import config from '../../config.js';
import { productStockModel } from '../../database/schemas/inventory/productstock.schema.js';
import log4js from 'log4js';
import mongoose from 'mongoose';
import {
  deleteObject,
  listObjects,
  getObject,
  editObject,
  editObjects,
  newObject,
  listObjectsByProperties,
  getModelStats,
  getModelHistory,
  checkStates,
} from '../../database/database.js';
import { productModel } from '../../database/schemas/management/product.schema.js';
const logger = log4js.getLogger('Product Stocks');
logger.level = config.server.logLevel;

export const listProductStocksRouteHandler = async (
  req,
  res,
  page = 1,
  limit = 25,
  property = '',
  filter = {},
  search = '',
  sort = '',
  order = 'ascend'
) => {
  const result = await listObjects({
    model: productStockModel,
    page,
    limit,
    property,
    filter,
    search,
    sort,
    order,
    populate: [{ path: 'product' }, { path: 'partStocks.partStock' }],
  });

  if (result?.error) {
    logger.error('Error listing product stocks.');
    res.status(result.code).send(result);
    return;
  }

  logger.debug(`List of product stocks (Page ${page}, Limit ${limit}). Count: ${result.length}`);
  res.send(result);
};

export const listProductStocksByPropertiesRouteHandler = async (
  req,
  res,
  properties = '',
  filter = {},
  masterFilter = {}
) => {
  const result = await listObjectsByProperties({
    model: productStockModel,
    properties,
    filter,
    populate: ['product', 'partStocks.partStock'],
    masterFilter,
  });

  if (result?.error) {
    logger.error('Error listing product stocks.');
    res.status(result.code).send(result);
    return;
  }

  logger.debug(`List of product stocks. Count: ${result.length}`);
  res.send(result);
};

export const getProductStockRouteHandler = async (req, res) => {
  const id = req.params.id;
  const result = await getObject({
    model: productStockModel,
    id,
    populate: [{ path: 'partStocks.part' }, { path: 'partStocks.partStock' }, { path: 'product' }],
  });
  if (result?.error) {
    logger.warn(`Product Stock not found with supplied id.`);
    return res.status(result.code).send(result);
  }
  logger.debug(`Retrieved product stock with ID: ${id}`);
  res.send(result);
};

export const editProductStockRouteHandler = async (req, res) => {
  const id = new mongoose.Types.ObjectId(req.params.id);

  logger.trace(`Product Stock with ID: ${id}`);

  const checkStatesResult = await checkStates({ model: productStockModel, id, states: ['draft'] });

  if (checkStatesResult.error) {
    logger.error('Error checking product stock states:', checkStatesResult.error);
    res.status(checkStatesResult.code).send(checkStatesResult);
    return;
  }

  if (checkStatesResult === false) {
    logger.error('Product stock is not in draft state.');
    res.status(400).send({ error: 'Product stock is not in draft state.', code: 400 });
    return;
  }

  const updateData = {
    partStocks: req.body?.partStocks?.map((partStock) => ({
      quantity: partStock.quantity,
      partStock: partStock.partStock,
    })),
  };

  const result = await editObject({
    model: productStockModel,
    id,
    updateData,
    user: req.user,
  });

  if (result.error) {
    logger.error('Error editing product stock:', result.error);
    res.status(result).send(result);
    return;
  }

  logger.debug(`Edited product stock with ID: ${id}`);

  res.send(result);
};

export const editMultipleProductStocksRouteHandler = async (req, res) => {
  const updates = req.body.map((update) => ({
    _id: update._id,
  }));

  if (!Array.isArray(updates)) {
    return res.status(400).send({ error: 'Body must be an array of updates.', code: 400 });
  }

  const result = await editObjects({
    model: productStockModel,
    updates,
    user: req.user,
  });

  if (result.error) {
    logger.error('Error editing product stocks:', result.error);
    res.status(result.code || 500).send(result);
    return;
  }

  logger.debug(`Edited ${updates.length} product stocks`);

  res.send(result);
};

export const newProductStockRouteHandler = async (req, res) => {
  const productId = new mongoose.Types.ObjectId(req.body.product?._id);
  const product = await getObject({
    model: productModel,
    id: productId,
  });
  const newData = {
    updatedAt: new Date(),
    currentQuantity: req.body.currentQuantity,
    product: req.body.product,
    state: req.body.state ?? { type: 'draft' },
    partStocks: product.parts.map((part) => ({
      part: part.part,
      quantity: part.quantity,
      partStock: undefined,
    })),
  };
  const result = await newObject({
    model: productStockModel,
    newData,
    user: req.user,
  });
  if (result.error) {
    logger.error('No product stock created:', result.error);
    return res.status(result.code).send(result);
  }

  logger.debug(`New product stock with ID: ${result._id}`);

  res.send(result);
};

export const deleteProductStockRouteHandler = async (req, res) => {
  const id = new mongoose.Types.ObjectId(req.params.id);

  logger.trace(`Product Stock with ID: ${id}`);

  const checkStatesResult = await checkStates({ model: productStockModel, id, states: ['draft'] });

  if (checkStatesResult.error) {
    logger.error('Error checking product stock states:', checkStatesResult.error);
    res.status(checkStatesResult.code).send(checkStatesResult);
    return;
  }

  if (checkStatesResult === false) {
    logger.error('Product stock is not in draft state.');
    res.status(400).send({ error: 'Product stock is not in draft state.', code: 400 });
    return;
  }

  const result = await deleteObject({
    model: productStockModel,
    id,
    user: req.user,
  });
  if (result.error) {
    logger.error('No product stock deleted:', result.error);
    return res.status(result.code).send(result);
  }

  logger.debug(`Deleted product stock with ID: ${result._id}`);

  res.send(result);
};

export const getProductStockStatsRouteHandler = async (req, res) => {
  const result = await getModelStats({ model: productStockModel });
  if (result?.error) {
    logger.error('Error fetching product stock stats:', result.error);
    return res.status(result.code).send(result);
  }
  logger.trace('Product stock stats:', result);
  res.send(result);
};

export const getProductStockHistoryRouteHandler = async (req, res) => {
  const from = req.query.from;
  const to = req.query.to;
  const result = await getModelHistory({ model: productStockModel, from, to });
  if (result?.error) {
    logger.error('Error fetching product stock history:', result.error);
    return res.status(result.code).send(result);
  }
  logger.trace('Product stock history:', result);
  res.send(result);
};

export const postProductStockRouteHandler = async (req, res) => {
  const id = new mongoose.Types.ObjectId(req.params.id);

  logger.trace(`Product Stock with ID: ${id}`);

  const checkStatesResult = await checkStates({ model: productStockModel, id, states: ['draft'] });

  if (checkStatesResult.error) {
    logger.error('Error checking product stock states:', checkStatesResult.error);
    res.status(checkStatesResult.code).send(checkStatesResult);
    return;
  }

  if (checkStatesResult === false) {
    logger.error('Product stock is not in draft state.');
    res.status(400).send({ error: 'Product stock is not in draft state.', code: 400 });
    return;
  }

  const updateData = {
    updatedAt: new Date(),
    state: { type: 'posted' },
    postedAt: new Date(),
  };
  const result = await editObject({
    model: productStockModel,
    id,
    updateData,
    user: req.user,
  });

  if (result.error) {
    logger.error('Error posting product stock:', result.error);
    res.status(result.code).send(result);
    return;
  }

  logger.debug(`Posted product stock with ID: ${id}`);
  res.send(result);
};