const db = require('../models');
const FileDBApi = require('./file');
const crypto = require('crypto');
const Utils = require('../utils');

const Sequelize = db.Sequelize;
const Op = Sequelize.Op;

module.exports = class ProductsDBApi {
  static async create(data, options) {
    const currentUser = (options && options.currentUser) || { id: null };
    const transaction = (options && options.transaction) || undefined;

    const products = await db.products.create(
      {
        id: data.id || undefined,

        sku: data.sku || null,
        name: data.name || null,
        purchase_price: data.purchase_price || null,
        sale_price: data.sale_price || null,
        stock: data.stock || null,
        price_level: data.price_level || null,
        low_stock_notification: data.low_stock_notification || false,

        importHash: data.importHash || null,
        createdById: currentUser.id,
        updatedById: currentUser.id,
      },
      { transaction },
    );

    await products.setCategory(data.category || null, {
      transaction,
    });

    return products;
  }

  static async bulkImport(data, options) {
    const currentUser = (options && options.currentUser) || { id: null };
    const transaction = (options && options.transaction) || undefined;

    // Prepare data - wrapping individual data transformations in a map() method
    const productsData = data.map((item, index) => ({
      id: item.id || undefined,

      sku: item.sku || null,
      name: item.name || null,
      purchase_price: item.purchase_price || null,
      sale_price: item.sale_price || null,
      stock: item.stock || null,
      price_level: item.price_level || null,
      low_stock_notification: item.low_stock_notification || false,

      importHash: item.importHash || null,
      createdById: currentUser.id,
      updatedById: currentUser.id,
      createdAt: new Date(Date.now() + index * 1000),
    }));

    // Bulk create items
    const products = await db.products.bulkCreate(productsData, {
      transaction,
    });

    // For each item created, replace relation files

    return products;
  }

  static async update(id, data, options) {
    const currentUser = (options && options.currentUser) || { id: null };
    const transaction = (options && options.transaction) || undefined;

    const products = await db.products.findByPk(id, {}, { transaction });

    const updatePayload = {};

    if (data.sku !== undefined) updatePayload.sku = data.sku;

    if (data.name !== undefined) updatePayload.name = data.name;

    if (data.purchase_price !== undefined)
      updatePayload.purchase_price = data.purchase_price;

    if (data.sale_price !== undefined)
      updatePayload.sale_price = data.sale_price;

    if (data.stock !== undefined) updatePayload.stock = data.stock;

    if (data.price_level !== undefined)
      updatePayload.price_level = data.price_level;

    if (data.low_stock_notification !== undefined)
      updatePayload.low_stock_notification = data.low_stock_notification;

    updatePayload.updatedById = currentUser.id;

    await products.update(updatePayload, { transaction });

    if (data.category !== undefined) {
      await products.setCategory(
        data.category,

        { transaction },
      );
    }

    return products;
  }

  static async deleteByIds(ids, options) {
    const currentUser = (options && options.currentUser) || { id: null };
    const transaction = (options && options.transaction) || undefined;

    const products = await db.products.findAll({
      where: {
        id: {
          [Op.in]: ids,
        },
      },
      transaction,
    });

    await db.sequelize.transaction(async (transaction) => {
      for (const record of products) {
        await record.update({ deletedBy: currentUser.id }, { transaction });
      }
      for (const record of products) {
        await record.destroy({ transaction });
      }
    });

    return products;
  }

  static async remove(id, options) {
    const currentUser = (options && options.currentUser) || { id: null };
    const transaction = (options && options.transaction) || undefined;

    const products = await db.products.findByPk(id, options);

    await products.update(
      {
        deletedBy: currentUser.id,
      },
      {
        transaction,
      },
    );

    await products.destroy({
      transaction,
    });

    return products;
  }

  static async findBy(where, options) {
    const transaction = (options && options.transaction) || undefined;

    const products = await db.products.findOne({ where }, { transaction });

    if (!products) {
      return products;
    }

    const output = products.get({ plain: true });

    output.online_orders_product = await products.getOnline_orders_product({
      transaction,
    });

    output.reseller_orders_product = await products.getReseller_orders_product({
      transaction,
    });

    output.sales_product = await products.getSales_product({
      transaction,
    });

    output.category = await products.getCategory({
      transaction,
    });

    return output;
  }

  static async findAll(filter, options) {
    const limit = filter.limit || 0;
    let offset = 0;
    let where = {};
    const currentPage = +filter.page;

    offset = currentPage * limit;

    const orderBy = null;

    const transaction = (options && options.transaction) || undefined;

    let include = [
      {
        model: db.categories,
        as: 'category',

        where: filter.category
          ? {
              [Op.or]: [
                {
                  id: {
                    [Op.in]: filter.category
                      .split('|')
                      .map((term) => Utils.uuid(term)),
                  },
                },
                {
                  name: {
                    [Op.or]: filter.category
                      .split('|')
                      .map((term) => ({ [Op.iLike]: `%${term}%` })),
                  },
                },
              ],
            }
          : {},
      },
    ];

    if (filter) {
      if (filter.id) {
        where = {
          ...where,
          ['id']: Utils.uuid(filter.id),
        };
      }

      if (filter.sku) {
        where = {
          ...where,
          [Op.and]: Utils.ilike('products', 'sku', filter.sku),
        };
      }

      if (filter.name) {
        where = {
          ...where,
          [Op.and]: Utils.ilike('products', 'name', filter.name),
        };
      }

      if (filter.purchase_priceRange) {
        const [start, end] = filter.purchase_priceRange;

        if (start !== undefined && start !== null && start !== '') {
          where = {
            ...where,
            purchase_price: {
              ...where.purchase_price,
              [Op.gte]: start,
            },
          };
        }

        if (end !== undefined && end !== null && end !== '') {
          where = {
            ...where,
            purchase_price: {
              ...where.purchase_price,
              [Op.lte]: end,
            },
          };
        }
      }

      if (filter.sale_priceRange) {
        const [start, end] = filter.sale_priceRange;

        if (start !== undefined && start !== null && start !== '') {
          where = {
            ...where,
            sale_price: {
              ...where.sale_price,
              [Op.gte]: start,
            },
          };
        }

        if (end !== undefined && end !== null && end !== '') {
          where = {
            ...where,
            sale_price: {
              ...where.sale_price,
              [Op.lte]: end,
            },
          };
        }
      }

      if (filter.stockRange) {
        const [start, end] = filter.stockRange;

        if (start !== undefined && start !== null && start !== '') {
          where = {
            ...where,
            stock: {
              ...where.stock,
              [Op.gte]: start,
            },
          };
        }

        if (end !== undefined && end !== null && end !== '') {
          where = {
            ...where,
            stock: {
              ...where.stock,
              [Op.lte]: end,
            },
          };
        }
      }

      if (filter.active !== undefined) {
        where = {
          ...where,
          active: filter.active === true || filter.active === 'true',
        };
      }

      if (filter.price_level) {
        where = {
          ...where,
          price_level: filter.price_level,
        };
      }

      if (filter.low_stock_notification) {
        where = {
          ...where,
          low_stock_notification: filter.low_stock_notification,
        };
      }

      if (filter.createdAtRange) {
        const [start, end] = filter.createdAtRange;

        if (start !== undefined && start !== null && start !== '') {
          where = {
            ...where,
            ['createdAt']: {
              ...where.createdAt,
              [Op.gte]: start,
            },
          };
        }

        if (end !== undefined && end !== null && end !== '') {
          where = {
            ...where,
            ['createdAt']: {
              ...where.createdAt,
              [Op.lte]: end,
            },
          };
        }
      }
    }

    const queryOptions = {
      where,
      include,
      distinct: true,
      order:
        filter.field && filter.sort
          ? [[filter.field, filter.sort]]
          : [['createdAt', 'desc']],
      transaction: options?.transaction,
      logging: console.log,
    };

    if (!options?.countOnly) {
      queryOptions.limit = limit ? Number(limit) : undefined;
      queryOptions.offset = offset ? Number(offset) : undefined;
    }

    try {
      const { rows, count } = await db.products.findAndCountAll(queryOptions);

      return {
        rows: options?.countOnly ? [] : rows,
        count: count,
      };
    } catch (error) {
      console.error('Error executing query:', error);
      throw error;
    }
  }

  static async findAllAutocomplete(query, limit, offset) {
    let where = {};

    if (query) {
      where = {
        [Op.or]: [
          { ['id']: Utils.uuid(query) },
          Utils.ilike('products', 'name', query),
        ],
      };
    }

    const records = await db.products.findAll({
      attributes: ['id', 'name'],
      where,
      limit: limit ? Number(limit) : undefined,
      offset: offset ? Number(offset) : undefined,
      orderBy: [['name', 'ASC']],
    });

    return records.map((record) => ({
      id: record.id,
      label: record.name,
    }));
  }
};