const express = require('express');
const router = express.Router();
const { expenseRepository } = require('../repositories');

/**
 * GET /api/plugins/financials/expenses
 * Get all expenses for a site
 */
router.get('/', async (req, res) => {
  try {
    const { site_id, status, category } = req.query;

    if (!site_id) {
      return res.status(400).json({
        success: false,
        error: 'site_id query parameter is required'
      });
    }

    let expenses;

    if (status) {
      expenses = await expenseRepository.findByStatus(site_id, status);
    } else {
      expenses = await expenseRepository.findBySiteId(site_id);
    }

    // Filter by category if provided
    if (category) {
      expenses = expenses.filter(exp => exp.category === category);
    }

    res.json({
      success: true,
      data: expenses,
      message: 'Expenses retrieved successfully'
    });
  } catch (error) {
    console.error('Failed to get expenses:', error);
    res.status(500).json({
      success: false,
      error: 'Failed to retrieve expenses',
      message: error.message
    });
  }
});

/**
 * POST /api/plugins/financials/expenses
 * Create a new expense
 */
router.post('/', async (req, res) => {
  try {
    const { site_id, expense_date, vendor_name, vendor_id, category, description, amount, tax_amount, payment_method, receipt_url, approved_by, notes, created_by } = req.body;

    if (!site_id || !expense_date || !category || !description || !amount) {
      return res.status(400).json({
        success: false,
        error: 'Missing required fields',
        message: 'Site ID, expense date, category, description, and amount are required'
      });
    }

    const expense = await expenseRepository.createExpense({
      site_id,
      expense_date,
      vendor_name,
      vendor_id,
      category,
      description,
      amount,
      tax_amount,
      payment_method,
      receipt_url,
      approved_by,
      notes,
      created_by: created_by || req.user?.id || 'system'
    });

    res.status(201).json({
      success: true,
      data: expense,
      message: 'Expense created successfully'
    });
  } catch (error) {
    console.error('Failed to create expense:', error);
    res.status(500).json({
      success: false,
      error: 'Failed to create expense',
      message: error.message
    });
  }
});

module.exports = router;