",
      sort_order || 0,
      remark || null,
      writer,
    ]);

    logger.info("작업 항목 상세 생성", { companyCode, id: result.rows[0].id });
    return res.json({ success: true, data: result.rows[0] });
  } catch (error: any) {
    logger.error("작업 항목 상세 생성 실패", { error: error.message });
    return res.status(500).json({ success: false, message: error.message });
  }
}

/**
 * 작업 항목 상세 수정
 */
export async function updateWorkItemDetail(req: Request, res: Response) {
  try {
    const companyCode = req.user?.companyCode;
    if (!companyCode) {
      return res.status(401).json({ success: false, message: "인증 필요" });
    }

    const { id } = req.params;
    const { detail_type, content, is_required, sort_order, remark } = req.body;

    const query = `
      UPDATE process_work_item_detail
      SET detail_type = COALESCE($1, detail_type),
          content = COALESCE($2, content),
          is_required = COALESCE($3, is_required),
          sort_order = COALESCE($4, sort_order),
          remark = COALESCE($5, remark),
          updated_date = NOW()
      WHERE id = $6 AND company_code = $7
      RETURNING *
    `;

    const result = await getPool().query(query, [
      detail_type,
      content,
      is_required,
      sort_order,
      remark,
      id,
      companyCode,
    ]);

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

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

/**
 * 작업 항목 상세 삭제
 */
export async function deleteWorkItemDetail(req: Request, res: Response) {
  try {
    const companyCode = req.user?.companyCode;
    if (!companyCode) {
      return res.status(401).json({ success: false, message: "인증 필요" });
    }

    const { id } = req.params;

    const result = await getPool().query(
      "DELETE FROM process_work_item_detail WHERE id = $1 AND company_code = $2 RETURNING id",
      [id, companyCode]
    );

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

    logger.info("작업 항목 상세 삭제", { companyCode, id });
    return res.json({ success: true });
  } catch (error: any) {
    logger.error("작업 항목 상세 삭제 실패", { error: error.message });
    return res.status(500).json({ success: false, message: error.message });
  }
}

// ============================================================
// 전체 저장 (일괄)
// ============================================================

/**
 * 전체 저장: 작업 항목 + 상세를 일괄 저장
 * 기존 데이터를 삭제하고 새로 삽입하는 replace 방식
 */
export async function saveAll(req: Request, res: Response) {
  const client = await getPool().connect();
  try {
    const companyCode = req.user?.companyCode;
    const writer = req.user?.userId;
    if (!companyCode) {
      return res.status(401).json({ success: false, message: "인증 필요" });
    }

    const { routing_detail_id, items } = req.body;

    if (!routing_detail_id || !Array.isArray(items)) {
      return res.status(400).json({
        success: false,
        message: "routing_detail_id와 items 배열이 필요합니다",
      });
    }

    await client.query("BEGIN");

    // 기존 상세 삭제
    await client.query(
      `DELETE FROM process_work_item_detail
       WHERE work_item_id IN (
         SELECT id FROM process_work_item
         WHERE routing_detail_id = $1 AND company_code = $2
       )`,
      [routing_detail_id, companyCode]
    );

    // 기존 항목 삭제
    await client.query(
      "DELETE FROM process_work_item WHERE routing_detail_id = $1 AND company_code = $2",
      [routing_detail_id, companyCode]
    );

    // 새 항목 + 상세 삽입
    for (const item of items) {
      const itemResult = await client.query(
        `INSERT INTO process_work_item
          (company_code, routing_detail_id, work_phase, title, is_required, sort_order, description, writer)
         VALUES ($1, $2, $3, $4, $5, $6, $7, $8)
         RETURNING id`,
        [
          companyCode,
          routing_detail_id,
          item.work_phase,
          item.title,
          item.is_required || "N",
          item.sort_order || 0,
          item.description || null,
          writer,
        ]
      );

      const workItemId = itemResult.rows[0].id;

      if (Array.isArray(item.details)) {
        for (const detail of item.details) {
          await client.query(
            `INSERT INTO process_work_item_detail
              (company_code, work_item_id, detail_type, content, is_required, sort_order, remark, writer)
             VALUES ($1, $2, $3, $4, $5, $6, $7, $8)`,
            [
              companyCode,
              workItemId,
              detail.detail_type || null,
              detail.content,
              detail.is_required || "N",
              detail.sort_order || 0,
              detail.remark || null,
              writer,
            ]
          );
        }
      }
    }

    await client.query("COMMIT");
    logger.info("작업기준 전체 저장", { companyCode, routing_detail_id, itemCount: items.length });
    return res.json({ success: true, message: "저장 완료" });
  } catch (error: any) {
    await client.query("ROLLBACK");
    logger.error("작업기준 전체 저장 실패", { error: error.message });
    return res.status(500).json({ success: false, message: error.message });
  } finally {
    client.release();
  }
}