const express = require('express');
const pool = require('../config/database');
const { AppError } = require('../middleware/errorHandler');

const router = express.Router();

// @route   GET /api/spreader-settings
// @desc    Get all spreader settings
// @access  Private
router.get('/', async (req, res, next) => {
  try {
    const result = await pool.query(
      `SELECT * FROM spreader_settings 
       ORDER BY spreader_brand, spreader_model NULLS LAST, setting_value`
    );

    // Group by brand for easier frontend consumption
    const groupedSettings = result.rows.reduce((acc, setting) => {
      const brand = setting.spreader_brand;
      if (!acc[brand]) {
        acc[brand] = [];
      }
      acc[brand].push({
        id: setting.id,
        model: setting.spreader_model,
        setting: setting.setting_value,
        description: setting.application_rate_description
      });
      return acc;
    }, {});

    res.json({
      success: true,
      data: {
        settings: result.rows,
        groupedSettings
      }
    });
  } catch (error) {
    next(error);
  }
});

// @route   GET /api/spreader-settings/brands
// @desc    Get list of spreader brands
// @access  Private
router.get('/brands', async (req, res, next) => {
  try {
    const result = await pool.query(
      `SELECT DISTINCT spreader_brand as brand, 
              COUNT(*) as setting_count
       FROM spreader_settings 
       GROUP BY spreader_brand
       ORDER BY spreader_brand`
    );

    res.json({
      success: true,
      data: {
        brands: result.rows
      }
    });
  } catch (error) {
    next(error);
  }
});

// @route   GET /api/spreader-settings/:brand
// @desc    Get settings for a specific brand
// @access  Private
router.get('/:brand', async (req, res, next) => {
  try {
    const brand = req.params.brand;
    const result = await pool.query(
      `SELECT * FROM spreader_settings 
       WHERE spreader_brand = $1
       ORDER BY spreader_model NULLS LAST, setting_value`,
      [brand]
    );

    res.json({
      success: true,
      data: {
        brand,
        settings: result.rows
      }
    });
  } catch (error) {
    next(error);
  }
});

module.exports = router;