import config from '../../config.js';
import { salesOrderModel } from '../../database/schemas/sales/salesorder.schema.js';
import log4js from 'log4js';
import mongoose from 'mongoose';
import {
  deleteObject,
  listObjects,
  getObject,
  editObject,
  editObjects,
  newObject,
  listObjectsByProperties,
  getModelStats,
  getModelHistory,
  checkStates,
  searchObjects,
  getPropertyValues,
  getObjectNeighbors,
} from '../../database/database.js';
import { orderItemModel } from '../../database/schemas/inventory/orderitem.schema.js';
import { shipmentModel } from '../../database/schemas/inventory/shipment.schema.js';

const logger = log4js.getLogger('Sales Orders');
logger.level = config.server.logLevel;

export const listSalesOrdersRouteHandler = async (
  req,
  res,
  page = 1,
  limit = 25,
  property = '',
  filter = {},
  search = '',
  sort = '',
  order = 'ascend'
) => {
  const result = await listObjects({
    model: salesOrderModel,
    page,
    limit,
    property,
    filter,
    search,
    sort,
    order,
    populate: ['client', 'marketplace'],
  });

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

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

export const listSalesOrdersByPropertiesRouteHandler = async (
  req,
  res,
  properties = '',
  filter = {},
  masterFilter = {}
) => {
  const result = await listObjectsByProperties({
    model: salesOrderModel,
    properties,
    filter,
    populate: ['client', 'marketplace'],
    masterFilter,
  });

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

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

export const getSalesOrderPropertyValuesRouteHandler = async (
  req,
  res,
  property,
  filter,
  masterFilter
) => {
  const result = await getPropertyValues({
    model: salesOrderModel,
    property,
    filter: { ...filter, ...masterFilter },
  });
  res.send(result);
};

export const searchSalesOrdersRouteHandler = async (req, res, search) => {
  const result = await searchObjects({
    model: salesOrderModel,
    search,
  });
  res.send(result);
};

export const getSalesOrderRouteHandler = async (req, res) => {
  const id = req.params.id;
  const result = await getObject({
    model: salesOrderModel,
    id,
    populate: ['client', 'marketplace'],
  });
  if (result?.error) {
    logger.warn(`Sales Order not found with supplied id.`);
    return res.status(result.code).send(result);
  }
  logger.debug(`Retreived sales order with ID: ${id}`);
  res.send(result);
};

export const editSalesOrderRouteHandler = async (req, res) => {
  // Get ID from params
  const id = new mongoose.Types.ObjectId(req.params.id);

  logger.trace(`Sales Order with ID: ${id}`);

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

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

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

  const updateData = {
    updatedAt: new Date(),
    client: req.body.client,
    marketplace: req.body.marketplace,
  };
  // Create audit log before updating
  const result = await editObject({
    model: salesOrderModel,
    id,
    updateData,
    user: req.user,
    populate: ['client', 'marketplace'],
  });

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

  logger.debug(`Edited sales order with ID: ${id}`);

  res.send(result);
};

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

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

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

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

  logger.debug(`Edited ${updates.length} sales orders`);

  res.send(result);
};

export const newSalesOrderRouteHandler = async (req, res) => {
  const newData = {
    updatedAt: new Date(),
    client: req.body.client,
    marketplace: req.body.marketplace,
    totalAmount: 0,
    totalAmountWithTax: 0,
    totalTaxAmount: 0,
  };
  const result = await newObject({
    model: salesOrderModel,
    newData,
    user: req.user,
  });
  if (result.error) {
    logger.error('No sales order created:', result.error);
    return res.status(result.code).send(result);
  }

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

  res.send(result);
};

export const deleteSalesOrderRouteHandler = async (req, res) => {
  // Get ID from params
  const id = new mongoose.Types.ObjectId(req.params.id);

  logger.trace(`Sales Order with ID: ${id}`);

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

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

  res.send(result);
};

export const getSalesOrderStatsRouteHandler = async (req, res) => {
  const result = await getModelStats({ model: salesOrderModel });
  if (result?.error) {
    logger.error('Error fetching sales order stats:', result.error);
    return res.status(result.code).send(result);
  }
  logger.trace('Sales order stats:', result);
  res.send(result);
};

export const getSalesOrderHistoryRouteHandler = async (req, res) => {
  const from = req.query.from;
  const to = req.query.to;
  const result = await getModelHistory({ model: salesOrderModel, from, to });
  if (result?.error) {
    logger.error('Error fetching sales order history:', result.error);
    return res.status(result.code).send(result);
  }
  logger.trace('Sales order history:', result);
  res.send(result);
};

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

  logger.trace(`Sales Order with ID: ${id}`);

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

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

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

  const orderItemsResult = await listObjects({
    model: orderItemModel,
    filter: { order: id, orderType: 'salesOrder' },
    pagination: false,
  });

  const shipmentsResult = await listObjects({
    model: shipmentModel,
    filter: { order: id, orderType: 'salesOrder' },
    pagination: false,
  });

  for (const orderItem of orderItemsResult) {
    if (orderItem.state.type != 'draft') {
      logger.warn(`Order item ${orderItem._id} is not in draft state.`);
      return res
        .status(400)
        .send({ error: `Order item ${orderItem._reference} not in draft state.`, code: 400 });
    }
    if (!orderItem?.shipment || orderItem?.shipment == null) {
      logger.warn(`Order item ${orderItem._id} does not have a shipment.`);
      return res
        .status(400)
        .send({ error: `Order item ${orderItem._reference} does not have a shipment.`, code: 400 });
    }
  }

  for (const shipment of shipmentsResult) {
    if (shipment.state.type != 'draft') {
      logger.warn(`Shipment ${shipment._id} is not in draft state.`);
      return res
        .status(400)
        .send({ error: `Shipment ${shipment._reference} not in draft state.`, code: 400 });
    }
  }

  for (const orderItem of orderItemsResult) {
    await editObject({
      model: orderItemModel,
      id: orderItem._id,
      updateData: {
        state: { type: 'ordered' },
        orderedAt: new Date(),
      },
      user: req.user,
    });
  }

  for (const shipment of shipmentsResult) {
    await editObject({
      model: shipmentModel,
      id: shipment._id,
      updateData: {
        state: { type: 'planned' },
      },
      user: req.user,
    });
  }

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

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

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

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

  logger.trace(`Sales Order with ID: ${id}`);

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

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

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

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

  if (result.error) {
    logger.error('Error confirming sales order:', result.error);
    res.status(result.code).send(result);
    return;
  }

  logger.debug(`Confirmed sales order with ID: ${id}`);
  res.send(result);
};

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

  logger.trace(`Sales Order with ID: ${id}`);

  const checkStatesResult = await checkStates({
    model: salesOrderModel,
    id,
    states: ['sent', 'confirmed', 'partiallyShipped', 'shipped', 'partiallyDelivered'],
  });

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

  if (checkStatesResult === false) {
    logger.error('Sales order is not in a cancellable state.');
    res.status(400).send({
      error: 'Sales order is not in a cancellable state (must be sent, confirmed, partiallyShipped, shipped, or partiallyDelivered).',
      code: 400,
    });
    return;
  }

  const orderItemsResult = await listObjects({
    model: orderItemModel,
    filter: { order: id, orderType: 'salesOrder' },
    pagination: false,
  });

  const shipmentsResult = await listObjects({
    model: shipmentModel,
    filter: { order: id, orderType: 'salesOrder' },
    pagination: false,
  });

  const allowedOrderItemStates = ['ordered', 'shipped'];
  const allowedShipmentStates = ['shipped', 'planned'];

  for (const orderItem of orderItemsResult) {
    if (allowedOrderItemStates.includes(orderItem.state.type)) {
      await editObject({
        model: orderItemModel,
        id: orderItem._id,
        updateData: {
          state: { type: 'cancelled' },
        },
        user: req.user,
      });
    }
  }

  for (const shipment of shipmentsResult) {
    if (allowedShipmentStates.includes(shipment.state.type)) {
      await editObject({
        model: shipmentModel,
        id: shipment._id,
        updateData: {
          state: { type: 'cancelled' },
        },
        user: req.user,
      });
    }
  }
  const updateData = {
    updatedAt: new Date(),
    state: { type: 'cancelled' },
    cancelledAt: new Date(),
  };
  const result = await editObject({
    model: salesOrderModel,
    id,
    updateData,
    user: req.user,
  });

  if (result.error) {
    logger.error('Error cancelling sales order:', result.error);
    res.status(result.code).send(result);
    return;
  }

  logger.debug(`Cancelled sales order with ID: ${id}`);
  res.send(result);
};
export const getSalesOrderNeighborsRouteHandler = async (
  req,
  res,
  property = '',
  filter = {},
  search = '',
  sort = '',
  order = 'ascend',
  id
) => {
  if (!id) {
    return res.status(400).send({ error: 'Missing id parameter', code: 400 });
  }

  const result = await getObjectNeighbors({
    model: salesOrderModel,
    id,
    filter,
    search,
    sort,
    order,
  });

  if (result?.error) {
    logger.error('Error fetching salesOrder neighbors.');
    return res.status(result.code).send(result);
  }

  logger.debug(`Retrieved salesOrder neighbors for ID: ${id}`);
  res.send(result);
};