const db = require('../config/database');

exports.getAllUsageCategories = async (req, res) => {
  try {
    const [rows] = await db.query('SELECT * FROM usage_categories');
    res.json({ success: true, data: rows });
  } catch (error) {
    res.status(500).json({ success: false, error: error.message });
  }
};

exports.getUsageCategoryById = async (req, res) => {
  try {
    const [rows] = await db.query('SELECT * FROM usage_categories WHERE usage_category_id = ?', [req.params.id]);
    if (rows.length === 0) {
      return res.status(404).json({ success: false, error: 'Usage category not found' });
    }
    res.json({ success: true, data: rows[0] });
  } catch (error) {
    res.status(500).json({ success: false, error: error.message });
  }
};

exports.createUsageCategory = async (req, res) => {
  try {
    const { category_name } = req.body;
    
    const [result] = await db.query(
      'INSERT INTO usage_categories (category_name) VALUES (?)',
      [category_name]
    );
    
    res.status(201).json({ 
      success: true, 
      message: 'Usage category created successfully',
      data: { usage_category_id: result.insertId }
    });
  } catch (error) {
    res.status(500).json({ success: false, error: error.message });
  }
};

exports.updateUsageCategory = async (req, res) => {
  try {
    const { category_name } = req.body;
    
    const [result] = await db.query(
      'UPDATE usage_categories SET category_name = ? WHERE usage_category_id = ?',
      [category_name, req.params.id]
    );
    
    if (result.affectedRows === 0) {
      return res.status(404).json({ success: false, error: 'Usage category not found' });
    }
    
    res.json({ success: true, message: 'Usage category updated successfully' });
  } catch (error) {
    res.status(500).json({ success: false, error: error.message });
  }
};

exports.deleteUsageCategory = async (req, res) => {
  try {
    const [result] = await db.query('DELETE FROM usage_categories WHERE usage_category_id = ?', [req.params.id]);
    
    if (result.affectedRows === 0) {
      return res.status(404).json({ success: false, error: 'Usage category not found' });
    }
    
    res.json({ success: true, message: 'Usage category deleted successfully' });
  } catch (error) {
    res.status(500).json({ success: false, error: error.message });
  }
};