const { Region, Zone } = require('../models');

exports.getRegions = async (req, res) => {
  try {
    const regions = await Region.findAll({
      order: [['name', 'ASC']]
    });

    res.json({ success: true, regions });
  } catch (error) {
    console.error('Get regions error:', error);
    res.status(500).json({ success: false, message: 'Error fetching regions' });
  }
};

exports.createRegion = async (req, res) => {
  try {
    const { regionName } = req.body;

    if (!regionName) {
      return res.status(400).json({ success: false, message: 'Region name is required' });
    }

    await Region.create({ name: regionName });

    res.status(201).json({ success: true, message: 'Region created successfully' });
  } catch (error) {
    console.error('Create region error:', error);
    res.status(500).json({ success: false, message: 'Error creating region' });
  }
};

exports.updateRegion = async (req, res) => {
  try {
    const { id } = req.params;
    const { regionName, isActive } = req.body;

    const region = await Region.findByPk(id);
    if (!region) {
      return res.status(404).json({ success: false, message: 'Region not found' });
    }

    await region.update({
      name: regionName || region.name,
      updatedAt: new Date()
    });

    res.json({ success: true, message: 'Region updated successfully' });
  } catch (error) {
    console.error('Update region error:', error);
    res.status(500).json({ success: false, message: 'Error updating region' });
  }
};

exports.getZones = async (req, res) => {
  try {
    const { regionId } = req.query;

    const where = {};
    if (regionId) {
      where.regionId = regionId;
    }

    const zones = await Zone.findAll({
      where,
      include: [{
        model: Region,
        as: 'region',
        attributes: ['name']
      }],
      order: [['name', 'ASC']]
    });

    res.json({ success: true, zones });
  } catch (error) {
    console.error('Get zones error:', error);
    res.status(500).json({ success: false, message: 'Error fetching zones' });
  }
};

exports.createZone = async (req, res) => {
  try {
    const { regionId, zoneName, zoneCode } = req.body;

    if (!regionId || !zoneName) {
      return res.status(400).json({ success: false, message: 'Region ID and zone name are required' });
    }

    await Zone.create({
      regionId,
      name: zoneName
    });

    res.status(201).json({ success: true, message: 'Zone created successfully' });
  } catch (error) {
    console.error('Create zone error:', error);
    res.status(500).json({ success: false, message: 'Error creating zone' });
  }
};

exports.updateZone = async (req, res) => {
  try {
    const { id } = req.params;
    const { zoneName, zoneCode, isActive } = req.body;

    const zone = await Zone.findByPk(id);
    if (!zone) {
      return res.status(404).json({ success: false, message: 'Zone not found' });
    }

    await zone.update({
      name: zoneName || zone.name,
      updatedAt: new Date()
    });

    res.json({ success: true, message: 'Zone updated successfully' });
  } catch (error) {
    console.error('Update zone error:', error);
    res.status(500).json({ success: false, message: 'Error updating zone' });
  }
};