<?php
require_once 'config.php';

try {
    $pdo = db();

    // ngos table
    $sql_ngos = "
    CREATE TABLE IF NOT EXISTS ngos (
        id INT AUTO_INCREMENT PRIMARY KEY,
        name VARCHAR(255) NOT NULL,
        email VARCHAR(255) NOT NULL UNIQUE,
        created_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP
    );";
    $pdo->exec($sql_ngos);
    echo "Database table 'ngos' created successfully (if it didn't exist).\n";

    // Add ngo_id to food_listings table
    try {
        $sql_alter = "ALTER TABLE food_listings ADD COLUMN ngo_id INT NULL AFTER volunteer_id, ADD FOREIGN KEY (ngo_id) REFERENCES ngos(id) ON DELETE SET NULL";
        // I am getting an error with volunteer_id not existing, so I will add it first.
        $sql_add_volunteer_id = "ALTER TABLE food_listings ADD COLUMN volunteer_id INT NULL AFTER status";
        $pdo->exec($sql_add_volunteer_id);
        $pdo->exec($sql_alter);
        echo "Altered 'food_listings' table to add 'ngo_id'.\n";
    } catch (PDOException $e) {
        // If the column already exists, this will fail, which is okay.
        echo "Could not alter 'food_listings' table (maybe 'ngo_id' already exists or other schema issue). Error: " . $e->getMessage() . "\n";
    }

} catch (PDOException $e) {
    die("DB ERROR: " . $e->getMessage());
}